AMERICAN MIDSTREAM PARTNERS, LP, 8-K filed on 12/7/2017
Current report filing
Document and Entity Information
12 Months Ended
Dec. 31, 2016
Entity Registrant Name
American Midstream Partners, LP 
Entity Central Index Key
0001513965 
Document Type
8-K 
Document Period End Date
Dec. 31, 2016 
Amendment Flag
false 
Document Fiscal Year Focus
2016 
Document Fiscal Period Focus
FY 
Current Fiscal Year End Date
--12-31 
Entity Well-known Seasoned Issuer
No 
Entity Voluntary Filers
No 
Entity Current Reporting Status
Yes 
Entity Filer Category
Accelerated Filer 
Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2015
Current assets
 
 
Cash and cash equivalents
$ 5,666 
$ 1,987 
Accounts receivable, net of allowance for doubtful accounts of $630 as of December 31, 2016
14,715 
9,094 
Unbilled revenue
52,910 
51,922 
Inventory
1,990 
1,295 
Other current assets
25,516 
22,346 
Current assets of discontinued operations
22,727 
25,369 
Total current assets
123,524 
112,013 
Risk management assets - long term
10,627 
0 
Property, plant and equipment, net
1,066,608 
981,321 
Restricted cash - long term
323,564 
5,037 
Investment in unconsolidated affiliates
291,987 
63,704 
Intangible assets, net
205,071 
224,239 
Goodwill
202,135 
204,789 
Other assets, net
11,773 
12,719 
Non-current assets of discontinued operations
114,032 
148,067 
Total assets
2,349,321 
1,751,889 
Current liabilities
 
 
Accounts payable
39,569 
45,377 
Accrued gas purchases
7,891 
7,281 
Accrued expenses and other current liabilities
72,721 
37,260 
Current portion of debt
5,438 
2,758 
Current liabilities of discontinued operations
14,319 
12,781 
Total current liabilities
139,938 
105,457 
Noncurrent asset retirement obligation
44,363 
28,549 
Other liabilities
1,858 
2,482 
Revolving credit agreements
1,235,538 
687,840 
Deferred tax liability
8,205 
6,173 
Non-current liabilities of discontinued operations
172 
375 
Total liabilities
1,430,074 
830,136 
Commitments and contingencies (see Note 19)
   
   
Convertible preferred units
334,090 
169,712 
Equity and partners' capital
 
 
General Partner Interests (680 thousand and 536 thousand units issued and outstanding as of December 31, 2016 and December 31, 2015, respectively)
(47,645)
(47,091)
Accumulated other comprehensive income (loss)
(40)
40 
Total partners' capital
568,402 
739,930 
Noncontrolling interests
16,755 
12,111 
Total equity and partners' capital
585,157 
752,041 
Total liabilities, convertible preferred units, equity and partners' capital
2,349,321 
1,751,889 
Limited Partner Common Units
 
 
Equity and partners' capital
 
 
Limited Partners' Capital Account
616,087 
753,388 
Limited Partner Series B Convertible Units
 
 
Equity and partners' capital
 
 
Limited Partners' Capital Account
0 
33,593 
3.77% Senior Notes, due 2031
 
 
Current liabilities
 
 
Senior Notes
55,979 
0 
8.50% Senior Notes, due 2021
 
 
Current liabilities
 
 
Senior Notes
291,309 
0 
Revolving Credit Agreements
 
 
Current liabilities
 
 
Revolving credit agreements
$ 888,250 
$ 687,100 
Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2015
Limited Partner Series B Convertible Units
Allowance for doubtful accounts
$ 630 
 
 
General partners' interest units issued (in shares)
680,000 
536,000 
 
General partners' interest units outstanding (in shares)
680,000 
536,000 
 
Limited partners, units issued (in shares)
51,351,000 
50,504,000 
1,350,000 
Limited partners, units outstanding (in shares)
51,351,000 
50,504,000 
1,350,000 
Consolidated Statements of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Revenues:
 
 
 
Commodity sales
$ 439,412 
$ 613,241 
$ 721,663 
Services
151,231 
135,718 
116,195 
Losses on commodity derivatives, net
(1,617)
1,345 
1,091 
Total revenue
589,026 
750,304 
838,949 
Operating expenses:
 
 
 
Cost of sales
393,351 
567,682 
672,948 
Direct operating expenses
71,544 
71,729 
58,048 
Corporate expenses
89,438 
65,327 
60,465 
Depreciation, amortization and accretion
90,882 
81,335 
57,818 
Loss on sale of assets, net
688 
2,860 
4,087 
Loss on impairment of property, plant and equipment
697 
0 
21,344 
Loss on impairment of goodwill
2,654 
148,488 
0 
Total operating expenses
649,254 
937,421 
874,710 
Operating loss
(60,228)
(187,117)
(35,761)
Other income (expense):
 
 
 
Interest expense
(21,433)
(20,077)
(16,497)
Loss on extinguishment of debt
0 
0 
(1,634)
Other income (expense)
254 
1,460 
(1,096)
Earnings in unconsolidated affiliates
40,158 
8,201 
348 
Loss from continuing operations, before income taxes
(41,249)
(197,533)
(54,640)
Income tax expense
(2,580)
(1,885)
(856)
Loss from continuing operations
(43,829)
(199,418)
(55,496)
Loss from discontinued operations, net of tax
(4,715)
(423)
(24,071)
Net income (loss)
(48,544)
(199,841)
(79,567)
Net income (loss) attributable to noncontrolling interests
2,766 
(13)
3,993 
Net loss attributable to the Partnership
(51,310)
(199,828)
(83,560)
Distribution declared per common unit (in dollars per share)
$ 3.01 
$ 3.17 
$ 1.85 
Basic and diluted:
 
 
 
Loss from continuing operations, basic and diluted (in usd per share)
$ (1.51)
$ (4.91)
$ (2.77)
Loss from discontinued operations, basic and diluted (in usd per share)
$ (0.09)
$ (0.01)
$ (0.52)
Net loss, basic and diluted (in usd per share)
$ (1.60)
$ (4.92)
$ (3.29)
Weighted average number of common units outstanding:
 
 
 
Basic and diluted (in shares)
51,176 
45,050 
27,524 
General Partner
 
 
 
Other income (expense):
 
 
 
Net income (loss)
(233)
(1,823)
(398)
General Partner's interest in net loss
(233)
(1,823)
(398)
Limited Partner
 
 
 
Other income (expense):
 
 
 
Net income (loss)
(51,077)
(198,005)
(83,162)
Limited Partners' interest in net loss
$ (51,077)
$ (198,005)
$ (83,162)
Consolidated Statements of Comprehensive Income (Loss) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
 
 
 
Net loss
$ (48,544)
$ (199,841)
$ (79,567)
Unrealized gain (loss) relating to postretirement benefit plan
(80)
38 
(102)
Comprehensive loss
(48,624)
(199,803)
(79,669)
Less: Net income (loss) attributable to noncontrolling interests
2,766 
(13)
3,993 
Comprehensive loss attributable to Partnership
$ (51,390)
$ (199,790)
$ (83,662)
Consolidated Statements of Changes in Partners' Capital and Noncontrolling Interests (USD $)
In Thousands, unless otherwise specified
Total
Accumulated Other Comprehensive Income
Total Partners Capital
Noncontrolling Interest
Blackwater
Total Partners Capital
Blackwater
Noncontrolling Interest
Series B
Series B
Total Partners Capital
Delta House
Total Partners Capital
BP
Total Partners Capital
General Partner
General Partner
Delta House
General Partner
BP
Limited Partner
Limited Partner
Blackwater
Beginning Balance at Dec. 31, 2013
 
$ 104 
$ 671,193 
$ 7,884 
 
 
 
 
 
 
$ 59,754 
 
 
$ 611,335 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income (loss)
(79,567)
 
(83,560)
 
 
 
 
 
 
 
(398)
 
 
(83,162)
 
Issuance of units
 
 
609,707 
 
 
 
32,220 
32,220 
 
 
 
 
 
609,707 
 
Unitholder contributions
 
 
5,678 
 
 
 
 
 
 
 
5,678 
 
 
 
 
Unitholder distributions
 
 
(134,019)
 
 
 
 
 
 
 
(2,913)
 
 
(131,106)
 
Contributions from general partner
 
 
(47,678)
 
 
 
 
 
 
 
 
 
 
(47,678)
 
Issuance and exercise of warrants
 
 
0 
 
 
 
 
 
 
 
(7,164)
 
 
7,164 
 
Contributions from noncontrolling interest owners
 
 
 
 
21 
189 
 
 
 
 
 
 
 
 
21 
Distributions to noncontrolling interest owners
 
 
0 
(314)
 
 
 
 
 
 
 
 
 
 
 
LTIP vesting
 
 
244 
 
 
 
 
 
 
 
(823)
 
 
1,067 
 
Tax netting repurchases
610 
 
(256)
 
 
 
 
 
 
 
 
 
 
(256)
 
Equity compensation expense
 
 
3,145 
 
 
 
 
 
 
 
1,356 
 
 
1,789 
 
Other comprehensive income (loss)
(102)
(102)
(102)
 
 
 
 
 
 
 
 
 
 
 
 
Ending Balance at Dec. 31, 2014
 
2 
1,056,593 
11,752 
 
 
32,220 
 
 
 
55,490 
 
 
968,881 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income (loss)
(199,841)
 
(199,828)
 
 
 
 
 
 
 
(1,823)
 
 
(198,005)
 
Issuance of units
 
 
85,465 
 
 
 
1,373 
1,373 
 
 
 
 
 
85,465 
 
Unitholder contributions
 
 
1,996 
 
 
 
 
 
 
 
1,996 
 
 
0 
 
Unitholder distributions
 
 
(118,763)
 
 
 
 
 
 
 
(7,023)
 
 
(111,740)
 
Contributions from general partner
 
 
5,568 
 
 
 
 
 
 
 
 
 
 
5,568 
 
Contributions from noncontrolling interest owners
 
 
0 
739 
 
 
 
 
 
 
 
 
 
 
 
Unitholder distribution for Delta House Transaction
 
 
 
 
 
 
 
 
(96,297)
 
 
(96,297)
 
 
 
Distributions to noncontrolling interest owners
 
 
(20)
(367)
 
 
 
 
 
 
 
 
 
(20)
 
LTIP vesting
 
 
196 
 
 
 
 
 
 
 
(2,490)
 
 
2,686 
 
Tax netting repurchases
1,045 
 
(756)
 
 
 
 
 
 
 
 
 
 
(756)
 
Equity compensation expense
 
 
4,365 
 
 
 
 
 
 
 
3,056 
 
 
1,309 
 
Other comprehensive income (loss)
38 
38 
38 
 
 
 
 
 
 
 
 
 
 
 
 
Ending Balance at Dec. 31, 2015
739,930 
40 
739,930 
12,111 
 
 
33,593 
 
 
 
(47,091)
 
 
753,388 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income (loss)
(48,544)
 
(51,310)
2,766 
 
 
 
 
 
 
(233)
 
 
(51,077)
 
Unitholder contributions
 
 
1,998 
 
 
 
 
 
 
 
1,998 
 
 
 
 
Unitholder distributions
 
 
(138,699)
 
 
 
 
 
 
 
(7,938)
 
 
(130,761)
 
Cancellation of escrow units
 
 
(6,817)
 
 
 
 
 
 
 
 
 
 
(6,817)
 
Conversion of Series B Units
 
 
 
 
 
 
(33,593)
 
 
 
 
 
 
33,593 
 
Contributions from general partner
 
 
9,900 
 
 
 
 
 
 
 
 
 
 
9,900 
 
Issuance and exercise of warrants
 
 
4,481 
 
 
 
 
 
 
 
4,481 
 
 
 
 
Issuance of common units, net of offering costs
 
 
2,697 
 
 
 
 
 
 
 
 
 
 
2,697 
 
Contributions from noncontrolling interest owners
 
 
0 
3,366 
 
 
 
 
 
 
 
 
 
 
 
Unitholder distribution for Delta House Transaction
 
 
 
 
 
 
 
 
 
 
(96,300)
 
 
 
 
General Partner's contribution for acquisition
 
 
 
 
 
 
 
 
 
990 
 
 
990 
 
 
Distributions to noncontrolling interest owners
 
 
0 
(1,488)
 
 
 
 
 
 
 
 
 
 
 
LTIP vesting
 
 
0 
 
 
 
 
 
 
 
(3,486)
 
 
3,486 
 
Tax netting repurchases
521 
 
(346)
 
 
 
 
 
 
 
 
 
 
(346)
 
Equity compensation expense
 
 
5,658 
 
 
 
 
 
 
 
3,634 
 
 
2,024 
 
Other comprehensive income (loss)
(80)
(80)
(80)
 
 
 
 
 
 
 
 
 
 
 
 
Ending Balance at Dec. 31, 2016
$ 568,402 
$ (40)
$ 568,402 
$ 16,755 
 
 
$ 0 
 
 
 
$ (47,645)
 
 
$ 616,087 
 
Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash flows from operating activities
 
 
 
Net loss
$ (48,544)
$ (199,841)
$ (79,567)
Adjustments to reconcile net loss to net cash provided by operating activities:
 
 
 
Depreciation, amortization and accretion expense
107,029 
100,877 
76,219 
Amortization of deferred financing costs
3,236 
2,391 
3,118 
Amortization of weather derivative premium
966 
912 
1,035 
Unrealized (gain) loss on derivative contracts, net
(11,400)
(11,269)
12,050 
Non-cash compensation expense
5,658 
5,172 
3,415 
Postretirement benefit plan benefit
(17)
(14)
(45)
Loss on sale of assets, net
2,756 
4,189 
12,443 
Loss on impairment of property, plant and equipment
697 
4,970 
23,328 
Loss on impairment of noncurrent assets held for sale
0 
0 
673 
Loss on impairment of goodwill
15,456 
156,427 
0 
Loss on extinguishment of debt
0 
0 
1,634 
Other non-cash items
(469)
(1,256)
656 
Earnings in unconsolidated affiliates
(40,158)
(8,201)
(348)
Distributions from unconsolidated affiliates
40,158 
8,201 
348 
Deferred tax expense
2,057 
953 
213 
Allowance for bad debts
1,038 
1,212 
820 
Changes in operating assets and liabilities, net of effects of assets acquired and liabilities assumed:
 
 
 
Accounts receivable
(5,430)
5,609 
79,804 
Inventory
(1,909)
13,095 
17,716 
Unbilled revenue
(219)
53,120 
(51,158)
Risk management assets and liabilities
(1,030)
(875)
(809)
Other current assets
(795)
1,948 
(16,099)
Other assets, net
682 
(80)
6,068 
Accounts payable
(2,242)
(50,885)
(28,732)
Accrued gas purchases
610 
(7,045)
(5,540)
Accrued expenses and other current liabilities
15,384 
3,623 
(4,657)
Asset retirement obligations
(858)
(90)
(1,030)
Other liabilities
483 
835 
80 
Corporate overhead support from General Partner
7,500 
3,000 
0 
Net cash provided by operating activities
90,639 
86,978 
51,635 
Cash flows from investing activities
 
 
 
Cost of acquisitions, net of cash acquired and settlements
(2,676)
(5,200)
(362,316)
Investments in unconsolidated affiliates
(150,179)
(65,701)
(12,000)
Additions to property, plant and equipment
(147,796)
(208,040)
(153,876)
Proceeds from disposal of property, plant and equipment
11,788 
8,730 
17,648 
Distributions from unconsolidated affiliates, return of capital
42,886 
12,367 
1,632 
Restricted cash
(318,527)
7,075 
(9,111)
Net cash used in investing activities
(564,504)
(250,769)
(518,023)
Cash flows from financing activities
 
 
 
Proceeds from issuance of common units, net of offering costs
2,825 
82,488 
466,893 
Unitholder contributions
1,998 
1,905 
5,588 
Unitholder distributions
(112,136)
(100,411)
(119,965)
Redemption of Series D preferred units - JPE
0 
0 
(42,436)
Contributions from noncontrolling interest owners
3,366 
584 
0 
LTIP tax netting unit repurchases
(521)
(1,045)
(610)
Payment of financing costs
(5,327)
(2,244)
(7,034)
Proceeds from debt
425,100 
471,300 
883,885 
Payments on revolving credit agreements
(223,950)
(240,150)
(736,227)
Payments on other debt
(3,136)
(4,069)
(7,621)
Other
0 
(688)
(1,344)
Borrowings on other debt
0 
4,709 
3,449 
Contributions from the predecessor
2,400 
1,218 
4,321 
Net cash provided by financing activities
477,544 
161,954 
466,577 
Net increase (decrease) in cash and cash equivalents
3,679 
(1,837)
189 
Cash and cash equivalents
 
 
 
Beginning of period
1,987 
3,824 
3,635 
End of period
5,666 
1,987 
3,824 
Blackwater
 
 
 
Cash flows from financing activities
 
 
 
Unitholder distributions for common control transactions
0 
(96,297)
(52,000)
Noncontrolling Interest
 
 
 
Cash flows from operating activities
 
 
 
Net loss
2,766 
 
 
Cash flows from financing activities
 
 
 
Distributions to noncontrolling interest owners
(1,488)
(114)
(322)
Series A Preferred Stock
 
 
 
Cash flows from financing activities
 
 
 
Issuance of units
34,413 
44,768 
0 
Limited Partner Series B Convertible Units
 
 
 
Cash flows from financing activities
 
 
 
Issuance of units
0 
0 
30,000 
Series D
 
 
 
Cash flows from financing activities
 
 
 
Issuance of units
0 
0 
40,000 
3.77% Senior Notes, due 2031
 
 
 
Cash flows from financing activities
 
 
 
Proceeds from debt
60,000 
0 
0 
8.50% Senior Notes, due 2021
 
 
 
Cash flows from financing activities
 
 
 
Proceeds from debt
$ 294,000 
$ 0 
$ 0 
Consolidated Statements of Cash Flows (Parenthical) (Senior Notes)
Dec. 31, 2016
3.77% Senior Notes, due 2031
Sep. 30, 2016
3.77% Senior Notes, due 2031
Dec. 31, 2016
8.50% Senior Notes, due 2021
Dec. 28, 2016
8.50% Senior Notes, due 2021
Debt instrument, interest rate (percent)
3.77% 
3.77% 
8.50% 
8.50% 
Organization and Basis of Presentation
Organization and Basis of Presentation
Organization, Basis of Presentation and Summary of Significant Accounting Policies

General

American Midstream Partners, LP (the “Partnership”, “we”, “us”, or “our”) is a growth-oriented Delaware limited partnership that was formed on August 20, 2009 to own, operate, develop and acquire a diversified portfolio of midstream energy assets. The Partnership’s general partner, American Midstream GP, LLC (the “General Partner”), is 77% owned by High Point Infrastructure Partners, LLC (“HPIP”) and 23% owned by Magnolia Infrastructure Holdings, LLC, both of which are affiliates of ArcLight Capital Partners, LLC ("ArcLight"). Our capital accounts consist of notional General Partner units and units representing limited partner interests.

Nature of business

We provide critical midstream infrastructure that links producers of natural gas, crude oil, NGLs, condensate and specialty chemicals to numerous intermediate and end-use markets. Through our five reportable segments, (1) gas gathering and processing services, (2) liquid pipelines and services, (3) natural gas transportation services, (4) offshore pipelines and services, and (5) terminalling services, we engage in the business of gathering, treating, processing, and transporting natural gas; gathering, transporting, storing, treating and fractionating NGLs; gathering, storing and transporting crude oil and condensates and storing specialty chemical products and selling refined products. Most of our cash flow is generated from fee-based and fixed-margin compensation for gathering, processing, transporting and treating natural gas and crude oil, firm capacity reservation charges, interruptible transportation charges, guaranteed firm storage contracts, throughput fees and other optional charges associated with ancillary services.

Our primary assets are strategically located in some of the most prolific onshore and offshore producing regions and key demand markets in the United States. Our gathering and processing assets are primarily located in (i) the Permian Basin of West Texas, (ii) the Cotton Valley/Haynesville Shale of East Texas, (iii) the Eagle Ford Shale of South Texas, (iv) the Bakken Shale of North Dakota, and (v) offshore in the Gulf of Mexico. Our transmission and terminal assets are in key demand markets in Oklahoma, Alabama, Arkansas, Louisiana, Mississippi and Tennessee and in the Port of New Orleans in Louisiana and the Port of Brunswick in Georgia.

Basis of presentation

As discussed in Note 2, we acquired JP Energy Partners, LP ("JPE") in a unit-for-unit exchange on March 8, 2017. As both the Partnership and JPE were controlled by ArcLight, the acquisition represents a transaction among entities under common control and has been accounted for as a common control transaction in a manner similar to a pooling of interests. Although the Partnership is the legal acquirer, JPE is considered to be the acquirer for accounting purposes as ArcLight obtained control of JPE before it obtained control the Partnership. The accompanying financial statements represent the JPE historical cost basis financial statements retrospectively adjusted to reflect its acquisition of the Partnership at ArcLight’s historical cost basis effective April 15, 2013, the date on which ArcLight obtained control of the Partnership. As the Partnership was the legal acquirer, unit amounts included in the accompanying financial statements represent the Partnership’s historical unit amounts plus the JPE unit amounts adjusted by the applicable exchange ratios.

Discontinued Operations

On September 1, 2017, we completed the disposition of the Propane Marketing Services business (the "Propane Business") pursuant to the Membership Interest Purchase Agreement dated July 21, 2017, between AMID Merger LP, a wholy owned subsidiary of the Partnership and SHV Energy N.V. Through the transaction, we divested Pinnacle Propane’s 40 service locations; Pinnacle Propane Express’ cylinder exchange business and related logistic assets; and the Alliant Gas utility system. Prior to the sale, we moved the trucking business from the Propane Marketing Services segment to the Liquid Pipelines and Services segment for all periods presented. During the years ended December 31, 2016, 2015, and 2014, the trucking business had revenues of $6.9 million, $10.3 million, and $11.3 million, respectively, which represent 5%, 6%, and 6% of total Propane Business revenue, respectively. Additionally, for the years ended December 31, 2016, 2015, and 2014, the trucking business had inter-segment revenues of $2.0 million, $2.1 million, and $3.7 million with the Propane Business that were previously eliminated in consolidation, and are now included in the total trucking business revenue, with the offsetting expenses included in discontinued operations.

In connection with the transaction, we received $170.0 million in cash and recorded a gain on the sale of $46.5 million, net of $2.5 million transaction costs. As a result of the disposition of the Propane Business, we have classified the accounts and the results of operations of the Propane Business as discontinued operations. See Note 3 for additional details.

Transactions between entities under common control
 
We may enter into transactions with ArcLight affiliates whereby we receive midstream assets or other businesses in exchange for cash or Partnership equity. We account for the net assets acquired at the affiliate's historical cost basis as the transactions are between entities under common control. In certain cases, our historical financial statements will be revised to include the results attributable to the assets acquired from the later of April 15, 2013 (the date Arclight affiliates obtained control of our General Partner) or the date the ArcLight affiliate obtained control of the assets acquired.

Consolidation policy

The accompanying consolidated financial statements include accounts of American Midstream Partners, LP, and its controlled subsidiaries. All significant inter-company accounts and transactions have been eliminated in the preparation of the accompanying consolidated financial statements.

Use of estimates

When preparing consolidated financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP"), management must make estimates and assumptions based on information available at the time. These estimates and assumptions affect the reported amounts of assets, liabilities, revenues and expenses, as well as the disclosures of contingent assets and liabilities as of the date of the financial statements. Estimates and assumptions are based on information available at the time such estimates and assumptions are made. Adjustments made with respect to the use of these estimates and assumptions often relate to information not previously available. Uncertainties with respect to such estimates and assumptions are inherent in the preparation of financial statements. Estimates and assumptions are used in, among other things, i) estimating unbilled revenues, product purchases and operating and general and administrative costs, ii) developing fair value assumptions, including estimates of future cash flows and discount rates, iii) analyzing long-lived assets, goodwill and intangible assets for possible impairment, iv) estimating the useful lives of assets and v) determining amounts to accrue for contingencies, guarantees and indemnifications. Actual results, therefore, could differ materially from estimated amounts.

Cash, cash equivalents and restricted cash

We consider all highly liquid investments with an original maturity of three months or less at the date of purchase to be cash equivalents. The carrying value of cash and cash equivalents approximates fair value because of the short term to maturity of these investments.

From time to time we are required to maintain cash in separate accounts the use of which is restricted by the terms of our debt agreements or asset retirement obligations. Such amounts are included in Restricted cash in our consolidated balance sheets.

Inventory

Inventory is mainly comprised of crude oil, NGLs and refined products for resale. Inventory is stated at the lower of cost or market. The cost of crude oil, NGLs, and refined products is determined using the first-in, first-out (FIFO) method.

Allowance for doubtful accounts
We establish provisions for losses on accounts receivable when we determine that we will not collect all or part of an outstanding balance. Collectability is reviewed regularly and an allowance is established or adjusted, as necessary, using the specific identification method.

Derivative financial instruments

Our net income (loss) and cash flows are subject to volatility stemming from changes in interest rates on our variable rate debt, commodity prices and fractionation margins (the relative difference between the price we receive from NGL sales and the corresponding cost of natural gas purchases). In an effort to manage the risks to unitholders, we use a variety of derivative financial instruments including swaps, collars and interest rate caps to create offsetting positions to specific commodity or interest rate exposures. We record all derivative financial instruments in our consolidated balance sheets at fair value as current and long-term assets or liabilities on a net basis by counterparty. We record changes in the fair value of our commodity derivatives in Gains (losses) on commodity derivatives, net while changes in the fair value of our interest rate swaps are included in Interest expense in our consolidated statements of operations.

Our hedging program provides a control structure and governance for our hedging activities specific to identified risks and time periods, which are subject to the approval and monitoring by the Board of Directors of our General Partner. We employ derivative financial instruments in connection with an underlying asset, liability or anticipated transaction, and we do not use derivative financial instruments for speculative or trading purposes.

The price assumptions we use to value our derivative financial instruments can affect our net income (loss) each period. We use published market price information where available, or quotations from over-the-counter, market makers to find executable bids and offers. The valuations also reflect the potential impact of related conditions, including credit risk of our counterparties. The amounts reported in our consolidated financial statements change quarterly as these valuations are revised to reflect actual results, changes in market conditions or other factors, many of which are beyond our control.

We are also a party to a number of contracts that have elements of a derivative instrument. These contracts are primarily forward crude oil purchase and sales contracts with counterparties. Although many of these contracts have the requisite elements of a derivative instrument, these contracts qualify for the normal purchase and normal sales exception because they provide for the delivery of products or services in quantities that are expected to be used in the normal course of operating our business and the price in the contract is based on an underlying that is directly associated with the price of the product or service being purchased or sold. As a result, these contracts are not recorded in our consolidated financial statements until they are settled.

Fair value measurements

We apply the authoritative accounting provisions for measuring the fair value of our derivative financial instruments and disclosures associated with our outstanding indebtedness. We define fair value as an exit price representing the expected amount we would receive when selling an asset or pay to transfer a liability in an orderly transaction with market participants at the measurement date.

We use various assumptions and methods in estimating the fair values of our financial instruments. The carrying amounts of cash and cash equivalents, accounts receivable and accounts payable approximated their fair value due to the short-term maturity of these instruments.

We employ a hierarchy which prioritizes the inputs we use to measure recurring fair value into three distinct categories based upon whether such inputs are observable in active markets or unobservable. We classify assets and liabilities in their entirety based on the lowest level of input that is significant to the fair value measurement. Our methodology for categorizing assets and liabilities that are measured at fair value pursuant to this hierarchy gives the highest priority to unadjusted quoted prices in active markets and the lowest level to unobservable inputs as outlined below:

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Level 1 – Inputs represent unadjusted quoted prices in active markets for identical assets or liabilities;
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Level 2 – Inputs include quoted prices for similar assets and liabilities in active markets that are either directly or indirectly observable; and
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Level 3 – Inputs are unobservable and considered significant to fair value measurement.

We utilize a mid-market pricing convention, or the "market approach," for valuation for assigning fair value to our derivative assets and liabilities. Our credit exposure for over-the-counter derivatives is directly with our counterparty and continues until the maturity or termination of the contracts. As appropriate, valuations are adjusted for various factors such as credit and liquidity considerations.

Property, plant and equipment

We capitalize expenditures related to property, plant and equipment that have a useful life greater than one year. We also capitalize expenditures that improve or extend the useful life of an asset. Maintenance and repair costs, including any planned major maintenance activities, are expensed as incurred.

We record property, plant, and equipment at cost and recognize depreciation expense on a straight-line basis over the related estimated useful lives of the assets which range from 3 to 40 years. Our determination of the useful lives of property, plant and equipment requires us to make various assumptions, including the supply of and demand for hydrocarbons in the markets served by our assets, normal wear and tear of the facilities, and the extent and frequency of maintenance programs. We record depreciation using the group method of depreciation, which is commonly used by pipelines, utilities and similar assets.

We classify long-lived assets to be disposed of through sales that meet specific criteria as held for sale. We cease depreciating those assets effective on the date the asset is classified as held for sale. We record those assets at the lower of their carrying value or the estimated fair value less the cost to sell. Until the assets are disposed of, our estimate of fair value is re-determined when related events or circumstances change.

Impairment of long lived Assets

We evaluate the recoverability of our property, plant and equipment and intangible assets with definite lives when events or circumstances indicate we may not recover the carrying amount of the assets. We continually monitor our operations, the market, and business environment to identify indicators that could suggest an asset or asset group may not be recoverable. We evaluate the asset or asset group for recoverability by estimating the undiscounted future cash flows expected to be derived from their use and disposition. These cash flow estimates require us to make projections and assumptions for many years into the future for pricing, demand, competition, operating cost, contract renewals, and other factors. An asset or asset group is considered impaired when the estimated undiscounted cash flows are less than the carrying amount. In that event, an impairment loss is recognized to the extent that the carrying amount of the asset or asset group exceeds its fair value as determined by quoted market prices in active markets or present value techniques. The determination of fair values using present value techniques requires us to make projections and assumptions regarding future cash flows and weighted average cost of capital. Any changes we make to these projections and assumptions could result in significant revisions to our evaluation of the recoverability of our property, plant and equipment and the recognition of an impairment loss in our consolidated statements of operations.

Goodwill and intangible assets

We record goodwill for the excess of the cost of an acquisition over the fair value of the net assets of the acquired business. Goodwill is reviewed for impairment at least annually or more frequently if an event or change in circumstance indicates that an impairment may have occurred. We first assess qualitative factors to evaluate whether it is more likely than not that an impairment has occurred and it is therefore necessary to perform the two-step goodwill impairment test. If the two-step goodwill impairment test indicates that the goodwill is impaired, an impairment loss is recorded.

We record the estimated fair value of acquired customer contracts, relationships and dedicated acreage agreements as intangible assets. These intangible assets have definite lives and are subject to amortization on a straight-line basis over their economic lives, currently ranging between 5 years and 30 years. We assess intangible assets for impairment together with related underlying long-lived assets whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable.

Investment in unconsolidated affiliates

We hold membership interests in entities that own and operate natural gas pipeline systems and NGL and crude oil pipelines in and around Louisiana, Alabama, Mississippi and the Gulf of Mexico. While we have significant influence over these entities, we do not control them and therefore, they are accounted for using the equity method and are reported in Investment in unconsolidated affiliates in the consolidated balance sheets. We evaluate the recoverability of these investments on a regular basis and recognize impairment write downs if we determine a loss in value represents an other than temporary decline.







Deferred financing costs

Costs incurred in connection with our revolving credit agreements are deferred and charged to interest expense over the term of the related credit arrangement. Such amounts are included in Other assets, net in our consolidated balance sheets. Costs incurred in connection with our 8.50% Senior Notes and 3.77% Senior Notes are also deferred and charged to interest expense over the respective term of the agreements; however, these amounts are reflected as a reduction of the related obligation. Gains or losses on debt repurchases or extinguishment include any associated unamortized deferred financing costs.

Asset retirement obligations

Asset retirement obligations ("ARO") are legal obligations associated with the retirement of tangible long-lived assets that result from the asset's acquisition, construction, development and operation. An ARO is initially measured at its estimated fair value. Upon initial recognition, we also record an increase to the carrying amount of the related long-lived asset. We depreciate the asset using the straight-line method over the period during which it is expected to provide benefits. After initial recognition, we revise the ARO to reflect the passage of time and for changes in the estimated amount or timing of cash flows.

We have legal obligations requiring us to decommission our offshore pipeline systems at retirement. In certain rate jurisdictions, we are permitted to include annual charges for removal costs in the regulated cost of service rates we charge our customers. Additionally, legal obligations exist for certain of our offshore right-of-way agreements due to requirements or landowner options to compel us to remove the pipe at final abandonment. Sufficient data exists with certain onshore pipeline systems to reasonably estimate the cost of abandoning or retiring a pipeline system. However, in some cases, there is insufficient information to reasonably determine the timing and/or method of settlement for purposes of estimating the fair value of the asset retirement obligation. In these cases, the asset retirement obligation cost is considered indeterminate because there is no data or information that can be derived from past practice, industry practice, management's experience, or the asset's estimated economic life. The useful lives of most pipeline systems are primarily derived from available supply resources and ultimate consumption of those resources by end users. Variables can affect the remaining lives of the assets which preclude us from making a reasonable estimate of the asset retirement obligation. Indeterminate asset retirement obligation costs will be recognized in the period in which sufficient information exists to reasonably estimate potential settlement dates and methods.

Commitments, contingencies and environmental liabilities

We expense or capitalize, as appropriate, expenditures for ongoing compliance with environmental regulations that relate to past or current operations. We expense amounts we incur from the remediation of existing environmental contamination caused by past operations that do not benefit future periods by preventing or eliminating future contamination. We record liabilities for environmental matters when assessments indicate that remediation efforts are probable and the costs can be reasonably estimated. Estimates of environmental liabilities are based on currently available facts, existing technology and presently enacted laws and regulation taking into consideration the likely effects of inflation and other factors. These amounts also take into account our prior experience in remediating contaminated sites, other companies' clean-up experience and data released by government organizations. Our estimates are subject to revision in future periods based on actual cost or new information. We evaluate recoveries from insurance coverage separately from the liability and, when recovery is probable, we record an asset separately from the associated liability in our consolidated financial statements.

We recognize liabilities for other commitments and contingencies when, after fully analyzing the available information, we determine it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. When a range of probable loss can be estimated, we accrue the most likely amount or if no amount is more likely than another, we accrue the minimum of the range of probable loss. We expense legal costs associated with loss contingencies as such costs are incurred.

Noncontrolling interests

Noncontrolling interests represent the minority interest holders' proportionate share of the equity in certain of our consolidated subsidiaries and are adjusted for the minority interest holders' proportionate share of the subsidiaries' earnings or losses each period.

Revenue recognition

We recognize revenue from the sale of commodities (e.g., natural gas, crude oil, NGLs or condensate) as well as from the provision of gathering, processing, transportation or storage services when all of the following criteria are met: i) persuasive evidence of an exchange arrangement exists, ii) delivery has occurred or services have been rendered, iii) the price is fixed or determinable, and iv) collectability is reasonably assured. We recognize revenue from the sale of commodities and the related cost of product sold on a gross basis for those transactions where we act as the principal and take title to commodities that are purchased for resale.

Cost of sales

Cost of sales represent the cost of commodities purchased for resale or obtained in connection with certain of our customer revenue arrangements. These costs do not include an allocation of depreciation expense or direct operating costs.

Corporate expenses

Corporate expenses include compensation costs for executives and administrative personnel, professional service fees, rent expense and other general and administrative expenses and are recognized as incurred.

Operational balancing agreements and natural gas imbalances

To facilitate deliveries of natural gas and provide for operational flexibility, we have operational balancing agreements in place with other interconnecting pipelines. These agreements ensure that the volume of natural gas a shipper schedules for transportation between two interconnecting pipelines equals the volume actually delivered. If natural gas moves between pipelines in volumes that are more or less than the volumes the shipper previously scheduled, a natural gas imbalance is created. The imbalances are settled through periodic cash payments or repaid in-kind through future receipt or delivery of natural gas. Natural gas imbalances are recorded in Other current assets or Accrued expenses and other current liabilities on our consolidated balance sheets at cost which approximates fair value.

Equity-based compensation

We award equity-based compensation to management, non-management employees and directors under our long-term incentive plans, which provide for the issuance of options, unit appreciation rights, restricted units, phantom units, other unit-based awards, unit awards or replacement awards, as well as tandem distribution equivalent rights ("DERs"). Compensation expense is measured by the fair value of the award at the date of grant as determined by management. Compensation expense is recognized in Corporate expenses and Direct operating expenses over the requisite service period of each award.

Income taxes

The Partnership is not a taxable entity for U.S. federal income tax purposes or for the majority of states that impose an income tax. Taxes on our net income are generally borne by our unitholders through the allocation of taxable income. American Midstream Blackwater, LLC, a subsidiary of the Partnership, owns a subsidiary that has operations which are subject to both federal and state income taxes. We account for income taxes of that subsidiary using the asset and liability approach. If it is more than likely that a deferred tax asset will not be realized, a valuation allowance is recognized.

Margin tax expense results from the enactment of laws by the State of Texas that apply to entities organized as partnerships and is included in Income tax expense in our consolidated statements of operations. The Texas margin tax is computed on the portion of our taxable margin which is apportioned to Texas.

Net income (loss) for financial statement purposes may differ significantly from taxable income (loss) allocable to unitholders as a result of differences between the financial reporting and income tax bases of our assets and liabilities and the taxable income allocation requirement under our Partnership Agreement. The aggregate difference in the basis of our net assets for financial and tax reporting purposes cannot be readily determined because information regarding each partner's tax attributes in us is not available.

Accumulated other comprehensive income (loss)

Accumulated other comprehensive income (loss) is comprised solely of adjustments related to the Partnership's postretirement benefit plan.

Limited partners' net income (loss) per unit

We compute earnings per unit using the two-class method. The two-class method requires that securities that meet the definition of a participating security be considered for inclusion in the computation of basic earnings per unit. Under the two-class method, earnings per unit is calculated as if all of the earnings for the period were distributed under the terms of the Partnership Agreement, regardless of whether the General Partner has discretion over the amount of distributions to be made in any particular period, whether those earnings would actually be distributed during a particular period from an economic or practical perspective, or whether the General Partner has other legal or contractual limitations on its ability to pay distributions that would prevent it from distributing all of the earnings for a particular period.

The two-class method does not impact our overall net income or other financial results; however, in periods in which aggregate net income exceeds our aggregate distributions for such period, it will have the impact of reducing net income per limited partner unit. This result occurs as a larger portion of our aggregate earnings, as if distributed, is allocated to the incentive distribution rights of the General Partner, even though we make distributions on the basis of available cash and not earnings. In periods in which our aggregate net income does not exceed our aggregate distributions for such period, the two-class method does not have any impact on our calculation of earnings per limited partner unit.

New Accounting Pronouncements

Recently Adopted Accounting Standards

In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2015-03, Simplifying the Presentation of Debt Issuance Costs. This update requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. ASU 2015-03 is effective for fiscal years beginning after December 15, 2015, including interim periods therein, and is applied retrospectively. Early adoption is permitted for financial statements that have not been previously issued. ASU 2015-15, Presentation and Subsequent Measurement of Debt Issue Costs Associated with Line of Credit Arrangements, was subsequently issued to address the absence of authoritative guidance for debt issuance costs related to line-of-credit arrangements and states that the Securities and Exchange Commission ("SEC") staff will not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement.

The Partnership adopted the requirements of ASU No. 2015-03 effective January 1, 2016 and classifies the debt issuance costs applicable to its 8.50% Senior Notes and 3.77% Senior Notes as a reduction of the related debt obligation. Additionally, the Partnership continues to classify the debt issuance costs relating to its Credit Agreement within Other assets, net as allowed by ASU No. 2015-15.
 
In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805). This update requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 is effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. The Partnership adopted the updated guidance effective January 1, 2016 without impact to its financial statements.

Accounting Standards Issued Not Yet Adopted

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which amends the existing accounting guidance for revenue recognition. The update requires an entity to recognize revenue in a manner that depicts the transfer of goods or services to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU No. 2015-14 was subsequently issued and deferred the effective date to annual reporting periods beginning after December 15, 2017, including interim reporting periods within that period. In March 2016, the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal Versus Agent Considerations, as further clarification on principal versus agent considerations. In April 2016, the FASB issued ASU No. 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing as further clarification on identifying performance obligations and the licensing implementation guidance. In May 2016, the FASB issued ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, as clarifying guidance on specific narrow scope improvements and practical expedients. We are in the process of reviewing our various customer arrangements in order to determine the impact that these updates will have on our consolidated financial statements and related disclosures. We have engaged a third-party consultant to assist with our review, which we currently expect to complete in the third quarter of 2017.

In February 2016, the FASB issued ASU No. 2016-02 (Topic 842) "Leases" which supersedes the lease recognition requirements in Accounting Standards Codification Topic 840, "Leases". Under ASU No. 2016-02 lessees are required to recognize assets and liabilities on the balance sheet for most leases and provide enhanced disclosures. Leases will continue to be classified as either finance or operating. ASU No. 2016-02 is effective for annual reporting periods, and interim periods within those years beginning after December 15, 2018. Entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements, and there are certain optional practical expedients that an entity may elect to apply. Full retrospective application is prohibited and early adoption by public entities is permitted. Based upon our evaluation to date, we anticipate that the adoption of ASU 2016-02 will have a material effect on our consolidated financial statements as we will be required to reflect our various lease obligations and associated asset use rights on our consolidated balance sheets. The adoption may also impact our debt covenant compliance and may require us to modify or replace certain of our existing information systems. We have not yet determined the timing or manner in which we will implement the updated guidance.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 320): Classification of Cash Receipts and Cash Payments, which addresses eight specific cash flow issues with the objective of reducing the existing diversity of presentation and classification in the statement of cash flows. ASU No. 2016-15 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal periods. Early adoption is permitted, but only if all aspects are adopted in the same period. The Partnership is currently evaluating the impact this update will have on its consolidated statements of cash flows and related disclosures.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash, which aims to improve the disclosure of the change during the period in total cash, cash equivalents and amounts generally described as restricted cash or restricted cash equivalents. Amounts generally described as restricted cash or restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts on the statement of cash flows. The update is effective beginning first quarter of 2018. Early adoption is permitted, but it must occur in the first interim period. Any adjustments required in early adoption of this update should be reflected as of the beginning of the fiscal year that includes the interim period and should be applied using a retrospective transition method to each period. The Partnership is evaluating the impact that this update will have on our consolidated statement of cash flows and related disclosures.
Acquisitions and Divestitures
Acquisitions and Divestitures
Acquisitions

JP Energy Partners

On March 8, 2017, the Partnership completed the acquisition of JPE, an entity controlled by ArcLight affiliates, in a unit-for-unit exchange. In connection with the transaction, each JPE common or subordinated unit held by investors not affiliated with ArcLight was converted into the right to receive 0.5775 of a Partnership common unit, and each JPE common or subordinated unit held by ArcLight affiliates was converted into the right to receive 0.5225 of a Partnership common unit. The Partnership issued a total of 20.2 million of its common units to complete the acquisition, including 9.8 million common units to ArcLight affiliates. Based upon the closing price for our common units on March 8, 2017, the units issued in the exchange had an estimated fair value of $322.2 million.

