Document And Entity Information - USD ($)	12 Months Ended
Document And Entity Information - USD ($)	Jun. 30, 2017	Aug. 15, 2017	Dec. 31, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	CACI INTERNATIONAL INC /DE/
Entity Central Index Key	0000016058
Trading Symbol	caci
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Current Fiscal Year End Date	--06-30
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Entity Common Stock, Shares Outstanding		24,461,695
Entity Public Float			$ 2,983,255,314
Document Type	10-K
Document Period End Date	Jun. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenue	$ 4,354,617	$ 3,744,053	$ 3,313,452
Costs of revenue:
Direct costs	2,934,804	2,487,633	2,193,585
Indirect costs and selling expenses	1,050,792	926,918	817,403
Depreciation and amortization	71,760	64,752	66,083
Total costs of revenue	4,057,356	3,479,303	3,077,071
Income from operations	297,261	264,750	236,381
Interest expense and other, net	48,642	41,138	34,758
Income before income taxes	248,619	223,612	201,623
Income taxes	84,948	80,813	75,327
Net income	163,671	142,799	126,296
Noncontrolling interest			(101)
Net income attributable to CACI	$ 163,671	$ 142,799	$ 126,195
Basic earnings per share