JPE owns, operates and develops a diversified portfolio of midstream energy assets with three business segments (i) crude oil pipelines and storage, (ii) refined products terminals and storage and (iii) NGL distribution and sales, which together provide midstream infrastructure solutions for the growing supply of crude oil, refined products and NGLs, in the United States.

As both the Partnership and JPE were controlled by ArcLight, the acquisition represents a transaction among entities under common control and is accounted for as a common control transaction in a manner similar to a pooling of interests. Although the Partnership is the legal acquirer, JPE is considered to be the acquirer for accounting purposes as ArcLight obtained control of JPE before it obtained control the Partnership. The accompanying financial statements represent the JPE historical cost basis financial statements, retrospectively adjusted to reflect its acquisition of the Partnership at ArcLight’s historical cost basis effective April 15, 2013, the date on which ArcLight obtained control of the Partnership.

Delta House Investment

On September 18, 2015, the Partnership acquired a 26.3% interest in Pinto Offshore Holdings, LLC ("Pinto"), an entity that owns 49% of the Class A Units of Delta House FPS LLC and of Delta House Oil and Gas Lateral LLC (collectively referred to herein as "Delta House"), a floating production system platform with associated crude oil and gas export pipelines, located in the Mississippi Canyon region of the deepwater Gulf of Mexico ("Delta House").

We acquired our 26.3% non-operated interest in Pinto in exchange for $162.0 million in cash, funded by the proceeds of a public offering of 7.5 million of the Partnership's common units and with borrowings under the Partnership’s Amended and Restated Credit Agreement (the "Credit Agreement"). As a result, we own a minority interest in Pinto, which represents an indirect interest in 12.9% of Delta House's Class A Units. Pursuant to the Pinto LLC Agreement, we have no management control or authority over the day-to-day operations. Our interest in Pinto is accounted for as an equity method investment in the consolidated financial statements.

Because our interest in Delta House was previously owned by an ArcLight affiliate, we recorded our investment at the affiliate's historical cost basis of $65.7 million in Investments in unconsolidated affiliates in our consolidated balance sheets and as an investing activity within the related consolidated statements of cash flows. The amount by which the total consideration exceeded affiliate's historical cost basis was $96.3 million and is recorded as a distribution within the consolidated statements of changes in equity, partners’ capital and noncontrolling interests and as a financing activity in the consolidated statements of cash flows.

On April 25, 2016, the Partnership increased its investment in Delta House through the purchase of 100% of the outstanding membership interests in D-Day Offshore Holdings, LLC (“D-Day”), an Arclight affiliate which owned 1.0% of Delta House Class A Units in exchange for approximately $9.9 million in cash funded with borrowings under our revolving credit agreement.

Because the additional investment in Delta House was previously owned by an ArcLight affiliate, we recorded our investment in D-Day at the affiliate’s historical cost basis of $9.9 million in Investments in unconsolidated affiliates on our consolidated balance sheets and as an investing activity within our condensed consolidated statements of cash flows.

On October 31, 2016, D-Day acquired an additional 6.2% direct interest in Delta House Class A Units from unrelated parties for approximately $48.8 million which was funded with $34.5 million in net proceeds from the issuance of 2,333,333 Series D convertible preferred units ("Series D Preferred Units") to an ArcLight affiliate, plus $14.3 million in cash funded with borrowings under our Credit Agreement. Our share of Delta House earnings is included in the Offshore Pipelines and Services segment gross margin.

Our investments in D-Day and Pinto result in our holding a 20.1% non-operated direct and indirect interests in the Class A units of Delta House as of December 31, 2016. Such interests include a 20.1% interest in Class A Units of Delta House FPS, which are currently entitled to receive 100% of the distributions from Delta House FPS until a certain payout threshold is met. Once the payout threshold is met, approximately 7% of distributions from Delta House FPS will be paid to the Class B membership interests in Delta House FPS.

Emerald Transactions

On April 25, 2016 and April 27, 2016, American Midstream Emerald, LLC (“Emerald”), a wholly-owned subsidiary of the Partnership, entered into two purchase and sale agreements with Emerald Midstream, LLC, an ArcLight affiliate, for the purchase of membership interests in certain midstream entities.

On April 25, 2016, Emerald entered into the first purchase and sale agreement for the purchase of membership interests in entities that own and operate natural gas pipeline systems and NGL pipelines in and around Louisiana, Alabama, Mississippi, and the Gulf of Mexico (the “Pipeline Purchase Agreement”). Pursuant to the Pipeline Purchase Agreement, Emerald acquired (i) 49.7% of the issued and outstanding membership interests of in Destin Pipeline Company, L.L.C. (“Destin”), (ii) 16.7% of the issued and outstanding membership interests of Tri-States NGL Pipeline, L.L.C. ("Tri-States"), and (iii) 25.3% of the issued and outstanding membership interests of Wilprise Pipeline Company, L.L.C. (“Wilprise”), in exchange for approximately $183.6 million (the “Pipeline Transaction”).

The Destin pipeline is a FERC-regulated, 255-mile natural gas transportation system with total capacity of 1.2 Bcf/d. The system originates offshore in the Gulf of Mexico and includes connections with four producing platforms and six producer-operated laterals, including Delta House. The 120-mile offshore portion of the Destin system terminates at the Pascagoula processing plant, which is owned by Enterprise Products Partners, LP, and is the single source of raw natural gas to the plant. The onshore portion of Destin is the sole delivery point for merchant-quality gas from the Pascagoula processing plant and extends 135 miles north in Mississippi. Destin currently serves as the primary transfer of gas flows from the Barnett and Haynesville shale plays to Florida markets through interconnections with major interstate pipelines. Contracted volumes on the Destin pipeline are based on life-of-field dedications, dedicated volumes over a given period, or interruptible volumes as capacity permits. We became the operator of the Destin pipeline on November 1, 2016. The Tri-States pipeline is a FERC-regulated, 161-mile NGL pipeline and sole form of transport to Louisiana-based fractionators for NGLs produced at the Pascagoula plant served by Destin and other facilities. The Wilprise pipeline is a FERC-regulated, approximately 30-mile NGL pipeline that originates at the Kenner Junction and terminates in Sorrento, Louisiana, where volumes flow via pipeline to a Baton Rouge fractionator.

On April 27, 2016, Emerald entered into a second purchase and sale agreement for the purchase of 66.7% of the issued and outstanding membership interests of Okeanos Gas Gathering Company, LLC ("Okeanos"), in exchange for a cash purchase price of approximately $27.4 million (such Purchase and Sale Agreement, the “Okeanos Purchase Agreement,” and such transaction, the “Okeanos Transaction,” and together with the Pipeline Transaction, the “Emerald Transactions”). The Okeanos pipeline is a 100-mile natural gas gathering system located in the Gulf of Mexico with a total capacity of 1.0 Bcf/d. The Okeanos pipeline connects two platforms and one lateral, terminating at the Destin Main Pass 260 platform in the Mississippi Canyon region of the Gulf of Mexico. Contracted volumes on the Okeanos pipeline are based on life-of-field dedication. We became the operator of the Okeanos pipeline on November 1, 2016.

The Partnership funded the aggregate purchase price for the Emerald Transactions with the issuance of 8,571,429 Series C convertible preferred units (the “Series C Units”) representing limited partnership interests in the Partnership and a warrant (the “ Series C Warrant”) to purchase up to 800,000 common units representing limited partnership interests in the Partnership (“common units”) at an exercise price of $7.25 per common unit amounting to a combined value of approximately $120.0 million, plus additional borrowings of $91.0 million under our Credit Agreement. ArcLight affiliates hold and participate in distributions on our Series C Units with such distributions being made in paid-in-kind Series C Units, cash or a combination thereof at the election of the Board of Directors of our General Partner. Our share of earnings of the entities underlying the Emerald transaction is included in the Liquid Pipelines and Services segment gross margin.

Because our interests in the entities underlying the Emerald Transactions were previously owned by an ArcLight affiliate, we recorded our investments at the affiliate’s historical cost basis of $212.0 million, in Investment in unconsolidated affiliates in our consolidated balance sheets, and as an investing activity of $100.9 million within the consolidated statements of cash flows. The amount by which the affiliate's historical basis exceeded total consideration paid was $1.0 million and is recorded as a contribution from our General Partner in the consolidated statements of changes in partners’ capital and noncontrolling interests.

Gulf of Mexico Pipeline

On April 15, 2016, American Panther LLC, ("American Panther"), a 60%-owned subsidiary of the Partnership, acquired approximately 200 miles of crude oil, natural gas, and salt water onshore and offshore Gulf of Mexico pipelines (“Gulf of Mexico Pipeline”) from Chevron Pipeline Company and Chevron Midstream Pipeline, LLC for approximately $2.7 million in cash and the assumption of certain asset retirement obligations. The Partnership controls American Panther and therefore consolidates it for financial reporting purposes.

The American Panther acquisition was accounted for using the acquisition method of accounting and as a result, the purchase price was allocated to the assets acquired and liabilities assumed based on their respective estimated fair values as of the acquisition date. The purchase price allocation included $16.6 million in pipelines, $0.4 million in land, $14.3 million in asset retirement obligations, and $1.8 million in noncontrolling interests.
American Panther contributed revenue of $13.2 million and operating income of $7.4 million to the Partnership for the year ended December 31, 2016. Such amounts are included in the Partnership’s Offshore Pipelines and Services segment. During the year ended December 31, 2016, the Partnership incurred $0.3 million of transaction costs related to the American Panther acquisition which are included in Corporate expenses in our consolidated statements of operations for the periods.
Unaudited pro forma financial information depicting what the Partnership's revenue, net income and per unit amounts would have been had the American Panther acquisition occurred on January 1, 2016, is not available because Chevron Pipeline Company and Chevron Midstream Pipeline, LLC did not historically operate the acquired assets as a standalone business.

Southern Propane Inc.

On May 8, 2015, we acquired substantially all of the assets of Southern Propane Inc. (“Southern”), a Houston-based industrial and commercial propane distribution and logistics company. The acquisition expanded the asset base and market share of our Propane Marketing Services segment, specifically the acceleration of our entry into the Houston, Texas market, as well as expansion of our industrial, non-seasonal customers. The total purchase price of $16.3 million consisted of a $12.5 million cash payment that was paid on the acquisition date, and which was funded through the use of borrowings from our revolving credit facility, a $0.1 million cash payment to the seller as the final working capital adjustment, the issuance of 266,951 common units valued at $3.4 million and a contingent earn-out liability with an acquisition date fair value of $0.3 million. The gross profit targets were not achieved and the remaining $0.2 million liability was released to income in 2016.

The $16.3 million purchase price was allocated to customer relationship intangible assets of $6.2 million, goodwill of $5.8 million, property, plant and equipment of $3.0 million, accounts receivable of $1.0 million and other intangible assets of $0.3 million. Goodwill associated with the acquisition principally results from synergies expected from integrated operations. The fair values of the acquired intangible assets were estimated by applying the income approach which is based on significant inputs that are not observable in the market and represents a Level 3 measurement. The customer relationship assets are being amortized over a weighted average useful life of 12 years. The Southern acquisition is part of the Propane Business that was sold in September 2017, see Note 3 for additional information regarding the sale of the Propane Business.

Costar Acquisition

On October 14, 2014, the Partnership acquired 100% of the membership interests of Costar Midstream, L.L.C. ("Costar") from Energy Spectrum Partners VI LP and Costar Midstream Energy, LLC, in exchange for cash and common units with an aggregate value of $405.3 million. Costar is an onshore gathering and processing company with its primary gathering, processing, fractionation, and off-spec condensate treating and stabilization assets in East Texas and the Permian basin, with a significant crude oil gathering system project in the Bakken oil play.

The Costar acquisition was accounted for using the acquisition method of accounting and as a result, the purchase price was allocated to the assets acquired and liabilities assumed based on their respective fair values as of the acquisition date. The excess of the aggregate purchase price of the fair values of the assets acquired, liabilities assumed and the noncontrolling interest was classified as goodwill, which was attributable to future prospective customer agreements expected to be obtained as a result of the acquisition. The operating systems acquired have been included in the Partnership’s Gathering and Processing segment from the acquisition date.

During 2015, the Partnership reached agreements with the Costar sellers regarding certain matters which resulted in a return of $7.4 million of cash to the Partnership and related reductions in the goodwill initially recorded. Additionally, in February 2016, the Partnership reached a settlement of certain indemnification claims with the Costar sellers whereby 1,034,483 common units held in escrow with a fair value of $6.8 million were returned to the Partnership, while the Partnership agreed to pay the Costar sellers an additional $0.3 million. The net impact of this settlement was recorded as a reduction in property, plant and equipment in the first quarter of 2016. The Partnership recognized a $95.0 million impairment of the remaining Costar goodwill in fourth quarter of 2015.

Lavaca Acquisition

On January 31, 2014, the Partnership acquired approximately 120 miles of high- and low-pressure pipelines and associated facilities located in the Eagle Ford shale in Gonzales and Lavaca Counties, Texas from Penn Virginia Corporation (NYSE: PVA) ("PVA") for $104.4 million in cash. The Lavaca acquisition was financed with proceeds from the Partnership's January 2014 equity offering and from the issuance of Series B Units to our General Partner.

The Lavaca acquisition was accounted for using the acquisition method of accounting and, as a result, the purchase price was allocated to the assets acquired upon their respective fair values as of the acquisition date. The excess of the purchase price over the fair value of the assets acquired was classified as goodwill, which was attributable to future prospective customer agreements expected to be obtained as a result of the acquisition. The operating systems acquired have been included in the Partnership’s Gathering and Processing segment from the acquisition date. The Partnership recognized a $23.6 million impairment of the remaining Lavaca goodwill in the fourth quarter of 2015.

JP Development

On February 12, 2014, JPE acquired a variety of midstream assets from JP Energy Development, LP (“JP Development”), an entity controlled by ArcLight, for $319.1 million, comprised of 5,841,205 of JPE Class A Common Units and $52.0 million in cash funded by borrowings under JPE’s revolving credit facility. As both JPE and JP Development were controlled by ArcLight, the acquisition represented a transaction among entities under common control and was accounted for as a common control transaction in a manner similar to a pooling of interests. In connection with the acquisition, ArcLight forgave related amounts receivable totaling $4.3 million. The cash portion of the purchase less the receivable forgiven has been reflected as a unitholder distribution for the JP Development transaction in the consolidated statement of equity and partners’ capital for the year ended December 31, 2014.
Discontinued Operations
Discontinued Operations
Discontinued Operations

Propane Business

On September 1, 2017, we completed the disposition of the Propane Business pursuant to the Membership Interest Purchase Agreement dated July 21, 2017, between AMID Merger LP, a wholly owned subsidiary of the Partnership, and SHV Energy N.V. Through the transaction, we divested Pinnacle Propane’s 40 service locations; Pinnacle Propane Express’ cylinder exchange business and related logistic assets; and the Alliant Gas utility system. Prior to the sale, we moved the trucking business from the Propane Marketing Services segment to the Liquid Pipelines and Services segment. With the disposition of the Propane Business, we eliminated the Propane Marketing Services segment.

In connection with the transaction, we received approximately $170 million in cash, net of customary closing adjustments, and recorded a gain of approximately $46.5 million, net of $2.5 million of transaction costs. We have reported the accounts and the results of our Propane Business as discontinued operations in our consolidated financial statements for all periods presented. The following tables summarize the financial information related to the Propane Business for the corresponding years.



Consolidated Statements of Operations
 
Year Ended December 31,
 
2016
 
2015
 
2014
 
(in thousands)
 
 
 
 
 
 
Total revenues
$
137,896

 
$
163,583

 
$
181,843

Costs and Expenses
 
 
 
 
 
Costs of sales
49,672

 
62,621

 
116,924

Direct operating expenses
51,828

 
55,751

 
51,495

Corporate expenses
9,992

 
12,508

 
12,279

Depreciation, amortization and accretion
15,936

 
17,261

 
14,709

Loss on sale of assets, net
2,182

 
1,060

 
993

Loss on impairment of goodwill
12,802

 
—

 
—

  Total expenses
142,412

 
149,201

 
196,400

 
 
 
 
 
 
Operating (loss) income
(4,516
)
 
14,382

 
(14,557
)
 
 
 
 
 
 
Other Income(expense)
 
 
 
 
 
Interest expense
(36
)
 
(43
)
 
(61
)
Other income
374

 
272

 
434

Income (loss) from discontinued operations before income tax benefit (expense)
(4,178
)
 
14,611

 
(14,184
)
 
 
 
 
 
 
Income tax benefit (expense)
2

 
(3
)
 
(1
)
Net income (loss) from discontinued operations
$
(4,176
)
 
$
14,608

 
$
(14,185
)

 
Consolidated Balance Sheets

The current and non-current assets and liabilities of the Propane Business are as follows:
 
 
December 31,
 
 
2016
 
2015
 
 
(in thousands)
ASSETS
 
 
 
 
Current assets
 
 
 
 
   Accounts receivable, net
 
$
13,055

 
$
14,736

   Unbilled revenue
 
2,736

 
3,506

   Inventory
 
4,785

 
3,946

   Other current assets
 
2,151

 
451

Total current assets of discontinued operations
 
22,727

 
22,639

 
 
 
 
 
Non-current assets
 
 
 
 
   Property, plant and equipment, net
 
78,395

 
90,194

   Goodwill
 
15,361

 
28,162

   Intangible assets, net
 
20,212

 
23,041

   Risk management assets
 
37

 
—

   Other assets, net
 
27

 
26

Total non-current assets of discontinued operations
 
114,032

 
141,423

      Total assets
 
$
136,759

 
$
164,062

 
 
 
 
 
LIABILITIES
 
 
 
 
Current liabilities
 
 
 
 
   Accounts payable
 
$
5,709

 
$
3,148

   Accrued expenses and other current liabilities
 
8,563

 
8,852

   Current portion of long-term debt
 
47

 
141

Total current liabilities of discontinued operations
 
14,319

 
12,141

 
 
 
 
 
Non-current liabilities
 
 
 
 
   Other liabilities
 
172

 
375

Total non-current liabilities of discontinued operations
 
172

 
375

Total liabilities
 
$
14,491

 
$
12,516


The following table summarizes other selected financial information related to the Propane Business:
 
 
Year ended December 31,
 
 
2016
 
2015
 
2014
 
 
(in thousands)
 
 
 
 
 
 
 
Depreciation
 
$
13,108

 
$
14,455

 
$
12,298

Amortization
 
2,828

 
2,806

 
2,411

Capital expenditures
 
6,549

 
17,503

 
16,398

 
 
 
 
 
 
 
Other operating non-cash items
 
 
 
 
 
 
      Impairment of goodwill
 
12,802

 
—

 
—

      Loss on sale of assets
 
2,182

 
1,060

 
993

      Unrealized (gain) loss on derivative contracts, net
 
(1,072
)
 
(11,764
)
 
12,691

 
 
 
 
 
 
 



Mid-Continent
On February 1, 2016, we sold certain trucking and marketing assets in the Mid-Continent area (the “Mid-Continent Business”) to JP Development for $9.7 million in cash. We recognized a loss on the disposal of approximately $12.9 million during the year ended December 31, 2015, which primarily related to goodwill and long-lived asset impairment charges. Prior to the classification as discontinued operations, we reported the Mid-Continent Business in our Liquid Pipelines and Services segment.

Financial information for the Mid-Continent Business which is included in Loss from discontinued operations in the consolidated statement of operations is summarized below:
 
Year Ended December 31,
 
2016
 
2015
 
2014
 
(in thousands)

 
 
 
 
 
Total revenues
$
11,495

 
$
429,784

 
$
967,480

Costs and Expenses
 
 
 
 
 
Costs of sales
11,687

 
426,886

 
961,428

Direct operating expenses
203

 
2,269

 
2,866

Loss on impairment of goodwill and assets held for sale
—

 
12,909

 
—

Depreciation, amortization and accretion
211

 
2,281

 
2,258

(Gain) loss on sale of assets, net
(114
)
 
119

 
229

  Total expenses
11,987

 
444,464

 
966,781

 
 
 
 
 
 
Operating (loss) income
(492
)
 
(14,680
)
 
699

 
 
 
 
 
 
Other income (expense)
(47
)
 
(271
)
 
(366
)
Income (loss) from discontinued operations before income tax expense
(539
)
 
(14,951
)
 
333

 
 
 
 
 
 
Income tax expense
—

 
—

 
—

Net income (loss) from discontinued operations
$
(539
)
 
$
(14,951
)
 
$
333





The current and non-current assets and liabilities of the Mid-Continent Business are as follows:
 
 
 
December 31,
 
 
 
2015
ASSETS
 
 
 
Current assets
 
 
 
   Inventory
 
 
$
2,692

   Other current assets
 
 
38

Total current assets of discontinued operations
 
 
2,730

 
 
 
 
Non-current assets
 
 
 
   Property, plant and equipment, net
 
 
5,203

   Intangible assets, net
 
 
1,138

   Other assets, net
 
 
303

Total non-current assets of discontinued operations
 
 
6,644

      Total assets
 
 
$
9,374

 
 
 
 
LIABILITIES
 
 
 
Current liabilities
 
 
 
   Accrued expenses and other current liabilities
 
 
$
640

Total current assets of discontinued operations
 
 
640

      Total liabilities
 
 
$
640


Bakken Business
On June 30, 2014, we sold our trucking and related assets in North Dakota, Montana and Wyoming (the “Bakken Business”) to Gold Spur Trucking, LLC for $9.1 million. We recognized a loss on this sale of approximately $7.3 million during the second quarter of 2014, which primarily related to the write-off of a related customer contract. We also recognized a $2.0 million goodwill impairment charge in connection with the transaction

Financial information for the Bakken Business which is included in Loss from discontinued operations, net of tax in the consolidated statement of operations is summarized below:
 
Year Ended December 31, 2014
 
(in thousands)
Total revenues
$
7,865

Costs and Expenses
 
Cost of sales
5,254

Direct operating expenses
1,324

Corporate expenses
448

Depreciation, amortization and accretion
1,433

Loss on sale of assets, net
9,032

   Total expenses
17,491

 
 
Operating loss
(9,626
)
 
 
Interest expense
(4
)
Other income
22

Loss from discontinued operations before income tax expense
$
(9,608
)

Blackwater

On December 17, 2013, we acquired Blackwater Midstream Holdings LLC ("Blackwater") from an ArcLight affiliate. As part of the Blackwater acquisition, we acquired certain long-lived terminal assets which were immediately classified as held for sale. Due to deteriorating market conditions, the Partnership recognized an impairment charge on these assets of $0.7 million in 2014. These assets were sold during the third quarter of 2015 at a nominal loss.

Selected financial information for the portion of the Blackwater business sold which is included in Loss from discontinued operations, net of tax in the consolidated statement of operations is summarized below:
 
Years Ended December 31,
 
2015
 
2014
 
(in thousands)
Total revenues
$
74

 
$
474

Expenses
(196
)
 
(658
)
Impairment
—

 
(673
)
Loss on sale of assets
(150
)
 
(87
)
Income tax benefit
192

 
333

Loss from discontinued operations
$
(80
)
 
$
(611
)

We have elected to not separately present the cash flows from operating, investing and financing activities related to the discontinued operations described above in our consolidated statements of cash flows.
Concentration of Credit Risk
Concentration of Credit Risk
Concentration of Credit Risk

Significant customers are defined as those who represent 10% of more of our consolidated revenue during the year. In 2016, we had two such customers who accounted for 21% and 13%, respectively, of our consolidated revenue. In 2015, we had one such customer who accounted for 34% of our consolidated revenue. In 2014, we had two such customers who accounted for 20% and 11%, respectively, of our consolidated revenue.

We are party to various commercial netting agreements that allow us and contractual counterparties to net receivable and payable obligations. These agreements are customary and the terms follow standard industry practice. In the opinion of management, these agreements reduce the overall counterparty risk exposure.
Inventory
Inventory
Inventory

Inventory consists of the following:

 
December 31,
 
 
2016
 
2015
 
 
(in thousands)
Crude oil
 
$
1,216

 
$
486

NGLs
 
288

 
274

Refined products
 
—

 
232

Materials, supplies and equipment
 
486

 
303

      Total inventory
 
$
1,990

 
$
1,295

Other Current Assets
Other Current Assets
Other Current Assets

Other current assets consists of the following:
 
December 31,
 
2016
 
2015
 
(in thousands)
Prepaid insurance
$
9,702

 
$
5,187

Insurance receivables
1,624

 
84

Other receivables
2,997

 
2,680

Due from related parties
4,833

 
8,749

Risk management assets
469

 
365

Other assets
5,891

 
5,281

      Total other current assets
$
25,516

 
$
22,346

Risk Management Activities
Risk Management Activities
Risk Management Activities

Commodity Derivatives

To limit the effect of commodity price changes and maintain our cash flow and the economics of our development plans, we enter into commodity derivative contracts from time to time. The terms of the contracts depend on various factors, including management's view of future commodity prices, economics on purchased assets and future financial commitments. This hedging program is designed to mitigate the effect of commodity price declines while allowing us to participate to some extent in commodity price increases. Management regularly monitors the commodity markets and our financial commitments to determine if, when, and at what level commodity hedging is appropriate in accordance with policies that are established by the board of directors of our General Partner.

To meet this objective, we use a combination of fixed price swaps, basis swaps and forward contracts. We enter into commodity contracts with multiple counterparties, and in some cases, may be required to post collateral with our counterparties in connection with our derivative positions. The counterparties are not required to post collateral with us in connection with their derivative positions. Netting agreements are in place that permit us to offset our commodity derivative asset and liability positions with our counterparties. At times, we may also terminate or unwind hedges or portions of hedges in order to meet cash flow objectives or when the expected future volumes do not support the level of hedges. Our forward contracts that qualify for the normal purchase normal sale exception are recognized when the underlying physical transaction is delivered. While these contracts are considered derivative financial instruments, they are not recorded at fair value, but on an accrual basis of accounting. If it is determined that a transaction no longer meets the exception, the fair value of the related contract is recorded on the consolidated balance sheets and immediately recognized through earnings.

The following table summarizes the net notional volume buy (sell) of our outstanding commodity-related derivatives, excluding those derivatives that qualified for the normal purchase normal sale exception as of December 31, 2016 and 2015, none of which were designated as hedges for accounting purposes.
 
 
December 31, 2016
 
December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
Notional Volume
 
Maturity
 
Notional Volume
 
Maturity
Commodity Swaps:
 
 
 
 
 
 
 
 
Crude Oil Fixed Price (Barrels)
 
—
 
—
 
(93,000)
 
Jan 2016
Crude Oil Basis (Barrels)
 
180,000
 
Jan 2017 - Mar 2017
 
—
 
—


Interest Rate Swaps

To manage the impact of the interest rate risk associated with our Credit Agreement, we enter into interest rate swaps from time to time, effectively converting a portion of the cash flows related to our long-term variable rate debt into fixed rate cash flows.
Notional Amount
Term
Fair Value
(in thousands)
 
(in thousands)
$200,000
January 3, 2017 thru September 3, 2019
$
1,912

$100,000
January 1, 2017 thru December 31, 2017
(71
)
$100,000
January 1, 2018 thru January 31, 2019
226

$100,000
January 1, 2018 thru December 31, 2021
3,090

$150,000
January 1, 2018 thru December 31, 2022
5,219

 
 
$
10,376



The fair value of our interest rate swaps was estimated using a valuation methodology based upon forward interest rate and volatility curves as well as other relevant economic measures, if necessary. Discount factors may be utilized to extrapolate a forecast of future cash flows associated with long dated transactions or illiquid market points. The inputs, which represent Level 2 inputs in the valuation hierarchy, are obtained from independent pricing services and we have made no adjustments to those prices.

Weather Derivative

In the second quarters of 2016 and 2015, we entered into weather derivatives to mitigate the impact of potential unfavorable weather to our operations under which we could receive payments totaling up to $30.0 million in the event that a hurricane or hurricanes of certain strength pass through the area as identified in the related agreement. The weather derivatives, which are accounted for using the intrinsic value method, were entered into with a single counterparty and we were not required to post collateral.

We paid premiums of $1.0 million and $0.9 million in 2016 and 2015, respectively, which are amortized to Direct operating expenses on a straight-line basis over the 1 year term of the contract. Unamortized amounts associated with weather derivatives were approximately $0.4 million at December 31, 2016 and 2015, and are included in Other current assets on the consolidated balance sheets.

Our interest rate swaps, commodity swaps and weather derivatives were recorded in our consolidated balance sheets, under the following captions:
 
 
Gross Risk Management Position
 
Netting Adjustment
 
Net Risk Management Position
Balance Sheet Classification
 
December 31, 2016
 
December 31, 2015
 
December 31, 2016
 
December 31, 2015
 
December 31, 2016
 
December 31, 2015
 
 
(in thousands)
Other current assets
 
$
541

 
$
457

 
$
(72
)
 
$
(92
)
 
$
469

 
$
365

Risk management assets - long term
 
10,628

 
—

 
(1
)
 
—

 
10,627

 
—

Total assets
 
$
11,169

 
$
457

 
$
(73
)
 
$
(92
)
 
$
11,096

 
$
365

 
 
 
 
 
 
 
 
 
 
 
 
 
Accrued expenses and other current liabilities
 
$
(253
)
 
$
(92
)
 
$
72

 
$
92

 
$
(181
)
 
$
—

Other liabilities
 
(1
)
 
—

 
1

 
—

 
—

 
—

Total liabilities
 
$
(254
)
 
$
(92
)
 
$
73

 
$
92

 
$
(181
)
 
$
—


For the years ended December 31, 2016, 2015 and 2014, the realized and unrealized gains (losses) associated with our commodity, interest rate and weather derivative instruments were recorded in our consolidated statements of operations, under the following captions:
 
 
Realized
 
Unrealized
 
 
(in thousands)
2016
 

Losses on commodity derivatives, net
 
$
(1,569
)
 
$
(48
)
Interest expense
 
(144
)
 
10,375

Direct operating expenses
 
(966
)
 
—

Total
 
$
(2,679
)
 
$
10,327

2015
 
 
 
 
Gains (losses) on commodity derivatives, net
 
$
1,632

 
$
(287
)
Interest expense
 
(425
)
 
373

Direct operating expenses
 
(913
)
 
—

Total
 
$
294

 
$
86

2014
 
 
 
 
Gains on commodity derivatives, net
 
$
734

 
$
357

Interest expense
 
(707
)
 
284

Direct operating expenses
 
(1,035
)
 
—

Total
 
$
(1,008
)
 
$
641

Property, Plant and Equipment, Net
Property, Plant and Equipment, Net
Property, Plant and Equipment, Net

Property, plant and equipment, net. consists of the following:
 
 
Useful Life
(in years)
 
December 31,
2016
 
December 31,
2015
 
 
 
(in thousands)
Land
N/A
 
$
18,861

 
$
14,118

Construction in progress
N/A
 
128,519

 
56,134

Transportation equipment
5 to 15
 
20,010

 
22,125

Buildings and improvements
4 to 40
 
13,762

 
12,121

Processing and treating plants
8 to 40
 
120,977

 
102,111

Pipelines and compressors
3 to 40
 
804,815

 
775,486

Storage
3 to 40
 
146,408

 
144,780

Equipment
5 to 20
 
77,978

 
53,097

Total property, plant and equipment
 
 
1,331,330

 
1,179,972

Less accumulated depreciation
 
 
(264,722
)
 
(198,651
)
Property, plant and equipment, net
 
 
$
1,066,608

 
$
981,321



At December 31, 2016 and 2015, gross property, plant and equipment included $291.1 million and $228.9 million, respectively, related to our FERC regulated interstate and intrastate assets.

Depreciation expense totaled $69.7 million, $60.6 million and $38.6 million for the years ended December 31, 2016, 2015 and 2014, respectively, which is included in the depreciation, amortization and accretion expense in the consolidated statements of operations. Depreciation expense amounts have been adjusted by $13.2 million, $15.5 million, and $14.0 million for the years ended December 31, 2016, 2015 and 2014, respectively, to present the Mid-Continent, Bakken Business and Propane Business's operations as discontinued operations. Capitalized interest was $2.7 million, $1.9 million and $0.8 million for the years ended December 31, 2016, 2015 and 2014, respectively.

During the fourth quarter of 2014, management noted the declining commodity markets and related impact on producers and shippers to whom we provide gathering and processing services. The decline in the market price of crude oil led to a corresponding decrease in natural gas and crude oil production impacting the volume of natural gas and NGLs we gather and process on certain assets. As a result, an asset impairment charge of $21.3 million was recorded to reduce the carrying value of the impacted assets to their estimated fair value. The related fair value measurements were based on significant inputs not observable in the market and thus represented Level 3 measurements. Primarily using the income approach, the fair value estimates were based on i) present value of estimated EBITDA, ii) an assumed discount rate of 9.5%, and iii) the expected remaining useful life of the asset groups.
Goodwill and Intangible Assets, Net
Goodwill and Intangible Assets, Net
Goodwill and Intangible Assets, Net

Management performs an annual goodwill assessment at the reporting unit level. We first assess qualitative factors to evaluate whether it is more likely than not that an impairment has occurred and if it is then necessary to perform the two-step goodwill impairment test. The two-step goodwill impairment test involves fair value measurements that are based on significant inputs not observable in the market and thus represent Level 3 measurements. In the two-step assessment, management primarily uses a discounted cash flow analysis, supplemented by a market approach analysis. Key assumptions in the discounted cash flow analysis include an appropriate discount rate, estimated volumes, storage utilization, terminal year multiples, operating costs and maintenance capital expenditures. In estimating cash flows, management incorporates current market information, as well as historical and other factors into the forecast commodity prices and contracted rates used.

As a result of our step one analysis in the fourth quarter of 2015, we determined that the estimated fair value of certain reporting units within our Gas Gathering and Processing Services reportable segment and Liquid Pipelines and Services reportable segment were less than their respective carrying amounts, primarily due to changes in assumptions related to commodity prices, the timing of estimated drilling by producers, and discount rates. These assumptions were adversely impacted by the continuing decline in market conditions within the energy sector at the time.

The second step of the goodwill impairment test involved allocating the estimated fair value of each reporting unit among the assets and liabilities of the reporting unit in a hypothetical purchase price allocation. The results of the hypothetical purchase price allocation indicated there was no fair value attributable to goodwill of the reporting units within our Gas Gathering and Processing Services reportable segment and we recognized an impairment charge of $118.6 million which consisted of $95.0 million and $23.6 million related to the Costar and Lavaca acquisitions, respectively. In addition, we recognized a $29.9 million impairment charge in our Liquid Pipelines and Services reportable segment relating to our Crude Oil Supply and Logistics business and JP Liquids. As a result, we recognized total goodwill impairment charges of $148.5 million during the year ended December 31, 2015. In 2016, we recognized additional goodwill impairment charges totaling $2.7 million related to our JP Liquids business in our Liquid Pipelines and Services reportable segment. Given the market condition trend surrounding JP Liquids, we may recognize further impairments related to those assets in the future. Additionally, we recorded a goodwill impairment charge of $12.8 million in 2016 related to our Pinnacle Propane Express business which is included in net loss from discontinued operations in the consolidated statement of operations.

The following table presents activity in the Partnership's goodwill balance:
 
Gas Gathering and Processing Services
Liquid Pipelines and Services
Terminalling Services
Total
 
 
 
 
 
 
(in thousands)
Balance at January 1, 2015
$
125,974

$
146,219

$
88,466

$
360,659

Goodwill acquired during the year
—

—

—

—

Return of purchase price
(7,382
)
—

—

(7,382
)
Impairment charges
(118,592
)
(29,896
)
—

(148,488
)
Balance at December 31, 2015
—

116,323

88,466

204,789

Impairment charges
—

(2,654
)
—

(2,654
)
Balance at December 31, 2016
$
—

$
113,669

$
88,466

$
202,135



Intangible assets, net, consists of customer relationships, customer contracts, dedicated acreage agreements, and collaborative arrangements as acquired in connection with business combinations. These intangible assets have definite lives and are subject to amortization on a straight-line basis over their economic lives, currently ranging from approximately 5 years to 30 years. Intangible assets, net, consist of the following:
 
December 31,
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
 
Gross carrying amount
 
Accumulated amortization
 
Net carrying amount
 
(in thousands)
Customer relationships
$
106,417

 
$
106,417

 
$
(23,245
)
 
$
(15,535
)
 
$
83,172

 
$
90,882

Customer contracts
94,692

 
94,692

 
(33,228
)
 
(24,388
)
 
61,464

 
70,304

Dedicated acreage
53,350

 
53,350

 
(4,439
)
 
(2,661
)
 
48,911

 
50,689

Collaborative arrangements
11,884

 
11,884

 
(601
)
 
—

 
11,283

 
11,884

Noncompete agreements
1,063

 
1,063

 
(1,000
)
 
(765
)
 
63

 
298

Other
198

 
198

 
(20
)
 
(16
)
 
178

 
182

 
$
267,604

 
$
267,604

 
$
(62,533
)
 
$
(43,365
)
 
$
205,071

 
$
224,239



In connection with the sale of the Mid-Continent Business we recorded an impairment charge of $0.7 million related to customer relationships during the year ended December 31, 2015, which is included in net loss from discontinued operations in the consolidated statement of operations. In addition, as a result of the sale of the Bakken Business, we wrote-off $8.1 million in customer contracts during the year ended December 31, 2014.

For the years ended December 31, 2016, 2015 and 2014, amortization expense on our intangible assets totaled $19.2 million, $20.0 million and $18.4 million, respectively, which is included depreciation, amortization and accretion in the consolidated statements of operations. Amortization expense of $2.9 million, $4.0 million and $4.4 million for the years ended December 31 2016, 2015 and 2014, respectively, relating to the Mid-Continent Business, Bakken Business and Propane Business is included in the net loss from discontinued operations, net of tax, in the consolidated statement of operations.

Estimated amortization expense for each of the next five years ranges from $10.0 million to $15.6 million, with an aggregate $116.5 million to be recognized in subsequent years.

The storage tank capacity in our crude oil storage facility in Cushing, Oklahoma is dedicated to one customer pursuant to a long-term contract with an initial expiration date of August 3, 2017 and an optional two year renewal term. We did not receive a notice of the customer's intent to renew this contract by the required date of February 3, 2017. While we continue to be in discussions with the customer and other parties about renting the storage capacity, we began to accelerate the remaining amortization of the related customer relationship intangible of $10.0 million over the remaining term of the original agreement.
Investment in Unconsolidated Affiliates
Investment in Unconsolidated Affiliates
Investment in Unconsolidated Affiliates

The following table presents activity in the Partnership's investments in unconsolidated affiliates:
 
 
Delta House (1)
 
Emerald Transactions
 
 
 
 
 
 
FPS
 
OGL
 
Destin
 
Tri-States
 
Okeanos
 
Wilprise
 
MPOG
 
Total
 
 
 
 
 
 
(in thousands)
 
 
 
 
 
 
Ownership % at December 31, 2016
20.1
%
 
20.1
%
 
49.7
%
 
16.7
%
 
66.7
%
 
25.3
%
 
66.7
%
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Balance at December 31, 2013
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
Investments
—

 
—

 
—

 
—

 
—

 
—

 
12,000

 
12,000

 
Earnings in unconsolidated affiliates
—

 
—

 
—

 
—

 
—

 
—

 
348

 
348

 
Contributions
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
Distributions
—

 
—

 
—

 
—

 
—

 
—

 
(1,980
)
 
(1,980
)
Balance at December 31, 2014
—

 
—

 
—

 
—

 
—

 
—

 
10,368

 
10,368

 
Investments
40,559

 
25,144

 
—

 
—

 
—

 
—

 
—

 
65,703

 
Earnings in unconsolidated affiliates
5,457

 
2,013

 
—

 
—

 
—

 
—

 
731

 
8,201

 
Contributions
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
Distributions
(12,551
)
 
(4,097
)
 
—

 
—

 
—

 
—

 
(3,920
)
 
(20,568
)
Balance at December 31, 2015
33,465

 
23,060

 
—

 
—

 
—

 
—

 
7,179

 
63,704

 
Investments
55,461

 
3,255

 
122,830

 
56,681

 
27,451

 
5,064

 
—

 
270,742

 
Earnings in unconsolidated affiliates
21,022

 
9,260

 
3,946

 
1,633

 
3,642

 
437

 
218

 
40,158

 
Contributions
—

 
—

 
—

 
—

 
—

 
—

 
429

 
429

 
Distributions
(45,465
)
 
(10,125
)
 
(15,894
)
 
(3,292
)
 
(4,034
)
 
(557
)
 
(3,679
)
 
(83,046
)
Balance at December 31, 2016
$
64,483

 
$
25,450

 
$
110,882

 
$
55,022

 
$
27,059

 
$
4,944

 
$
4,147

 
$
291,987



(1) Represents direct and indirect ownership interests in Class A Units.

The following tables include summarized data for the entities underlying our equity method investments:
 
 
December 31,
 
 
2016
 
2015
 
 
(in thousands)
Current assets
 
$
120,167

 
$
182,264

Non-current assets
 
1,369,492

 
1,418,299

Current liabilities
 
133,085

 
146,490

Non-current liabilities
 
541,312

 
419,215


 
 
Years ended December 31,
 
 
2016
 
2015
 
2014
 
 
(in thousands)
Revenue
 
$
370,263

 
$
235,041

 
$
102,290

Operating expenses
 
99,084

 
90,453

 
72,775

Net income
 
261,200

 
135,083

 
28,173


Our investments in the unconsolidated affiliates underlying the Emerald Transactions were acquired in late April 2016. The following table presents information for each of these affiliates for the portion of 2016 that we held the related investments:

 
Emerald Transactions
 
Destin
 
Tri-States
 
Okeanos
 
Wilprise
Revenues
$
34,360

 
$
25,557

 
$
10,453

 
$
3,306

Net income
8,272

 
15,983

 
1,911

 
2,028

Partnership ownership %
49.7
%
 
16.7
%
 
66.7
%
 
25.3
%
Partnership share of investee net income
4,109

 
2,664

 
1,274

 
513

Basis difference amortization
(163
)
 
(1,031
)
 
2,368

 
(76
)
Earnings in unconsolidated affiliates
3,946

 
1,633

 
3,642

 
437



The unconsolidated affiliates were determined to be variable interest entities due to disproportionate economic interests and decision making rights. In each case, the Partnership lacks the power to direct the activities that most significantly impact the unconsolidated affiliate's economic performance. As the Partnership does not hold a controlling financial interest in these affiliates, the Partnership accounts for its related investments using the equity method. Additionally, the Partnership’s maximum exposure to loss related to each entity is limited to its equity investment as presented on the consolidated balance sheets, as it is not obligated to absorb losses greater than its proportional ownership percentages indicated above. The Partnership’s right to receive residual returns is not limited to any amount less than the ownership percentages indicated above.
Accrued Expenses and Other Current Liabilities
Accounts Expenses and Other Current Liabilities
Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consists of the following (in thousands):
 
 
December 31,
 
 
2016
 
2015
Capital expenditures
 
$
14,274

 
$
7,139

Employee compensation
 
8,438

 
6,198

Convertible preferred unit distributions
 
7,103

 
—

Current portion of asset retirement obligation
 
6,499

 
6,822

Accrued interest
 
5,743

 
1,838

Additional Blackwater acquisition consideration
 
5,000

 
—

Due to related parties
 
4,072

 
3,894

Royalties payable
 
3,926

 
4,163

Transaction costs
 
3,000

 
—

Customer deposits
 
148

 
1

Deferred financing costs
 
2,743

 
—

Taxes payable
 
1,186

 
1,146

Gas imbalances payable
 
1,098

 
413

Other
 
9,491

 
5,646

     Total accrued expenses and other current liabilities
 
$
72,721

 
$
37,260

Asset Retirement Obligations
Asset Retirement Obligations
Asset Retirement Obligations

The following table presents activity in the Partnership's asset retirement obligations (in thousands):
 
Years Ended December 31,
 
2016
 
2015
Beginning balance
$
35,371

 
$
34,645

Liabilities assumed (1)
14,542

 
—

Revision in estimate
230

 
—

Expenditures
(858
)
 
(91
)
Accretion expense
1,577

 
817

Ending balance
50,862

 
35,371

Less: current portion
6,499

 
6,822

Noncurrent asset retirement obligation
$
44,363

 
$
28,549



(1) Includes $14.3 million assumed in connection with the Gulf of Mexico Pipeline acquisition described in Note 2.

We are required to establish security against potential obligations relating to the abandonment of certain transmission assets that may be imposed on the previous owner by applicable regulatory authorities. We have deposited $5.0 million with a third party to secure our performance on these potential obligations. These deposits are included in Restricted cash in our consolidated balance sheets as of December 31, 2016 and 2015.
Convertible Preferred Units
Convertible Preferred Units
Convertible Preferred Units

Our convertible preferred units consist of the following:

 
Series A
 
Series C
 
Series D
 
Units
$
 
Units
$
 
Units
$
 
(in thousands)
December 31, 2013
5,279

$
94,811

 
—

$
—

 
—

$
—

Issuance of units
—

—

 
—

—

 
—

—

Paid in kind unit distributions
466

13,154

 
—

—

 
—

—

December 31, 2014
5,745

107,965

 
—

—

 
—

—

Issuance of units
2,571

44,769

 
—

—

 
—

—

Paid in kind unit distributions
894

16,978

 
—

—

 
—

—

December 31, 2015
9,210

169,712

 
—

—

 
—

—

Issuance of units
—

—

 
8,571

115,457

 
2,333

34,475

Paid in kind unit distributions
897

11,674

 
221

2,772

 
—

—

December 31, 2016
10,107

$
181,386

 
8,792

$
118,229

 
2,333

$
34,475



Affiliates of our General Partner hold and participate in quarterly distributions on our convertible preferred units, with such distributions being made in cash, paid-in-kind units or a combination thereof, at the election of the Board of Directors of our General Partner, although quarterly distribution on our Series D Units will only be paid in cash. The convertible preferred unitholders have the right to receive cumulative distributions in the same priority and prior to any other distributions made in respect of any other partnership interests.

To the extent that any portion of a quarterly distribution on our convertible preferred units to be paid in cash exceeds the amount of cash available for such distribution, the amount of cash available will be paid to our convertible preferred unitholders on a pro rata basis while the difference between the distribution and the available cash will become arrearages and accrue interest until paid.

Series A-1 Convertible Preferred Units

On April 15, 2013, the Partnership, our General Partner and AIM Midstream Holdings entered into agreements with HPIP, pursuant to which HPIP acquired 90% of our General Partner and all of our subordinated units from AIM Midstream Holdings and contributed the High Point System and $15.0 million in cash to us in exchange for 5,142,857 of our Series A-1 Units.
The Series A-1 Units receive distributions prior to distributions to our common unitholders. The distributions on the Series A-1 Units are equal to the greater of $0.50 per unit or the declared distribution to common unitholders. The Series A-1 Units may be converted into common units on a one-to-one basis, subject to customary anti-dilutive adjustments, at the option of the unitholders on or any time after January 1, 2014. As of December 31, 2016, the conversion price is $15.87.

Upon any liquidation and winding up of the Partnership or the sale of substantially all of its assets, the holders of Series A-1 Units will generally be entitled to receive, in preference to the holders of any of the Partnership's other equity securities, but in parity with all convertible preferred units, an amount equal to the sum of $15.87 multiplied by the number of Series A-1 Units owned by such holders, plus all accrued but unpaid distributions on such Series A Units.

Prior to the consummation of any recapitalization, reorganization, consolidation, merger, spin-off or other business combination in which the holders of common units are to receive securities, cash or other assets (a "Partnership Event"), we are obligated to make an irrevocable written offer, subject to consummation of the Partnership Event, to each holder of Series A Units to redeem all (but not less than all) of such holder's Series A-1 Units for a per unit price payable in cash as described in the Partnership Agreement.

Upon receipt of such a redemption offer from us, each holder of Series A-1 Units may elect to receive such cash amount or a preferred security issued by the person surviving or resulting from such Partnership Event and containing provisions substantially equivalent to the provisions set forth in the Partnership Agreement with respect to the Series A-1 Units without material abridgement.

Except as provided in the Partnership Agreement, the Series A-1 Units have voting rights that are identical to the voting rights of the common units and will vote with the common units as a single class, with each Series A-1 Unit entitled to one vote for each common unit into which such Series A-1 Unit is convertible.

As conversion is at the option of the holder and redemption is contingent upon a future event which is outside the control of the Partnership, the Series A-1 Units have been classified as mezzanine equity in the consolidated balance sheets.

Under the Partnership Agreement, distributions on Series A-1 Units were made with paid-in-kind Series A-1 Units, cash or a combination thereof, at the discretion of the Board of Directors, through the distribution for the quarter ended March 31, 2016. The Partnership was previously required to pay distributions on the Series A-1 Units with a combination of paid-in-kind units and cash. The sale of the Series A-1 Units was exempt from registration under Securities Act pursuant to Rule 4(a)(2) under the Securities Act.

Series A-2 Convertible Preferred Units

On March 30, 2015 and June 30, 2015, we entered into two Series A-2 Convertible Preferred Unit Purchase Agreements with Magnolia Infrastructure Partners ("Magnolia") an affiliate of HPIP pursuant to which the Partnership issued, in separate private placements, newly-designated Series A-2 Units (the “Series A-2 Units”) representing limited partnership interests in the Partnership. As a result, the Partnership issued a total of 2,571,430 Series A-2 Units for approximately $45.0 million in aggregate proceeds during the year ended December 31, 2015. The Series A-2 Units will participate in distributions of the Partnership along with common units in a manner identical to the existing Series A-1 Units (together with the Series A-2 Units, the "Series A Units"), with such distributions being made in cash or with paid-in-kind Series A Units at the election of the Board of Directors of our General Partner.

On July 27, 2015, we amended our Partnership Agreement to grant us the right (the “Call Right”) to require the holders of the Series A-2 Units to sell, assign and transfer all or a portion of the then outstanding Series A-2 Units to us for a purchase price of $17.50 per Series A-2 Unit (subject to appropriate adjustment for any equity distribution, subdivision or combination of equity interests in the Partnership). We may exercise the Call Right at any time, in connection with our or our affiliate’s acquisition of assets or equity from ArcLight Energy Partners Fund V, L.P., or one of its affiliates, for a purchase price in excess of $100 million. We may not exercise the Call Right with respect to any Series A-2 Units that a holder has elected to convert into common units on or prior to the date we have provided notice of our intent to exercise the Call Right, and we may also not exercise the Call Right if doing so would result in a default under any of our or our affiliates’ financing agreements or obligations. As of December 31, 2016, the conversion price is $15.87. The sale of the Series A-2 Units was exempt from registration under Securities Act pursuant to Rule 4(a)(2) under the Securities Act.

Series C Convertible Preferred Units

On April 25, 2016, the Partnership issued 8,571,429 of its Series C Units to an ArcLight affiliate in connection with the Emerald Transactions described in Note 2.

The Series C Units have voting rights that are identical to the voting rights of the common units and will vote with the common units as a single class on an as converted basis, with each Series C Unit initially entitled to one vote for each common unit into which such Series C Unit is convertible. The Series C Units also have separate class voting rights on any matter, including a merger, consolidation or business combination, that adversely affects, amends or modifies any of the rights, preferences, privileges or terms of the Series C Units. The Series C Units are convertible in whole or in part into common units at any time. The number of common units into which a Series C Unit is convertible will be an amount equal to the sum of $14.00 plus all accrued and accumulated but unpaid distributions, divided by the conversion price. The sale of the Series C Units was exempt from registration under Securities Act pursuant to Rule 4(a)(2) under the Securities Act.

In the event that the Partnership issues, sells or grants any common units or convertible securities at an indicative per common unit price that is less than $14.00 per common unit (subject to customary anti-dilution adjustments), then the conversion price will be adjusted according to a formula to provide for an increase in the number of common units into which Series C Units are convertible. As of December 31, 2016, the conversion price is $13.95.

Prior to consummating any recapitalization, reorganization, consolidation, merger, spin-off or other business combination in which the holders of common units are to receive securities, cash or other assets, we are obligated to make an irrevocable written offer, subject to consummating the Partnership Event, to the holders of Series C Units to redeem all (but not less than all) of the Series C Units for a price per Series C Unit payable in cash as described in the Partnership Agreement.

Upon receipt of a redemption offer, each holder of Series C Preferred Units may elect to receive the cash amount or a preferred security issued by the person surviving or resulting from the Partnership Event and containing provisions substantially equivalent to the provisions set forth in the Fifth Amended and Restated Partnership Agreement with respect to the Series C Preferred Units without material abridgement.

Upon any liquidation and winding up of the Partnership or the sale of substantially all of the assets of the Partnership, the holders of Series C Units generally will be entitled to receive, in preference to the holders of any of the Partnership's other equity securities but in parity with all convertible preferred units, an amount equal to the sum of the $14.00 multiplied by the number of Series C Units owned by such holders, plus all accrued but unpaid distributions.

At any time prior to April 25, 2017, the Partnership has the right (the “Series C Call Right”) to require the holders of the Series C Units to sell, assign and transfer all or a portion of the then outstanding Series C Units for a purchase price of $14.00 per Series C Unit (subject to customary anti-dilution adjustments), plus all accrued but unpaid distributions on each Series C Unit.

The Partnership may not exercise the Series C Call Right if the holder has elected to convert it into common units on or prior to the date the Partnership has provided notice of its intent to exercise its Series C Call Right, and may not exercise the Series C Call Right if doing so would violate applicable law or result in a default under any financing agreement or obligation of the Partnership or its affiliates.

In connection with the issuance of the Series C Units, the Partnership issued the holders a warrant to purchase up to 800,000 common units at an exercise price of $7.25 per common unit (the "Series C Warrant"). The Series C Warrant is subject to standard anti-dilution adjustments and is exercisable for a period of seven years.

On April 25, 2017, the number of common units that may be purchased pursuant to the exercise of the Series C Warrant will be adjusted by an amount, rounded to the nearest whole common unit, equal to the product obtained by the following calculation: (i) 400,000 multiplied by (ii) (A) the Series C Issue Price multiplied by the number of Series C Units then outstanding less $45.0 million divided by (B) the Series C Issue Price multiplied by the number of Series C Units issued, less $45.0 million.

Any Series C Units issued in-kind as a distribution to holders of Series C Units (“Series C PIK Units”) will increase the number of common units that can be purchased upon exercise of the Series C Warrant by an amount, rounded to the nearest whole common unit, equal to the product obtained by the following calculation: (i) the total number of common units into which each Series C Warrant may be exercised immediately prior to the most recent issuance of the Series C PIK Units multiplied by (ii) (A) the total number of outstanding Series C Units immediately after the most recent issuance of Series C PIK Units divided by (B) the total number of outstanding Series C Units immediately prior to the most recent issuance of Series C PIK Units.

The fair value of the Series C Warrant was determined using a market approach that utilized significant inputs which are not observable in the market and thus represent a Level 3 measurement as defined by ASC 820. The estimated fair value of $4.41 per warrant unit was determined using a Black-Scholes model and the following significant assumptions: i) a dividend yield of 18%, ii) common unit volatility of 42% and iii) the seven-year term of the warrant to arrive at an aggregate fair value of $4.5 million.

Series D Convertible Preferred Units

On October 31, 2016, Partnership issued 2,333,333 shares of its newly-designated Series D Units to an ArcLight affiliate at a price of $15.00 per unit, less a 1.5% closing fee, in connection with the Delta House transaction described in Note 2. The related agreement provides that if any of the Series D Units remain outstanding on June 30, 2017, the Partnership will issue the holder of the Series D Units a warrant (the “Series D Warrant”) to purchase 700,000 common units representing limited partnership interests with an exercise price of $22.00 per common unit. The fair value of the conditional Series D Warrant at the time of issuance was immaterial.

The Series D Units are entitled to quarterly distributions payable in arrears equal to the greater of $0.4125 and the cash distribution that the Series D Units would have received if they had been converted to common units immediately prior to the beginning of the quarter. The Series D Units also have separate class voting rights on any matter, including a merger, consolidation or business combination, that adversely affects, amends or modifies any of the rights, preferences, privileges or terms of the Series D Units. The Series D Units are convertible in whole or in part into common units at the election of the holder of the Series D Unit at any time after June 30, 2017. As of the date of issuance, the conversion rate for each Series D Unit was one -to-one (the “Conversion Rate”). As of December 31, 2016, the conversion price is $14.98.

In the event that the Partnership issues, sells or grants any common units or securities convertible into common units at an indicative per common unit price that is less than $15.00 per unit (subject to customary anti-dilution adjustments), then the Conversion Rate will be adjusted according to a formula to provide for an increase in the number of common units into which Series D Units are convertible.

Prior to the consummation of any recapitalization, reorganization, consolidation, merger, spin-off or other business combination in which the holders of Common Units are to receive securities, cash or other assets (a “Partnership Event”), the Partnership is obligated to make an irrevocable written offer, subject to consummation of the Partnership Event, to the holders of Series D Units to redeem all (but not less than all) of the Series D Units for a price per Series D Unit payable in cash as described in the Partnership Agreement. The sale of the Series D Units was exempt from registration under Securities Act pursuant to Rule 4(a)(2) under the Securities Act.

Upon receipt of a redemption offer, each holder of Series D Units may elect to receive the cash amount or a preferred security issued by the person surviving or resulting from the Partnership Event.

Upon any liquidation and winding up of the Partnership or the sale of substantially all of the assets of the Partnership, the holders of Series D Units generally will be entitled to receive, in preference to the holders of any of the Partnership's other equity securities but in parity with all convertible preferred units, an amount equal to the sum of the $15.00 multiplied by the number of Series D Units owned by such holders, plus all accrued but unpaid distributions.

At any time prior to June 30, 2017, the Partnership has the right (the “Series D Call Right”) to redeem the Series D Units for the product of (i) the sum of $15.00 and all accrued and accumulated but unpaid distributions for each Series D Unit (including a proportionate amount of the distribution on each Series D Unit that has accrued for the quarter in which the redemption occurs); and (ii) 1.03.
Debt Obligations
Debt Obligations
Debt Obligations

Our outstanding debt consists of the following as of December 31, 2016:
 
AMID
 
JPE
 
8.5% Senior
 
3.77% Senior
 
 
 
 
 
Revolving Credit
 
Revolving Credit
 
Notes due
 
Notes due
 
Other
 
 
 
 Agreement (1)
 
 Agreement (1)
 
2021
 
2031
 
Debt
 
Total
 
(in thousands)
Balance
$
711,250

 
$
177,000

 
$
300,000

 
$
60,000

 
$
3,762

 
$
1,252,012

Less unamortized deferred financing costs and discount
—

 
—

 
(8,691
)
 
(2,345
)
 
—

 
(11,036
)
  Subtotal
711,250

 
177,000

 
291,309

 
57,655

 
3,762

 
1,240,976

Less current portion
—

 
—

 
—

 
(1,676
)
 
(3,762
)
 
(5,438
)
  Non-current portion
$
711,250

 
$
177,000

 
$
291,309

 
$
55,979

 
$
—

 
$
1,235,538



Our outstanding debt consists of the following as of December 31, 2015:
 
AMID
 
JPE
 
 
 
 
 
Revolving Credit
 
Revolving Credit
 
Other
 
 
 
 Agreement (1)
 
 Agreement (1)
 
Debt
 
Total
 
(in thousands)
Balance
$
525,100

 
$
162,000

 
$
3,498

 
$
690,598

Less current portion
—

 
—

 
(2,758
)
 
(2,758
)
  Non-current portion
$
525,100

 
$
162,000

 
$
740

 
$
687,840


______________________
(1) Unamortized deferred financing costs related to the Credit Agreement are included in Other assets, net.

AMID Credit Agreement

Effective as of April 25, 2016, the Partnership entered into the Second Amendment to the Amended and Restated Credit Agreement (as amended, the "Credit Agreement"), which provides for maximum borrowings up to $750.0 million, with the ability to further increase the borrowing capacity to $900.0 million subject to lender approval. We can elect to have loans under our Credit Agreement bear interest either at a Eurodollar-based rate, plus a margin ranging from 2.00% to 3.25% depending on our total leverage ratio then in effect, or a base rate which is a fluctuating rate per annum equal to the highest of (i) the Federal Funds Rate plus 0.50%, (ii) the rate of interest in effect for such day as publicly announced from time to time by Bank of America as its "prime rate," or (iii) the Eurodollar Rate plus 1.00% plus a margin ranging from 1.00% to 2.25% depending on the total leverage ratio then in effect. We also pay a commitment fee of 0.50% per annum on the undrawn portion of the revolving loan under the Credit Agreement.

Our obligations under the Credit Agreement are secured by a lien on substantially all of our assets. Advances made under the Credit Agreement are guaranteed on a senior unsecured basis by certain of our subsidiaries (the “Guarantors”). These guarantees are full and unconditional and joint and several among the Guarantors. The terms of the Credit Agreement include covenants that restrict our ability to make cash distributions and acquisitions in some circumstances. The remaining principal balance and any accrued and unpaid interest will be due and payable in full at maturity, on September 5, 2019.

On September 30, 2016, in connection with the 3.77% Senior Note Purchase Agreement described, the Partnership entered into the Limited Waiver and Third Amendment to the Credit Agreement, which among other things, (i) allows Midla Holdings (as defined below), for so long as the 3.77% Senior Notes are outstanding, to be excluded from guaranteeing the obligations under the Credit Agreement and being subject to certain convents thereunder, (ii) releases the lien granted under the original credit agreement on D-Day’s equity interests in Delta House FPS, LLC, and (iii) deems the equity interests in Delta House FPS, LLC to be excluded property under the Credit Agreement. All other terms under the Credit Agreement remain the same.

On November 18, 2016, the Partnership entered into the Fourth Amendment to the Amended and Restated Credit Agreement. The Fourth Amendment (i) modifies certain investment covenants to reflect the recently completed incremental acquisition of additional interests in Delta House Class A Units (ii) permits JPE’s existing credit facility (the “JPE Credit Facility”) to remain in place during the time period between (a) the consummation of the JPE Merger and (b) the payoff of the JPE Credit Facility, (iii) permits the joining of JPE and its subsidiaries as guarantors under the Credit Agreement, and (iv) permits the integration of JPE and its subsidiaries into the Partnership’s ownership structure.

The Credit Agreement contains certain financial covenants, including a consolidated total leverage ratio which requires our indebtedness not to exceed 4.75 times adjusted consolidated EBITDA for the prior twelve month period adjusted in accordance with the Credit Agreement (except for the current and subsequent two quarters after the consummation of a permitted acquisition, at which time the covenant is increased to 5.25 times adjusted consolidated EBITDA) and a minimum interest coverage ratio that requires our adjusted consolidated EBITDA to exceed consolidated interest charges by not less than 2.50 times. The financial covenants in our Credit Agreement may limit the amount available to us for borrowing to less than $750.0 million. In addition to the financial covenants described above, the Credit Agreement also contains customary representations and warranties (including those relating to organization and authorization, compliance with laws, absence of defaults, material agreements and litigation) and customary events of default (including those relating to monetary defaults, covenant defaults, cross defaults and bankruptcy events).

For the years ended December 31, 2016, 2015 and 2014, the weighted average interest rate on borrowings under our Credit Agreement was approximately 4.29%, 3.67%, and 3.80%, respectively.

As of December 31, 2016, our consolidated total leverage ratio was 4.07 and our interest coverage ratio was 7.43, which were both in compliance with the related requirements of our Credit Agreement. At December 31, 2016 and 2015, letters of credit outstanding under the Credit Agreement were $7.4 million and $1.8 million, respectively. As of December 31, 2016, we had approximately $711.3 million of borrowings and $7.4 million of letters of credit outstanding under the Credit Agreement resulting in $31.3 million of available borrowing capacity.

As of December 31, 2016, we were in compliance with the covenants included in the Credit Agreement. Our ability to maintain compliance with the leverage and interest coverage ratios included in the Credit Agreement may be subject to, among other things, the timing and success of initiatives we are pursuing, which may include expansion capital projects, acquisitions, or drop down transactions, as well as the associated financing for such initiatives.  

The carrying value of amounts outstanding under the Credit Agreement approximates the related fair value, as interest charges vary with market rates conditions. On March 8, 2017, the Partnership entered into the Second Amended and Restated Credit Agreement, which increased our borrowing capacity from $750.0 million to $900.0 million and provided for an accordion feature that will permit, subject to the customary conditions, the borrowing capacity under the facility to be increased to a maximum of $1.1 billion.

JPE Credit Agreement

On February 12, 2014, we entered into the JPE Credit Agreement with Bank of America, N.A, which was available for refinancing and repayment of certain existing indebtedness, working capital, capital expenditures, permitted acquisitions and other general partnership purposes. The JPE Credit Agreement consisted of a $275.0 million revolving loan, which included a sub-limit of up to $100.0 million for letters of credit. The JPE Credit Agreement was scheduled to mature on February 12, 2019, but was paid off and terminated on March 8, 2017 in connection with the Partnership's acquisition of JPE.

Borrowings under the JPE Credit Agreement bore interest at a rate per annum equal to, at out option, either (a) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.5%, (2) the prime rate of Bank of America, and (3) LIBOR, subject to certain adjustments, plus 1.00% or (b) LIBOR, in each case plus an applicable rate. The applicable rate was (a) 1.25% for prime rate borrowing and 2.25% for LIBOR borrowings. The commitment fee was subject to an adjustment each quarter based in the Consolidated Net Total Leverage Ratio, as defined in the related agreement. The carrying value of amounts outstanding under the JPE Credit Agreement approximates the related fair value, as interest charges vary with market rates conditions.

8.50% Senior Notes

On December 28, 2016, the Partnership and American Midstream Finance Corporation, our wholly-owned subsidiary (the “Co-Issuer” and together with the Partnership, the “Issuers”), completed the issuance and sale of the 8.50% Senior Notes. The 8.50% Senior Notes are jointly and severally guaranteed by the Partnership’s existing direct and indirect wholly owned subsidiaries (other than the Co-Issuer) and certain of the Partnership’s future subsidiaries (the “Guarantors”). The 8.50% Senior Notes rank equal in right of payment with all existing and future senior indebtedness of the Issuers, and senior in right of payment to any future subordinated indebtedness of the Issuers. The 8.50% Senior Notes were issued at par and provided approximately $294.0 million in proceeds, after deducting the initial purchasers' discount of $6.0 million. This amount was deposited into escrow pending completion of the JPE Merger and is included in Restricted cash on our consolidated balance sheets as of December 31, 2016. The Partnership also incurred $2.7 million of direct issuance costs resulting in net proceeds related to the 8.50% Senior Notes of $291.3 million.

Upon the closing of the JPE Merger and the satisfaction of other conditions related thereto, the restricted cash was released from escrow and was used to repay the JPE Credit Facility and to reduce borrowings under the Partnership’s Credit Agreement.
 
The 8.50% Senior Notes will mature on December 15, 2021 with interest payable in arrears on June 15 and December 15, commencing June 15, 2017.

At any time prior to December 15, 2018, the Issuers may redeem up to 35% of the aggregate principal amount of 8.50% Senior Notes, at a redemption price of 108.50% of the principal amount, plus accrued and unpaid interest to the redemption date, in an amount not greater than the net cash proceeds of one or more equity offerings by the Partnership, provided that:

•
at least 65% of the aggregate principal amount of the 8.50% Senior Notes remains outstanding immediately after such redemption (excluding 8.50% Senior Notes held by the Partnership and its subsidiaries); and

•
the redemption occurs within 180 days of the closing of each such equity offering.

Prior to December 15, 2018, the Issuers may redeem all or part of the 8.50% Senior Notes, at a redemption price equal to the sum of:

•
the principal amount thereof, plus

•
the make whole premium (as defined in the Indenture) at the redemption date, plus

•
accrued and unpaid interest, to the redemption date.

On and after December 15, 2018, the Issuers may redeem all or a part of the 8.50% Senior Notes, at the redemption prices (expressed as percentages of principal amount) set forth below, plus accrued and unpaid interest, if redeemed during the twelve-month period beginning on December 15 of the years indicated below:
Year
Percentage
2018
104.250%
2019
102.125%
2020 and thereafter
100.000%

The Indenture restricts the Partnership’s ability and the ability of certain of its subsidiaries to, among other things: (i) incur, assume or guarantee additional indebtedness, issue any disqualified stock or issue preferred units, (ii) create liens to secure indebtedness, (iii) pay distributions on equity securities, redeem or repurchase equity securities or redeem or repurchase subordinated securities, (iv) make investments, (v) restrict distributions, loans or other asset transfers from restricted subsidiaries, (vi) consolidate with or merge with or into, or sell substantially all of its properties to, another person, (vii) sell or otherwise dispose of assets, including equity interests in subsidiaries, (viii) enter into transactions with affiliates, (ix) engage in certain business activities and (x) enter into sale and leaseback transactions. These covenants are subject to a number of important exceptions and qualifications. If at any time the 8.50% Senior Notes are rated investment grade by either Moody’s Investors Service, Inc. or Standard & Poor’s Ratings Services and no Default or Event of Default (as each are defined in the Indenture) has occurred and is continuing, many of such covenants will terminate and the Partnership and its subsidiaries will cease to be subject to such covenants.
The carrying value of the 8.50% Senior Notes as of December 31, 2016 approximates the related fair value as of that date as the Senior Notes were issued on December 28, 2016.

3.77% Senior Notes

On September 30, 2016, Midla Financing, LLC ("Midla Financing"), American Midstream (Midla), LLC (“Midla”), and Mid Louisiana Gas Transmission LLC ("MLGT" and together with Midla, the "Note Guarantors") entered into a Note Purchase and Guaranty Agreement with certain institutional investors (the “Purchasers”) whereby Midla Financing issued $60.0 million in aggregate principal amount of 3.77% Senior Notes due June 30, 2031. Principal and interest on the 3.77% Senior Notes is payable in installments on the last business day of each quarter beginning June 30, 2017 with the remaining balance payable in full on June 30, 2031. The average quarterly principal payment is approximately $1.1 million. The 3.77% Senior Notes were issued at par and provided net proceeds of approximately $57.7 million after deducting related issuance costs of $2.3 million.

Net proceeds from the 3.77% Senior Notes are restricted and will be used to fund project costs incurred in connection with the construction of the Midla-Natchez Line, the retirement of Midla’s existing 1920’s pipeline, the move of our Baton Rouge operations to the MLGT system, and the reconfiguration of the DeSiard compression system and all related ancillary facilities. These proceeds can also be used to pay costs incurred in connection with the issuance of the 3.77% Senior Notes, and for general corporate purposes of Midla Financing. As of December 31, 2016, Restricted cash includes $24.5 million from the issuance of the 3.77% Senior Notes.

The Note Purchase Agreement includes customary representations and warranties, affirmative and negative covenants (including financial covenants), and events of default that are customary for a transaction of this type. Midla Financing must maintain a debt service reserve account containing six months of principal and interest payments, and Midla Financing and the Note Guarantors (including any entities that become guarantors under the terms of the 3.77% Senior Note Purchase Agreement) are restricted from making distributions until June 30, 2017, unless the debt service coverage ratio is not less than, and is not projected to be for the following 12 calendar months less than, 1.20:1.00, and unless certain other requirements are met.

In connection with the 3.77% Senior Note Purchase Agreement, the Note Guarantors guaranteed the payment in full of all Midla Financing’s related obligations. Also, Midla Financing and the Note Guarantors granted a security interest in substantially all of their tangible and intangible personal assets, including the membership interests in each Note Guarantor held by Midla Financing, and Midla Holdings pledged the membership interests in Midla Financing to the Collateral Agent.

As of December 31, 2016, the fair value of the 3.77% Senior Notes was $54.6 million. This estimate was based on similar private placement transactions along with changes in market interest rates which represent a Level 2 measurement.
Partners' Capital
Partners' Capital
Partners' Capital

American Midstream Outstanding Units

The following table presents unit activity (in thousands):

 
 
General
Partner Interest
 
Limited Partner Interest
 
Series B Convertible Units
 
JPE Series D Units
Balances at December 31, 2013
 
185

 
13,394

 
—

 
—

Initial issuance of Series B Units
 
—

 
—

 
1,168

 
 
Issuance of Series B Units
 
—

 
—

 
87

 
 
Issuance of JPE Series D Units
 
—

 
—

 
—

 
1,008

Redemption of JPE Series D Units
 
—

 
—

 
—

 
(1,008
)
LTIP vesting
 
—

 
80

 
—

 
 
Issuance of GP units
 
207

 
—

 
—

 
 
Exercise of warrants
 
—

 
300

 
—

 
 
Issuance of common units in JP Development transaction
 
—

 
5,841

 
—

 
 
Issuance of common units
 
—

 
23,025

 
—

 
 
Balances at December 31, 2014
 
392

 
42,640

 
1,255

 
—

Issuance of Series B Units
 
—

 
—

 
95

 
—

LTIP vesting
 
—

 
58

 
—

 
—

Exercise of unit options
 
—

 
152

 
—

 
—

Issuance of GP units
 
144

 
—

 
—

 
—

Issuance of common units
 
—

 
7,654

 
—

 
—

Balances at December 31, 2015
 
536

 
50,504

 
1,350

 
—

Conversion of Series B Units
 
—

 
1,350

 
(1,350
)
 
—

Return of escrow units
 
—

 
(1,034
)
 
—

 
—

LTIP vesting
 
—

 
283

 
—

 
—

Issuance of GP units
 
144

 
—

 
—

 
—

Issuance of common units
 
—

 
248

 
—

 
—

Balances at December 31, 2016
 
680

 
51,351

 
—

 
—



Our capital accounts are comprised of approximately 1.3% notional General Partner interest and 98.7% limited partner interests as of December 31, 2016. Our limited partners have limited rights of ownership as provided for under our Partnership Agreement and the right to participate in our distributions. Our General Partner manages our operations and participates in our distributions, including certain incentive distributions pursuant to the incentive distribution rights that are non-voting limited partner interests held by our General Partner. Pursuant to our Partnership Agreement, our General Partner participates in losses and distributions based on its interest. The General Partner's participation in the allocation of losses and distributions is not limited and therefore, such participation can result in a deficit to its respective capital account. As such, allocation of losses and distributions for previous transactions between entities under common control have resulted in a deficit to the General Partner's capital account included in our consolidated balance sheets.

Series B Convertible Preferred Units

Effective January 31, 2014, the Partnership issued 1,168,225 Series B Units to its General Partner in exchange for approximately $30.0 million to fund a portion of the Lavaca acquisition described in Note 2. The Series B Units participated in distributions of the Board of Directors of our General Partner along with common units, with such distributions being made in cash distributions or with paid-in-kind Series B Units at the election of the Partnership. The Series B Units were issued in a private placement in reliance upon an exemption from the registration requirements of the Securities Act of 1933 pursuant to Section 4(a)(2) thereof and the safe harbor provided by Rule 506 of Regulation D promulgated thereunder. On February 1, 2016, all outstanding Series B Units were converted on a one-for-one basis into common units.

The Board of Directors of our General Partner elected to pay the Series B distributions using paid-in-kind Series B Units. For the years ended December 31, 2015 and 2014, the Partnership issued 94,923 and 86,461, respectively, of paid-in-kind Series B Units with a fair value of $1.4 million and $2.2 million, respectively.

Equity Offerings

In October 2015, the Partnership and certain of its affiliates entered into an agreement with a group of investment banks under which it may issue up to $100.0 million of its common units in at the market (“ATM”) offerings. During 2016, the Partnership issued 248,561 common units under this program resulting in net proceeds of $2.9 million after deducting related offering costs of $0.3 million. The net proceeds were used to repay amounts outstanding under the Credit Agreement. At December 31, 2016, $96.8 million remained available under the ATM program.

In September 2015, the Partnership sold 7,500,000 of its common units in a public offering at a price to the public of $11.31 per common unit. The net proceeds of approximately $81.0 million were used to fund a portion of the Delta House investment described in Note 2. In October 2016, the Partnership issued an additional 151,937 common units at a price of $11.31 per unit pursuant to the partial exercise of the underwriters' overallotment option, resulting in net proceeds of approximately $1.7 million.

In October 2014, the Partnership acquired Costar from Energy Spectrum Partners VI LP and Costar Midstream Energy, LLC which was funded, in part, with 6,892,931 of common units with an estimated fair value of $147.3 million issued directly to Energy Spectrum and Costar Midstream Energy LLC. In February 2016, the Partnership reached a settlement of certain indemnification claims with the Costar sellers whereby approximately 1,034,483 common units held in escrow were returned to the Partnership.

On October 7, 2014, JPE issued 7,940,625 common units at a price of $34.63 per unit in its initial public offering ("IPO") resulting in net proceeds of $252.7 million. Immediately prior to the IPO, JPE was recapitalized and common units were issued for each previously outstanding class of equity, resulting in 11,848,735 outstanding common units immediately prior to the IPO.

On August 15, 2014, the Partnership sold 4,622,352 of its common units representing limited partner interests to institutional investors at a price of $25.8075 per common unit resulting in net proceeds of $119.3 million.

On February 12, 2014, we issued 190,000 Class A Common Units to an affiliate for net proceeds of $8.0 million.

On March 28, 2014, we issued 1,008,000 Series D Preferred Units to an affiliate resulting in net proceeds of $40.0 million. On October 7, 2014, we redeemed all of the outstanding Series D Preferred Units for $42.4 million.

In January 2014, the Partnership sold 3,400,000 of its common units in a public offering at a price of $26.75 per common unit. The Partnership used the net proceeds of $86.9 million to fund a portion of the Lavaca acquisition described in Note 2.

General Partner Units

In order to maintain its ownership percentage, we received proceeds of $2.0 million from our General Partner as consideration for the issuance of 143,900 additional notional general partner units for the year ended December 31, 2016, proceeds of $1.9 million for the issuance of 143,517 additional notional general partner units for the year ended December 31, 2015 and proceeds of $5.7 million for the issuance of 206,810 additional notional general partner units for the year ended December 31, 2014.
Distributions

We made the following distributions (in thousands):
 
 
Years Ended December 31,
 
 
2016
 
2015
 
2014
Series A Units
 
 
 
 
 
 
Cash:
 
 
 
 
 
 
Paid
 
$
4,935

 
$
—

 
$
2,658

Accrued
 
2,514

 
—

 
—

Paid-in-kind units
 
11,674

 
16,978

 
13,154

Total
 
19,123

 
16,978

 
15,812

 
 
 
 
 
 
 
Series B Units
 
 
 
 
 
 
Paid-in-kind units
 
—

 
1,373

 
2,220

Total
 
—

 
1,373

 
2,220

 
 
 
 
 
 
 
Series C Units
 
 
 
 
 
 
Cash:
 
 
 
 
 
 
Paid
 
3,089

 
—

 
—

Accrued
 
3,626

 
—

 
—

Paid-in-kind units
 
2,772

 
—

 
—

Total
 
9,487

 
—

 
—

 
 
 
 
 
 
 
Series D Units
 
 
 
 
 
 
AMID Series D Units Accrued
 
963

 
—

 
—

     JPE Series D Units Paid-in-kind units
 
—

 
—

 
2,436

Total
 
963

 
—

 
2,436

 
 
 
 
 
 
 
Limited Partner Units
 
 
 
 
 
 
Cash:
 
 
 
 
 
 
Paid
 
101,561

 
93,622

 
114,612

Accrued
 
—

 
—

 
—

Total
 
101,561

 
93,622

 
114,612

 
 
 
 
 
 
 
General Partner Units
 
 
 
 
 
 
Cash:
 
 
 
 
 
 
Paid
 
2,551

 
6,789

 
2,695

Accrued
 
—

 
—

 
—

Additional Blackwater acquisition consideration
 
5,000

 
—

 
—

Total
 
7,551

 
6,789

 
2,695

 
 
 
 
 
 
 
Summary
 
 
 
 
 
 
Cash
 
 
 
 
 
 
Paid
 
112,136

 
100,411

 
119,965

Accrued
 
7,103

 
—

 
—

Paid-in-kind units
 
14,446

 
18,351

 
17,810

Additional Blackwater acquisition consideration
 
5,000

 
—

 
—

Total
 
$
138,685

 
$
118,762

 
$
137,775


On January 26, 2017, the Board of Directors of our General Partner declared a quarterly cash distribution of $0.4125 per common unit or $1.65 per common unit on an annualized basis. The distribution was paid on February 13, 2017, to unitholders of record as of the close of business on February 6, 2017. Accrued cash distributions on our preferred convertible units were also paid in February 2017.

The fair value of the paid-in-kind distributions was determined using the market and income approaches, requiring significant inputs which are not observable in the market and thus represent a Level 3 measurements as defined by ASC 820. Under the income approach, the fair value estimates for all years presented were based on i) present value of estimated future contracted distributions, ii) option values ranging from $0.02 per unit to $9.68 per unit using a Black-Scholes model, iii) assumed discount rates ranging from 5.57% to 10.0% and iv) assumed growth rates of 1.0%.

The Fourth Amended and Restated Agreement of Limited Partnership provides that the General Partner may, in its sole discretion, make cash distributions, but there is no requirement that we make any cash distributions.
Net Income (Loss) per Limited Partner Unit
Net Income (Loss) per Limited Partner Unit
Net Income (Loss) per Limited Partner Unit

Net income (loss) is allocated to the General Partner and the limited partners in accordance with their respective ownership percentages, after giving effect to distributions on our convertible preferred units and General Partner units, including incentive distribution rights. Unvested unit-based compensation awards that contain non-forfeitable rights to distributions (whether paid or unpaid) are classified as participating securities and are included in our computation of basic and diluted net limited partners' net income (loss) per common unit. Basic and diluted limited partners' net income (loss) per common unit is calculated by dividing limited partners' interest in net income (loss) by the weighted average number of outstanding limited partner units during the period.

As of December 31, 2016, JPE had approximately 36.7 million common and subordinated units outstanding. Additionally, as of that date, ArcLight owned approximately 18.7 million, or 50.9%, of those units while other unitholders owned approximately 18.0 million or 49.1% of those units. In order to affect the JPE Merger, the Partnership issued .5225 of a Partnership common unit for each JPE unit held by ArcLight Capital or approximately 9.8 million units and .5775 of a Partnership common unit for each JPE unit held by other unitholders or approximately 10.4 million units. The Partnership issued a total of 20.2 million units to affect the JPE Merger.

In order to determine the weighted average number of units outstanding for purposes of calculating limited partner earnings per unit in the consolidated statements of operations, the Partnership’s historical weighted average number of units outstanding for each year was added to an assumed weighted average number of JPE units outstanding after applying the applicable exchange ratios mentioned previously. JPE’s common units were not publicly traded until October 7, 2014, when it completed its IPO. Concurrent with its IPO, JPE completed an equity restructuring whereby it converted its previously outstanding equity interests into approximately 22.7 million common and subordinated units.

For the year ended December 31, 2014, the applicable exchange ratios were applied to the 22.7 million of JPE common and subordinated units resulting from the previously mentioned equity restructuring as if such units were outstanding for the entire year, plus the 13.8 million common units issued in connection with JPE’s IPO on October 7, 2014 as if such units were outstanding for approximately 25% of the year. The aggregate amount was then added to the Partnership’s actual weighted average number of units outstanding for the year to arrive at the weighted average number of units outstanding for the year.

For the years ended December 31, 2015 and 2016, the applicable exchange ratios were applied to JPE’s actual weighted average number of units outstanding for the respective periods and such amounts were added to the Partnership’s actual weighted average number of units outstanding for the respective periods to arrive at the weighted average number of units outstanding for the respective periods.

The calculation of basic and diluted limited partners' net loss per common unit is summarized below (in thousands, except per unit amounts):

 
Years Ended December 31,
 
2016
 
2015
 
2014
Net loss from continuing operations
$
(43,829
)
 
$
(199,418
)
 
$
(55,496
)
Less: Net income (loss) attributable to noncontrolling interests
2,766

 
(13
)
 
3,993

Net loss from continuing operations attributable to the Partnership
(46,595
)
 
(199,405
)
 
(59,489
)
Less:
 
 
 
 
 
Distributions on Series A Units
19,138

 
16,978

 
14,492

Distributions on Series C Units
9,487

 
—

 
—

Distributions on Series D Units
963

 
—

 
—

Distributions on Series B Units
—

 
1,373

 
2,220

Net income (loss) from continuing operations attributable to JPE preferred units
—

 
—

 
656

Net income (loss) from continuing operations attributable to predecessor capital
—

 
—

 
(2,014
)
General partner's distributions
2,550

 
6,790

 
2,694

General partner's share in undistributed loss
(1,691
)
 
(3,498
)
 
(1,325
)
Net loss from continuing operations attributable to Limited Partners
(77,042
)
 
(221,048
)
 
(76,212
)
Net loss from discontinued operations attributable to Limited Partners
(4,715
)
 
(423
)
 
(14,545
)
Net loss attributable to Limited Partners
$
(81,757
)
 
$
(221,471
)
 
$
(90,757
)
 
 
 
 
 
 
Weighted average number of common units used in computation of Limited Partners' net loss per common unit - basic and diluted
51,176

 
45,050

 
27,524

 
 
 
 
 
 
Limited Partners' net loss from continuing operations per unit (basic and diluted)
$
(1.51
)
 
$
(4.91
)
 
$
(2.77
)
Limited Partners' net loss from discontinued operations per unit (basic and diluted)
(0.09
)
 
(0.01
)
 
(0.52
)
Limited Partners' net loss per common unit - basic and diluted (1)
$
(1.60
)
 
$
(4.92
)
 
$
(3.29
)
 
_______________________
(1) Potential common unit equivalents are antidilutive for all periods and, as a result, have been excluded from the determination of diluted limited partners' net income (loss) per common unit.
Long-Term Incentive Plan
Long-Term Incentive Plan
Long-Term Incentive Plan

AMID Unit-Based Compensation

Our General Partner manages our operations and activities and employs the personnel who provide support to our operations. On November 19, 2015, the Board of Directors of our General Partner approved the Third Amended and Restated Long-Term Incentive Plan to, among other things, increase the number of common units authorized for issuance by 6,000,000 common units. On February 11, 2016, the unitholders approved the Third Amended and Restated Long-Term Incentive Plan (as amended and as currently in effect as of the date hereof, the "LTIP"). At December 31, 2016, 2015 and 2014, there were 5,017,528, 15,484 and 688,976 common units, respectively, available for future grant under the LTIP.

All equity-based awards issued under the LTIP consist of phantom units, distribution equivalent rights ("DER") or option grants. DERs and options have been granted on a limited basis. Future awards may be granted at the discretion of the Compensation Committee and subject to approval by the Board of Directors of our General Partner.

Phantom Unit Awards. Ownership in the phantom unit awards is subject to forfeiture until the vesting date. The LTIP is administered by the Compensation Committee of the Board of Directors of our General Partner, which at its discretion, may elect to settle such vested phantom units with a number of common units equivalent to the fair market value at the date of vesting in lieu of cash. Although our General Partner has the option to settle vested phantom units in cash, our General Partner has not historically settled these awards in cash. Under the LTIP, phantom units typically vest in increments of 25% on each grant anniversary date and do not contain any vesting requirements other than continued employment.

In December 2015, the Board of Directors of our General Partner approved a grant of 200,000 phantom units under the LTIP which contain DERs to the extent the Partnership’s Series A Preferred Unitholders receive distributions in cash. These units will vest on the three year anniversary of the date of grant, subject to acceleration in certain circumstances.

The following table summarizes activity in our phantom unit-based awards for the years ended December 31, 2016, 2015 and 2014:
 
 
Units
 
Weighted-Average Grant Date Fair Value Per Unit
 
Aggregate Intrinsic Value (1) (In thousands)
Outstanding units at December 2013
 
75,529

 
$
17.62

 
$
2,045

Granted
 
188,946

 
20.80

 
 
Forfeited
 
(12,009
)
 
(18.28
)
 
 
Vested
 
(51,334
)
 
(20.89
)
 
 
Outstanding units at December 2014
 
201,132

 
$
19.85

 
$
3,964

Granted
 
546,329

 
12.25

 
 
Forfeited
 
(31,298
)
 
(15.62
)
 
 
Vested
 
(146,404
)
 
(18.47
)
 
 
Outstanding units at December 2015
 
569,759

 
$
13.15

 
$
4,609

Granted
 
1,374,226

 
2.14

 
 
Forfeited
 
(411,794
)
 
(2.60
)
 
 
Vested
 
(286,348
)
 
(12.18
)
 
 
Outstanding units at December 2016
 
1,245,843

 
$
4.72

 
$
22,674



(1) The intrinsic value of phantom units was calculated by multiplying the closing market price of our underlying stock on December 31, 2016, 2015 and 2014 by the number of phantom units.

The fair value of our phantom units, which are subject to equity classification, is based on the fair value of our common units at the grant date. Compensation expense related to these awards for the years ended December 31, 2016, 2015, and 2014 was $3.6 million, $3.8 million and $1.5 million, respectively, and is included in Corporate expenses and Direct operating expenses in our consolidated statements of operations and the equity compensation expense in our consolidated statements of changes in partners' capital and noncontrolling interests.

The total fair value of units at the time of vesting was $2.4 million, $2.6 million, and $1.4 million for the years ended December 31, 2016, 2015, and 2014, respectively.

Equity compensation expense related to unvested phantom awards not yet recognized at December 31, 2016 was $4.2 million and the weighted average period over which this expense is expected to be recognized as of December 31, 2016 is approximately 2.2 years.

Performance and Service Condition Awards. In November 2015, the Board of Directors of our General Partner modified awards that introduced certain performance and service conditions that were probable of being achieved, amounting to $2.0 million payable to certain employees. During the third quarter of 2016, we settled $1.0 million of the obligation in cash while in the fourth quarter of 2016, forfeitures reduced the total payable amount from $2.0 million to $1.5 million. These awards are accounted for as liability classified awards. Compensation expense related to these awards for the years ended December 31, 2016 and 2015 was $0.9 million and $0.5 million, respectively, and is included in Direct operating expenses in our consolidated statements of operations. Compensation expense related to unvested awards not yet recognized at December 31, 2016 was $0.1 million.

Option to Purchase Common Units. In December 2015, the Board of Directors of our General Partner approved the grant of an option to purchase 200,000 common units at an exercise price per unit equal to $7.50. The grant will vest on January 1, 2019, subject to acceleration in certain circumstances, and will expire on March 15th of the calendar year following the calendar year in which it vests.

In August 2016, the Board of Directors of our General Partner approved the grant of an option to purchase 30,000 common units at an exercise price per unit equal to $12.00. The grant will vest on July 31, 2019, subject to continued employment, and will expire on July 31st of the calendar year following the calendar year in which it vests.

In September 2016, the Board of Directors of our General Partner approved the grant of an option to purchase 45,000 common units of the Partnership at an exercise price per unit equal to $13.88. The options will vest at a rate of 25% per year. The options will expire on September 30th of the calendar year following the calendar year in which it vests.

The Black-Scholes pricing model was used to determine the fair value of our options grants using the following assumptions:
 
Years Ended December 31,
 
2016
 
2015
Weighted average common unit price volatility
61.1
%
 
47.0
%
Expected distribution yield
12.6
%
 
26.3
%
Weighted average expected term (in years)
4.10

 
3.5

Weighted average risk-free rate
1.1
%
 
1.3
%


The weighted average unit price volatility was based upon the historical volatility of our common units. The expected distribution yield was based on an annualized distribution divided by the closing unit price on the date of grant. The risk-free rate was based on the U.S. Treasury yield curve in effect on the date of grant.

Compensation expense related to these awards was not material for the years ended December 31, 2016 and 2015. Compensation cost related to unvested awards not yet recognized at December 31, 2016 was $0.2 million.

The following table summarizes our option activity for the years ended December 31, 2016 and 2015:
 
 
Units
 
Weighted-Average Exercise Price
 
Weighted-Average Grant Date Fair Value per Unit
 
Aggregate Intrinsic Value (1) (In thousands)
 
Weighted Average Remaining Contractual Life (Years)
Outstanding at December 31, 2014
 
—

 
$
—

 
$
—

 
$
—

 
—

Granted
 
200,000

 
7.50

 
0.33

 
—

 
—

Vested
 
—

 
—

 
 
 
—

 
—

Forfeited
 
—

 
—

 
 
 
—

 
—

Outstanding at December 31, 2015
 
200,000

 
$
7.50

 
$
0.33

 
$
118

 
4.2

Granted
 
75,000

 
13.13

 
2.65

 
—

 
—

Vested
 
—

 
—

 
 
 
—

 
—

Forfeited
 
—

 
—

 
 
 
—

 
—

Outstanding at December 31, 2016
 
275,000

 
$
9.03

 
$
0.96

 
$
2,522

 
5.0


(1) The intrinsic value of the stock option is the amount by which the current market value of the underlying stock exceeds the exercise price of the option.

JPE Unit-Based Compensation

Long-Term Incentive Plan and Phantom Units. The JPE 2014 Long-Term Incentive Plan (“JPE LTIP”) authorized grants of up to 3,642,700 common units. Phantom units issued under the JPE LTIP were primarily composed of two types of grants: (1) service condition grants with vesting over three years in equal annual installments; and (2) service condition grants with cliff vesting on April 1, 2018. Distributions related to these unvested phantom units are paid concurrent with our distribution for common units. The fair value of phantom units issued under the JPE LTIP was determined by utilizing the market value of our common units on the respective grant date.

The following table presents phantom units activity for the years ended December 31, 2016 and 2015: 
 
 
Units
 
Weighted Average
Grant date Fair Value
 
 
 
 
 
Outstanding units at December 2014
 
—

 
$
—

Granted
 
287,750

 
22.25

Vested
 
(4,766
)
 
22.34

Forfeited
 
(56,005
)
 
21.23

Outstanding units at December 2015
 
226,979

 
$
22.5

Granted
 
209,507

 
9.23

Vested
 
(55,778
)
 
19.51

Forfeited
 
(67,716
)
 
18.74

Outstanding units at December 2016
 
312,992

 
$
14.96



Total unit-based compensation expense related to JPE phantom units was $1.7 million and $0.8 million for the years ended December 31, 2016 and 2015, respectively, which was recorded in corporate expenses in the consolidated statements of operations.
Income Taxes
Income Taxes
 Income Taxes

With the exception of certain subsidiaries in our Terminals Segment, the Partnership is not subject to U.S. federal or state income taxes as such income taxes are generally borne by our unitholders through the allocation of our taxable income (loss) to them. The State of Texas does impose a franchise tax that is assessed on the portion of our taxable margin which is apportioned to Texas.

Income tax (expense) benefit for the years ended December 31, 2016, 2015 and 2014 is as follows:
 
Years Ended December 31,
 
2016
 
2015
 
2014
Current income tax expense
$
(521
)
 
$
(648
)
 
$
(146
)
Deferred income tax expense
(2,059
)
 
(1,237
)
 
(710
)
 
 
 
 
 
 
Effective income tax rate
6.3
%
 
1.0
%
 
1.6
%


A reconciliation of our expected income tax (expense) benefit calculated at the U.S. federal statutory rate of 34% to our actual tax (expense) for the years ended December 31, 2016, 2015 and 2014 is as follows:

 
Years Ended December 31,
 
2016
 
2015
 
2014
Net income (loss) before income tax expense
$
(41,249
)
 
$
(197,533
)
 
$
(54,640
)
US Federal statutory tax rate
34
%
 
34
%
 
34
%
Federal income tax (expense) benefit at statutory rate
14,025

 
67,161

 
18,578

Reconciling items:
 
 
 
 
 
    Partnership loss not subject to income tax (benefit)
(15,800
)
 
(68,048
)
 
(18,936
)
    State and local tax expense
(800
)
 
(857
)
 
(459
)
    Other
(5
)
 
(141
)
 
(39
)
Income tax expense
$
(2,580
)
 
$
(1,885
)
 
$
(856
)

The Partnership’s deferred tax assets and liabilities as of December 31, 2016 and 2015 are summarized below:
 
December 31,
 
2016
 
2015
Deferred tax assets:
 
 
 
    Net operating loss carryforwards
$
6,300

 
$
7,570

    Other
577

 
493

    Total deferred tax assets
6,877

 
8,063

Deferred tax liabilities:
 
 
 
    Property, plant and equipment
(15,082
)
 
(14,236
)
Deferred income tax liability, net
$
(8,205
)
 
$
(6,173
)


As of December 31, 2016, certain subsidiaries in our Terminals Segment had net operating loss carryforwards for federal income tax purposes of approximately $16.1 million which begin to expire in 2028.

We recognize the tax benefits from uncertain tax positions if it is more likely than not that the position will be sustained on examination by the taxing authorities. As of December 31, 2016, we have not recognized tax benefits relating to uncertain tax positions.

The preparation of our income tax returns requires the use of management's estimates and interpretations which may be subjected to review by the respective taxing authorities and may result in an assessment of additional taxes, penalties and interest. Tax years subsequent to 2010 remain subject to examination by federal and state taxing authorities.
Commitments and Contingencies
Commitments and Contingencies
Commitments and Contingencies

Legal proceedings

We are not currently party to any pending litigation or governmental proceedings, other than ordinary routine litigation incidental to our business. While the ultimate impact of any proceedings cannot be predicted with certainly, our management believes that the resolution of any of our pending proceeds will not have a material adverse effect on our financial condition or results of operations.

Environmental matters

We are subject to federal and state laws and regulations relating to the protection of the environment. Environmental risk is inherent in our operations and we could, at times, be subject to environmental cleanup and enforcement actions. We attempt to manage this environmental risk through appropriate environmental policies and practices to minimize any impact our operations may have on the environment.

Regulatory matters

On October 8, 2014, American Midstream (Midla), LLC ("Midla") reached an agreement in principle with its customers regarding the interstate pipeline that traverses Louisiana and Mississippi in order to provide continued service to its customers while addressing safety concerns with the existing pipeline.

On April 16, 2015, FERC approved the stipulation and agreement (the “Midla Agreement”) relating to the October 8, 2014 regulatory matter and allowing Midla to retire the existing 1920’s pipeline and replace it with the Midla-Natchez Line to serve existing residential, commercial, and industrial customers. Under the Midla Agreement, customers not served by the new Midla-Natchez Line will be connected to other interstate or intrastate pipelines, other gas distribution systems, or offered conversion to propane service. On June 29, 2015, the Partnership filed with FERC for authorization to construct the Midla-Natchez pipeline, which was approved on December 17, 2015. Construction commenced in the second quarter of 2016 with service expected to begin in the first six months of 2017. Under the Midla Agreement, Midla plans to execute long-term agreements seeking to recover its investment in the Midla-Natchez Line.

Exit and disposal costs

On March 9, 2016, management committed to a corporate headquarters relocation plan and communicated that plan to the impacted employees. The plan included relocation assistance or one-time termination benefits for employees who rendered service until their respective termination dates. Charges associated with these termination benefits, which totaled $9.1 million were recognized ratably over the requisite service period and are presented in Corporate expenses in our consolidated statements of operations. At December 31, 2016, payments under the plan had been completed.

Commitments and contractual obligations

The Partnership had the following non-cancelable contractual commitments as of December 31, 2016:
 
 
Revolving Credit Agreements
 
3.77% Senior Notes
 
8.50% Senior Notes (1)
 
Asset Retirement Obligation (2)
 
     Other
 
Total
 
 
(in thousands)
2017
 
$
—

 
$
1,677

 
$
—

 
$
6,499

 
$
7,428

 
$
15,604

2018
 
—

 
806

 
—

 
—

 
4,507

 
5,313

2019
 
888,250

 
2,233

 
—

 
—

 
4,389

 
894,872

2020
 
—

 
2,299

 
—

 
—

 
2,670

 
4,969

2021
 
—

 
4,430

 
300,000

 
—

 
2,244

 
306,674

Thereafter
 
—

 
48,555

 
—

 
44,363

 
17,991

 
110,909

 
 
$
888,250

 
$
60,000

 
$
300,000

 
$
50,862

 
$
39,229

 
$
1,338,341


(1) Upon closing of the JPE Merger, the proceeds from the 8.50% Senior Notes were used to repay the JPE Credit Agreement.
(2) In some cases, there is insufficient information to reasonably determine the timing and/or method of settlement for purposes of estimating the fair value of the asset retirement obligation. In these cases, the asset retirement obligation cost is considered indeterminate because there is no data or information that can be derived from past practice, industry practice, management's experience, or the asset's estimated economic life.

For the years ended December 31, 2016, 2015 and 2014, total rental expenses were $15.9 million, $14.4 million, and $7.9 million, respectively.
Related-Party Transactions
Related-Party Transactions
Related-Party Transactions

Employees of our General Partner are assigned to work for the Partnership or other ArcLight affiliates. Where directly attributable, all compensation and related expenses for these employees are charged directly by our General Partner to American Midstream, LLC, which, in turn, charges the appropriate subsidiary or affiliate. Our General Partner does not record any profit or margin on the expenses charged to us. During the years ended December 31, 2016, 2015, and 2014, related expenses of $89.8 million, $98.3 million, and $95.5 million respectively, were charged to the Partnership by our General Partner. As of December 31, 2016, and 2015, the Partnership had $3.9 million and $3.8 million, respectively, due to our General Partner, which has been recorded in Accrued expenses and other current liabilities and relates primarily to compensation. This payable is generally settled on a quarterly basis related to the foregoing transactions.

During the second quarter of 2014, the Partnership and an ArcLight affiliate entered into an agreement under which the affiliate pays a monthly fee to reimburse the Partnership for administrative expenses incurred on the affiliate’s behalf. For the years ended December 31, 2016, 2015, and 2014, the Partnership recognized related management fee income of $0.8 million, $1.4 million and $0.9 million respectively, under this agreement and recorded such amounts as a reduction of Corporate expenses in the consolidated statements of operations.

We also performed certain management services for another ArcLight affiliate for which we received a monthly fee of $50,000 through January 2016. The monthly fee reduced Corporate expenses in the consolidated statements of operations by $0.1 million, $0.6 million and $0.6 million for the years ended December 31, 2016, 2015 and 2014, respectively.

During the years ended December 31, 2016 and 2015, our General Partner agreed to absorb certain of our corporate expenses. We received reimbursements for these expenses in the quarter subsequent to when they were incurred. We received reimbursements totaling $7.5 million and $3.0 million for the years ended December 31, 2016 and 2015, respectively. In the first quarter of 2015, certain executive bonuses related to the year ended December 31, 2014 were paid on our behalf by ArcLight. In addition, ArcLight reimbursed us for expenses we incurred for the years ended December 31, 2016 and 2015. The total amounts paid on our behalf or reimbursed to us were $2.4 million and $2.6 million for the years ended December 31, 2016 and 2015, respectively, and were treated as deemed contributions from ArcLight.

An ArcLight affiliate provided crude oil pipeline transportation services to our discontinued Mid-Continent Business. During the years ended December 31, 2016, 2015 and 2014, we incurred related pipeline transportation fees of $0.4 million, $6.0 million and $8.9 million, respectively, which have been included in net loss from discontinued operations, net of tax in the consolidated statements of operations. As of December 31, 2015, we had a net receivable of $7.9 million from this affiliate, primarily as the result of the prepayments made in 2014 for the crude oil pipeline transportation services to be provided.

The Partnership acquired Blackwater Midstream Holdings, LLC (“Blackwater”) from affiliates of ArcLight in December 2013. The acquisition agreement included a provision whereby an ArcLight affiliate would be entitled to an additional $5.0 million of merger consideration based on Blackwater meeting certain operating targets. During the third quarter of 2016, the Partnership determined that it was probable the operating targets would be met in early 2017 and recorded a $5.0 million accrued distribution to the ArcLight affiliate which is included in Accrued expenses and other current liabilities in the accompanying consolidated balance sheet at December 31, 2016.

American Panther, LLC ("American Panther") is a 60%-owned subsidiary of the Partnership which is consolidated for financial reporting purposes. Pursuant to a related agreement which began in the second quarter of 2016, an affiliate of the non-controlling interest holder provides services to American Panther in exchange for related fees, which in 2016 totaled $1.2 million of which $0.8 million is included in Direct operating expenses and $0.4 million is included in Corporate expenses in the consolidated statement of operations.

On November 1, 2016, the Partnership became operator of the Destin and Okeanos pipelines and entered into operating and administrative management agreements under which the affiliates pay a monthly fee for general and administrative services provided by the Partnership. In addition, the affiliates reimbursed the Partnership for certain transition related expenses. For the year ended December 31, 2016, the Partnership recognized $0.4 million of management fee income and $1.0 million as reimbursement of transition related expenses in Corporate expenses in the consolidated statements of operations.

During the second quarter of 2015, we began performing administrative, crude transportation and marketing services for an ArcLight affiliate. We charged $3.2 million and $3.0 million for the years ended December 31, 2016 and 2015, respectively, for these services of which $3.2 million and $2.2 million was included in Services for the years ended December 31, 2016 and 2015, respectively, and $0.8 million was included in Commodity sales for the year ended December 31, 2015 on the consolidated statements of operations. As of December 31, 2016 and 2015, we had receivables due from this affiliate of $2.1 million and $0.7 million, respectively, which are included in other current assets in the consolidated balance sheets.
 
The Partnership enters into purchases and sales of natural gas and crude oil with a company whose chief financial officer is the brother of one of our executive officers. During the years ended December 31, 2016, 2015, and 2014, the Partnership recognized related revenue of $3.6 million, $6.2 million and $10.1 million, respectively, while purchases from the company totaled $4.3 million, $5.9 million, and $3.7 million, respectively.
Supplemental Cash Flow Information
Supplemental Cash Flow Information
Supplemental Cash Flow Information

Supplemental cash flows and non-cash transactions consists of the following (in thousands):

 
Years Ended December 31,
 
2016
 
2015
 
2014
Supplemental cash flow information
 
 
 
 
 
Interest payments, net of capitalized interest
$
22,303

 
$
16,540

 
$
13,905

Cash paid for taxes
530

 
450

 
108

Supplemental non-cash information
 
 
 
 
 
Increase (decrease) in accrued property, plant and equipment purchases
$
8,533

 
$
(21,841
)
 
$
35,018

Contributions from general partner
7,500

 
4,350

 
—

Acquisitions partially funded by the issuance of common units
—

 
3,442

 
414,396

Assets acquired under capital lease
139

 
—

 
177

Issuance of Series C Units and Warrant in connection with the Emerald Transactions
120,000

 
—

 
—

Accrued cash distributions on convertible preferred units
7,103

 
—

 
—

Paid-in-kind distributions on convertible preferred units
14,446

 
16,978

 
13,154

Paid-in-kind distributions on Series B Units
—

 
1,373

 
2,220

Paid-in-kind distributions on JPE Series D units
—

 
—

 
2,436

Cancellation of escrow units
6,817

 
—

 
—

Additional Blackwater acquisition consideration
5,000

 
—

 
—

Reportable Segments
Reportable Segments
Reportable Segments

Our operations are located in the United States and are organized into the following reportable segments: Gas Gathering and Processing Services, Liquid Pipelines and Services, Natural Gas Transportation Services, Offshore Pipeline and Services, and Terminalling Services. These segments, are described below, have been identified based on the differing products and services, regulatory environments and the expertise required for these operations.

Gas Gathering and Processing Services provides “wellhead-to-market” services to producers of natural gas and crude oil, which include transporting raw natural gas and crude oil from various receipt points through gathering systems, treating the raw natural gas, processing raw natural gas to separate the NGLs from the natural gas, fractionating NGLs, and selling or delivering pipeline-quality natural gas and NGLs to various markets and pipeline systems.

Liquid Pipelines and Services provides transportation, purchase and sales of crude oil from various receipt points including lease automatic custody transfer ("LACT") facilities and delivering to various markets.

Natural Gas Transportation Services transports and delivers natural gas from producing wells, receipt points or pipeline interconnects for shippers and other customers, which include local distribution companies (“LDCs”), utilities and industrial, commercial and power generation customers.

Offshore Pipelines and Services gathers and transports natural gas from various receipt points to other pipeline interconnects, onshore facilities and other delivery points.

Terminalling Services provides above-ground leasable storage operations at our marine terminals that support various commercial customers, including commodity brokers, refiners and chemical manufacturers to store a range of products and also includes crude oil storage in Cushing, OK and refined products terminals in Texas and Arkansas.



Our Chief Executive Officer serves as our Chief Operating Decision Maker and evaluates the performance of our reportable segments primarily on the basis of segment gross margin, which is our segment measure of profitability. We define segment gross margin for each segment as summarized below:

Gas Gathering and Processing Services - total revenue plus unconsolidated affiliate earnings less unrealized gains (losses) on commodity derivatives, construction and operating management agreement income and the cost of sales.

Liquid Pipelines and Services - total revenue plus unconsolidated affiliate earnings less unrealized gains (losses) on commodity derivatives and the cost of sales. Substantially all of our gross margin in this segment is fee-based or fixed-margin, with little to no direct commodity price risk.

Natural Gas Transportation Services - total revenue plus unconsolidated affiliate earnings less the cost of sales. Substantially all of our gross margin in this segment is fee-based or fixed-margin, with little to no direct commodity price risk.

Offshore Pipelines and Services - total revenue plus unconsolidated affiliate earnings less the cost of sales. Substantially all of our gross margin in this segment is fee-based or fixed-margin, with little to no direct commodity price risk.

Terminalling Services - total revenue less direct operating expense which includes direct labor, general materials and supplies and direct overhead.



 
The following tables set forth our segment financial information for the periods indicated:

 
 
December 31, 2016
 
 
Gas Gathering and Processing Services
Liquid Pipelines and Services
Natural Gas Transportation Services
Offshore Pipelines and Services
Terminalling Services
Total
 
 
(in thousands)
Commodity sales
 
$
91,444

$
304,502

$
21,999

$
6,812

$
14,655

$
439,412

Services
 
22,558

19,063

18,109

40,502

50,999

151,231

Gains (losses) on commodity derivatives, net
 
(833
)
(341
)
—

(7
)
(436
)
(1,617
)
Total Revenue
 
113,169

323,224

40,108

47,307

65,218

589,026

 
 
 
 
 
 
 
 
Cost of sales
 
63,832

293,618

21,288

3,049

11,564

393,351

Direct operating expenses
 
33,802

10,091

5,923

10,945

10,783

71,544

Corporate expenses
 
 
 
 
 
 
89,438

Depreciation, amortization, and accretion
 
 
 
 
 
 
90,882

Loss on sale of assets, net
 
 
 
 
 
 
688

Loss on impairment of plant, property and equipment
 
 
 
 
 
 
697

Loss on impairment of goodwill
 
 
 
 
 
 
2,654

Interest expense
 
 
 
 
 
 
21,433

Earnings in unconsolidated affiliates
 
 
 
 
 
 
(40,158
)
Other (income) expense
 
 
 
 
 
 
(254
)
Income tax expense
 
 
 
 
 
 
2,580

Income (loss) from continuing operations
 
 
 
 
 
 
(43,829
)
Loss from discontinuing operations, net of tax
 
 
 
 
 
 
(4,715
)
Net income (loss)
 
 
 
 
 
 
(48,544
)
Net income (loss) attributable to non-controlling interest
 
 
 
 
 
 
2,766

Net income (loss) attributable to partnership
 
 
 
 
 
 
$
(51,310
)
 
 
 
 
 
 
 
 
Segment gross margin
 
$
48,245

$
31,556

$
18,616

$
82,346

$
42,872

 

 
 
December 31, 2015
 
 
Gas Gathering and Processing Services
Liquid Pipelines and Services
Natural Gas Transportation Services
Offshore Pipelines and Services
Terminalling Services
Total
 
 
(in thousands)
Commodity sales
 
$
107,680

$
457,448

$
23,972

$
13,798

$
10,343

$
613,241

Services
 
30,196

23,008

16,035

21,457

45,022

135,718

Gains (losses) on commodity derivatives, net
 
1,240

—

—

84

21

1,345

Total Revenue
 
139,116

480,456

40,007

35,339

55,386

750,304

 
 
 
 
 
 
 
 
Cost of sales
 
72,960

454,057

21,858

9,914

8,893

567,682

Direct operating expenses
 
35,250

9,912

6,728

9,425

10,414

71,729

Corporate expenses
 
 
 
 
 
 
65,327

Depreciation, amortization, and accretion
 
 
 
 
 
 
81,335

Loss on sale of assets, net
 
 
 
 
 
 
2,860

Loss on impairment of goodwill
 
 
 
 
 
 
148,488

Interest expense
 
 
 
 
 
 
20,077

Earnings in unconsolidated affiliates
 
 
 
 
 
 
(8,201
)
Other (income) expense
 
 
 
 
 
 
(1,460
)
Income tax expense
 
 
 
 
 
 
1,885

Income (loss) from continuing operations
 
 
 
 
 
 
(199,418
)
Loss from discontinuing operations, net of tax
 
 
 
 
 
 
(423
)
Net income (loss)
 
 
 
 
 
 
(199,841
)
Net income (loss) attributable to non-controlling interest
 
 
 
 
 
 
(13
)
Net income (loss) attributable to partnership
 
 
 
 
 
 
$
(199,828
)
 
 
 
 
 
 
 
 
Segment gross margin
 
$
65,692

$
26,399

$
18,073

$
33,613

$
36,079

 



 
 
December 31, 2014
 
 
Gas Gathering and Processing Services
Liquid Pipelines and Services
Natural Gas Transportation Services
Offshore Pipelines and Services
Terminalling Services
Total
 
 
(in thousands)
Commodity sales
 
$
148,198

$
470,936

$
70,964

$
20,044

$
11,521

$
721,663

Services
 
15,248

22,239

12,925

24,426

41,357

116,195

Gains (losses) on commodity derivatives, net
 
1,050

—

—

41

—

1,091

Total Revenue
 
164,496

493,175

83,889

44,511

52,878

838,949

 
 
 
 
 
 
 
 
Cost of sales
 
112,719

468,137

70,100

15,133

6,859

672,948

Direct operating expenses
 
21,197

7,209

6,975

11,142

11,525

58,048

Corporate expenses
 
 
 
 
 
 
60,465

Depreciation, amortization, and accretion
 
 
 
 
 
 
57,818

Loss on sale of assets, net
 
 
 
 
 
 
4,087

Loss on impairment of plant, property and equipment
 
 
 
 
 
 
21,344

Interest expense
 
 
 
 
 
 
16,497

Earnings in unconsolidated affiliates
 
 
 
 
 
 
(348
)
Other (income) expense
 
 
 
 
 
 
1,096

Loss on extinguishment of debt
 
 
 
 
 
 
1,634

Income tax expense
 
 
 
 
 
 
856

Income (loss) from continuing operations
 
 
 
 
 
 
(55,496
)
Loss from discontinuing operations, net of tax
 
 
 
 
 
 
(24,071
)
Net income (loss)
 
 
 
 
 
 
(79,567
)
Net income (loss) attributable to non-controlling interest
 
 
 
 
 
 
3,993

Net income (loss) attributable to partnership
 
 
 
 
 
 
$
(83,560
)
 
 
 
 
 
 
 
 
Segment gross margin
 
$
51,213

$
25,038

$
13,691

$
29,089

$
34,493

 


A reconciliation of total assets by segment to the amounts included in the consolidated balance sheets is as follows:

 
December 31,
 
2016
 
2015
Segment assets:
(in thousands)
Gas Gathering and Processing Services
$
530,889

 
$
496,014

Liquid Pipelines and Services
425,389

 
434,395

Natural Gas Transportation Services
221,604

 
146,927

Offshore Pipelines and Services
400,193

 
190,271

Terminalling Services
299,534

 
291,130

   Other (1)
334,953

 
19,716

   Discontinued operations
136,759

 
$
173,436

Total assets
$
2,349,321

 
$
1,751,889

_______________________
(1) Other assets not allocable to segments consist of investment in unconsolidated affiliates, restricted cash and other assets.
Quarterly Financial Data (Unaudited)
Quarterly Financial Data (Unaudited)
Quarterly Financial Data (Unaudited)

Summarized unaudited quarterly financial data for 2016 and 2015 are as follows (in thousands, except per unit amounts):
 
 
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter (2)
Year Ended December 31, 2016
 
 
 
 
 
 
 
Total revenues
$
100,998

 
$
152,253

 
$
159,903

 
$
175,872

Total segment gross margin (1)
46,430

 
59,016

 
58,793

 
59,396

Operating loss
(16,097
)
 
(12,790
)
 
(9,724
)
 
(21,617
)
Net loss from continuing operations
(17,772
)
 
(12,156
)
 
(5,488
)
 
(8,413
)
Income (loss) from discontinued operations
7,169

 
2,675

 
(2,310
)
 
(12,249
)
Net income (loss) attributable to noncontrolling interest
(3
)
 
954

 
1,241

 
574

Net income (loss) attributable to the Partnership
(10,600
)
 
(10,435
)
 
(9,039
)
 
(21,236
)
General Partner's Interest in net income (loss)
(97
)
 
(107
)
 
(31
)
 
2

Limited Partners' Interest in net loss
$
(10,503
)
 
$
(10,328
)
 
$
(9,008
)
 
$
(21,238
)
 
 
 
 
 
 
 
 
Limited Partners' income (loss) per unit:
 
 
 
 
 
 
 
Loss from continuing operations
$
(0.49
)
 
$
(0.40
)
 
$
(0.29
)
 
$
(0.33
)
Income (loss) from discontinued operations
0.16

 
0.07

 
(0.05
)
 
$
(0.27
)
Net loss
$
(0.33
)
 
$
(0.33
)
 
$
(0.34
)
 
$
(0.60
)
 
 
 
 
 
 
 
 
Year Ended December 31, 2015
 
 
 
 
 
 
 
Total revenues
$
184,937

 
$
227,693

 
$
174,848

 
$
162,826

Total segment gross margin (1)
45,314

 
44,921

 
41,445

 
48,176

Operating loss
(8,785
)
 
(6,815
)
 
(11,114
)
 
(160,403
)
Net loss from continuing operations
(12,523
)
 
(11,977
)
 
(15,607
)
 
(159,311
)
Income (loss) from discontinued operations
10,596

 
1,575

 
(900
)
 
(11,694
)
Net income (loss) attributable to noncontrolling interest
4

 
22

 
24

 
(63
)
Net loss attributable to the Partnership
(1,932
)
 
(10,425
)
 
(16,532
)
 
(170,939
)
General Partner's Interest in net loss
(32
)
 
(66
)
 
(104
)
 
(1,621
)
Limited Partners' Interest in net loss
$
(1,900
)
 
$
(10,358
)
 
$
(16,428
)
 
$
(169,319
)
 
 
 
 
 
 
 
 
Limited Partners' income (loss) per unit:
 
 
 
 
 
 
 
Loss from continuing operations
$
(0.41
)
 
$
(0.41
)
 
$
(0.51
)
 
$
(3.58
)
Income (loss) from discontinued operations, net of tax
0.25

 
0.03

 
(0.02
)
 
(0.27
)
Net loss
$
(0.16
)
 
$
(0.38
)
 
$
(0.53
)
 
$
(3.85
)
 
(1)
For a definition of total segment gross margin and a reconciliation to its most directly comparable financial measure calculated and presented in accordance with GAAP and a discussion of how we use gross margin to evaluate our operating performance, please read Item 7. "Management's Discussion and Analysis, How We Evaluate Our Operations."
(2)
We recognized goodwill impairment charges of $2.7 million and $148.5 million in the fourth quarters of 2016 and 2015, respectively.
Subsequent Event
Subsequent Event
Subsequent Event

Distribution

On January 26, 2017, we announced that the Board of Directors of our General Partner declared a quarterly cash distribution of
$0.4125 per common unit for the fourth quarter ended December 31, 2017, or $1.65 per common unit on an annualized basis. The distribution is expected to be paid on February 13, 2017, to unitholders of record as of the close of business February 6, 2017.

Dakota Access Connection Agreement

On March 1, 2017, the Partnership announced it has entered a connection agreement with Dakota Access Pipeline (“DAPL”), the 1,172-mile pipeline that extends from the Partnership’s Bakken formation production area in North Dakota to Patoka, Illinois. The new DAPL interconnect will tie into the Partnership’s Bakken crude oil gathering system which consists of interstate pipelines with capacity to transport up to approximately 40,000 barrels per day of crude oil.
Organization and Basis of Presentation (Policies)
Nature of business 
Nature of business

We provide critical midstream infrastructure that links producers of natural gas, crude oil, NGLs, condensate and specialty chemicals to numerous intermediate and end-use markets. Through our five reportable segments, (1) gas gathering and processing services, (2) liquid pipelines and services, (3) natural gas transportation services, (4) offshore pipelines and services, and (5) terminalling services, we engage in the business of gathering, treating, processing, and transporting natural gas; gathering, transporting, storing, treating and fractionating NGLs; gathering, storing and transporting crude oil and condensates and storing specialty chemical products and selling refined products. Most of our cash flow is generated from fee-based and fixed-margin compensation for gathering, processing, transporting and treating natural gas and crude oil, firm capacity reservation charges, interruptible transportation charges, guaranteed firm storage contracts, throughput fees and other optional charges associated with ancillary services.

Our primary assets are strategically located in some of the most prolific onshore and offshore producing regions and key demand markets in the United States. Our gathering and processing assets are primarily located in (i) the Permian Basin of West Texas, (ii) the Cotton Valley/Haynesville Shale of East Texas, (iii) the Eagle Ford Shale of South Texas, (iv) the Bakken Shale of North Dakota, and (v) offshore in the Gulf of Mexico. Our transmission and terminal assets are in key demand markets in Oklahoma, Alabama, Arkansas, Louisiana, Mississippi and Tennessee and in the Port of New Orleans in Louisiana and the Port of Brunswick in Georgia.

Basis of presentation 
Basis of presentation

As discussed in Note 2, we acquired JP Energy Partners, LP ("JPE") in a unit-for-unit exchange on March 8, 2017. As both the Partnership and JPE were controlled by ArcLight, the acquisition represents a transaction among entities under common control and has been accounted for as a common control transaction in a manner similar to a pooling of interests. Although the Partnership is the legal acquirer, JPE is considered to be the acquirer for accounting purposes as ArcLight obtained control of JPE before it obtained control the Partnership. The accompanying financial statements represent the JPE historical cost basis financial statements retrospectively adjusted to reflect its acquisition of the Partnership at ArcLight’s historical cost basis effective April 15, 2013, the date on which ArcLight obtained control of the Partnership. As the Partnership was the legal acquirer, unit amounts included in the accompanying financial statements represent the Partnership’s historical unit amounts plus the JPE unit amounts adjusted by the applicable exchange ratios.

Discontinued Operations

On September 1, 2017, we completed the disposition of the Propane Marketing Services business (the "Propane Business") pursuant to the Membership Interest Purchase Agreement dated July 21, 2017, between AMID Merger LP, a wholy owned subsidiary of the Partnership and SHV Energy N.V. Through the transaction, we divested Pinnacle Propane’s 40 service locations; Pinnacle Propane Express’ cylinder exchange business and related logistic assets; and the Alliant Gas utility system. Prior to the sale, we moved the trucking business from the Propane Marketing Services segment to the Liquid Pipelines and Services segment for all periods presented. During the years ended December 31, 2016, 2015, and 2014, the trucking business had revenues of $6.9 million, $10.3 million, and $11.3 million, respectively, which represent 5%, 6%, and 6% of total Propane Business revenue, respectively. Additionally, for the years ended December 31, 2016, 2015, and 2014, the trucking business had inter-segment revenues of $2.0 million, $2.1 million, and $3.7 million with the Propane Business that were previously eliminated in consolidation, and are now included in the total trucking business revenue, with the offsetting expenses included in discontinued operations.

In connection with the transaction, we received $170.0 million in cash and recorded a gain on the sale of $46.5 million, net of $2.5 million transaction costs. As a result of the disposition of the Propane Business, we have classified the accounts and the results of operations of the Propane Business as discontinued operations. See Note 3 for additional details.
Transactions between entities under common control 
Transactions between entities under common control
 
We may enter into transactions with ArcLight affiliates whereby we receive midstream assets or other businesses in exchange for cash or Partnership equity. We account for the net assets acquired at the affiliate's historical cost basis as the transactions are between entities under common control. In certain cases, our historical financial statements will be revised to include the results attributable to the assets acquired from the later of April 15, 2013 (the date Arclight affiliates obtained control of our General Partner) or the date the ArcLight affiliate obtained control of the assets acquired.
Consolidation policy 
Consolidation policy

The accompanying consolidated financial statements include accounts of American Midstream Partners, LP, and its controlled subsidiaries. All significant inter-company accounts and transactions have been eliminated in the preparation of the accompanying consolidated financial statements.
Use of estimates 
Use of estimates

When preparing consolidated financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP"), management must make estimates and assumptions based on information available at the time. These estimates and assumptions affect the reported amounts of assets, liabilities, revenues and expenses, as well as the disclosures of contingent assets and liabilities as of the date of the financial statements. Estimates and assumptions are based on information available at the time such estimates and assumptions are made. Adjustments made with respect to the use of these estimates and assumptions often relate to information not previously available. Uncertainties with respect to such estimates and assumptions are inherent in the preparation of financial statements. Estimates and assumptions are used in, among other things, i) estimating unbilled revenues, product purchases and operating and general and administrative costs, ii) developing fair value assumptions, including estimates of future cash flows and discount rates, iii) analyzing long-lived assets, goodwill and intangible assets for possible impairment, iv) estimating the useful lives of assets and v) determining amounts to accrue for contingencies, guarantees and indemnifications. Actual results, therefore, could differ materially from estimated amounts.
Cash, cash equivalents and restricted cash 
Cash, cash equivalents and restricted cash

We consider all highly liquid investments with an original maturity of three months or less at the date of purchase to be cash equivalents. The carrying value of cash and cash equivalents approximates fair value because of the short term to maturity of these investments.

From time to time we are required to maintain cash in separate accounts the use of which is restricted by the terms of our debt agreements or asset retirement obligations. Such amounts are included in Restricted cash in our consolidated balance sheets.
Inventory 
Inventory

Inventory is mainly comprised of crude oil, NGLs and refined products for resale. Inventory is stated at the lower of cost or market. The cost of crude oil, NGLs, and refined products is determined using the first-in, first-out (FIFO) method.
Allowance for doubtful accounts 
Allowance for doubtful accounts
We establish provisions for losses on accounts receivable when we determine that we will not collect all or part of an outstanding balance. Collectability is reviewed regularly and an allowance is established or adjusted, as necessary, using the specific identification method.
Derivative financial instruments 
Derivative financial instruments

Our net income (loss) and cash flows are subject to volatility stemming from changes in interest rates on our variable rate debt, commodity prices and fractionation margins (the relative difference between the price we receive from NGL sales and the corresponding cost of natural gas purchases). In an effort to manage the risks to unitholders, we use a variety of derivative financial instruments including swaps, collars and interest rate caps to create offsetting positions to specific commodity or interest rate exposures. We record all derivative financial instruments in our consolidated balance sheets at fair value as current and long-term assets or liabilities on a net basis by counterparty. We record changes in the fair value of our commodity derivatives in Gains (losses) on commodity derivatives, net while changes in the fair value of our interest rate swaps are included in Interest expense in our consolidated statements of operations.

Our hedging program provides a control structure and governance for our hedging activities specific to identified risks and time periods, which are subject to the approval and monitoring by the Board of Directors of our General Partner. We employ derivative financial instruments in connection with an underlying asset, liability or anticipated transaction, and we do not use derivative financial instruments for speculative or trading purposes.

The price assumptions we use to value our derivative financial instruments can affect our net income (loss) each period. We use published market price information where available, or quotations from over-the-counter, market makers to find executable bids and offers. The valuations also reflect the potential impact of related conditions, including credit risk of our counterparties. The amounts reported in our consolidated financial statements change quarterly as these valuations are revised to reflect actual results, changes in market conditions or other factors, many of which are beyond our control.

We are also a party to a number of contracts that have elements of a derivative instrument. These contracts are primarily forward crude oil purchase and sales contracts with counterparties. Although many of these contracts have the requisite elements of a derivative instrument, these contracts qualify for the normal purchase and normal sales exception because they provide for the delivery of products or services in quantities that are expected to be used in the normal course of operating our business and the price in the contract is based on an underlying that is directly associated with the price of the product or service being purchased or sold. As a result, these contracts are not recorded in our consolidated financial statements until they are settled.
Fair value measurements 
Fair value measurements

We apply the authoritative accounting provisions for measuring the fair value of our derivative financial instruments and disclosures associated with our outstanding indebtedness. We define fair value as an exit price representing the expected amount we would receive when selling an asset or pay to transfer a liability in an orderly transaction with market participants at the measurement date.

We use various assumptions and methods in estimating the fair values of our financial instruments. The carrying amounts of cash and cash equivalents, accounts receivable and accounts payable approximated their fair value due to the short-term maturity of these instruments.

We employ a hierarchy which prioritizes the inputs we use to measure recurring fair value into three distinct categories based upon whether such inputs are observable in active markets or unobservable. We classify assets and liabilities in their entirety based on the lowest level of input that is significant to the fair value measurement. Our methodology for categorizing assets and liabilities that are measured at fair value pursuant to this hierarchy gives the highest priority to unadjusted quoted prices in active markets and the lowest level to unobservable inputs as outlined below:

•
Level 1 – Inputs represent unadjusted quoted prices in active markets for identical assets or liabilities;
•
Level 2 – Inputs include quoted prices for similar assets and liabilities in active markets that are either directly or indirectly observable; and
•
Level 3 – Inputs are unobservable and considered significant to fair value measurement.

We utilize a mid-market pricing convention, or the "market approach," for valuation for assigning fair value to our derivative assets and liabilities. Our credit exposure for over-the-counter derivatives is directly with our counterparty and continues until the maturity or termination of the contracts. As appropriate, valuations are adjusted for various factors such as credit and liquidity considerations.
Property, plant and equipment 
Property, plant and equipment

We capitalize expenditures related to property, plant and equipment that have a useful life greater than one year. We also capitalize expenditures that improve or extend the useful life of an asset. Maintenance and repair costs, including any planned major maintenance activities, are expensed as incurred.

We record property, plant, and equipment at cost and recognize depreciation expense on a straight-line basis over the related estimated useful lives of the assets which range from 3 to 40 years. Our determination of the useful lives of property, plant and equipment requires us to make various assumptions, including the supply of and demand for hydrocarbons in the markets served by our assets, normal wear and tear of the facilities, and the extent and frequency of maintenance programs. We record depreciation using the group method of depreciation, which is commonly used by pipelines, utilities and similar assets.

We classify long-lived assets to be disposed of through sales that meet specific criteria as held for sale. We cease depreciating those assets effective on the date the asset is classified as held for sale. We record those assets at the lower of their carrying value or the estimated fair value less the cost to sell. Until the assets are disposed of, our estimate of fair value is re-determined when related events or circumstances change.
Impairment of long lived Assets 
Impairment of long lived Assets

We evaluate the recoverability of our property, plant and equipment and intangible assets with definite lives when events or circumstances indicate we may not recover the carrying amount of the assets. We continually monitor our operations, the market, and business environment to identify indicators that could suggest an asset or asset group may not be recoverable. We evaluate the asset or asset group for recoverability by estimating the undiscounted future cash flows expected to be derived from their use and disposition. These cash flow estimates require us to make projections and assumptions for many years into the future for pricing, demand, competition, operating cost, contract renewals, and other factors. An asset or asset group is considered impaired when the estimated undiscounted cash flows are less than the carrying amount. In that event, an impairment loss is recognized to the extent that the carrying amount of the asset or asset group exceeds its fair value as determined by quoted market prices in active markets or present value techniques. The determination of fair values using present value techniques requires us to make projections and assumptions regarding future cash flows and weighted average cost of capital. Any changes we make to these projections and assumptions could result in significant revisions to our evaluation of the recoverability of our property, plant and equipment and the recognition of an impairment loss in our consolidated statements of operations.
Goodwill and intangible assets 
Goodwill and intangible assets

We record goodwill for the excess of the cost of an acquisition over the fair value of the net assets of the acquired business. Goodwill is reviewed for impairment at least annually or more frequently if an event or change in circumstance indicates that an impairment may have occurred. We first assess qualitative factors to evaluate whether it is more likely than not that an impairment has occurred and it is therefore necessary to perform the two-step goodwill impairment test. If the two-step goodwill impairment test indicates that the goodwill is impaired, an impairment loss is recorded.

We record the estimated fair value of acquired customer contracts, relationships and dedicated acreage agreements as intangible assets. These intangible assets have definite lives and are subject to amortization on a straight-line basis over their economic lives, currently ranging between 5 years and 30 years. We assess intangible assets for impairment together with related underlying long-lived assets whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable.
Investment in unconsolidated affiliates 
Investment in unconsolidated affiliates

We hold membership interests in entities that own and operate natural gas pipeline systems and NGL and crude oil pipelines in and around Louisiana, Alabama, Mississippi and the Gulf of Mexico. While we have significant influence over these entities, we do not control them and therefore, they are accounted for using the equity method and are reported in Investment in unconsolidated affiliates in the consolidated balance sheets. We evaluate the recoverability of these investments on a regular basis and recognize impairment write downs if we determine a loss in value represents an other than temporary decline.
Deferred financing costs 
Deferred financing costs

Costs incurred in connection with our revolving credit agreements are deferred and charged to interest expense over the term of the related credit arrangement. Such amounts are included in Other assets, net in our consolidated balance sheets. Costs incurred in connection with our 8.50% Senior Notes and 3.77% Senior Notes are also deferred and charged to interest expense over the respective term of the agreements; however, these amounts are reflected as a reduction of the related obligation. Gains or losses on debt repurchases or extinguishment include any associated unamortized deferred financing costs.
Asset retirement obligations 
Asset retirement obligations

Asset retirement obligations ("ARO") are legal obligations associated with the retirement of tangible long-lived assets that result from the asset's acquisition, construction, development and operation. An ARO is initially measured at its estimated fair value. Upon initial recognition, we also record an increase to the carrying amount of the related long-lived asset. We depreciate the asset using the straight-line method over the period during which it is expected to provide benefits. After initial recognition, we revise the ARO to reflect the passage of time and for changes in the estimated amount or timing of cash flows.

We have legal obligations requiring us to decommission our offshore pipeline systems at retirement. In certain rate jurisdictions, we are permitted to include annual charges for removal costs in the regulated cost of service rates we charge our customers. Additionally, legal obligations exist for certain of our offshore right-of-way agreements due to requirements or landowner options to compel us to remove the pipe at final abandonment. Sufficient data exists with certain onshore pipeline systems to reasonably estimate the cost of abandoning or retiring a pipeline system. However, in some cases, there is insufficient information to reasonably determine the timing and/or method of settlement for purposes of estimating the fair value of the asset retirement obligation. In these cases, the asset retirement obligation cost is considered indeterminate because there is no data or information that can be derived from past practice, industry practice, management's experience, or the asset's estimated economic life. The useful lives of most pipeline systems are primarily derived from available supply resources and ultimate consumption of those resources by end users. Variables can affect the remaining lives of the assets which preclude us from making a reasonable estimate of the asset retirement obligation. Indeterminate asset retirement obligation costs will be recognized in the period in which sufficient information exists to reasonably estimate potential settlement dates and methods.
Commitments, contingencies and environmental liabilities 
Commitments, contingencies and environmental liabilities

We expense or capitalize, as appropriate, expenditures for ongoing compliance with environmental regulations that relate to past or current operations. We expense amounts we incur from the remediation of existing environmental contamination caused by past operations that do not benefit future periods by preventing or eliminating future contamination. We record liabilities for environmental matters when assessments indicate that remediation efforts are probable and the costs can be reasonably estimated. Estimates of environmental liabilities are based on currently available facts, existing technology and presently enacted laws and regulation taking into consideration the likely effects of inflation and other factors. These amounts also take into account our prior experience in remediating contaminated sites, other companies' clean-up experience and data released by government organizations. Our estimates are subject to revision in future periods based on actual cost or new information. We evaluate recoveries from insurance coverage separately from the liability and, when recovery is probable, we record an asset separately from the associated liability in our consolidated financial statements.

We recognize liabilities for other commitments and contingencies when, after fully analyzing the available information, we determine it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. When a range of probable loss can be estimated, we accrue the most likely amount or if no amount is more likely than another, we accrue the minimum of the range of probable loss. We expense legal costs associated with loss contingencies as such costs are incurred.
Noncontrolling interests 
Noncontrolling interests

Noncontrolling interests represent the minority interest holders' proportionate share of the equity in certain of our consolidated subsidiaries and are adjusted for the minority interest holders' proportionate share of the subsidiaries' earnings or losses each period.
Revenue recognition 
Revenue recognition

We recognize revenue from the sale of commodities (e.g., natural gas, crude oil, NGLs or condensate) as well as from the provision of gathering, processing, transportation or storage services when all of the following criteria are met: i) persuasive evidence of an exchange arrangement exists, ii) delivery has occurred or services have been rendered, iii) the price is fixed or determinable, and iv) collectability is reasonably assured. We recognize revenue from the sale of commodities and the related cost of product sold on a gross basis for those transactions where we act as the principal and take title to commodities that are purchased for resale.

Cost of sales

Cost of sales represent the cost of commodities purchased for resale or obtained in connection with certain of our customer revenue arrangements. These costs do not include an allocation of depreciation expense or direct operating costs.

Corporate expenses 
Corporate expenses

Corporate expenses include compensation costs for executives and administrative personnel, professional service fees, rent expense and other general and administrative expenses and are recognized as incurred.
Operational balancing agreements and natural gas imbalances 
Operational balancing agreements and natural gas imbalances

To facilitate deliveries of natural gas and provide for operational flexibility, we have operational balancing agreements in place with other interconnecting pipelines. These agreements ensure that the volume of natural gas a shipper schedules for transportation between two interconnecting pipelines equals the volume actually delivered. If natural gas moves between pipelines in volumes that are more or less than the volumes the shipper previously scheduled, a natural gas imbalance is created. The imbalances are settled through periodic cash payments or repaid in-kind through future receipt or delivery of natural gas. Natural gas imbalances are recorded in Other current assets or Accrued expenses and other current liabilities on our consolidated balance sheets at cost which approximates fair value.
Equity-based compensation 
Equity-based compensation

We award equity-based compensation to management, non-management employees and directors under our long-term incentive plans, which provide for the issuance of options, unit appreciation rights, restricted units, phantom units, other unit-based awards, unit awards or replacement awards, as well as tandem distribution equivalent rights ("DERs"). Compensation expense is measured by the fair value of the award at the date of grant as determined by management. Compensation expense is recognized in Corporate expenses and Direct operating expenses over the requisite service period of each award.
Income taxes 
Income taxes

The Partnership is not a taxable entity for U.S. federal income tax purposes or for the majority of states that impose an income tax. Taxes on our net income are generally borne by our unitholders through the allocation of taxable income. American Midstream Blackwater, LLC, a subsidiary of the Partnership, owns a subsidiary that has operations which are subject to both federal and state income taxes. We account for income taxes of that subsidiary using the asset and liability approach. If it is more than likely that a deferred tax asset will not be realized, a valuation allowance is recognized.

Margin tax expense results from the enactment of laws by the State of Texas that apply to entities organized as partnerships and is included in Income tax expense in our consolidated statements of operations. The Texas margin tax is computed on the portion of our taxable margin which is apportioned to Texas.

Net income (loss) for financial statement purposes may differ significantly from taxable income (loss) allocable to unitholders as a result of differences between the financial reporting and income tax bases of our assets and liabilities and the taxable income allocation requirement under our Partnership Agreement. The aggregate difference in the basis of our net assets for financial and tax reporting purposes cannot be readily determined because information regarding each partner's tax attributes in us is not available.
Accumulated other comprehensive income (loss) 
Accumulated other comprehensive income (loss)

Accumulated other comprehensive income (loss) is comprised solely of adjustments related to the Partnership's postretirement benefit plan.

Limited partners' net income (loss) per unit 
Limited partners' net income (loss) per unit

We compute earnings per unit using the two-class method. The two-class method requires that securities that meet the definition of a participating security be considered for inclusion in the computation of basic earnings per unit. Under the two-class method, earnings per unit is calculated as if all of the earnings for the period were distributed under the terms of the Partnership Agreement, regardless of whether the General Partner has discretion over the amount of distributions to be made in any particular period, whether those earnings would actually be distributed during a particular period from an economic or practical perspective, or whether the General Partner has other legal or contractual limitations on its ability to pay distributions that would prevent it from distributing all of the earnings for a particular period.

The two-class method does not impact our overall net income or other financial results; however, in periods in which aggregate net income exceeds our aggregate distributions for such period, it will have the impact of reducing net income per limited partner unit. This result occurs as a larger portion of our aggregate earnings, as if distributed, is allocated to the incentive distribution rights of the General Partner, even though we make distributions on the basis of available cash and not earnings. In periods in which our aggregate net income does not exceed our aggregate distributions for such period, the two-class method does not have any impact on our calculation of earnings per limited partner unit.
New accounting pronouncements 
New Accounting Pronouncements

Recently Adopted Accounting Standards

In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2015-03, Simplifying the Presentation of Debt Issuance Costs. This update requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. ASU 2015-03 is effective for fiscal years beginning after December 15, 2015, including interim periods therein, and is applied retrospectively. Early adoption is permitted for financial statements that have not been previously issued. ASU 2015-15, Presentation and Subsequent Measurement of Debt Issue Costs Associated with Line of Credit Arrangements, was subsequently issued to address the absence of authoritative guidance for debt issuance costs related to line-of-credit arrangements and states that the Securities and Exchange Commission ("SEC") staff will not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement.

The Partnership adopted the requirements of ASU No. 2015-03 effective January 1, 2016 and classifies the debt issuance costs applicable to its 8.50% Senior Notes and 3.77% Senior Notes as a reduction of the related debt obligation. Additionally, the Partnership continues to classify the debt issuance costs relating to its Credit Agreement within Other assets, net as allowed by ASU No. 2015-15.
 
In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805). This update requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 is effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. The Partnership adopted the updated guidance effective January 1, 2016 without impact to its financial statements.

Accounting Standards Issued Not Yet Adopted

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which amends the existing accounting guidance for revenue recognition. The update requires an entity to recognize revenue in a manner that depicts the transfer of goods or services to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU No. 2015-14 was subsequently issued and deferred the effective date to annual reporting periods beginning after December 15, 2017, including interim reporting periods within that period. In March 2016, the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal Versus Agent Considerations, as further clarification on principal versus agent considerations. In April 2016, the FASB issued ASU No. 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing as further clarification on identifying performance obligations and the licensing implementation guidance. In May 2016, the FASB issued ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, as clarifying guidance on specific narrow scope improvements and practical expedients. We are in the process of reviewing our various customer arrangements in order to determine the impact that these updates will have on our consolidated financial statements and related disclosures. We have engaged a third-party consultant to assist with our review, which we currently expect to complete in the third quarter of 2017.

In February 2016, the FASB issued ASU No. 2016-02 (Topic 842) "Leases" which supersedes the lease recognition requirements in Accounting Standards Codification Topic 840, "Leases". Under ASU No. 2016-02 lessees are required to recognize assets and liabilities on the balance sheet for most leases and provide enhanced disclosures. Leases will continue to be classified as either finance or operating. ASU No. 2016-02 is effective for annual reporting periods, and interim periods within those years beginning after December 15, 2018. Entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements, and there are certain optional practical expedients that an entity may elect to apply. Full retrospective application is prohibited and early adoption by public entities is permitted. Based upon our evaluation to date, we anticipate that the adoption of ASU 2016-02 will have a material effect on our consolidated financial statements as we will be required to reflect our various lease obligations and associated asset use rights on our consolidated balance sheets. The adoption may also impact our debt covenant compliance and may require us to modify or replace certain of our existing information systems. We have not yet determined the timing or manner in which we will implement the updated guidance.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 320): Classification of Cash Receipts and Cash Payments, which addresses eight specific cash flow issues with the objective of reducing the existing diversity of presentation and classification in the statement of cash flows. ASU No. 2016-15 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal periods. Early adoption is permitted, but only if all aspects are adopted in the same period. The Partnership is currently evaluating the impact this update will have on its consolidated statements of cash flows and related disclosures.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash, which aims to improve the disclosure of the change during the period in total cash, cash equivalents and amounts generally described as restricted cash or restricted cash equivalents. Amounts generally described as restricted cash or restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts on the statement of cash flows. The update is effective beginning first quarter of 2018. Early adoption is permitted, but it must occur in the first interim period. Any adjustments required in early adoption of this update should be reflected as of the beginning of the fiscal year that includes the interim period and should be applied using a retrospective transition method to each period. The Partnership is evaluating the impact that this update will have on our consolidated statement of cash flows and related disclosures.
Discontinued Operations (Tables)
Schedule of disposal groups
The following tables summarize the financial information related to the Propane Business for the corresponding years.



Consolidated Statements of Operations
 
Year Ended December 31,
 
2016
 
2015
 
2014
 
(in thousands)
 
 
 
 
 
 
Total revenues
$
137,896

 
$
163,583

 
$
181,843

Costs and Expenses
 
 
 
 
 
Costs of sales
49,672

 
62,621

 
116,924

Direct operating expenses
51,828

 
55,751

 
51,495

Corporate expenses
9,992

 
12,508

 
12,279

Depreciation, amortization and accretion
15,936

 
17,261

 
14,709

Loss on sale of assets, net
2,182

 
1,060

 
993

Loss on impairment of goodwill
12,802

 
—

 
—

  Total expenses
142,412

 
149,201

 
196,400

 
 
 
 
 
 
Operating (loss) income
(4,516
)
 
14,382

 
(14,557
)
 
 
 
 
 
 
Other Income(expense)
 
 
 
 
 
Interest expense
(36
)
 
(43
)
 
(61
)
Other income
374

 
272

 
434

Income (loss) from discontinued operations before income tax benefit (expense)
(4,178
)
 
14,611

 
(14,184
)
 
 
 
 
 
 
Income tax benefit (expense)
2

 
(3
)
 
(1
)
Net income (loss) from discontinued operations
$
(4,176
)
 
$
14,608

 
$
(14,185
)

 
Consolidated Balance Sheets

The current and non-current assets and liabilities of the Propane Business are as follows:
 
 
December 31,
 
 
2016
 
2015
 
 
(in thousands)
ASSETS
 
 
 
 
Current assets
 
 
 
 
   Accounts receivable, net
 
$
13,055

 
$
14,736

   Unbilled revenue
 
2,736

 
3,506

   Inventory
 
4,785

 
3,946

   Other current assets
 
2,151

 
451

Total current assets of discontinued operations
 
22,727

 
22,639

 
 
 
 
 
Non-current assets
 
 
 
 
   Property, plant and equipment, net
 
78,395

 
90,194

   Goodwill
 
15,361

 
28,162

   Intangible assets, net
 
20,212

 
23,041

   Risk management assets
 
37

 
—

   Other assets, net
 
27

 
26

Total non-current assets of discontinued operations
 
114,032

 
141,423

      Total assets
 
$
136,759

 
$
164,062

 
 
 
 
 
LIABILITIES
 
 
 
 
Current liabilities
 
 
 
 
   Accounts payable
 
$
5,709

 
$
3,148

   Accrued expenses and other current liabilities
 
8,563

 
8,852

   Current portion of long-term debt
 
47

 
141

Total current liabilities of discontinued operations
 
14,319

 
12,141

 
 
 
 
 
Non-current liabilities
 
 
 
 
   Other liabilities
 
172

 
375

Total non-current liabilities of discontinued operations
 
172

 
375

Total liabilities
 
$
14,491

 
$
12,516


The following table summarizes other selected financial information related to the Propane Business:
 
 
Year ended December 31,
 
 
2016
 
2015
 
2014
 
 
(in thousands)
 
 
 
 
 
 
 
Depreciation
 
$
13,108

 
$
14,455

 
$
12,298

Amortization
 
2,828

 
2,806

 
2,411

Capital expenditures
 
6,549

 
17,503

 
16,398

 
 
 
 
 
 
 
Other operating non-cash items
 
 
 
 
 
 
      Impairment of goodwill
 
12,802

 
—

 
—

      Loss on sale of assets
 
2,182

 
1,060

 
993

      Unrealized (gain) loss on derivative contracts, net
 
(1,072
)
 
(11,764
)
 
12,691

 
 
 
 
 
 
 

Selected financial information for the portion of the Blackwater business sold which is included in Loss from discontinued operations, net of tax in the consolidated statement of operations is summarized below:
 
Years Ended December 31,
 
2015
 
2014
 
(in thousands)
Total revenues
$
74

 
$
474

Expenses
(196
)
 
(658
)
Impairment
—

 
(673
)
Loss on sale of assets
(150
)
 
(87
)
Income tax benefit
192

 
333

Loss from discontinued operations
$
(80
)
 
$
(611
)

We have elected to not separately present the cash flows from operating, investing and financing activities related to the discontinued operations described above in our consolidated statements of cash flows.
Financial information for the Mid-Continent Business which is included in Loss from discontinued operations in the consolidated statement of operations is summarized below:
 
Year Ended December 31,
 
2016
 
2015
 
2014
 
(in thousands)

 
 
 
 
 
Total revenues
$
11,495

 
$
429,784

 
$
967,480

Costs and Expenses
 
 
 
 
 
Costs of sales
11,687

 
426,886

 
961,428

Direct operating expenses
203

 
2,269

 
2,866

Loss on impairment of goodwill and assets held for sale
—

 
12,909

 
—

Depreciation, amortization and accretion
211

 
2,281

 
2,258

(Gain) loss on sale of assets, net
(114
)
 
119

 
229

  Total expenses
11,987

 
444,464

 
966,781

 
 
 
 
 
 
Operating (loss) income
(492
)
 
(14,680
)
 
699

 
 
 
 
 
 
Other income (expense)
(47
)
 
(271
)
 
(366
)
Income (loss) from discontinued operations before income tax expense
(539
)
 
(14,951
)
 
333

 
 
 
 
 
 
Income tax expense
—

 
—

 
—

Net income (loss) from discontinued operations
$
(539
)
 
$
(14,951
)
 
$
333

Financial information for the Bakken Business which is included in Loss from discontinued operations, net of tax in the consolidated statement of operations is summarized below:
 
Year Ended December 31, 2014
 
(in thousands)
Total revenues
$
7,865

Costs and Expenses
 
Cost of sales
5,254

Direct operating expenses
1,324

Corporate expenses
448

Depreciation, amortization and accretion
1,433

Loss on sale of assets, net
9,032

   Total expenses
17,491

 
 
Operating loss
(9,626
)
 
 
Interest expense
(4
)
Other income
22

Loss from discontinued operations before income tax expense
$
(9,608
)

Blackwater
Inventory (Tables)
Schedule of Inventory
Inventory consists of the following:

 
December 31,
 
 
2016
 
2015
 
 
(in thousands)
Crude oil
 
$
1,216

 
$
486

NGLs
 
288

 
274

Refined products
 
—

 
232

Materials, supplies and equipment
 
486

 
303

      Total inventory
 
$
1,990

 
$
1,295

Detail of Certain Asset Accounts (Tables)
Schedule of Other Current Assets
Other current assets consists of the following:
 
December 31,
 
2016
 
2015
 
(in thousands)
Prepaid insurance
$
9,702

 
$
5,187

Insurance receivables
1,624

 
84

Other receivables
2,997

 
2,680

Due from related parties
4,833

 
8,749

Risk management assets
469

 
365

Other assets
5,891

 
5,281

      Total other current assets
$
25,516

 
$
22,346



Risk Management Activities (Tables)
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] 
The following table summarizes the net notional volume buy (sell) of our outstanding commodity-related derivatives, excluding those derivatives that qualified for the normal purchase normal sale exception as of December 31, 2016 and 2015, none of which were designated as hedges for accounting purposes.
 
 
December 31, 2016
 
December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
Notional Volume
 
Maturity
 
Notional Volume
 
Maturity
Commodity Swaps:
 
 
 
 
 
 
 
 
Crude Oil Fixed Price (Barrels)
 
—
 
—
 
(93,000)
 
Jan 2016
Crude Oil Basis (Barrels)
 
180,000
 
Jan 2017 - Mar 2017
 
—
 
—
Derivatives and fair value 
 
 
December 31, 2016
 
December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
Notional Volume
 
Maturity
 
Notional Volume
 
Maturity
Commodity Swaps:
 
 
 
 
 
 
 
 
Crude Oil Fixed Price (Barrels)
 
—
 
—
 
(93,000)
 
Jan 2016
Crude Oil Basis (Barrels)
 
180,000
 
Jan 2017 - Mar 2017
 
—
 
—


Interest Rate Swaps

To manage the impact of the interest rate risk associated with our Credit Agreement, we enter into interest rate swaps from time to time, effectively converting a portion of the cash flows related to our long-term variable rate debt into fixed rate cash flows.
Notional Amount
Term
Fair Value
(in thousands)
 
(in thousands)
$200,000
January 3, 2017 thru September 3, 2019
$
1,912

$100,000
January 1, 2017 thru December 31, 2017
(71
)
$100,000
January 1, 2018 thru January 31, 2019
226

$100,000
January 1, 2018 thru December 31, 2021
3,090

$150,000
January 1, 2018 thru December 31, 2022
5,219

 
 
$
10,376

Fair value associated with commodity derivative instruments 
Our interest rate swaps, commodity swaps and weather derivatives were recorded in our consolidated balance sheets, under the following captions:
 
 
Gross Risk Management Position
 
Netting Adjustment
 
Net Risk Management Position
Balance Sheet Classification
 
December 31, 2016
 
December 31, 2015
 
December 31, 2016
 
December 31, 2015
 
December 31, 2016
 
December 31, 2015
 
 
(in thousands)
Other current assets
 
$
541

 
$
457

 
$
(72
)
 
$
(92
)
 
$
469

 
$
365

Risk management assets - long term
 
10,628

 
—

 
(1
)
 
—

 
10,627

 
—

Total assets
 
$
11,169

 
$
457

 
$
(73
)
 
$
(92
)
 
$
11,096

 
$
365

 
 
 
 
 
 
 
 
 
 
 
 
 
Accrued expenses and other current liabilities
 
$
(253
)
 
$
(92
)
 
$
72

 
$
92

 
$
(181
)
 
$
—

Other liabilities
 
(1
)
 
—

 
1

 
—

 
—

 
—

Total liabilities
 
$
(254
)
 
$
(92
)
 
$
73

 
$
92

 
$
(181
)
 
$
—


Realized and unrealized gains (losses) with commodity and interest rate derivative instruments 
For the years ended December 31, 2016, 2015 and 2014, the realized and unrealized gains (losses) associated with our commodity, interest rate and weather derivative instruments were recorded in our consolidated statements of operations, under the following captions:
 
 
Realized
 
Unrealized
 
 
(in thousands)
2016
 

Losses on commodity derivatives, net
 
$
(1,569
)
 
$
(48
)
Interest expense
 
(144
)
 
10,375

Direct operating expenses
 
(966
)
 
—

Total
 
$
(2,679
)
 
$
10,327

2015
 
 
 
 
Gains (losses) on commodity derivatives, net
 
$
1,632

 
$
(287
)
Interest expense
 
(425
)
 
373

Direct operating expenses
 
(913
)
 
—

Total
 
$
294

 
$
86

2014
 
 
 
 
Gains on commodity derivatives, net
 
$
734

 
$
357

Interest expense
 
(707
)
 
284

Direct operating expenses
 
(1,035
)
 
—

Total
 
$
(1,008
)
 
$
641

Property, Plant and Equipment, Net (Tables)
Property, plant, and equipment, net
Property, plant and equipment, net. consists of the following:
 
 
Useful Life
(in years)
 
December 31,
2016
 
December 31,
2015
 
 
 
(in thousands)
Land
N/A
 
$
18,861

 
$
14,118

Construction in progress
N/A
 
128,519

 
56,134

Transportation equipment
5 to 15
 
20,010

 
22,125

Buildings and improvements
4 to 40
 
13,762

 
12,121

Processing and treating plants
8 to 40
 
120,977

 
102,111

Pipelines and compressors
3 to 40
 
804,815

 
775,486

Storage
3 to 40
 
146,408

 
144,780

Equipment
5 to 20
 
77,978

 
53,097

Total property, plant and equipment
 
 
1,331,330

 
1,179,972

Less accumulated depreciation
 
 
(264,722
)
 
(198,651
)
Property, plant and equipment, net
 
 
$
1,066,608

 
$
981,321

Goodwill and Intangible Assets, Net (Tables)
Schedule of Goodwill 
The following table presents activity in the Partnership's goodwill balance:
 
Gas Gathering and Processing Services
Liquid Pipelines and Services
Terminalling Services
Total
 
 
 
 
 
 
(in thousands)
Balance at January 1, 2015
$
125,974

$
146,219

$
88,466

$
360,659

Goodwill acquired during the year
—

—

—

—

Return of purchase price
(7,382
)
—

—

(7,382
)
Impairment charges
(118,592
)
(29,896
)
—

(148,488
)
Balance at December 31, 2015
—

116,323

88,466

204,789

Impairment charges
—

(2,654
)
—

(2,654
)
Balance at December 31, 2016
$
—

$
113,669

$
88,466

$
202,135

Schedule of finite-jived intangible assets 
Intangible assets, net, consist of the following:
 
December 31,
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
 
Gross carrying amount
 
Accumulated amortization
 
Net carrying amount
 
(in thousands)
Customer relationships
$
106,417

 
$
106,417

 
$
(23,245
)
 
$
(15,535
)
 
$
83,172

 
$
90,882

Customer contracts
94,692

 
94,692

 
(33,228
)
 
(24,388
)
 
61,464

 
70,304

Dedicated acreage
53,350

 
53,350

 
(4,439
)
 
(2,661
)
 
48,911

 
50,689

Collaborative arrangements
11,884

 
11,884

 
(601
)
 
—

 
11,283

 
11,884

Noncompete agreements
1,063

 
1,063

 
(1,000
)
 
(765
)
 
63

 
298

Other
198

 
198

 
(20
)
 
(16
)
 
178

 
182

 
$
267,604

 
$
267,604

 
$
(62,533
)
 
$
(43,365
)
 
$
205,071

 
$
224,239

Investment in Unconsolidated Affiliates (Tables)
Investments in and Advances to Affiliates 
The following table presents activity in the Partnership's investments in unconsolidated affiliates:
 
 
Delta House (1)
 
Emerald Transactions
 
 
 
 
 
 
FPS
 
OGL
 
Destin
 
Tri-States
 
Okeanos
 
Wilprise
 
MPOG
 
Total
 
 
 
 
 
 
(in thousands)
 
 
 
 
 
 
Ownership % at December 31, 2016
20.1
%
 
20.1
%
 
49.7
%
 
16.7
%
 
66.7
%
 
25.3
%
 
66.7
%
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Balance at December 31, 2013
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
Investments
—

 
—

 
—

 
—

 
—

 
—

 
12,000

 
12,000

 
Earnings in unconsolidated affiliates
—

 
—

 
—

 
—

 
—

 
—

 
348

 
348

 
Contributions
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
Distributions
—

 
—

 
—

 
—

 
—

 
—

 
(1,980
)
 
(1,980
)
Balance at December 31, 2014
—

 
—

 
—

 
—

 
—

 
—

 
10,368

 
10,368

 
Investments
40,559

 
25,144

 
—

 
—

 
—

 
—

 
—

 
65,703

 
Earnings in unconsolidated affiliates
5,457

 
2,013

 
—

 
—

 
—

 
—

 
731

 
8,201

 
Contributions
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
Distributions
(12,551
)
 
(4,097
)
 
—

 
—

 
—

 
—

 
(3,920
)
 
(20,568
)
Balance at December 31, 2015
33,465

 
23,060

 
—

 
—

 
—

 
—

 
7,179

 
63,704

 
Investments
55,461

 
3,255

 
122,830

 
56,681

 
27,451

 
5,064

 
—

 
270,742

 
Earnings in unconsolidated affiliates
21,022

 
9,260

 
3,946

 
1,633

 
3,642

 
437

 
218

 
40,158

 
Contributions
—

 
—

 
—

 
—

 
—

 
—

 
429

 
429

 
Distributions
(45,465
)
 
(10,125
)
 
(15,894
)
 
(3,292
)
 
(4,034
)
 
(557
)
 
(3,679
)
 
(83,046
)
Balance at December 31, 2016
$
64,483

 
$
25,450

 
$
110,882

 
$
55,022

 
$
27,059

 
$
4,944

 
$
4,147

 
$
291,987



(1) Represents direct and indirect ownership interests in Class A Units.
Schedule of Investments 
The following tables include summarized data for the entities underlying our equity method investments:
 
 
December 31,
 
 
2016
 
2015
 
 
(in thousands)
Current assets
 
$
120,167

 
$
182,264

Non-current assets
 
1,369,492

 
1,418,299

Current liabilities
 
133,085

 
146,490

Non-current liabilities
 
541,312

 
419,215


 
 
Years ended December 31,
 
 
2016
 
2015
 
2014
 
 
(in thousands)
Revenue
 
$
370,263

 
$
235,041

 
$
102,290

Operating expenses
 
99,084

 
90,453

 
72,775

Net income
 
261,200

 
135,083

 
28,173


Our investments in the unconsolidated affiliates underlying the Emerald Transactions were acquired in late April 2016. The following table presents information for each of these affiliates for the portion of 2016 that we held the related investments:

 
Emerald Transactions
 
Destin
 
Tri-States
 
Okeanos
 
Wilprise
Revenues
$
34,360

 
$
25,557

 
$
10,453

 
$
3,306

Net income
8,272

 
15,983

 
1,911

 
2,028

Partnership ownership %
49.7
%
 
16.7
%
 
66.7
%
 
25.3
%
Partnership share of investee net income
4,109

 
2,664

 
1,274

 
513

Basis difference amortization
(163
)
 
(1,031
)
 
2,368

 
(76
)
Earnings in unconsolidated affiliates
3,946

 
1,633

 
3,642

 
437

Accrued Expenses and Other Current Liabilities (Tables)
Schedule of accrued expenses and other current liabilities
Accrued expenses and other current liabilities consists of the following (in thousands):
 
 
December 31,
 
 
2016
 
2015
Capital expenditures
 
$
14,274

 
$
7,139

Employee compensation
 
8,438

 
6,198

Convertible preferred unit distributions
 
7,103

 
—

Current portion of asset retirement obligation
 
6,499

 
6,822

Accrued interest
 
5,743

 
1,838

Additional Blackwater acquisition consideration
 
5,000

 
—

Due to related parties
 
4,072

 
3,894

Royalties payable
 
3,926

 
4,163

Transaction costs
 
3,000

 
—

Customer deposits
 
148

 
1

Deferred financing costs
 
2,743

 
—

Taxes payable
 
1,186

 
1,146

Gas imbalances payable
 
1,098

 
413

Other
 
9,491

 
5,646

     Total accrued expenses and other current liabilities
 
$
72,721

 
$
37,260

Asset Retirement Obligations (Tables)
Schedule of reconciliation of the beginning and ending aggregate carrying amount of ARO liabilities
The following table presents activity in the Partnership's asset retirement obligations (in thousands):
 
Years Ended December 31,
 
2016
 
2015
Beginning balance
$
35,371

 
$
34,645

Liabilities assumed (1)
14,542

 
—

Revision in estimate
230

 
—

Expenditures
(858
)
 
(91
)
Accretion expense
1,577

 
817

Ending balance
50,862

 
35,371

Less: current portion
6,499

 
6,822

Noncurrent asset retirement obligation
$
44,363

 
$
28,549



(1) Includes $14.3 million assumed in connection with the Gulf of Mexico Pipeline acquisition described in Note 2.
Convertible Preferred Units (Tables)
Schedule of preferred units
Our convertible preferred units consist of the following:

 
Series A
 
Series C
 
Series D
 
Units
$
 
Units
$
 
Units
$
 
(in thousands)
December 31, 2013
5,279

$
94,811

 
—

$
—

 
—

$
—

Issuance of units
—

—

 
—

—

 
—

—

Paid in kind unit distributions
466

13,154

 
—

—

 
—

—

December 31, 2014
5,745

107,965

 
—

—

 
—

—

Issuance of units
2,571

44,769

 
—

—

 
—

—

Paid in kind unit distributions
894

16,978

 
—

—

 
—

—

December 31, 2015
9,210

169,712

 
—

—

 
—

—

Issuance of units
—

—

 
8,571

115,457

 
2,333

34,475

Paid in kind unit distributions
897

11,674

 
221

2,772

 
—

—

December 31, 2016
10,107

$
181,386

 
8,792

$
118,229

 
2,333

$
34,475

Debt Obligations (Tables)
Outstanding borrowings 
Our outstanding debt consists of the following as of December 31, 2016:
 
AMID
 
JPE
 
8.5% Senior
 
3.77% Senior
 
 
 
 
 
Revolving Credit
 
Revolving Credit
 
Notes due
 
Notes due
 
Other
 
 
 
 Agreement (1)
 
 Agreement (1)
 
2021
 
2031
 
Debt
 
Total
 
(in thousands)
Balance
$
711,250

 
$
177,000

 
$
300,000

 
$
60,000

 
$
3,762

 
$
1,252,012

Less unamortized deferred financing costs and discount
—

 
—

 
(8,691
)
 
(2,345
)
 
—

 
(11,036
)
  Subtotal
711,250

 
177,000

 
291,309

 
57,655

 
3,762

 
1,240,976

Less current portion
—

 
—

 
—

 
(1,676
)
 
(3,762
)
 
(5,438
)
  Non-current portion
$
711,250

 
$
177,000

 
$
291,309

 
$
55,979

 
$
—

 
$
1,235,538



Our outstanding debt consists of the following as of December 31, 2015:
 
AMID
 
JPE
 
 
 
 
 
Revolving Credit
 
Revolving Credit
 
Other
 
 
 
 Agreement (1)
 
 Agreement (1)
 
Debt
 
Total
 
(in thousands)
Balance
$
525,100

 
$
162,000

 
$
3,498

 
$
690,598

Less current portion
—

 
—

 
(2,758
)
 
(2,758
)
  Non-current portion
$
525,100

 
$
162,000

 
$
740

 
$
687,840


______________________
(1) Unamortized deferred financing costs related to the Credit Agreement are included in Other assets, net.
Debt instrument redemption 
On and after December 15, 2018, the Issuers may redeem all or a part of the 8.50% Senior Notes, at the redemption prices (expressed as percentages of principal amount) set forth below, plus accrued and unpaid interest, if redeemed during the twelve-month period beginning on December 15 of the years indicated below:
Year
Percentage
2018
104.250%
2019
102.125%
2020 and thereafter
100.000%
Partners' Capital (Tables)
Schedule for number of units outstanding 
The following table presents unit activity (in thousands):

 
 
General
Partner Interest
 
Limited Partner Interest
 
Series B Convertible Units
 
JPE Series D Units
Balances at December 31, 2013
 
185

 
13,394

 
—

 
—

Initial issuance of Series B Units
 
—

 
—

 
1,168

 
 
Issuance of Series B Units
 
—

 
—

 
87

 
 
Issuance of JPE Series D Units
 
—

 
—

 
—

 
1,008

Redemption of JPE Series D Units
 
—

 
—

 
—

 
(1,008
)
LTIP vesting
 
—

 
80

 
—

 
 
Issuance of GP units
 
207

 
—

 
—

 
 
Exercise of warrants
 
—

 
300

 
—

 
 
Issuance of common units in JP Development transaction
 
—

 
5,841

 
—

 
 
Issuance of common units
 
—

 
23,025

 
—

 
 
Balances at December 31, 2014
 
392

 
42,640

 
1,255

 
—

Issuance of Series B Units
 
—

 
—

 
95

 
—

LTIP vesting
 
—

 
58

 
—

 
—

Exercise of unit options
 
—

 
152

 
—

 
—

Issuance of GP units
 
144

 
—

 
—

 
—

Issuance of common units
 
—

 
7,654

 
—

 
—

Balances at December 31, 2015
 
536

 
50,504

 
1,350

 
—

Conversion of Series B Units
 
—

 
1,350

 
(1,350
)
 
—

Return of escrow units
 
—

 
(1,034
)
 
—

 
—

LTIP vesting
 
—

 
283

 
—

 
—

Issuance of GP units
 
144

 
—

 
—

 
—

Issuance of common units
 
—

 
248

 
—

 
—

Balances at December 31, 2016
 
680

 
51,351

 
—

 
—

Distributions Made to Limited Partner, by Distribution 
We made the following distributions (in thousands):
 
 
Years Ended December 31,
 
 
2016
 
2015
 
2014
Series A Units
 
 
 
 
 
 
Cash:
 
 
 
 
 
 
Paid
 
$
4,935

 
$
—

 
$
2,658

Accrued
 
2,514

 
—

 
—

Paid-in-kind units
 
11,674

 
16,978

 
13,154

Total
 
19,123

 
16,978

 
15,812

 
 
 
 
 
 
 
Series B Units
 
 
 
 
 
 
Paid-in-kind units
 
—

 
1,373

 
2,220

Total
 
—

 
1,373

 
2,220

 
 
 
 
 
 
 
Series C Units
 
 
 
 
 
 
Cash:
 
 
 
 
 
 
Paid
 
3,089

 
—

 
—

Accrued
 
3,626

 
—

 
—

Paid-in-kind units
 
2,772

 
—

 
—

Total
 
9,487

 
—

 
—

 
 
 
 
 
 
 
Series D Units
 
 
 
 
 
 
AMID Series D Units Accrued
 
963

 
—

 
—

     JPE Series D Units Paid-in-kind units
 
—

 
—

 
2,436

Total
 
963

 
—

 
2,436

 
 
 
 
 
 
 
Limited Partner Units
 
 
 
 
 
 
Cash:
 
 
 
 
 
 
Paid
 
101,561

 
93,622

 
114,612

Accrued
 
—

 
—

 
—

Total
 
101,561

 
93,622

 
114,612

 
 
 
 
 
 
 
General Partner Units
 
 
 
 
 
 
Cash:
 
 
 
 
 
 
Paid
 
2,551

 
6,789

 
2,695

Accrued
 
—

 
—

 
—

Additional Blackwater acquisition consideration
 
5,000

 
—

 
—

Total
 
7,551

 
6,789

 
2,695

 
 
 
 
 
 
 
Summary
 
 
 
 
 
 
Cash
 
 
 
 
 
 
Paid
 
112,136

 
100,411

 
119,965

Accrued
 
7,103

 
—

 
—

Paid-in-kind units
 
14,446

 
18,351

 
17,810

Additional Blackwater acquisition consideration
 
5,000

 
—

 
—

Total
 
$
138,685

 
$
118,762

 
$
137,775


Net Income (Loss) per Limited Partner Unit (Tables)
Schedule of earnings per share

The calculation of basic and diluted limited partners' net loss per common unit is summarized below (in thousands, except per unit amounts):

 
Years Ended December 31,
 
2016
 
2015
 
2014
Net loss from continuing operations
$
(43,829
)
 
$
(199,418
)
 
$
(55,496
)
Less: Net income (loss) attributable to noncontrolling interests
2,766

 
(13
)
 
3,993

Net loss from continuing operations attributable to the Partnership
(46,595
)
 
(199,405
)
 
(59,489
)
Less:
 
 
 
 
 
Distributions on Series A Units
19,138

 
16,978

 
14,492

Distributions on Series C Units
9,487

 
—

 
—

Distributions on Series D Units
963

 
—

 
—

Distributions on Series B Units
—

 
1,373

 
2,220

Net income (loss) from continuing operations attributable to JPE preferred units
—

 
—

 
656

Net income (loss) from continuing operations attributable to predecessor capital
—

 
—

 
(2,014
)
General partner's distributions
2,550

 
6,790

 
2,694

General partner's share in undistributed loss
(1,691
)
 
(3,498
)
 
(1,325
)
Net loss from continuing operations attributable to Limited Partners
(77,042
)
 
(221,048
)
 
(76,212
)
Net loss from discontinued operations attributable to Limited Partners
(4,715
)
 
(423
)
 
(14,545
)
Net loss attributable to Limited Partners
$
(81,757
)
 
$
(221,471
)
 
$
(90,757
)
 
 
 
 
 
 
Weighted average number of common units used in computation of Limited Partners' net loss per common unit - basic and diluted
51,176

 
45,050

 
27,524

 
 
 
 
 
 
Limited Partners' net loss from continuing operations per unit (basic and diluted)
$
(1.51
)
 
$
(4.91
)
 
$
(2.77
)
Limited Partners' net loss from discontinued operations per unit (basic and diluted)
(0.09
)
 
(0.01
)
 
(0.52
)
Limited Partners' net loss per common unit - basic and diluted (1)
$
(1.60
)
 
$
(4.92
)
 
$
(3.29
)
 
_______________________
(1) Potential common unit equivalents are antidilutive for all periods and, as a result, have been excluded from the determination of diluted limited partners' net income (loss) per common unit.
Long-Term Incentive Plan (Tables)
Schedule of restricted stock and restricted stock units activity 
The following table presents phantom units activity for the years ended December 31, 2016 and 2015: 
 
 
Units
 
Weighted Average
Grant date Fair Value
 
 
 
 
 
Outstanding units at December 2014
 
—

 
$
—

Granted
 
287,750

 
22.25

Vested
 
(4,766
)
 
22.34

Forfeited
 
(56,005
)
 
21.23

Outstanding units at December 2015
 
226,979

 
$
22.5

Granted
 
209,507

 
9.23

Vested
 
(55,778
)
 
19.51

Forfeited
 
(67,716
)
 
18.74

Outstanding units at December 2016
 
312,992

 
$
14.96

The following table summarizes activity in our phantom unit-based awards for the years ended December 31, 2016, 2015 and 2014:
 
 
Units
 
Weighted-Average Grant Date Fair Value Per Unit
 
Aggregate Intrinsic Value (1) (In thousands)
Outstanding units at December 2013
 
75,529

 
$
17.62

 
$
2,045

Granted
 
188,946

 
20.80

 
 
Forfeited
 
(12,009
)
 
(18.28
)
 
 
Vested
 
(51,334
)
 
(20.89
)
 
 
Outstanding units at December 2014
 
201,132

 
$
19.85

 
$
3,964

Granted
 
546,329

 
12.25

 
 
Forfeited
 
(31,298
)
 
(15.62
)
 
 
Vested
 
(146,404
)
 
(18.47
)
 
 
Outstanding units at December 2015
 
569,759

 
$
13.15

 
$
4,609

Granted
 
1,374,226

 
2.14

 
 
Forfeited
 
(411,794
)
 
(2.60
)
 
 
Vested
 
(286,348
)
 
(12.18
)
 
 
Outstanding units at December 2016
 
1,245,843

 
$
4.72

 
$
22,674



(1) The intrinsic value of phantom units was calculated by multiplying the closing market price of our underlying stock on December 31, 2016, 2015 and 2014 by the number of phantom units.
Schedule of stock options, valuation assumptions 
The Black-Scholes pricing model was used to determine the fair value of our options grants using the following assumptions:
 
Years Ended December 31,
 
2016
 
2015
Weighted average common unit price volatility
61.1
%
 
47.0
%
Expected distribution yield
12.6
%
 
26.3
%
Weighted average expected term (in years)
4.10

 
3.5

Weighted average risk-free rate
1.1
%
 
1.3
%
Options, grants in period, weighted average grant date fair value 
The following table summarizes our option activity for the years ended December 31, 2016 and 2015:
 
 
Units
 
Weighted-Average Exercise Price
 
Weighted-Average Grant Date Fair Value per Unit
 
Aggregate Intrinsic Value (1) (In thousands)
 
Weighted Average Remaining Contractual Life (Years)
Outstanding at December 31, 2014
 
—

 
$
—

 
$
—

 
$
—

 
—

Granted
 
200,000

 
7.50

 
0.33

 
—

 
—

Vested
 
—

 
—

 
 
 
—

 
—

Forfeited
 
—

 
—

 
 
 
—

 
—

Outstanding at December 31, 2015
 
200,000

 
$
7.50

 
$
0.33

 
$
118

 
4.2

Granted
 
75,000

 
13.13

 
2.65

 
—

 
—

Vested
 
—

 
—

 
 
 
—

 
—

Forfeited
 
—

 
—

 
 
 
—

 
—

Outstanding at December 31, 2016
 
275,000

 
$
9.03

 
$
0.96

 
$
2,522

 
5.0


(1) The intrinsic value of the stock option is the amount by which the current market value of the underlying stock exceeds the exercise price of the option.
Income Taxes (Tables)
Schedule of components of income tax (expense) benefit 

Income tax (expense) benefit for the years ended December 31, 2016, 2015 and 2014 is as follows:
 
Years Ended December 31,
 
2016
 
2015
 
2014
Current income tax expense
$
(521
)
 
$
(648
)
 
$
(146
)
Deferred income tax expense
(2,059
)
 
(1,237
)
 
(710
)
 
 
 
 
 
 
Effective income tax rate
6.3
%
 
1.0
%
 
1.6
%
Schedule of effective income tax rate reconciliation 
A reconciliation of our expected income tax (expense) benefit calculated at the U.S. federal statutory rate of 34% to our actual tax (expense) for the years ended December 31, 2016, 2015 and 2014 is as follows:

 
Years Ended December 31,
 
2016
 
2015
 
2014
Net income (loss) before income tax expense
$
(41,249
)
 
$
(197,533
)
 
$
(54,640
)
US Federal statutory tax rate
34
%
 
34
%
 
34
%
Federal income tax (expense) benefit at statutory rate
14,025

 
67,161

 
18,578

Reconciling items:
 
 
 
 
 
    Partnership loss not subject to income tax (benefit)
(15,800
)
 
(68,048
)
 
(18,936
)
    State and local tax expense
(800
)
 
(857
)
 
(459
)
    Other
(5
)
 
(141
)
 
(39
)
Income tax expense
$
(2,580
)
 
$
(1,885
)
 
$
(856
)

Schedule of deferred tax assets and liabilities 
The Partnership’s deferred tax assets and liabilities as of December 31, 2016 and 2015 are summarized below:
 
December 31,
 
2016
 
2015
Deferred tax assets:
 
 
 
    Net operating loss carryforwards
$
6,300

 
$
7,570

    Other
577

 
493

    Total deferred tax assets
6,877

 
8,063

Deferred tax liabilities:
 
 
 
    Property, plant and equipment
(15,082
)
 
(14,236
)
Deferred income tax liability, net
$
(8,205
)
 
$
(6,173
)
Commitments and Contingencies (Tables)
Future non-cancelable commitments related to certain contractual obligations

The Partnership had the following non-cancelable contractual commitments as of December 31, 2016:
 
 
Revolving Credit Agreements
 
3.77% Senior Notes
 
8.50% Senior Notes (1)
 
Asset Retirement Obligation (2)
 
     Other
 
Total
 
 
(in thousands)
2017
 
$
—

 
$
1,677

 
$
—

 
$
6,499

 
$
7,428

 
$
15,604

2018
 
—

 
806

 
—

 
—

 
4,507

 
5,313

2019
 
888,250

 
2,233

 
—

 
—

 
4,389

 
894,872

2020
 
—

 
2,299

 
—

 
—

 
2,670

 
4,969

2021
 
—

 
4,430

 
300,000

 
—

 
2,244

 
306,674

Thereafter
 
—

 
48,555

 
—

 
44,363

 
17,991

 
110,909

 
 
$
888,250

 
$
60,000

 
$
300,000

 
$
50,862

 
$
39,229

 
$
1,338,341


(1) Upon closing of the JPE Merger, the proceeds from the 8.50% Senior Notes were used to repay the JPE Credit Agreement.
(2) In some cases, there is insufficient information to reasonably determine the timing and/or method of settlement for purposes of estimating the fair value of the asset retirement obligation. In these cases, the asset retirement obligation cost is considered indeterminate because there is no data or information that can be derived from past practice, industry practice, management's experience, or the asset's estimated economic life.

Supplemental Cash Flow Information (Tables)
Schedule of cash flow, supplemental disclosures
Supplemental cash flows and non-cash transactions consists of the following (in thousands):

 
Years Ended December 31,
 
2016
 
2015
 
2014
Supplemental cash flow information
 
 
 
 
 
Interest payments, net of capitalized interest
$
22,303

 
$
16,540

 
$
13,905

Cash paid for taxes
530

 
450

 
108

Supplemental non-cash information
 
 
 
 
 
Increase (decrease) in accrued property, plant and equipment purchases
$
8,533

 
$
(21,841
)
 
$
35,018

Contributions from general partner
7,500

 
4,350

 
—

Acquisitions partially funded by the issuance of common units
—

 
3,442

 
414,396

Assets acquired under capital lease
139

 
—

 
177

Issuance of Series C Units and Warrant in connection with the Emerald Transactions
120,000

 
—

 
—

Accrued cash distributions on convertible preferred units
7,103

 
—

 
—

Paid-in-kind distributions on convertible preferred units
14,446

 
16,978

 
13,154

Paid-in-kind distributions on Series B Units
—

 
1,373

 
2,220

Paid-in-kind distributions on JPE Series D units
—

 
—

 
2,436

Cancellation of escrow units
6,817

 
—

 
—

Additional Blackwater acquisition consideration
5,000

 
—

 
—

Reportable Segments (Tables)
Segment information for the periods 
The following tables set forth our segment financial information for the periods indicated:

 
 
December 31, 2016
 
 
Gas Gathering and Processing Services
Liquid Pipelines and Services
Natural Gas Transportation Services
Offshore Pipelines and Services
Terminalling Services
Total
 
 
(in thousands)
Commodity sales
 
$
91,444

$
304,502

$
21,999

$
6,812

$
14,655

$
439,412

Services
 
22,558

19,063

18,109

40,502

50,999

151,231

Gains (losses) on commodity derivatives, net
 
(833
)
(341
)
—

(7
)
(436
)
(1,617
)
Total Revenue
 
113,169

323,224

40,108

47,307

65,218

589,026

 
 
 
 
 
 
 
 
Cost of sales
 
63,832

293,618

21,288

3,049

11,564

393,351

Direct operating expenses
 
33,802

10,091

5,923

10,945

10,783

71,544

Corporate expenses
 
 
 
 
 
 
89,438

Depreciation, amortization, and accretion
 
 
 
 
 
 
90,882

Loss on sale of assets, net
 
 
 
 
 
 
688

Loss on impairment of plant, property and equipment
 
 
 
 
 
 
697

Loss on impairment of goodwill
 
 
 
 
 
 
2,654

Interest expense
 
 
 
 
 
 
21,433

Earnings in unconsolidated affiliates
 
 
 
 
 
 
(40,158
)
Other (income) expense
 
 
 
 
 
 
(254
)
Income tax expense
 
 
 
 
 
 
2,580

Income (loss) from continuing operations
 
 
 
 
 
 
(43,829
)
Loss from discontinuing operations, net of tax
 
 
 
 
 
 
(4,715
)
Net income (loss)
 
 
 
 
 
 
(48,544
)
Net income (loss) attributable to non-controlling interest
 
 
 
 
 
 
2,766

Net income (loss) attributable to partnership
 
 
 
 
 
 
$
(51,310
)
 
 
 
 
 
 
 
 
Segment gross margin
 
$
48,245

$
31,556

$
18,616

$
82,346

$
42,872

 

 
 
December 31, 2015
 
 
Gas Gathering and Processing Services
Liquid Pipelines and Services
Natural Gas Transportation Services
Offshore Pipelines and Services
Terminalling Services
Total
 
 
(in thousands)
Commodity sales
 
$
107,680

$
457,448

$
23,972

$
13,798

$
10,343

$
613,241

Services
 
30,196

23,008

16,035

21,457

45,022

135,718

Gains (losses) on commodity derivatives, net
 
1,240

—

—

84

21

1,345

Total Revenue
 
139,116

480,456

40,007

35,339

55,386

750,304

 
 
 
 
 
 
 
 
Cost of sales
 
72,960

454,057

21,858

9,914

8,893

567,682

Direct operating expenses
 
35,250

9,912

6,728

9,425

10,414

71,729

Corporate expenses
 
 
 
 
 
 
65,327

Depreciation, amortization, and accretion
 
 
 
 
 
 
81,335

Loss on sale of assets, net
 
 
 
 
 
 
2,860

Loss on impairment of goodwill
 
 
 
 
 
 
148,488

Interest expense
 
 
 
 
 
 
20,077

Earnings in unconsolidated affiliates
 
 
 
 
 
 
(8,201
)
Other (income) expense
 
 
 
 
 
 
(1,460
)
Income tax expense
 
 
 
 
 
 
1,885

Income (loss) from continuing operations
 
 
 
 
 
 
(199,418
)
Loss from discontinuing operations, net of tax
 
 
 
 
 
 
(423
)
Net income (loss)
 
 
 
 
 
 
(199,841
)
Net income (loss) attributable to non-controlling interest
 
 
 
 
 
 
(13
)
Net income (loss) attributable to partnership
 
 
 
 
 
 
$
(199,828
)
 
 
 
 
 
 
 
 
Segment gross margin
 
$
65,692

$
26,399

$
18,073

$
33,613

$
36,079

 



 
 
December 31, 2014
 
 
Gas Gathering and Processing Services
Liquid Pipelines and Services
Natural Gas Transportation Services
Offshore Pipelines and Services
Terminalling Services
Total
 
 
(in thousands)
Commodity sales
 
$
148,198

$
470,936

$
70,964

$
20,044

$
11,521

$
721,663

Services
 
15,248

22,239

12,925

24,426

41,357

116,195

Gains (losses) on commodity derivatives, net
 
1,050

—

—

41

—

1,091

Total Revenue
 
164,496

493,175

83,889

44,511

52,878

838,949

 
 
 
 
 
 
 
 
Cost of sales
 
112,719

468,137

70,100

15,133

6,859

672,948

Direct operating expenses
 
21,197

7,209

6,975

11,142

11,525

58,048

Corporate expenses
 
 
 
 
 
 
60,465

Depreciation, amortization, and accretion
 
 
 
 
 
 
57,818

Loss on sale of assets, net
 
 
 
 
 
 
4,087

Loss on impairment of plant, property and equipment
 
 
 
 
 
 
21,344

Interest expense
 
 
 
 
 
 
16,497

Earnings in unconsolidated affiliates
 
 
 
 
 
 
(348
)
Other (income) expense
 
 
 
 
 
 
1,096

Loss on extinguishment of debt
 
 
 
 
 
 
1,634

Income tax expense
 
 
 
 
 
 
856

Income (loss) from continuing operations
 
 
 
 
 
 
(55,496
)
Loss from discontinuing operations, net of tax
 
 
 
 
 
 
(24,071
)
Net income (loss)
 
 
 
 
 
 
(79,567
)
Net income (loss) attributable to non-controlling interest
 
 
 
 
 
 
3,993

Net income (loss) attributable to partnership
 
 
 
 
 
 
$
(83,560
)
 
 
 
 
 
 
 
 
Segment gross margin
 
$
51,213

$
25,038

$
13,691

$
29,089

$
34,493

 
Reconciliation of assets from segment to consolidated 
A reconciliation of total assets by segment to the amounts included in the consolidated balance sheets is as follows:

 
December 31,
 
2016
 
2015
Segment assets:
(in thousands)
Gas Gathering and Processing Services
$
530,889

 
$
496,014

Liquid Pipelines and Services
425,389

 
434,395

Natural Gas Transportation Services
221,604

 
146,927

Offshore Pipelines and Services
400,193

 
190,271

Terminalling Services
299,534

 
291,130

   Other (1)
334,953

 
19,716

   Discontinued operations
136,759

 
$
173,436

Total assets
$
2,349,321

 
$
1,751,889

_______________________
(1) Other assets not allocable to segments consist of investment in unconsolidated affiliates, restricted cash and other assets.
Quarterly Financial Data (Unaudited) (Tables)
Schedule of quarterly financial information
Summarized unaudited quarterly financial data for 2016 and 2015 are as follows (in thousands, except per unit amounts):
 
 
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter (2)
Year Ended December 31, 2016
 
 
 
 
 
 
 
Total revenues
$
100,998

 
$
152,253

 
$
159,903

 
$
175,872

Total segment gross margin (1)
46,430

 
59,016

 
58,793

 
59,396

Operating loss
(16,097
)
 
(12,790
)
 
(9,724
)
 
(21,617
)
Net loss from continuing operations
(17,772
)
 
(12,156
)
 
(5,488
)
 
(8,413
)
Income (loss) from discontinued operations
7,169

 
2,675

 
(2,310
)
 
(12,249
)
Net income (loss) attributable to noncontrolling interest
(3
)
 
954

 
1,241

 
574

Net income (loss) attributable to the Partnership
(10,600
)
 
(10,435
)
 
(9,039
)
 
(21,236
)
General Partner's Interest in net income (loss)
(97
)
 
(107
)
 
(31
)
 
2

Limited Partners' Interest in net loss
$
(10,503
)
 
$
(10,328
)
 
$
(9,008
)
 
$
(21,238
)
 
 
 
 
 
 
 
 
Limited Partners' income (loss) per unit:
 
 
 
 
 
 
 
Loss from continuing operations
$
(0.49
)
 
$
(0.40
)
 
$
(0.29
)
 
$
(0.33
)
Income (loss) from discontinued operations
0.16

 
0.07

 
(0.05
)
 
$
(0.27
)
Net loss
$
(0.33
)
 
$
(0.33
)
 
$
(0.34
)
 
$
(0.60
)
 
 
 
 
 
 
 
 
Year Ended December 31, 2015
 
 
 
 
 
 
 
Total revenues
$
184,937

 
$
227,693

 
$
174,848

 
$
162,826

Total segment gross margin (1)
45,314

 
44,921

 
41,445

 
48,176

Operating loss
(8,785
)
 
(6,815
)
 
(11,114
)
 
(160,403
)
Net loss from continuing operations
(12,523
)
 
(11,977
)
 
(15,607
)
 
(159,311
)
Income (loss) from discontinued operations
10,596

 
1,575

 
(900
)
 
(11,694
)
Net income (loss) attributable to noncontrolling interest
4

 
22

 
24

 
(63
)
Net loss attributable to the Partnership
(1,932
)
 
(10,425
)
 
(16,532
)
 
(170,939
)
General Partner's Interest in net loss
(32
)
 
(66
)
 
(104
)
 
(1,621
)
Limited Partners' Interest in net loss
$
(1,900
)
 
$
(10,358
)
 
$
(16,428
)
 
$
(169,319
)
 
 
 
 
 
 
 
 
Limited Partners' income (loss) per unit:
 
 
 
 
 
 
 
Loss from continuing operations
$
(0.41
)
 
$
(0.41
)
 
$
(0.51
)
 
$
(3.58
)
Income (loss) from discontinued operations, net of tax
0.25

 
0.03

 
(0.02
)
 
(0.27
)
Net loss
$
(0.16
)
 
$
(0.38
)
 
$
(0.53
)
 
$
(3.85
)
 
(1)
For a definition of total segment gross margin and a reconciliation to its most directly comparable financial measure calculated and presented in accordance with GAAP and a discussion of how we use gross margin to evaluate our operating performance, please read Item 7. "Management's Discussion and Analysis, How We Evaluate Our Operations."
(2)
We recognized goodwill impairment charges of $2.7 million and $148.5 million in the fourth quarters of 2016 and 2015, respectively.
Organization and Basis of Presentation (Details) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Minimum
Dec. 31, 2016
Maximum
Dec. 31, 2016
8.50% Senior Notes, due 2021
Senior Notes
Dec. 28, 2016
8.50% Senior Notes, due 2021
Senior Notes
Dec. 31, 2016
3.77% Senior Notes, due 2031
Senior Notes
Sep. 30, 2016
3.77% Senior Notes, due 2031
Senior Notes
Mar. 1, 2017
Subsequent Event
mi
Sep. 1, 2017
Discontinued Operations, Disposed of by Sale [Member]
Propane Marketing Services
Subsequent Event
Sep. 1, 2017
Discontinued Operations, Disposed of by Sale [Member]
Propane Marketing Services
Subsequent Event
Sep. 1, 2017
Propane Business [Member]
Discontinued Operations, Disposed of by Sale [Member]
Propane Marketing Services
Subsequent Event
location
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
Percentage of business divested (percent)
 
 
 
 
 
 
 
 
 
 
 
100.00% 
 
General partners' capital account, percentage
77.00% 
 
 
 
 
 
 
 
 
 
 
 
 
Limited partners' capital account, percentage
23.00% 
 
 
 
 
 
 
 
 
 
 
 
 
Gathering pipeline (miles)
 
 
 
 
 
 
 
 
 
1,172 
 
 
 
Services
$ 151,231,000 
$ 135,718,000 
$ 116,195,000 
 
 
 
 
 
 
 
 
 
 
Depreciation, amortization and accretion expense
90,882,000 
81,335,000 
57,818,000 
 
 
 
 
 
 
 
 
 
 
Earnings in unconsolidated affiliates
(40,158,000)
(8,201,000)
(348,000)
 
 
 
 
 
 
 
 
 
 
Net loss
(48,544,000)
(199,841,000)
(79,567,000)
 
 
 
 
 
 
 
 
 
 
Intangible assets, net
205,071,000 
224,239,000 
 
 
 
 
 
 
 
 
 
 
 
Investment in unconsolidated affiliates
(291,987,000)
(63,704,000)
 
 
 
 
 
 
 
 
 
 
 
Noncontrolling interests
16,755,000 
12,111,000 
 
 
 
 
 
 
 
 
 
 
 
Additions to property, plant and equipment
147,796,000 
208,040,000 
153,876,000 
 
 
 
 
 
 
 
 
 
 
Investments in unconsolidated affiliates
(150,179,000)
(65,701,000)
(12,000,000)
 
 
 
 
 
 
 
 
 
 
Contributions from noncontrolling interest owners
3,366,000 
584,000 
0 
 
 
 
 
 
 
 
 
 
 
Number of business locations sold
 
 
 
 
 
 
 
 
 
 
 
 
40 
Cash received upon disposal
 
 
 
 
 
 
 
 
 
 
170,000,000 
 
 
Gain on sale of business
 
 
 
 
 
 
 
 
 
 
46,600,000 
 
 
Business exit costs
9,100,000 
 
 
 
 
 
 
 
 
 
2,500,000 
 
 
Bad debt expense
$ 1,038,000 
$ 1,212,000 
$ 820,000 
 
 
 
 
 
 
 
 
 
 
Useful Life (in years)
 
 
 
3 years 
40 years 
 
 
 
 
 
 
 
 
Useful life
 
 
 
5 years 0 months 0 days 
30 years 
 
 
 
 
 
 
 
 
Debt instrument, interest rate (percent)
 
 
 
 
 
8.50% 
8.50% 
3.77% 
3.77% 
 
 
 
 
Acquisitions and Divestitures JP Energy Partners Merger (Details) (USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Mar. 8, 2017
Subsequent Event
Affiliated Holders
Mar. 8, 2017
Subsequent Event
Public Unit Consideration
Mar. 8, 2017
JPE Energy Partners
Subsequent Event
business_segment
Dec. 31, 2016
General Partner
Dec. 31, 2015
General Partner
Dec. 31, 2014
General Partner
Mar. 8, 2017
General Partner
Subsequent Event
Mar. 8, 2017
Affiliated Entity
General Partner
Subsequent Event
Business Acquisition [Line Items]
 
 
 
 
 
 
 
 
 
 
Merger agreement, conversion ratio
 
 
0.5775 
0.5225 
 
 
 
 
 
 
General partners' interest units issued (in shares)
680,000 
536,000 
 
 
 
143,900 
143,517 
206,810 
20,200,000 
9,800,000 
Estimated fair value of common units issued
 
 
 
 
 
 
 
 
$ 322.2 
 
Number of businesses segments acquired
 
 
 
 
3 
 
 
 
 
 
Acquisitions and Divestitures Delta House Investment (Details) (USD $)
0 Months Ended 12 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 12 Months Ended
Oct. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Oct. 8, 2015
Sep. 18, 2015
Sep. 15, 2015
Aug. 15, 2014
Jan. 29, 2014
Sep. 18, 2015
Pinto Offshore Holdings LLC
Dec. 31, 2016
FPS
Dec. 31, 2015
FPS
Dec. 31, 2014
FPS
Sep. 18, 2015
FPS
Oct. 31, 2016
Delta House
Apr. 25, 2016
Delta House
Sep. 18, 2015
Delta House
Dec. 31, 2016
Delta House
Oct. 31, 2016
Delta House
Apr. 25, 2016
D-Day Offshore Holdings
Sep. 18, 2015
Pinto Offshore Holdings LLC
Delta House
Apr. 25, 2016
Arclight Affiliate
D-Day Offshore Holdings
Oct. 31, 2016
Series D
Dec. 31, 2016
Series D
Dec. 31, 2015
Series D
Dec. 31, 2014
Series D
Oct. 31, 2016
Series D
Dec. 31, 2016
General Partner
Dec. 31, 2015
General Partner
Dec. 31, 2014
General Partner
Dec. 31, 2016
Class A Units
Dec. 31, 2016
Class B Units
Business Acquisition [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Percentage ownership
 
 
 
 
 
 
 
 
 
26.30% 
20.10% 
 
 
49.00% 
 
 
 
20.10% 
 
100.00% 
12.90% 
1.00% 
 
 
 
 
 
 
 
 
 
 
Payments to acquire equity method investments
 
$ 150,179,000 
$ 65,701,000 
$ 12,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
$ 162,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Limited partners, units issued (in shares)
 
51,351,000 
50,504,000 
 
151,937 
7,500,000 
7,500,000 
4,622,352 
3,400,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Investments
 
270,742,000 
65,703,000 
12,000,000 
 
 
 
 
 
 
55,461,000 
40,559,000 
0 
 
48,800,000 
9,900,000 
 
65,700,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Partners capital account distributions, delta house
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(96,300,000)
 
 
 
 
Acquired interest (percent)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
6.20% 
 
 
 
 
 
 
 
 
 
 
 
 
 
Issuance of units
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
34,500,000 
0 
0 
40,000,000 
 
 
 
 
 
 
General partners' interest units issued (in shares)
 
680,000 
536,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2,333,333 
143,900 
143,517 
206,810 
 
 
Proceeds from lines of credit
$ 14,300,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity method investment, distribution percentage
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
100.00% 
7.00% 
Acquisitions and Divestitures Emerald Transactions (Details) (USD $)
0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 0 Months Ended
Apr. 27, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Apr. 27, 2016
platform
lateral
agreement
Apr. 25, 2016
lateral
platform
Apr. 25, 2016
Destin
mi
Dec. 31, 2016
Destin
Dec. 31, 2015
Destin
Dec. 31, 2014
Destin
Apr. 25, 2016
Destin
Apr. 25, 2016
Tri-States
mi
Dec. 31, 2016
Tri-States
Dec. 31, 2015
Tri-States
Dec. 31, 2014
Tri-States
Apr. 25, 2016
Tri-States
Apr. 25, 2016
Wilprise
mi
Dec. 31, 2016
Wilprise
Dec. 31, 2015
Wilprise
Dec. 31, 2014
Wilprise
Apr. 25, 2016
Wilprise
Apr. 27, 2016
Okeanos
mi
Dec. 31, 2016
Okeanos
Dec. 31, 2015
Okeanos
Dec. 31, 2014
Okeanos
Apr. 27, 2016
Okeanos
Apr. 27, 2016
BP
Apr. 25, 2016
BP
Apr. 25, 2016
Series C Preferred Stock
Apr. 27, 2016
BP
Apr. 27, 2016
Limited Partner
Business Acquisition [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Number of agreements
 
 
 
 
2 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Ownership % at December 31, 2016
 
 
 
 
 
 
 
49.70% 
 
 
49.70% 
 
16.70% 
 
 
16.70% 
 
25.30% 
 
 
25.30% 
 
66.70% 
 
 
66.70% 
 
 
 
 
 
Payments to acquire equity method investments
 
$ 150,179,000 
$ 65,701,000 
$ 12,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 27,400,000 
$ 183,600,000 
 
$ 100,900,000 
 
Length of pipeline
 
 
 
 
 
 
255 
 
 
 
 
161 
 
 
 
 
30 
 
 
 
 
100 
 
 
 
 
 
 
 
 
 
Volume of natural gas, operating amount
 
 
 
 
 
 
1,200 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Number of platforms
 
 
 
 
2 
4 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Number of laterals
 
 
 
 
1 
6 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Length of offshore pipeline
 
 
 
 
 
 
120 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Length of onshore pipeline
 
 
 
 
 
 
135 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Volume of natural gas, operating amount, production
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1,000 
 
 
 
 
 
 
 
 
 
Temporary equity, shares issued (in shares)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
8,571,429 
 
 
Number of securities called by warrants (in shares)
 
 
 
 
 
800,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exercise price of warrants (in dollars per share)
 
 
 
 
 
$ 7.25 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Issuance of Series C Units and Warrant in connection with the Emerald Transactions
 
120,000,000 
0 
0 
 
120,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Borrowings to acquire equity method investments
91,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Investments
 
270,742,000 
65,703,000 
12,000,000 
 
 
 
122,830,000 
0 
0 
 
 
56,681,000 
0 
0 
 
 
5,064,000 
0 
0 
 
 
27,451,000 
0 
0 
 
212,000,000 
 
 
 
 
Partners capital account contributions, emerald
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 1,000,000 
Acquisitions and Divestitures Gulf of Mexico Pipeline Narrative (Details) (USD $)
3 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Apr. 15, 2016
American Panther
mi
Dec. 31, 2016
American Panther
Apr. 15, 2016
American Panther
Business Acquisition [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Noncontrolling interest, ownership percentage by parent (percent)
 
 
 
 
 
 
 
 
 
 
 
 
 
60.00% 
Length of pipeline
 
 
 
 
 
 
 
 
 
 
 
200 
 
 
Cash
 
 
 
 
 
 
 
 
 
 
 
$ 2,700,000 
 
 
Pipelines
 
 
 
 
 
 
 
 
 
 
 
 
 
16,600,000 
Land
 
 
 
 
 
 
 
 
 
 
 
 
 
400,000 
ARO
 
 
 
 
 
 
 
 
 
 
 
14,300,000 
 
 
Noncontrolling interest
 
 
 
 
 
 
 
 
 
 
 
 
 
1,800,000 
Total revenue
175,872,000 
159,903,000 
152,253,000 
100,998,000 
162,826,000 
174,848,000 
227,693,000 
184,937,000 
589,026,000 
750,304,000 
838,949,000 
 
13,200,000 
 
Operating loss
(21,617,000)
(9,724,000)
(12,790,000)
(16,097,000)
(160,403,000)
(11,114,000)
(6,815,000)
(8,785,000)
(60,228,000)
(187,117,000)
(35,761,000)
 
7,400,000 
 
Transaction costs
 
 
 
 
 
 
 
 
 
 
 
 
$ 300,000 
 
Acquisitions and Divestitures Southern Propane Inc. (Details) (USD $)
12 Months Ended 0 Months Ended 0 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
May 8, 2015
Southern Propane Inc.
May 8, 2015
Southern Propane Inc.
May 8, 2015
Customer relationships
Southern Propane Inc.
May 8, 2015
Customer relationships
Southern Propane Inc.
May 8, 2015
Other
Southern Propane Inc.
Business Acquisition [Line Items]
 
 
 
 
 
 
 
 
Consideration transferred
 
 
 
$ 16,300,000 
 
 
 
 
Cash
 
 
 
12,500,000 
 
 
 
 
Payment for final working capital adjustment
 
 
 
100,000 
 
 
 
 
Common units issued (shares)
 
 
 
266,951 
 
 
 
 
Acquisitions partially funded by the issuance of common units
0 
3,442,000 
414,396,000 
3,400,000 
 
 
 
 
Remaining contingent liability released in 2016
 
 
 
 
200,000 
 
 
 
Intangible assets acquired
 
 
 
 
 
 
6,200,000 
300,000 
Goodwill
202,135,000 
204,789,000 
360,659,000 
 
5,800,000 
 
 
 
Property, plant and equipment acquired
 
 
 
 
3,000,000 
 
 
 
Accounts receivable acquired
 
 
 
 
$ 1,000,000 
 
 
 
Weighted average useful life
 
 
 
 
 
12 years 
 
 
Acquisitions and Divestitures Costar Acquisition Narrative (Details) (USD $)
3 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 1 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Oct. 14, 2014
Costar Midstream, L.L.C.
Dec. 31, 2015
Costar Midstream, L.L.C.
Oct. 14, 2014
Costar Midstream, L.L.C.
Feb. 29, 2016
Interest rate swap
Business Acquisition [Line Items]
 
 
 
 
 
 
 
 
 
Acquired interest (percent)
 
 
 
 
 
 
 
100.00% 
 
Consideration transferred
 
 
 
 
 
$ 405,300,000 
 
 
 
Acquisition working capital adjustment
 
 
 
7,400,000 
 
 
 
 
6,800,000 
Escrowed units returned to partnership (in shares)
 
 
 
 
 
 
 
 
1,034,483 
Payments for previous acquisition
 
 
 
 
 
 
 
 
300,000 
Loss on impairment of goodwill
$ 2,700,000 
$ 148,500,000 
$ 2,654,000 
$ 148,488,000 
$ 0 
 
$ 95,000,000 
 
 
Acquisitions and Divestitures Lavaca Acquisition Narrative (Details) (USD $)
3 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Jan. 31, 2014
Lavaca
mi
Dec. 31, 2015
Crude Oil Supply and Logistics Business
Dec. 31, 2015
Crude Oil Supply and Logistics Business
Lavaca
Business Acquisition [Line Items]
 
 
 
 
 
 
 
 
Length of pipeline
 
 
 
 
 
120 
 
 
Cash
 
 
 
 
 
$ 104,400,000 
 
 
Loss on impairment of goodwill
$ 2,700,000 
$ 148,500,000 
$ 2,654,000 
$ 148,488,000 
$ 0 
 
$ 118,600,000 
$ 23,600,000 
Acquisitions and Divestitures JP Development (Details) (Common Control Acquisition, USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended
Feb. 12, 2014
Feb. 12, 2014
Common Control Acquisition
 
 
Business Acquisition [Line Items]
 
 
Consideration transferred
$ 319.1 
 
Common units issued (shares)
5,841,205 
 
Cash
52.0 
 
Related amounts receivable forgiven by ArcLight
 
$ 4.3 
Discontinued Operations - Narrative (Details) (USD $)
12 Months Ended 0 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Propane Marketing Services
Discontinued Operations, Disposed of by Sale [Member]
Dec. 31, 2015
Propane Marketing Services
Discontinued Operations, Disposed of by Sale [Member]
Dec. 31, 2014
Propane Marketing Services
Discontinued Operations, Disposed of by Sale [Member]
Feb. 12, 2016
Mid-Continental
Dec. 31, 2016
Mid-Continental
Dec. 31, 2015
Mid-Continental
Dec. 31, 2014
Mid-Continental
Jun. 30, 2014
Bakken Business
Dec. 31, 2014
Bakken Business
Dec. 31, 2014
Blackwater
Sep. 1, 2017
Subsequent Event
Propane Marketing Services
Sep. 1, 2017
Subsequent Event
Propane Marketing Services
Discontinued Operations, Disposed of by Sale [Member]
Sep. 1, 2017
Subsequent Event
Propane Marketing Services
Discontinued Operations, Disposed of by Sale [Member]
Sep. 1, 2017
Subsequent Event
Propane Business [Member]
Propane Marketing Services
Discontinued Operations, Disposed of by Sale [Member]
location
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Loss on impairment of noncurrent assets held for sale
$ 0 
$ 0 
$ 673,000 
 
 
 
 
 
 
 
 
 
$ 700,000 
 
 
 
 
Purchase price of disposal group
 
 
 
 
 
 
 
 
 
 
9,100,000 
 
 
 
 
 
 
Cash proceeds from divestiture of business
 
 
 
 
 
 
9,700,000 
 
 
 
 
 
 
170,000,000 
 
 
 
Percentage of business divested (percent)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
100.00% 
 
Number of business locations sold
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
40 
Cash received upon disposal
 
 
 
 
 
 
 
 
 
 
 
 
 
 
170,000,000 
 
 
Gain on sale of business
 
 
 
 
 
 
 
 
 
 
 
 
 
 
46,600,000 
 
 
Business exit costs
9,100,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
2,500,000 
 
 
Loss on sale of assets
 
 
 
2,182,000 
1,060,000 
993,000 
 
 
(12,900,000)
 
(7,300,000)
7,288,000 
 
 
 
 
 
Impairment of goodwill
 
 
 
$ 12,802,000 
$ 0 
$ 0 
 
$ 0 
$ 12,909,000 
$ 0 
$ 2,000,000 
 
 
 
 
 
 
Discontinued Operations - Income Statement (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Mid-Continental
Dec. 31, 2015
Mid-Continental
Dec. 31, 2014
Mid-Continental
Jun. 30, 2014
Bakken Business
Dec. 31, 2014
Bakken Business
Dec. 31, 2015
Blackwater
Dec. 31, 2014
Blackwater
Dec. 31, 2016
Discontinued Operations, Disposed of by Sale [Member]
Propane Marketing Services
Dec. 31, 2015
Discontinued Operations, Disposed of by Sale [Member]
Propane Marketing Services
Dec. 31, 2014
Discontinued Operations, Disposed of by Sale [Member]
Propane Marketing Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total revenues
 
 
 
 
 
 
 
 
 
 
 
$ 11,495 
$ 429,784 
$ 967,480 
 
$ 7,865 
$ 74 
$ 474 
$ 137,896 
$ 163,583 
$ 181,843 
Costs of sales
 
 
 
 
 
 
 
 
 
 
 
11,687 
426,886 
961,428 
 
 
 
 
49,672 
62,621 
116,924 
Direct operating expenses
 
 
 
 
 
 
 
 
 
 
 
203 
2,269 
2,866 
 
 
 
 
51,828 
55,751 
51,495 
Corporate expenses
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
9,992 
12,508 
12,279 
Depreciation, amortization and accretion
 
 
 
 
 
 
 
 
 
 
 
211 
2,281 
2,258 
 
 
 
 
15,936 
17,261 
14,709 
(Gain) loss on sale of assets, net
 
 
 
 
 
 
 
 
 
 
 
(114)
119 
229 
 
 
 
 
2,182 
1,060 
993 
Loss on impairment of goodwill and assets held for sale
 
 
 
 
 
 
 
 
 
 
 
0 
(12,909)
0 
(2,000)
 
 
 
(12,802)
0 
0 
Total expenses
 
 
 
 
 
 
 
 
 
 
 
11,987 
444,464 
966,781 
 
 
 
 
142,412 
149,201 
196,400 
Operating (loss) income
 
 
 
 
 
 
 
 
 
 
 
(492)
(14,680)
699 
 
 
 
 
(4,516)
14,382 
(14,557)
Interest expense
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(36)
(43)
(61)
Other income (expense)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
374 
272 
434 
Other income (expense)
 
 
 
 
 
 
 
 
 
 
 
(47)
(271)
(366)
 
 
 
 
 
 
 
(Loss) income from discontinued operations before income tax expense
(12,249)
(2,310)
2,675 
7,169 
(11,694)
(900)
1,575 
10,596 
(4,715)
(423)
(24,071)
(539)
(14,951)
333 
 
(9,608)
(80)
(611)
(4,178)
14,611 
(14,184)
Income tax expense
 
 
 
 
 
 
 
 
 
 
 
0 
0 
0 
 
 
 
 
2 
(3)
(1)
Net (loss) income from discontinued operations
 
 
 
 
 
 
 
 
 
 
 
$ (539)
$ (14,951)
$ 333 
 
 
 
 
$ (4,176)
$ 14,608 
$ (14,185)
Discontinued Operations - Balance Sheet (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
 
 
Total current assets of discontinued operations
$ 22,727 
$ 25,369 
Total non-current assets of discontinued operations
114,032 
148,067 
Total current liabilities of discontinued operations
14,319 
12,781 
Total non-current liabilities of discontinued operations
172 
375 
Propane Marketing Services |
Discontinued Operations, Disposed of by Sale [Member]
 
 
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
 
 
Accounts receivable, net
13,055 
14,736 
Unbilled revenue
2,736 
3,506 
Inventory
4,785 
3,946 
Other current assets
2,151 
451 
Total current assets of discontinued operations
22,727 
22,639 
Property, plant and equipment, net
78,395 
90,194 
Goodwill
15,361 
28,162 
Intangible assets, net
20,212 
23,041 
Risk management assets
37 
0 
Other assets, net
27 
26 
Total non-current assets of discontinued operations
114,032 
141,423 
Accounts payable
5,709 
3,148 
Accrued expenses and other current liabilities
8,563 
8,852 
Current portion of long-term debt
47 
141 
Total current liabilities of discontinued operations
14,319 
12,141 
Other liabilities
172 
375 
Total non-current liabilities of discontinued operations
$ 172 
$ 375 
Discontinued Operations - Selected Financial Information (Details) (Propane Marketing Services, Discontinued Operations, Disposed of by Sale [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Propane Marketing Services |
Discontinued Operations, Disposed of by Sale [Member]
 
 
 
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
 
 
 
Depreciation
$ 13,108 
$ 14,455 
$ 12,298 
Amortization
2,828 
2,806 
2,411 
Capital expenditures
6,549 
17,503 
16,398 
Impairment of goodwill
12,802 
0 
0 
Loss on sale of assets
2,182 
1,060 
993 
Unrealized (gain) loss on derivative contracts, net
$ (1,072)
$ (11,764)
$ 12,691 
Concentration of Credit Risk (Details) (Sales Revenue, Net, Customer Concentration Risk)
12 Months Ended
Dec. 31, 2016
Customer A
Dec. 31, 2016
Customer B
Dec. 31, 2015
Customer C
Dec. 31, 2014
Customer D
Dec. 31, 2014
Customer E [Member]
Revenue, Major Customer
 
 
 
 
 
Entity-wide revenue by major customer, percentage
21.00% 
13.00% 
34.00% 
20.00% 
11.00% 
Inventory (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]
 
 
Crude oil
$ 1,216 
$ 486 
NGLs
288 
274 
Refined products
0 
232 
Materials, supplies and equipment
486 
303 
Total inventory
$ 1,990 
$ 1,295 
Detail of Certain Asset Accounts (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2015
Other current assets
 
 
Prepaid insurance
$ 9,702 
$ 5,187 
Insurance receivables
1,624 
84 
Other receivables
2,997 
2,680 
Due from related parties
4,833 
8,749 
Risk management assets
469 
365 
Other assets
5,891 
5,281 
Total Other current assets
$ 25,516 
$ 22,346 
Risk Management Activities (Commodity Derivatives) (Details) (Crude Oil, Commodity Contract)
12 Months Ended
Dec. 31, 2016
bbl
Dec. 31, 2015
bbl
Derivative [Line Items]
 
 
Derivative notional volume
180,000,000 
0 
Fixed Price
 
 
Derivative [Line Items]
 
 
Derivative notional volume
0 
(93,000,000)
Risk Management Activities (Interest Rate Swap) (Details) (Interest rate swap, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Derivative [Line Items]
 
Fair Value, Asset
$ 10,376 
January 3, 2017 thru September 3, 2019
 
Derivative [Line Items]
 
Notional Amount
200,000 
Fair Value, Asset
1,912 
January 1, 2017 thru December 31, 2017
 
Derivative [Line Items]
 
Notional Amount
100,000 
Fair Value, Liability
(71)
January 1, 2018 thru January 31, 2019
 
Derivative [Line Items]
 
Notional Amount
100,000 
Fair Value, Asset
226 
January 1, 2018 thru December 31, 2021
 
Derivative [Line Items]
 
Notional Amount
100,000 
Fair Value, Asset
3,090 
January 1, 2018 thru December 31, 2022
 
Derivative [Line Items]
 
Notional Amount
150,000 
Fair Value, Asset
$ 5,219 
Risk Management Activities (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Derivative [Line Items]
 
 
 
Amortization of weather derivative premium
$ 966,000 
$ 912,000 
$ 1,035,000 
Weather Contract
 
 
 
Derivative [Line Items]
 
 
 
Derivative instruments not designated as hedging instruments, potential cash proceeds from Contract
30,000,000 
 
 
Payments of derivative issuance costs
1,000,000 
900,000 
 
Term of Contract
1 year 0 months 0 days 
 
 
Amortization of weather derivative premium
$ 400,000 
$ 400,000 
 
Risk Management Activities (Fair Value of Commodity Derivatives) (Details) (Commodity derivative instruments, net, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2015
Derivative [Line Items]
 
 
Derivative asset, gross derivative asset
$ 11,169 
$ 457 
Derivative asset, gross derivative liabilities
(73)
(92)
Derivative asset, fair value, net
11,096 
365 
Derivative liability, gross derivative assets
(254)
(92)
Derivative liability, gross derivative liabilities
73 
92 
Derivative liability, fair value, net
(181)
0 
Other current assets
 
 
Derivative [Line Items]
 
 
Derivative asset, gross derivative asset
541 
457 
Derivative asset, gross derivative liabilities
(72)
(92)
Derivative asset, fair value, net
469 
365 
Risk management assets - long term
 
 
Derivative [Line Items]
 
 
Derivative asset, gross derivative asset
10,628 
0 
Derivative asset, gross derivative liabilities
(1)
0 
Derivative asset, fair value, net
10,627 
0 
Accrued expenses and other current liabilities
 
 
Derivative [Line Items]
 
 
Derivative liability, gross derivative assets
(253)
(92)
Derivative liability, gross derivative liabilities
72 
92 
Derivative liability, fair value, net
(181)
0 
Other liabilities
 
 
Derivative [Line Items]
 
 
Derivative liability, gross derivative assets
(1)
0 
Derivative liability, gross derivative liabilities
1 
0 
Derivative liability, fair value, net
$ 0 
$ 0 
Risk Management Activities (Realized and Unrealized Gains (Losses)) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Derivatives, Fair Value [Line Items]
 
 
 
Loss on commodity derivatives, net
$ (1,617)
$ 1,345 
$ 1,091 
Commodity derivative instruments, net
 
 
 
Derivatives, Fair Value [Line Items]
 
 
 
Loss on commodity derivatives, net
(2,679)
294 
(1,008)
Gain (loss) on derivatives, unrealized
10,327 
86 
641 
Commodity derivative instruments, net |
Losses on commodity derivatives, net
 
 
 
Derivatives, Fair Value [Line Items]
 
 
 
Loss on commodity derivatives, net
(1,569)
1,632 
734 
Gain (loss) on derivatives, unrealized
(48)
(287)
357 
Commodity derivative instruments, net |
Interest expense
 
 
 
Derivatives, Fair Value [Line Items]
 
 
 
Loss on commodity derivatives, net
(144)
(425)
(707)
Gain (loss) on derivatives, unrealized
10,375 
373 
284 
Commodity derivative instruments, net |
Direct operating expenses
 
 
 
Derivatives, Fair Value [Line Items]
 
 
 
Loss on commodity derivatives, net
(966)
(913)
(1,035)
Gain (loss) on derivatives, unrealized
$ 0 
$ 0 
$ 0 
Fair Value Measurement (Details Textual) (3.77% Senior Notes, due 2031, Senior Notes)
Dec. 31, 2016
Sep. 30, 2016
3.77% Senior Notes, due 2031 |
Senior Notes
 
 
Debt Instrument [Line Items]
 
 
Debt instrument, interest rate (percent)
3.77% 
3.77% 
Property, Plant and Equipment, Net (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Land
Dec. 31, 2015
Land
Dec. 31, 2016
Construction in progress
Dec. 31, 2015
Construction in progress
Dec. 31, 2016
Transportation Equipment
Dec. 31, 2015
Transportation Equipment
Dec. 31, 2016
Buildings and improvements
Dec. 31, 2015
Buildings and improvements
Dec. 31, 2016
Processing and treating plants
Dec. 31, 2015
Processing and treating plants
Dec. 31, 2016
Pipelines and compressors
Dec. 31, 2015
Pipelines and compressors
Dec. 31, 2016
Storage
Dec. 31, 2015
Storage
Dec. 31, 2016
Equipment
Dec. 31, 2015
Equipment
Dec. 31, 2016
Minimum
Dec. 31, 2016
Minimum
Transportation Equipment
Dec. 31, 2016
Minimum
Buildings and improvements
Dec. 31, 2016
Minimum
Processing and treating plants
Dec. 31, 2016
Minimum
Pipelines and compressors
Dec. 31, 2016
Minimum
Storage
Dec. 31, 2016
Minimum
Equipment
Dec. 31, 2016
Maximum
Dec. 31, 2016
Maximum
Transportation Equipment
Dec. 31, 2016
Maximum
Buildings and improvements
Dec. 31, 2016
Maximum
Processing and treating plants
Dec. 31, 2016
Maximum
Pipelines and compressors
Dec. 31, 2016
Maximum
Storage
Dec. 31, 2016
Maximum
Equipment
Dec. 31, 2016
Ala Tenn System
Dec. 31, 2015
Ala Tenn System
Property, Plant and Equipment, Net [Abstract]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Useful Life (in years)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3 years 
5 years 
4 years 
8 years 
3 years 
3 years 
5 years 
40 years 
15 years 
40 years 
40 years 
40 years 
40 years 
20 years 
 
 
Property plant and equipment gross
$ 1,331,330 
$ 1,179,972 
$ 18,861 
$ 14,118 
$ 128,519 
$ 56,134 
$ 20,010 
$ 22,125 
$ 13,762 
$ 12,121 
$ 120,977 
$ 102,111 
$ 804,815 
$ 775,486 
$ 146,408 
$ 144,780 
$ 77,978 
$ 53,097 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 291,100 
$ 228,900 
Less accumulated depreciation
(264,722)
(198,651)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Property, plant and equipment, net
$ 1,066,608 
$ 981,321 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Property, Plant and Equipment, Net (Asset Impairments and Insurance Proceeds) (Details) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]
 
 
 
 
Property plant and equipment gross
 
$ 1,331,330,000 
$ 1,179,972,000 
 
Depreciation
 
69,700,000 
60,600,000 
38,600,000 
Interest costs capitalized
 
2,700,000 
1,900,000 
800,000 
Loss on impairment of property, plant and equipment
21,300,000 
697,000 
0 
21,344,000 
Discount rate
9.50% 
 
 
 
Ala Tenn System
 
 
 
 
Property, Plant and Equipment [Line Items]
 
 
 
 
Property plant and equipment gross
 
291,100,000 
228,900,000 
 
Adjustment
 
 
 
 
Property, Plant and Equipment [Line Items]
 
 
 
 
Depreciation
 
$ 13,200,000 
$ 15,500,000 
$ 14,000,000 
Goodwill and Intangible Assets, Net (Details) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Goodwill [Line Items]
 
 
 
 
 
Loss on impairment of goodwill
$ 2,700,000 
$ 148,500,000 
$ 2,654,000 
$ 148,488,000 
$ 0 
Amortization of intangible assets
 
 
19,200,000 
20,000,000 
18,400,000 
Thereafter
116,500,000 
 
116,500,000 
 
 
Net unamortized intangible asset
205,071,000 
224,239,000 
205,071,000 
224,239,000 
 
Minimum
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Useful life
 
 
5 years 0 months 0 days 
 
 
2017
10,000,000 
 
10,000,000 
 
 
2018
10,000,000 
 
10,000,000 
 
 
2019
10,000,000 
 
10,000,000 
 
 
2020
10,000,000 
 
10,000,000 
 
 
2021
10,000,000 
 
10,000,000 
 
 
Maximum
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Useful life
 
 
30 years 
 
 
2017
15,600,000 
 
15,600,000 
 
 
2018
15,600,000 
 
15,600,000 
 
 
2019
15,600,000 
 
15,600,000 
 
 
2020
15,600,000 
 
15,600,000 
 
 
2021
15,600,000 
 
15,600,000 
 
 
Costar Midstream, L.L.C.
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Loss on impairment of goodwill
 
95,000,000 
 
 
 
Adjustment
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Amortization of intangible assets
 
 
2,900,000 
4,000,000 
4,400,000 
Customer relationships
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Impairment of intangible assets
 
 
 
700,000 
 
Net unamortized intangible asset
83,172,000 
90,882,000 
83,172,000 
90,882,000 
 
Customer contracts
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Impairment of intangible assets
 
 
 
 
8,100,000 
Net unamortized intangible asset
61,464,000 
70,304,000 
61,464,000 
70,304,000 
 
Storage Tank Leasing Arrangement
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Optional renewal term of long-term contract
 
 
2 years 
 
 
Storage Tank Leasing Arrangement |
Customer relationships
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Net unamortized intangible asset
10,000,000 
 
10,000,000 
 
 
Liquid Pipelines and Services
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Loss on impairment of goodwill
 
 
2,654,000 
29,896,000 
 
Crude Oil Supply and Logistics Business
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Loss on impairment of goodwill
 
118,600,000 
 
 
 
Crude Oil Supply and Logistics Business |
Costar Midstream, L.L.C.
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Loss on impairment of goodwill
 
95,000,000 
 
 
 
Crude Oil Supply and Logistics Business |
Lavaca
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Loss on impairment of goodwill
 
23,600,000 
 
 
 
Crude Oil Supply and Logistics Business |
Liquid Pipelines and Services
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Loss on impairment of goodwill
 
29,900,000 
 
 
 
JP Liquids Business |
Propane Marketing Services
 
 
 
 
 
Goodwill [Line Items]
 
 
 
 
 
Loss on impairment of goodwill
 
 
$ 2,700,000 
 
 
Goodwill and Intangible Assets, Net Schedule of Goodwill Activity (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Goodwill [Roll Forward]
 
 
 
 
 
Goodwill beginning balance
 
 
$ 204,789 
$ 360,659 
 
Goodwill acquired during the year
 
 
 
0 
 
Return of purchase price
 
 
 
(7,382)
 
Impairment charges
(2,700)
(148,500)
(2,654)
(148,488)
0 
Goodwill ending balance
202,135 
204,789 
202,135 
204,789 
360,659 
Gas Gathering and Processing Equipment [Member]
 
 
 
 
 
Goodwill [Roll Forward]
 
 
 
 
 
Goodwill beginning balance
 
 
0 
125,974 
 
Goodwill acquired during the year
 
 
 
0 
 
Return of purchase price
 
 
 
(7,382)
 
Impairment charges
 
 
0 
(118,592)
 
Goodwill ending balance
0 
0 
0 
0 
 
Liquid Pipelines and Services
 
 
 
 
 
Goodwill [Roll Forward]
 
 
 
 
 
Goodwill beginning balance
 
 
116,323 
146,219 
 
Goodwill acquired during the year
 
 
 
0 
 
Return of purchase price
 
 
 
0 
 
Impairment charges
 
 
(2,654)
(29,896)
 
Goodwill ending balance
113,669 
116,323 
113,669 
116,323 
 
Terminalling Services
 
 
 
 
 
Goodwill [Roll Forward]
 
 
 
 
 
Goodwill beginning balance
 
 
88,466 
88,466 
 
Goodwill acquired during the year
 
 
 
0 
 
Return of purchase price
 
 
 
0 
 
Impairment charges
 
 
0 
0 
 
Goodwill ending balance
$ 88,466 
$ 88,466 
$ 88,466 
$ 88,466 
 
Goodwill and Intangible Assets, Net Schedule of intangible assets (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
 
 
Gross carrying amount
$ 267,604 
$ 267,604 
Accumulated amortization
(62,533)
(43,365)
Net carrying amount
205,071 
224,239 
Customer relationships
 
 
Finite-Lived Intangible Assets [Line Items]
 
 
Gross carrying amount
106,417 
106,417 
Accumulated amortization
(23,245)
(15,535)
Net carrying amount
83,172 
90,882 
Customer contracts
 
 
Finite-Lived Intangible Assets [Line Items]
 
 
Gross carrying amount
94,692 
94,692 
Accumulated amortization
(33,228)
(24,388)
Net carrying amount
61,464 
70,304 
Dedicated acreage
 
 
Finite-Lived Intangible Assets [Line Items]
 
 
Gross carrying amount
53,350 
53,350 
Accumulated amortization
(4,439)
(2,661)
Net carrying amount
48,911 
50,689 
Collaborative arrangements
 
 
Finite-Lived Intangible Assets [Line Items]
 
 
Gross carrying amount
11,884 
11,884 
Accumulated amortization
(601)
0 
Net carrying amount
11,283 
11,884 
Noncompete agreements
 
 
Finite-Lived Intangible Assets [Line Items]
 
 
Gross carrying amount
1,063 
1,063 
Accumulated amortization
(1,000)
(765)
Net carrying amount
63 
298 
Other
 
 
Finite-Lived Intangible Assets [Line Items]
 
 
Gross carrying amount
198 
198 
Accumulated amortization
(20)
(16)
Net carrying amount
$ 178 
$ 182 
Investment in Unconsolidated Affiliates - Activity in Partnership's Investments in Unconsolidated Affiliates (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
FPS
Dec. 31, 2015
FPS
Dec. 31, 2014
FPS
Sep. 18, 2015
FPS
Dec. 31, 2016
OGL
Dec. 31, 2015
OGL
Dec. 31, 2014
OGL
Dec. 31, 2016
Destin
Dec. 31, 2016
Destin
Dec. 31, 2015
Destin
Dec. 31, 2014
Destin
Apr. 25, 2016
Destin
Dec. 31, 2016
Tri-States
Dec. 31, 2016
Tri-States
Dec. 31, 2015
Tri-States
Dec. 31, 2014
Tri-States
Apr. 25, 2016
Tri-States
Dec. 31, 2016
Okeanos
Dec. 31, 2016
Okeanos
Dec. 31, 2015
Okeanos
Dec. 31, 2014
Okeanos
Apr. 27, 2016
Okeanos
Dec. 31, 2016
Wilprise
Dec. 31, 2016
Wilprise
Dec. 31, 2015
Wilprise
Dec. 31, 2014
Wilprise
Apr. 25, 2016
Wilprise
Dec. 31, 2016
MPOG
Dec. 31, 2015
MPOG
Dec. 31, 2014
MPOG
Schedule of Equity Method Investments [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Ownership % at December 31, 2016
 
 
 
20.10% 
 
 
49.00% 
20.10% 
 
 
49.70% 
49.70% 
 
 
49.70% 
16.70% 
16.70% 
 
 
16.70% 
66.70% 
66.70% 
 
 
66.70% 
25.30% 
25.30% 
 
 
25.30% 
66.70% 
 
 
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity method investments
$ 63,704 
$ 10,368 
$ 0 
$ 33,465 
$ 0 
$ 0 
 
$ 23,060 
$ 0 
$ 0 
 
$ 0 
$ 0 
$ 0 
 
 
$ 0 
$ 0 
$ 0 
 
 
$ 0 
$ 0 
$ 0 
 
 
$ 0 
$ 0 
$ 0 
 
$ 7,179 
$ 10,368 
$ 0 
Investments
270,742 
65,703 
12,000 
55,461 
40,559 
0 
 
3,255 
25,144 
0 
 
122,830 
0 
0 
 
 
56,681 
0 
0 
 
 
27,451 
0 
0 
 
 
5,064 
0 
0 
 
0 
0 
12,000 
Earnings in unconsolidated affiliates
40,158 
8,201 
348 
21,022 
5,457 
0 
 
9,260 
2,013 
0 
3,946 
3,946 
0 
0 
 
1,633 
1,633 
0 
0 
 
3,642 
3,642 
0 
0 
 
437 
437 
0 
0 
 
218 
731 
348 
Contributions
429 
0 
0 
0 
0 
0 
 
0 
0 
0 
 
0 
0 
0 
 
 
0 
0 
0 
 
 
0 
0 
0 
 
 
0 
0 
0 
 
429 
0 
0 
Distributions
(83,046)
(20,568)
(1,980)
(45,465)
(12,551)
0 
 
(10,125)
(4,097)
0 
 
(15,894)
0 
0 
 
 
(3,292)
0 
0 
 
 
(4,034)
0 
0 
 
 
(557)
0 
0 
 
(3,679)
(3,920)
(1,980)
Equity method investments
$ 291,987 
$ 63,704 
$ 10,368 
$ 64,483 
$ 33,465 
$ 0 
 
$ 25,450 
$ 23,060 
$ 0 
$ 110,882 
$ 110,882 
$ 0 
$ 0 
 
$ 55,022 
$ 55,022 
$ 0 
$ 0 
 
$ 27,059 
$ 27,059 
$ 0 
$ 0 
 
$ 4,944 
$ 4,944 
$ 0 
$ 0 
 
$ 4,147 
$ 7,179 
$ 10,368 
- Financial Information for the Partnership's Equity Investments (Balance Sheets) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
 
 
Current assets
$ 120,167 
$ 182,264 
Non-current assets
1,369,492 
1,418,299 
Current liabilities
133,085 
146,490 
Non-current liabilities
$ 541,312 
$ 419,215 
Investment in Unconsolidated Affiliates - Financial Information for the Partnership's Equity Investments (Statement of Operations) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
 
 
 
Revenues
$ 370,263 
$ 235,041 
$ 102,290 
Operating expenses
99,084 
90,453 
72,775 
Net income
$ 261,200 
$ 135,083 
$ 28,173 
Investment in Unconsolidated Affiliates - Emerald transactions (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Destin
Dec. 31, 2016
Destin
Dec. 31, 2015
Destin
Dec. 31, 2014
Destin
Apr. 25, 2016
Destin
Dec. 31, 2016
Tri-States
Dec. 31, 2016
Tri-States
Dec. 31, 2015
Tri-States
Dec. 31, 2014
Tri-States
Apr. 25, 2016
Tri-States
Dec. 31, 2016
Okeanos
Dec. 31, 2016
Okeanos
Dec. 31, 2015
Okeanos
Dec. 31, 2014
Okeanos
Apr. 27, 2016
Okeanos
Dec. 31, 2016
Wilprise
Dec. 31, 2016
Wilprise
Dec. 31, 2015
Wilprise
Dec. 31, 2014
Wilprise
Apr. 25, 2016
Wilprise
Schedule of Equity Method Investments [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Revenues
$ 370,263 
$ 235,041 
$ 102,290 
$ 34,360 
 
 
 
 
$ 25,557 
 
 
 
 
$ 10,453 
 
 
 
 
$ 3,306 
 
 
 
 
Net income
261,200 
135,083 
28,173 
8,272 
 
 
 
 
15,983 
 
 
 
 
1,911 
 
 
 
 
2,028 
 
 
 
 
Ownership % at December 31, 2016
 
 
 
49.70% 
49.70% 
 
 
49.70% 
16.70% 
16.70% 
 
 
16.70% 
66.70% 
66.70% 
 
 
66.70% 
25.30% 
25.30% 
 
 
25.30% 
Partnership share of investee net income
 
 
 
4,109 
 
 
 
 
2,664 
 
 
 
 
1,274 
 
 
 
 
513 
 
 
 
 
Basis difference amortization
 
 
 
(163)
(163)
 
 
 
(1,031)
(1,031)
 
 
 
2,368 
2,368 
 
 
 
(76)
(76)
 
 
 
Earnings in unconsolidated affiliates
$ 40,158 
$ 8,201 
$ 348 
$ 3,946 
$ 3,946 
$ 0 
$ 0 
 
$ 1,633 
$ 1,633 
$ 0 
$ 0 
 
$ 3,642 
$ 3,642 
$ 0 
$ 0 
 
$ 437 
$ 437 
$ 0 
$ 0 
 
Accrued Expenses and Other Current Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2015
Payables and Accruals [Abstract]
 
 
Capital expenditures
$ 14,274 
$ 7,139 
Employee compensation
8,438 
6,198 
Convertible preferred unit distributions
7,103 
0 
Current portion of asset retirement obligation
6,499 
6,822 
Accrued interest
5,743 
1,838 
Additional Blackwater acquisition consideration
5,000 
0 
Due to related parties
4,072 
3,894 
Royalties payable
3,926 
4,163 
Transaction costs
3,000 
0 
Customer deposits
148 
1 
Deferred financing costs
2,743 
0 
Taxes payable
1,186 
1,146 
Recoverable gas costs
0 
0 
Gas imbalances payable
1,098 
413 
Other
9,491 
5,646 
Accrued expenses and other current liabilities
$ 72,721 
$ 37,260 
Asset Retirement Obligations (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
 
 
Balance at beginning of period
$ 35,371 
$ 34,645 
Liabilities assumed
14,542 
0 
Revision in estimate
230 
0 
Expenditures
(858)
(91)
Accretion expense
1,577 
817 
Balance at end of period
50,862 
35,371 
Less: current portion
6,499 
6,822 
Noncurrent asset retirement obligation
44,363 
28,549 
Restricted cash - long term
323,564 
5,037 
Assets Retirement Obligation
 
 
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
 
 
Restricted cash - long term
5,000 
 
American Panther
 
 
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
 
 
Liabilities assumed
$ 14,300 
 
Debt Obligations (Outstanding Borrowings) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Senior Notes
8.50% Senior Notes, due 2021
Dec. 28, 2016
Senior Notes
8.50% Senior Notes, due 2021
Dec. 31, 2016
Senior Notes
3.77% Senior Notes, due 2031
Sep. 30, 2016
Senior Notes
3.77% Senior Notes, due 2031
Dec. 31, 2016
Other Debt
Dec. 31, 2015
Other Debt
Dec. 31, 2016
Revolving Credit Facility
AMID Revolving Credit Agreement
Dec. 31, 2015
Revolving Credit Facility
AMID Revolving Credit Agreement
Dec. 31, 2016
Revolving Credit Facility
JPE Revolving Credit Agreement
Dec. 31, 2015
Revolving Credit Facility
JPE Revolving Credit Agreement
Debt Instrument [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
Balance
$ 1,252,012 
$ 690,598 
$ 300,000 
 
$ 60,000 
 
$ 3,762 
$ 3,498 
$ 711,250 
$ 525,100 
$ 177,000 
$ 162,000 
Less unamortized deferred financing costs and discount
(11,036)
 
(8,691)
 
(2,345)
 
0 
 
0 
 
0 
 
Subtotal
1,240,976 
 
291,309 
 
57,655 
 
3,762 
 
711,250 
 
177,000 
 
Less current portion
(5,438)
(2,758)
0 
 
(1,676)
 
(3,762)
(2,758)
0 
0 
0 
0 
Non-current portion
$ 1,235,538 
$ 687,840 
$ 291,309 
 
$ 55,979 
 
$ 0 
$ 740 
$ 711,250 
$ 525,100 
$ 177,000 
$ 162,000 
Debt instrument, interest rate (percent)
 
 
8.50% 
8.50% 
3.77% 
3.77% 
 
 
 
 
 
 
Partners' Capital (Units Outstanding) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Apr. 15, 2013
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
 
Partners' capital account, beginning balance
$ 169,712 
 
 
 
Paid in kind unit distributions
138,685 
118,762 
137,775 
 
Partners' capital account, ending balance
334,090 
169,712 
 
 
Series A
 
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
 
Partners' capital account, beginning balance (in shares)
9,210,000 
5,745,000 
5,279,000 
5,142,857 
Partners' capital account, beginning balance
169,712 
107,965 
94,811 
 
Issuance of units (in shares)
0 
2,571,000 
0 
 
Issuance of units
0 
44,769 
0 
 
Paid in kind unit distributions
19,123 
16,978 
15,812 
 
Partners' capital account, ending balance (in shares)
10,107,000 
9,210,000 
5,745,000 
5,142,857 
Partners' capital account, ending balance
181,386 
169,712 
107,965 
 
Series C
 
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
 
Partners' capital account, beginning balance (in shares)
0 
0 
0 
 
Partners' capital account, beginning balance
0 
0 
0 
 
Issuance of units (in shares)
8,571,000 
0 
0 
 
Issuance of units
115,457 
0 
0 
 
Paid in kind unit distributions
9,487 
0 
0 
 
Partners' capital account, ending balance (in shares)
8,792,000 
0 
0 
 
Partners' capital account, ending balance
118,229 
0 
0 
 
Series D
 
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
 
Partners' capital account, beginning balance (in shares)
0 
0 
0 
 
Partners' capital account, beginning balance
0 
0 
0 
 
Issuance of units (in shares)
2,333,000 
0 
0 
 
Issuance of units
34,475 
0 
0 
 
Paid in kind unit distributions
963 
0 
2,436 
 
Partners' capital account, ending balance (in shares)
2,333,000 
0 
0 
 
Partners' capital account, ending balance
34,475 
0 
0 
 
Paid-in-kind units
 
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
 
Paid in kind unit distributions
14,446 
18,351 
17,810 
 
Paid-in-kind units |
Series A
 
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
 
Paid in kind unit distributions (in shares)
897,000 
894,000 
466,000 
 
Paid in kind unit distributions
11,674 
16,978 
13,154 
 
Paid-in-kind units |
Series C
 
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
 
Paid in kind unit distributions (in shares)
221,000 
0 
0 
 
Paid in kind unit distributions
2,772 
0 
0 
 
Paid-in-kind units |
Series D
 
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
 
Paid in kind unit distributions (in shares)
0 
0 
0 
 
Paid in kind unit distributions
$ 0 
$ 0 
$ 0 
 
Convertible Preferred Units Series A-1 Convertible Preferred Units (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
0 Months Ended 12 Months Ended
Dec. 31, 2016
Apr. 25, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Series A
Apr. 15, 2013
Series A
Dec. 31, 2016
Series A
Dec. 31, 2015
Series A
Dec. 31, 2014
Series A
Dec. 31, 2013
Series A
Apr. 15, 2013
Series A
High Point
Class of Stock [Line Items]
 
 
 
 
 
 
 
 
 
 
 
Partnership cancellation of subordinated units (percent)
 
 
 
 
 
90.00% 
 
 
 
 
 
Issuance of Series C Units and Warrant in connection with the Emerald Transactions
$ 120,000 
$ 120,000 
$ 0 
$ 0 
 
 
 
 
 
 
$ 15,000 
Partners' capital account (in shares)
 
 
 
 
 
5,142,857 
10,107,000 
9,210,000 
5,745,000 
5,279,000 
 
Partners' capital account (in dollars per share)
 
 
 
 
 
$ 0.50 
 
 
 
 
 
Shares issued upon conversion (in shares)
 
 
 
 
 
1 
 
 
 
 
 
Investment options, exercise price (in dollars per share)
 
 
 
 
$ 15.87 
 
$ 15.87 
 
 
 
 
Debt Obligations Credit Agreement (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended 12 Months Ended 0 Months Ended 0 Months Ended
Apr. 25, 2016
Dec. 31, 2016
Apr. 25, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Minimum
Dec. 31, 2016
Maximum
Apr. 25, 2016
Federal Funds
Apr. 25, 2016
Eurodollar
Dec. 31, 2016
Senior Notes
3.77% Senior Notes, due 2031
Sep. 30, 2016
Senior Notes
3.77% Senior Notes, due 2031
Apr. 25, 2016
Fiscal Quarter Ending December 31, 2014
Fourth Amendment
Base Rate
Minimum
Apr. 25, 2016
Fiscal Quarter Ending December 31, 2014
Fourth Amendment
Base Rate
Maximum
Apr. 25, 2016
Fiscal Quarter Ending December 31, 2014
Fourth Amendment
Eurodollar
Minimum
Apr. 25, 2016
Fiscal Quarter Ending December 31, 2014
Fourth Amendment
Eurodollar
Maximum
Mar. 8, 2017
Subsequent Event
Feb. 12, 2014
Revolving Credit Facility
JPE Revolving Credit Agreement
Feb. 12, 2014
Revolving Credit Facility
JPE Revolving Credit Agreement
Federal Funds
Feb. 12, 2014
Revolving Credit Facility
JPE Revolving Credit Agreement
Adjusted LIBOR
Feb. 12, 2014
Revolving Credit Facility
JPE Revolving Credit Agreement
Prime
Feb. 12, 2014
Revolving Credit Facility
JPE Revolving Credit Agreement
LIBOR
Feb. 12, 2014
Letter of Credit
JPE Revolving Credit Agreement
Debt Instrument [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Line of credit facility, current borrowing capacity
 
 
$ 750.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Line of credit facility, maximum borrowing capacity upon increase
 
 
900.0 
 
 
 
 
 
 
 
 
 
 
 
 
1,100.0 
 
 
 
 
 
 
Basis spread on variable rate
 
 
 
 
 
 
 
 
 
 
 
2.00% 
3.25% 
1.00% 
2.25% 
 
 
0.50% 
1.00% 
1.25% 
2.25% 
 
Debt instrument, interest rate (percent)
 
 
 
 
 
 
 
0.50% 
1.00% 
3.77% 
3.77% 
 
 
 
 
 
 
 
 
 
 
 
Unused capacity, commitment fee percentage
0.50% 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Ratio of indebtedness to net capital
 
4.07 
 
 
 
 
4.75 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Ratio of indebtedness to net capital, after allowed acquisition
 
 
 
 
 
 
5.25 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Interest coverage ratio
 
7.43 
 
 
 
2.5 
 
 
 
1.20 
 
 
 
 
 
 
 
 
 
 
 
 
Debt, weighted average interest rate
 
4.29% 
 
3.67% 
3.80% 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Letters of credit outstanding amount
 
7.4 
 
1.8 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Revolving credit facility
 
711.3 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Line of credit facility, remaining borrowing capacity
 
31.3 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Line of credit facility, maximum borrowing capacity
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 900.0 
$ 275.0 
 
 
 
 
$ 100.0 
Convertible Preferred Units Series A-2 Convertible Preferred Units (Details) (Series A-2, USD $)
0 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Jul. 27, 2015
Class of Stock [Line Items]
 
 
 
 
Issuance of units
 
 
$ 45,000,000 
 
Investment options, exercise price (in dollars per share)
$ 15.87 
$ 17.50 
 
 
Call right defined acquisition, value
 
 
 
$ 100,000,000 
Magnolia Infrastructure Partners, LLC |
Issuance of Preferred Units
 
 
 
 
Class of Stock [Line Items]
 
 
 
 
Partners' capital account, units, sold in private placement (in shares)
 
 
2,571,430 
 
Debt Obligations 8.50% Senior Notes (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended 0 Months Ended 24 Months Ended
Dec. 28, 2016
Dec. 28, 2016
Dec. 28, 2016
Senior Notes
8.50% Senior Notes, due 2021
Dec. 31, 2016
Senior Notes
8.50% Senior Notes, due 2021
Dec. 28, 2016
Senior Notes
8.50% Senior Notes, due 2021
Dec. 14, 2018
Scenario, Forecast
Senior Notes
8.50% Senior Notes, due 2021
Dec. 14, 2018
Scenario, Forecast
Senior Notes
8.50% Senior Notes, due 2021
Maximum
Dec. 14, 2018
Scenario, Forecast
Senior Notes
8.50% Senior Notes, due 2021
Minimum
Debt Instrument [Line Items]
 
 
 
 
 
 
 
 
Debt instrument, interest rate (percent)
 
 
 
8.50% 
8.50% 
 
 
 
Proceeds from issuance of long-term debt
$ 294.0 
 
 
 
 
 
 
 
Debt issuance costs
 
(6.0)
 
 
 
 
 
 
Proceeds from issuance of senior long-term debt
 
 
291.3 
 
 
 
 
 
Additional debt issuance costs
 
$ (2.7)
 
 
 
 
 
 
Debt instrument, redemption price, percentage of principal amount redeemed
 
 
 
 
 
 
35.00% 
 
Debt instrument, redemption price, percentage
 
 
108.50% 
 
 
 
 
 
Debt instrument, redemption price, aggregate principal amount outstanding
 
 
 
 
 
 
 
65.00% 
Debt instrument, redemption price, equity offer period
 
 
 
 
 
180 days 
 
 
Convertible Preferred Units Series C (Details) (USD $)
0 Months Ended 12 Months Ended 0 Months Ended
Apr. 25, 2016
Dec. 31, 2016
Series C
Apr. 25, 2016
Series C
Dec. 31, 2016
Series C
Dec. 31, 2015
Series C
Dec. 31, 2014
Series C
Apr. 25, 2016
Series C
Apr. 25, 2017
Scenario, Forecast
Series C
Apr. 25, 2016
Issuance of Preferred Units
ArcLight
Series C
Class of Stock [Line Items]
 
 
 
 
 
 
 
 
 
Issuance of units (in shares)
 
 
 
8,571,000 
0 
0 
 
 
8,571,429 
Investment options, exercise price (in dollars per share)
 
$ 13.95 
$ 14.00 
 
 
 
 
 
 
Number of securities called by warrants (in shares)
800,000 
 
 
 
 
 
800,000 
 
 
Exercise price of warrants (in dollars per share)
$ 7.25 
 
 
 
 
 
$ 7.25 
 
 
Warrant, exercisable period
 
 
7 years 
7 years 
 
 
 
 
 
Number of units in warrant calculation (in shares)
 
 
 
 
 
 
 
400,000 
 
Stipulated deduction in warrant calculation
 
 
 
 
 
 
 
$ 45,000,000 
 
Fair value of warrant unit (in dollars per share)
 
 
 
$ 4.41 
 
 
 
 
 
Expected dividend rate
 
 
 
18.00% 
 
 
 
 
 
Expected volatility rate
 
 
 
42.00% 
 
 
 
 
 
Issuance and exercise of warrants
 
 
 
$ 4,500,000 
 
 
 
 
 
Debt Obligations Debt Instrument, Redemption Price (Details) (Senior Notes, 8.50% Senior Notes, due 2021)
0 Months Ended
Dec. 28, 2016
Debt Instrument [Line Items]
 
Debt instrument, redemption price, percentage
108.50% 
2018
 
Debt Instrument [Line Items]
 
Debt instrument, redemption price, percentage
104.25% 
2019
 
Debt Instrument [Line Items]
 
Debt instrument, redemption price, percentage
102.125% 
2020 and thereafter
 
Debt Instrument [Line Items]
 
Debt instrument, redemption price, percentage
100.00% 
Convertible Preferred Units Series D (Details) (USD $)
Dec. 31, 2016
Apr. 25, 2016
Dec. 31, 2015
Oct. 8, 2015
Sep. 18, 2015
Sep. 15, 2015
Aug. 15, 2014
Jan. 29, 2014
Dec. 31, 2016
Series D
Oct. 31, 2016
Series D
Class of Stock [Line Items]
 
 
 
 
 
 
 
 
 
 
Limited partners, units issued (in shares)
51,351,000 
 
50,504,000 
151,937 
7,500,000 
7,500,000 
4,622,352 
3,400,000 
 
2,333,333 
Shares issued (in dollars per share)
 
 
 
 
 
 
 
 
 
$ 15.00 
Units issued, closing fee
 
 
 
 
 
 
 
 
 
1.50% 
Number of securities called by warrants (in shares)
 
800,000 
 
 
 
 
 
 
 
700,000 
Exercise price of warrants (in dollars per share)
 
$ 7.25 
 
 
 
 
 
 
$ 14.98 
$ 22.00 
Partners' capital account (in dollars per share)
 
 
 
 
 
 
 
 
$ 0.4125 
 
Shares issued upon conversion (in shares)
 
 
 
 
 
 
 
 
1 
 
Series D call right, ratio multiplier
 
 
 
 
 
 
 
 
 
1.03 
Debt Obligations 3.77% Senior Notes (Details) (USD $)
0 Months Ended
Dec. 31, 2016
Dec. 28, 2016
Sep. 30, 2016
Senior Notes
3.77% Senior Notes, due 2031
Dec. 31, 2016
Senior Notes
3.77% Senior Notes, due 2031
Sep. 30, 2016
Senior Notes
3.77% Senior Notes, due 2031
Debt Instrument [Line Items]
 
 
 
 
 
Debt instrument
 
 
 
 
$ 60,000,000.0 
Debt instrument, interest rate (percent)
 
 
 
3.77% 
3.77% 
Repayments, average quarterly principal payment
 
 
1,100,000 
 
 
Proceeds from debt
 
 
57,700,000 
 
 
Debt issuance costs
 
6,000,000 
 
 
2,300,000 
Restricted cash and investments
24,500,000 
 
 
 
 
Interest coverage ratio
7.43 
 
 
1.20 
 
Debt instrument, fair value
 
 
 
$ 54,600,000 
 
Partners' Capital Outstanding Units (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
General Partner
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
Partners' capital account, beginning balance (in shares)
536,000 
392,000 
185,000 
Issuance of units (in shares)
144,000 
144,000 
207,000 
Partners' capital account, ending balance (in shares)
680,000 
536,000 
392,000 
Limited Partner
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
Partners' capital account, beginning balance (in shares)
50,504,000 
42,640,000 
13,394,000 
Issuance of units (in shares)
248,000 
7,654,000 
23,025,000 
Redemption / return of escrow units (in shares)
(1,034,000)
 
 
Conversion, Exercise of units, warrants (in shares)
1,350,000 
152,000 
300,000 
Issuance of common units in JP Development transaction (in shares)
 
 
5,841,000 
Partners' capital account, ending balance (in shares)
51,351,000 
50,504,000 
42,640,000 
Limited Partner |
Long Term Incentive Plan
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
Issuance of units (in shares)
283,000 
58,000 
80,000 
Series B
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
Partners' capital account, beginning balance (in shares)
1,350,000 
1,255,000 
0 
Issuance of units (in shares)
 
95,000 
87,000 
Conversion, Exercise of units, warrants (in shares)
(1,350,000)
 
 
Partners' capital account, ending balance (in shares)
0 
1,350,000 
1,255,000 
Series D
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
Partners' capital account, beginning balance (in shares)
0 
0 
0 
Issuance of units (in shares)
2,333,000 
0 
0 
Issuance of units (in shares)
 
 
1,008,000 
Redemption / return of escrow units (in shares)
 
 
(1,008,000)
Partners' capital account, ending balance (in shares)
2,333,000 
0 
0 
Okeanos
 
 
 
Increase (Decrease) in Partners' Capital [Roll Forward]
 
 
 
Issuance of units (in shares)
1,168,000 
 
 
Partners' Capital Textual (Details)
12 Months Ended
Dec. 31, 2016
Equity [Abstract]
 
General partner interest
1.30% 
Limited partner interest
98.70% 
Partners' Capital Series B Units (Details) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Oct. 8, 2015
Sep. 18, 2015
Sep. 15, 2015
Aug. 15, 2014
Jan. 29, 2014
Dec. 31, 2015
Series B
Dec. 31, 2014
Series B
Jan. 31, 2014
Series B
Jan. 31, 2014
Series B
Feb. 1, 2016
Series B
Dec. 31, 2015
Dividend Paid
Series B
Dec. 31, 2014
Dividend Paid
Series B
Class of Stock [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Limited partners, units issued (in shares)
51,351,000 
50,504,000 
151,937 
7,500,000 
7,500,000 
4,622,352 
3,400,000 
 
 
1,168,225 
 
 
94,923 
86,461 
Issuance of units
 
 
 
 
 
 
 
 
 
 
$ 30,000,000 
 
 
 
Shares issued upon conversion (in shares)
 
 
 
 
 
 
 
 
 
 
 
1 
 
 
Fair value, paid in kind distributions
 
 
 
 
 
 
 
$ 1,400,000 
$ 2,200,000 
 
 
 
 
 
Partners' Capital Equity Offerings (Details) (USD $)
0 Months Ended 12 Months Ended 12 Months Ended 0 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended 0 Months Ended
Oct. 8, 2015
Sep. 15, 2015
Aug. 15, 2014
Jan. 29, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Oct. 8, 2015
Sep. 18, 2015
Sep. 15, 2015
Aug. 15, 2014
Jan. 29, 2014
Dec. 31, 2016
Limited Partner
Dec. 31, 2015
Limited Partner
Dec. 31, 2014
Limited Partner
Oct. 14, 2014
Limited Partner
Costar Midstream, L.L.C.
Feb. 29, 2016
Interest rate swap
Oct. 7, 2014
Common Units
IPO
Dec. 31, 2014
Common Units
IPO
Oct. 7, 2014
Existing Common Units
Oct. 7, 2014
Existing Common Units
Prior To Closing Of I P O
Feb. 12, 2014
Lonestar Midstream Holdings L L C [Member]
Class A Common Unit
Feb. 12, 2014
Lonestar Midstream Holdings L L C [Member]
Class A Common Unit
Oct. 7, 2014
Preferred Units Series D
Mar. 28, 2014
Preferred Units Series D
Lonestar Midstream Holdings L L C [Member]
Mar. 28, 2014
Preferred Units Series D
Lonestar Midstream Holdings L L C [Member]
Class of Stock [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Aggregate offering price
 
 
 
 
$ 100,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Partners' capital account, units, sold in public offering (in shares)
 
 
 
 
248,561 
 
 
 
 
 
 
 
 
 
 
 
 
7,940,625 
13,750,000.000 
 
 
 
 
 
 
 
Proceeds from issuance of common units, net
 
 
 
 
2,900,000 
 
 
 
 
 
 
 
 
 
 
 
 
252,700,000 
 
 
 
8,000,000 
 
 
 
 
Limited partners' offering costs
 
 
 
 
300,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Authorized amount remaining
 
 
 
 
96,800,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Limited partners, units issued (in shares)
 
 
 
 
51,351,000 
50,504,000 
 
151,937 
7,500,000 
7,500,000 
4,622,352 
3,400,000 
 
 
 
 
 
 
 
 
 
 
190,000 
 
 
1,008,000 
Sale of stock (in dollars per share)
 
 
 
 
 
 
 
$ 11.31 
 
$ 11.31 
$ 25.8074999481 
$ 26.75 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Issuance of common units, net of offering costs
1,700,000 
81,000,000 
119,300,000 
86,900,000 
 
 
 
 
 
 
 
 
 
85,465,000 
609,707,000 
 
 
 
 
 
 
 
 
 
 
 
Common units issued (shares)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
6,892,931 
 
 
 
 
 
 
 
 
 
 
Acquisitions partially funded by the issuance of common units
 
 
 
 
0 
3,442,000 
414,396,000 
 
 
 
 
 
 
 
 
147,300,000.0 
 
 
 
 
 
 
 
 
 
 
Escrowed units returned to partnership (in shares)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1,034,483 
 
 
 
 
 
 
 
 
 
Distribution declared per common unit (in dollars per share)
 
 
 
 
$ 3.01 
$ 3.17 
$ 1.85 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Partners' Capital Account, Sale of Units, Price per Unit
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 34.63 
 
 
 
 
 
 
 
 
Paid in kind unit distributions
 
 
 
 
138,685,000 
118,762,000 
137,775,000 
 
 
 
 
 
101,561,000 
93,622,000 
114,612,000 
 
 
 
 
 
 
 
 
 
 
 
Partners Capital Units Resulting from Unit Split
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
22,700,000 
11,848,735 
 
 
 
 
 
Partners' Capital Account, Units, Converted
 
 
 
 
 
 
 
 
 
 
 
 
1,350,000 
152,000 
300,000 
 
 
 
 
 
 
 
 
 
 
 
Limited partner interest
 
 
 
 
98.70% 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Proceeds from issuance of preferred units
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
40,000,000 
 
Redemption of outstanding units
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 42,400,000 
 
 
Partners' Capital General Partner Units (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Class of Stock [Line Items]
 
 
 
General partners' capital account, period distribution amount
$ 2.0 
$ 1.9 
$ 5.7 
General partners' interest units issued (in shares)
680,000 
536,000 
 
General Partner
 
 
 
Class of Stock [Line Items]
 
 
 
General partners' interest units issued (in shares)
143,900 
143,517 
206,810 
Partners' Capital Distributions (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
$ 138,685 
$ 118,762 
$ 137,775 
Series A
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
19,123 
16,978 
15,812 
Series B
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
0 
1,373 
2,220 
Series C
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
9,487 
0 
0 
Series D
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
963 
0 
2,436 
Limited Partner
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
101,561 
93,622 
114,612 
General Partner
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
7,551 
6,789 
2,695 
Paid
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
112,136 
100,411 
119,965 
Paid |
Series A
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
4,935 
0 
2,658 
Paid |
Series C
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
3,089 
0 
0 
Paid |
Limited Partner
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
101,561 
93,622 
114,612 
Paid |
General Partner
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
2,551 
6,789 
2,695 
Accrued
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
7,103 
0 
0 
Accrued |
Series A
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
2,514 
0 
0 
Accrued |
Series C
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
3,626 
0 
0 
Accrued |
Limited Partner
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
0 
0 
0 
Paid-in-kind units
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
14,446 
18,351 
17,810 
Paid-in-kind units |
Series A
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
11,674 
16,978 
13,154 
Paid-in-kind units |
Series B
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
0 
1,373 
2,220 
Paid-in-kind units |
Series C
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
2,772 
0 
0 
Paid-in-kind units |
Series D
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
0 
0 
0 
Accrued |
General Partner
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
0 
0 
0 
Additional Blackwater acquisition consideration
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
5,000 
0 
0 
Additional Blackwater acquisition consideration |
General Partner
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
5,000 
0 
0 
American Midstream Partners L. P. |
Accrued |
Series D
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
963 
0 
0 
JPE Energy Partners |
Paid-in-kind units |
Series D
 
 
 
Class of Stock [Line Items]
 
 
 
Paid in kind unit distributions
$ 0 
$ 0 
$ 2,436 
Partners' Capital Distributions Textual (Details)
3 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Jan. 26, 2017
Subsequent Event
Dec. 31, 2016
Minimum
Dec. 31, 2016
Maximum
Class of Stock [Line Items]
 
 
 
 
 
 
 
Distribution declared per common unit (in dollars per share)
 
$ 3.01 
$ 3.17 
$ 1.85 
$ 0.4125 
 
 
Distribution made to limited partner (in dollars per share)
 
 
 
 
$ 1.65 
 
 
Fair value input, option value (in dollars per share)
 
 
 
 
 
$ 0.02 
$ 9.68 
Discount rate
9.50% 
 
 
 
 
5.57% 
10.00% 
Fair Value input, distribution growth rate
 
1.00% 
 
 
 
 
 
Net Income (Loss) per Limited Partner Unit (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 12 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended 3 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Series C Preferred Stock
Dec. 31, 2015
Series C Preferred Stock
Dec. 31, 2014
Series C Preferred Stock
Dec. 31, 2016
Series D
Dec. 31, 2015
Series D
Dec. 31, 2014
Series D
Dec. 31, 2016
Series B
Dec. 31, 2015
Series B
Dec. 31, 2014
Series B
Dec. 31, 2016
General Partner
Dec. 31, 2015
General Partner
Dec. 31, 2014
General Partner
Dec. 31, 2016
General Partner
Dividend Declared
Dec. 31, 2015
General Partner
Dividend Declared
Dec. 31, 2014
General Partner
Dividend Declared
Dec. 31, 2016
JPE Energy Partners
Dec. 31, 2016
ArcLight
Dec. 31, 2016
ArcLight
Dec. 31, 2016
Other Unitholders
Dec. 31, 2016
Other Unitholders
Mar. 8, 2017
Subsequent Event
Mar. 8, 2017
Subsequent Event
General Partner
Mar. 8, 2017
Subsequent Event
ArcLight
Mar. 8, 2017
Subsequent Event
Other Unitholders
Oct. 7, 2014
Existing Common Units
Oct. 7, 2014
IPO
Common Units
Dec. 31, 2014
IPO
Common Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
General partners' interest units outstanding (in shares)
680,000 
 
 
 
536,000 
 
 
 
680,000 
536,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
36,700,000 
 
18,700,000 
 
18,000,000 
 
 
 
 
 
 
 
Limited partner interest
 
 
 
 
 
 
 
 
98.70% 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
50.90% 
 
49.10% 
 
 
 
 
 
 
 
 
Partners Capital Account Common Units Conversion Ratio
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
0.5225 
0.5775 
 
 
 
Partners' Capital Account, Units, Converted
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
20,200,000 
 
9,800,000 
10,400,000 
 
 
 
General partners' interest units issued (in shares)
680,000 
 
 
 
536,000 
 
 
 
680,000 
536,000 
 
 
 
 
 
 
 
 
 
 
143,900 
143,517 
206,810 
 
 
 
 
 
 
 
 
 
20,200,000 
 
 
 
 
 
Partners Capital Units Resulting from Unit Split
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
22,700,000 
 
 
Partners' capital account, units, sold in public offering (in shares)
 
 
 
 
 
 
 
 
248,561 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7,940,625 
13,750,000 
Net loss from continuing operations
$ (8,413)
$ (5,488)
$ (12,156)
$ (17,772)
$ (159,311)
$ (15,607)
$ (11,977)
$ (12,523)
$ (43,829)
$ (199,418)
$ (55,496)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Less: Net income (loss) attributable to noncontrolling interests
574 
1,241 
954 
(3)
(63)
24 
22 
4 
2,766 
(13)
3,993 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net loss from continuing operations attributable to the Partnership
 
 
 
 
 
 
 
 
(46,595)
(199,405)
(59,489)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Distributions on Units
 
 
 
 
 
 
 
 
19,138 
16,978 
14,492 
9,487 
0 
0 
963 
0 
0 
0 
1,373 
2,220 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Distributions
 
 
 
 
 
 
 
 
138,685 
118,762 
137,775 
 
 
 
 
 
 
 
 
 
7,551 
6,789 
2,695 
2,550 
6,790 
2,694 
 
 
 
 
 
 
 
 
 
 
 
 
Net income (loss) from continuing operations attributable to JPE preferred units
 
 
 
 
 
 
 
 
0 
0 
656 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income (loss) from continuing operations attributable to predecessor capital
 
 
 
 
 
 
 
 
0 
0 
(2,014)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
General partner's share in undistributed loss
 
 
 
 
 
 
 
 
(1,691)
(3,498)
(1,325)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net loss from continuing operations attributable to Limited Partners
 
 
 
 
 
 
 
 
(77,042)
(221,048)
(76,212)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income (loss) from discontinued operations attributable to Limited Partners
 
 
 
 
 
 
 
 
(4,715)
(423)
(14,545)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net loss attributable to Limited Partners
 
 
 
 
 
 
 
 
$ (81,757)
$ (221,471)
$ (90,757)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted average number of common units used in computation of Limited Partners' net loss per common unit - basic and diluted (in shares)
 
 
 
 
 
 
 
 
51,176,000 
45,050,000 
27,524,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Limited Partners' net loss from continuing operations per unit (basic and diluted) (in dollars per share)
$ (0.33)
$ (0.29)
$ (0.40)
$ (0.49)
$ (3.58)
$ (0.51)
$ (0.41)
$ (0.41)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Loss from continuing operations, basic and diluted (in usd per share)
 
 
 
 
 
 
 
 
$ (1.51)
$ (4.91)
$ (2.77)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Loss from discontinued operations, basic and diluted (in usd per share)
$ (0.27)
$ (0.05)
$ 0.07 
$ 0.16 
$ (0.27)
$ (0.02)
$ 0.03 
$ 0.25 
$ (0.09)
$ (0.01)
$ (0.52)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Limited partners’ net income (loss) per unit (basic and diluted) (in dollars per share)
$ (0.60)
$ (0.34)
$ (0.33)
$ (0.33)
$ (3.85)
$ (0.53)
$ (0.38)
$ (0.16)
$ (1.60)
$ (4.92)
$ (3.29)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Long Term Incentive Plan (Textual) (Details) (USD $)
1 Months Ended 12 Months Ended 12 Months Ended 3 Months Ended 1 Months Ended 12 Months Ended
Aug. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Feb. 11, 2016
Dec. 31, 2013
Dec. 31, 2016
Performance Shares
Dec. 31, 2015
Performance Shares
Sep. 30, 2016
Operating Expense
Performance Shares
Nov. 30, 2015
Operating Expense
Performance Shares
Sep. 30, 2016
September 2016
Dec. 31, 2016
JPE 2014 Long-Term Incentive Plan (“JPE LTIP”)
Phantom Units
Dec. 31, 2015
JPE 2014 Long-Term Incentive Plan (“JPE LTIP”)
Phantom Units
Subsequent Event [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Long-term incentive plan, increase in available awards (in shares)
 
 
 
 
 
6,000,000 
 
 
 
 
 
 
 
 
Long term incentive plan available for future grant (in shares)
 
15,484 
5,017,528 
15,484 
688,976 
 
 
 
 
 
 
 
3,642,700 
 
Grants issued under long term incentive plan
 
 
25.00% 
 
 
 
 
 
 
 
 
 
 
 
Granted (in shares)
30,000 
200,000 
75,000 
200,000 
 
 
 
 
 
 
 
45,000 
 
 
Award vesting period
 
3 years 
 
 
 
 
 
 
 
 
 
 
 
 
Equity compensation expense
 
 
$ 3,600,000 
$ 3,800,000 
$ 1,500,000 
 
 
$ 900,000 
$ 500,000 
$ 1,000,000 
 
 
$ 1,700,000 
$ 800,000 
Total fair value of vested units
 
 
2,400,000 
2,600,000 
1,400,000 
 
 
 
 
 
 
 
 
 
Compensation cost not yet recognized
 
 
4,200,000 
 
 
 
 
100,000 
 
 
 
 
 
 
Weighted average period cost recognized
 
 
2 years 2 months 12 days 
 
 
 
 
 
 
 
 
 
 
 
Aggregate intrinsic value, nonvested
 
4,609,000 
22,674,000 
4,609,000 
3,964,000 
 
2,045,000 
1,500,000 
 
 
2,000,000 
 
 
 
Granted (in dollars per share)
 
$ 7.50 
$ 13.13 
$ 7.50 
 
 
 
 
 
 
 
 
 
 
Options, outstanding, weighted average exercise price (in dollars per share)
$ 12.00 
$ 7.50 
$ 9.03 
$ 7.50 
$ 0.00 
 
 
 
 
 
 
$ 13.88 
 
 
Award vesting rights
 
 
 
 
 
 
 
 
 
 
 
25.00% 
 
 
Compensation not yet recognized, stock options
 
 
$ 200,000 
 
 
 
 
 
 
 
 
 
 
 
Long-Term Incentive Plan (Unit-based Awards) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
 
 
 
 
Outstanding shares (in shares)
569,759 
201,132 
75,529 
 
Granted (in shares)
1,374,226 
546,329 
188,946 
 
Forfeited (in shares)
(411,794)
(31,298)
(12,009)
 
Vested (in shares)
(286,348)
(146,404)
(51,334)
 
Outstanding shares (in shares)
1,245,843 
569,759 
201,132 
 
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value, Amount Per Share [Abstract]
 
 
 
 
Outstanding shares (in dollars per share)
$ 13.15 
$ 19.85 
$ 17.62 
 
Granted (in dollars per share)
$ 2.14 
$ 12.25 
$ 20.80 
 
Forfeited (in dollars per share)
$ (2.60)
$ (15.62)
$ (18.28)
 
Vested (in dollars per share)
$ (12.18)
$ (18.47)
$ (20.89)
 
Outstanding shares (in dollars per share)
$ 4.72 
$ 13.15 
$ 19.85 
 
Aggregate intrinsic value, nonvested
$ 22,674 
$ 4,609 
$ 3,964 
$ 2,045 
JPE 2014 Long-Term Incentive Plan (“JPE LTIP”) |
Phantom Units
 
 
 
 
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
 
 
 
 
Outstanding shares (in shares)
226,979,000 
0 
 
 
Granted (in shares)
209,507,000 
287,750,000 
 
 
Forfeited (in shares)
(55,778,000)
(4,766,000)
 
 
Vested (in shares)
(67,716,000)
(56,005,000)
 
 
Outstanding shares (in shares)
312,992,000 
226,979,000 
 
 
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value, Amount Per Share [Abstract]
 
 
 
 
Outstanding shares (in dollars per share)
$ 22.5 
$ 0.00 
 
 
Granted (in dollars per share)
$ 9.23 
$ 22.25 
 
 
Forfeited (in dollars per share)
$ (19.51)
$ (22.34)
 
 
Vested (in dollars per share)
$ (18.74)
$ (21.23)
 
 
Outstanding shares (in dollars per share)
$ 14.96 
$ 22.5 
 
 
Long-Term Incentive Plan Assumptions (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
 
 
Weighted average common unit price volatility
61.10% 
47.00% 
Expected distribution yield
12.60% 
26.30% 
Weighted average expected term (in years)
4 years 1 month 6 days 
3 years 6 months 
Weighted average risk-free rate
1.10% 
1.30% 
Long-Term Incentive Plan Option Grant Awards (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
0 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Aug. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
 
 
 
 
 
 
 
Outstanding beginning balance (in shares)
275,000 
200,000 
 
 
200,000 
0 
 
Granted (in shares)
 
 
30,000 
200,000 
75,000 
200,000 
 
Vested (in shares)
 
 
 
 
0 
0 
 
Forfeited (in shares)
 
 
 
 
0 
0 
 
Outstanding ending balance (in shares)
 
 
 
200,000 
275,000 
200,000 
 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
 
 
 
 
 
 
 
Outstanding beginning balance (in dollars per share)
$ 9.03 
$ 7.50 
 
 
$ 7.50 
$ 0.00 
 
Granted (in dollars per share)
 
 
 
$ 7.50 
$ 13.13 
$ 7.50 
 
Vested (in dollars per share)
 
 
 
 
$ 0.00 
$ 0.00 
 
Forfeited (in dollars per share)
 
 
 
 
$ 0.00 
$ 0.00 
 
Outstanding ending balance (in dollars per share)
 
 
$ 12.00 
$ 7.50 
$ 9.03 
$ 7.50 
 
Weighted-Average Grant Date Fair Value per Unit (in dollars per share)
 
 
 
$ 0.33 
$ 0.96 
$ 0.33 
$ 0.00 
Weighted-Average Grant Date Fair Value per Unit (in dollars per share)
 
 
 
 
$ 2.65 
$ 0.33 
 
Aggregate Intrinsic Value
 
 
 
$ 118 
$ 2,522 
$ 118 
$ 0 
Weighted Average Remaining Contractual Life
4 years 11 months 23 days 
4 years 2 months 12 days 
 
 
 
 
 
Income Taxes Income Tax (Expense) Benefit (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]
 
 
 
Current income tax expense
$ (521)
$ (648)
$ (146)
Deferred income tax expense
$ (2,059)
$ (1,237)
$ (710)
Effective income tax rate
6.30% 
1.00% 
1.60% 
Income Taxes Narrative (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]
 
 
 
US Federal statutory tax rate
34.00% 
34.00% 
34.00% 
Operating Loss Carryforwards
$ 16.1 
 
 
Income Taxes Income Tax Expense (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]
 
 
 
Net income (loss) before income tax expense
$ (41,249)
$ (197,533)
$ (54,640)
US Federal statutory tax rate
34.00% 
34.00% 
34.00% 
Federal income tax (expense) benefit at statutory rate
14,025 
67,161 
18,578 
Partnership loss not subject to income tax (benefit)
(15,800)
(68,048)
(18,936)
State and local tax expense
(800)
(857)
(459)
Other
(5)
(141)
(39)
Income tax expense
$ (2,580)
$ (1,885)
$ (856)
Income Taxes Deferred Tax Assets and Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets:
 
 
Net operating loss carryforwards
$ 6,300 
$ 7,570 
Other
577 
493 
Total deferred tax assets
6,877 
8,063 
Deferred tax liabilities:
 
 
Property, plant and equipment
(15,082)
(14,236)
Deferred income tax liability, net
$ (8,205)
$ (6,173)
Commitments and Contingencies (Details Textual) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
 
 
 
Business exit costs
$ 9.1 
 
 
Rental expenses
$ 15.9 
$ 14.4 
$ 7.9 
Commitments and Contingencies (Contractual Obligations) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2016
Asset Retirement Obligation (2)
Dec. 31, 2016
Other
Dec. 31, 2016
Revolving Credit Agreements
Dec. 31, 2016
Senior Notes
8.50% Senior Notes, due 2021
Dec. 28, 2016
Senior Notes
8.50% Senior Notes, due 2021
Dec. 31, 2016
Senior Notes
3.77% Senior Notes, due 2031
Sep. 30, 2016
Senior Notes
3.77% Senior Notes, due 2031
Future Non Cancelable Commitment [Line Items]
 
 
 
 
 
 
 
 
2017
$ 15,604 
$ 6,499 
$ 7,428 
$ 0 
$ 0 
 
$ 1,677 
 
2018
5,313 
0 
4,507 
0 
0 
 
806 
 
2019
894,872 
0 
4,389 
888,250 
0 
 
2,233 
 
2020
4,969 
0 
2,670 
0 
0 
 
2,299 
 
2021
306,674 
0 
2,244 
0 
300,000 
 
4,430 
 
Thereafter
110,909 
44,363 
17,991 
0 
0 
 
48,555 
 
Total
$ 1,338,341 
$ 50,862 
$ 39,229 
$ 888,250 
$ 300,000 
 
$ 60,000 
 
Debt instrument, interest rate (percent)
 
 
 
 
8.50% 
8.50% 
3.77% 
3.77% 
Related- Party Transactions (Details Textual) (USD $)
12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Apr. 15, 2016
American Panther
Dec. 31, 2016
Mid Continent Business
Dec. 31, 2015
Mid Continent Business
Dec. 31, 2014
Mid Continent Business
Dec. 31, 2016
American Midstream, LLC
Dec. 31, 2015
American Midstream, LLC
Dec. 31, 2014
American Midstream, LLC
Dec. 31, 2016
General Partner
Dec. 31, 2015
General Partner
Dec. 31, 2016
General Partner
Accrued Expenses and Other Current Liabilities
Dec. 31, 2015
General Partner
Accrued Expenses and Other Current Liabilities
Dec. 31, 2016
Affiliated Entity
Dec. 31, 2015
Affiliated Entity
Dec. 31, 2014
Affiliated Entity
Dec. 31, 2016
Affiliated Entity
Services
Dec. 31, 2015
Affiliated Entity
Services
Dec. 31, 2015
Affiliated Entity
Commodity sales
Dec. 31, 2016
Affiliated Entity
Other current assets
Dec. 31, 2015
Affiliated Entity
Other current assets
Dec. 31, 2016
Affiliated Entity
American Panther
Dec. 31, 2016
Affiliated Entity
American Panther
Dec. 31, 2016
Affiliated Entity
Destin and Okeanos Pipelines
Dec. 31, 2016
J P Energy Development L P
Dec. 31, 2015
J P Energy Development L P
Dec. 31, 2014
J P Energy Development L P
Dec. 31, 2016
ArcLight
Dec. 31, 2015
ArcLight
Sep. 30, 2016
Blackwater
Dec. 31, 2013
Blackwater
Dec. 31, 2016
Vice President
CIMA Energy Ltd
Dec. 31, 2015
Vice President
CIMA Energy Ltd
Dec. 31, 2014
Vice President
CIMA Energy Ltd
Related Party Transaction [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Administrative and operational service expenses
 
 
 
 
 
 
 
$ 89,800,000 
$ 98,300,000 
$ 95,500,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Due to related party
 
 
 
 
 
 
 
 
 
 
 
 
3,900,000 
3,800,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Management fees revenue
 
 
 
 
 
 
 
 
 
 
 
 
 
 
800,000 
1,400,000 
900,000 
 
 
 
 
 
 
 
400,000 
100,000 
600,000 
600,000 
 
 
 
 
 
 
 
Monthly fee
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
50,000 
 
 
 
 
 
 
 
 
 
Corporate expenses
89,438,000 
65,327,000 
60,465,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
400,000 
 
 
 
 
 
 
 
 
 
 
 
 
Revenue from related parties
 
 
 
 
 
 
 
 
 
 
7,500,000 
3,000,000 
 
 
3,200,000 
3,000,000 
 
3,200,000 
2,200,000 
800,000 
 
 
 
 
 
 
 
 
 
 
 
 
3,600,000 
6,200,000 
10,100,000 
Related party transaction, purchases from related party
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2,400,000 
2,600,000 
 
 
4,300,000 
5,900,000 
3,700,000 
Direct operating expenses
71,544,000 
71,729,000 
58,048,000 
 
400,000 
6,000,000 
8,900,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
800,000 
 
 
 
 
 
 
 
 
 
 
 
 
Net receivable from related party
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2,100,000 
700,000 
 
 
 
 
7,900,000 
 
 
 
 
 
 
 
 
Proceeds from issuance of common units, net
2,900,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Range of outcomes
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5,000,000 
 
 
 
Accrued expenses
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5,000,000 
 
 
 
 
Noncontrolling interest, ownership percentage by parent (percent)
 
 
 
60.00% 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
60.00% 
 
 
 
 
 
 
 
 
 
 
 
Fees incurred
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1,200,000 
 
 
 
 
 
 
 
 
 
 
 
 
Transaction expenses
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 1,000,000 
 
 
 
 
 
 
 
 
 
 
Supplemental Cash Flow Information (Details) (USD $)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Apr. 25, 2016
Class of Stock [Line Items]
 
 
 
 
Interest payments, net of capitalized interest
$ 22,303,000 
$ 16,540,000 
$ 13,905,000 
 
Cash paid for taxes
530,000 
450,000 
108,000 
 
Increase (decrease) in accrued property, plant and equipment purchases
8,533,000 
(21,841,000)
35,018,000 
 
Contributions from general partner
7,500,000 
4,350,000 
0 
 
Acquisitions partially funded by the issuance of common units
0 
3,442,000 
414,396,000 
 
Assets acquired under capital lease
139,000 
0 
177,000 
 
Issuance of Series C Units and Warrant in connection with the Emerald Transactions
120,000,000 
0 
0 
120,000,000 
Accrued distributions
7,103,000 
0 
0 
 
Series C Preferred Stock
 
 
 
 
Class of Stock [Line Items]
 
 
 
 
Accrued distributions
14,446,000 
16,978,000 
13,154,000 
 
Limited Partner Series B Convertible Units
 
 
 
 
Class of Stock [Line Items]
 
 
 
 
Paid-in-kind distributions
0 
1,373,000 
2,220,000 
 
JPE Series D Units
 
 
 
 
Class of Stock [Line Items]
 
 
 
 
Paid-in-kind distributions
0 
0 
2,436,000 
 
Costar Midstream, L.L.C.
 
 
 
 
Class of Stock [Line Items]
 
 
 
 
Accrued distributions
5,000,000 
0 
0 
 
Cancellation of escrow units
$ 6,817,000 
$ 0 
$ 0 
 
Reportable Segments (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Segment information
 
 
 
 
 
 
 
 
 
 
 
 
Commodity Sales
 
 
 
 
 
 
 
 
 
$ 439,412 
$ 613,241 
$ 721,663 
Services
 
 
 
 
 
 
 
 
 
151,231 
135,718 
116,195 
Loss on commodity derivatives, net
 
 
 
 
 
 
 
 
 
(1,617)
1,345 
1,091 
Total revenue
175,872 
159,903 
152,253 
100,998 
162,826 
174,848 
227,693 
184,937 
 
589,026 
750,304 
838,949 
Cost of sales
 
 
 
 
 
 
 
 
 
393,351 
567,682 
672,948 
Direct operating expenses
 
 
 
 
 
 
 
 
 
71,544 
71,729 
58,048 
Corporate expenses
 
 
 
 
 
 
 
 
 
89,438 
65,327 
60,465 
Depreciation, amortization and accretion expense
 
 
 
 
 
 
 
 
 
90,882 
81,335 
57,818 
Loss on sale of assets, net
 
 
 
 
 
 
 
 
 
688 
2,860 
4,087 
Loss on impairment of property, plant and equipment
 
 
 
 
 
 
 
 
21,300 
697 
0 
21,344 
Loss on impairment of goodwill
2,700 
 
 
 
148,500 
 
 
 
 
2,654 
148,488 
0 
Interest expense
 
 
 
 
 
 
 
 
 
21,433 
20,077 
16,497 
Earnings in unconsolidated affiliates
 
 
 
 
 
 
 
 
 
(40,158)
(8,201)
(348)
Other (income) expense
 
 
 
 
 
 
 
 
 
(254)
(1,460)
1,096 
Loss on extinguishment of debt
 
 
 
 
 
 
 
 
 
0 
0 
1,634 
Income tax (expense) benefit
 
 
 
 
 
 
 
 
 
2,580 
1,885 
856 
Loss from continuing operations
(8,413)
(5,488)
(12,156)
(17,772)
(159,311)
(15,607)
(11,977)
(12,523)
 
(43,829)
(199,418)
(55,496)
Loss from discontinued operations, net of tax
(12,249)
(2,310)
2,675 
7,169 
(11,694)
(900)
1,575 
10,596 
 
(4,715)
(423)
(24,071)
Net income (loss)
 
 
 
 
 
 
 
 
 
(48,544)
(199,841)
(79,567)
Net income (loss) attributable to noncontrolling interests
574 
1,241 
954 
(3)
(63)
24 
22 
4 
 
2,766 
(13)
3,993 
Net loss attributable to the Partnership
(21,236)
(9,039)
(10,435)
(10,600)
(170,939)
(16,532)
(10,425)
(1,932)
 
(51,310)
(199,828)
(83,560)
Gross margin
59,396 
58,793 
59,016 
46,430 
48,176 
41,445 
44,921 
45,314 
 
 
 
 
Liquid Pipelines and Services
 
 
 
 
 
 
 
 
 
 
 
 
Segment information
 
 
 
 
 
 
 
 
 
 
 
 
Loss on impairment of goodwill
 
 
 
 
 
 
 
 
 
2,654 
29,896 
 
Terminalling Services
 
 
 
 
 
 
 
 
 
 
 
 
Segment information
 
 
 
 
 
 
 
 
 
 
 
 
Loss on impairment of goodwill
 
 
 
 
 
 
 
 
 
0 
0 
 
Commodity derivative instruments, net
 
 
 
 
 
 
 
 
 
 
 
 
Segment information
 
 
 
 
 
 
 
 
 
 
 
 
Loss on commodity derivatives, net
 
 
 
 
 
 
 
 
 
(2,679)
294 
(1,008)
Gain (loss) on derivatives, unrealized
 
 
 
 
 
 
 
 
 
10,327 
86 
641 
Losses on commodity derivatives, net |
Commodity derivative instruments, net
 
 
 
 
 
 
 
 
 
 
 
 
Segment information
 
 
 
 
 
 
 
 
 
 
 
 
Loss on commodity derivatives, net
 
 
 
 
 
 
 
 
 
(1,569)
1,632 
734 
Gain (loss) on derivatives, unrealized
 
 
 
 
 
 
 
 
 
(48)
(287)
357 
Segment assets: |
Gathering and Processing reporting segment [Member]
 
 
 
 
 
 
 
 
 
 
 
 
Segment information
 
 
 
 
 
 
 
 
 
 
 
 
Commodity Sales
 
 
 
 
 
 
 
 
 
91,444 
107,680 
148,198 
Services
 
 
 
 
 
 
 
 
 
22,558 
30,196 
15,248 
Loss on commodity derivatives, net
 
 
 
 
 
 
 
 
 
(833)
1,240 
1,050 
Total revenue
 
 
 
 
 
 
 
 
 
113,169 
139,116 
164,496 
Cost of sales
 
 
 
 
 
 
 
 
 
63,832 
72,960 
112,719 
Direct operating expenses
 
 
 
 
 
 
 
 
 
33,802 
35,250 
21,197 
Gross margin
 
 
 
 
 
 
 
 
 
48,245 
65,692 
51,213 
Segment assets: |
Liquid Pipelines and Services
 
 
 
 
 
 
 
 
 
 
 
 
Segment information
 
 
 
 
 
 
 
 
 
 
 
 
Commodity Sales
 
 
 
 
 
 
 
 
 
304,502 
457,448 
470,936 
Services
 
 
 
 
 
 
 
 
 
19,063 
23,008 
22,239 
Loss on commodity derivatives, net
 
 
 
 
 
 
 
 
 
(341)
0 
0 
Total revenue
 
 
 
 
 
 
 
 
 
323,224 
480,456 
493,175 
Cost of sales
 
 
 
 
 
 
 
 
 
293,618 
454,057 
468,137 
Direct operating expenses
 
 
 
 
 
 
 
 
 
10,091 
9,912 
7,209 
Gross margin
 
 
 
 
 
 
 
 
 
31,556 
26,399 
25,038 
Segment assets: |
Natural Gas Transportation Services
 
 
 
 
 
 
 
 
 
 
 
 
Segment information
 
 
 
 
 
 
 
 
 
 
 
 
Commodity Sales
 
 
 
 
 
 
 
 
 
21,999 
23,972 
70,964 
Services
 
 
 
 
 
 
 
 
 
18,109 
16,035 
12,925 
Loss on commodity derivatives, net
 
 
 
 
 
 
 
 
 
0 
0 
0 
Total revenue
 
 
 
 
 
 
 
 
 
40,108 
40,007 
83,889 
Cost of sales
 
 
 
 
 
 
 
 
 
21,288 
21,858 
70,100 
Direct operating expenses
 
 
 
 
 
 
 
 
 
5,923 
6,728 
6,975 
Gross margin
 
 
 
 
 
 
 
 
 
18,616 
18,073 
13,691 
Segment assets: |
Offshore Pipelines and Services
 
 
 
 
 
 
 
 
 
 
 
 
Segment information
 
 
 
 
 
 
 
 
 
 
 
 
Commodity Sales
 
 
 
 
 
 
 
 
 
6,812 
13,798 
20,044 
Services
 
 
 
 
 
 
 
 
 
40,502 
21,457 
24,426 
Loss on commodity derivatives, net
 
 
 
 
 
 
 
 
 
(7)
84 
41 
Total revenue
 
 
 
 
 
 
 
 
 
47,307 
35,339 
44,511 
Cost of sales
 
 
 
 
 
 
 
 
 
3,049 
9,914 
15,133 
Direct operating expenses
 
 
 
 
 
 
 
 
 
10,945 
9,425 
11,142 
Gross margin
 
 
 
 
 
 
 
 
 
82,346 
33,613 
29,089 
Segment assets: |
Terminalling Services
 
 
 
 
 
 
 
 
 
 
 
 
Segment information
 
 
 
 
 
 
 
 
 
 
 
 
Commodity Sales
 
 
 
 
 
 
 
 
 
14,655 
10,343 
11,521 
Services
 
 
 
 
 
 
 
 
 
50,999 
45,022 
41,357 
Loss on commodity derivatives, net
 
 
 
 
 
 
 
 
 
(436)
21 
0 
Total revenue
 
 
 
 
 
 
 
 
 
65,218 
55,386 
52,878 
Cost of sales
 
 
 
 
 
 
 
 
 
11,564 
8,893 
6,859 
Direct operating expenses
 
 
 
 
 
 
 
 
 
10,783 
10,414 
11,525 
Gross margin
 
 
 
 
 
 
 
 
 
$ 42,872 
$ 36,079 
$ 34,493 
Reportable Segments Assets (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting Information [Line Items]
 
 
Total assets
$ 2,349,321 
$ 1,751,889 
Segment assets: |
Gas Gathering and Processing Services
 
 
Segment Reporting Information [Line Items]
 
 
Total assets
530,889 
496,014 
Segment assets: |
Liquid Pipelines and Services
 
 
Segment Reporting Information [Line Items]
 
 
Total assets
425,389 
434,395 
Segment assets: |
Natural Gas Transportation Services
 
 
Segment Reporting Information [Line Items]
 
 
Total assets
221,604 
146,927 
Segment assets: |
Offshore Pipelines and Services
 
 
Segment Reporting Information [Line Items]
 
 
Total assets
400,193 
190,271 
Segment assets: |
Terminalling Services
 
 
Segment Reporting Information [Line Items]
 
 
Total assets
299,534 
291,130 
Other (1)
 
 
Segment Reporting Information [Line Items]
 
 
Total assets
334,953 
19,716 
Discontinued Operations [Member]
 
 
Segment Reporting Information [Line Items]
 
 
Total assets
$ 136,759 
$ 173,436 
Quarterly Financial Data (Unaudited) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Total revenue
$ 175,872 
$ 159,903 
$ 152,253 
$ 100,998 
$ 162,826 
$ 174,848 
$ 227,693 
$ 184,937 
$ 589,026 
$ 750,304 
$ 838,949 
Gross margin
59,396 
58,793 
59,016 
46,430 
48,176 
41,445 
44,921 
45,314 
 
 
 
Operating loss
(21,617)
(9,724)
(12,790)
(16,097)
(160,403)
(11,114)
(6,815)
(8,785)
(60,228)
(187,117)
(35,761)
Net loss from continuing operations
(8,413)
(5,488)
(12,156)
(17,772)
(159,311)
(15,607)
(11,977)
(12,523)
(43,829)
(199,418)
(55,496)
Income (loss) from discontinued operations, net of tax
(12,249)
(2,310)
2,675 
7,169 
(11,694)
(900)
1,575 
10,596 
(4,715)
(423)
(24,071)
Net income (loss) attributable to noncontrolling interests
574 
1,241 
954 
(3)
(63)
24 
22 
4 
2,766 
(13)
3,993 
Net income (loss) attributable to the Partnership
(21,236)
(9,039)
(10,435)
(10,600)
(170,939)
(16,532)
(10,425)
(1,932)
(51,310)
(199,828)
(83,560)
General Partner's Interest in net income (loss)
2 
(31)
(107)
(97)
(1,621)
(104)
(66)
(32)
 
 
 
Limited Partners' Interest in net income (loss)
(21,238)
(9,008)
(10,328)
(10,503)
(169,319)
(16,428)
(10,358)
(1,900)
 
 
 
Loss from continuing operations (in dollars per share)
$ (0.33)
$ (0.29)
$ (0.40)
$ (0.49)
$ (3.58)
$ (0.51)
$ (0.41)
$ (0.41)
 
 
 
Income (loss) from discontinued operations, basic and diluted (in usd per share)
$ (0.27)
$ (0.05)
$ 0.07 
$ 0.16 
$ (0.27)
$ (0.02)
$ 0.03 
$ 0.25 
$ (0.09)
$ (0.01)
$ (0.52)
Limited partners’ net income (loss) per unit (basic and diluted) (in dollars per share)
$ (0.60)
$ (0.34)
$ (0.33)
$ (0.33)
$ (3.85)
$ (0.53)
$ (0.38)
$ (0.16)
$ (1.60)
$ (4.92)
$ (3.29)
Loss on impairment of goodwill
$ 2,700 
 
 
 
$ 148,500 
 
 
 
$ 2,654 
$ 148,488 
$ 0 
Subsequent Event (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended 0 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Mar. 1, 2017
Subsequent Event
mi
bbl
Jan. 26, 2017
Subsequent Event
Sep. 1, 2017
Subsequent Event
Propane Marketing Services
Subsequent Event [Line Items]
 
 
 
 
 
 
Distribution declared per common unit (in dollars per share)
$ 3.01 
$ 3.17 
$ 1.85 
 
$ 0.4125 
 
Distribution made to limited partner (in dollars per share)
 
 
 
 
$ 1.65 
 
Length of pipeline
 
 
 
1,172 
 
 
Throughput capacity per day
 
 
 
40,000 
 
 
Cash proceeds from divestiture of business
 
 
 
 
 
$ 170.0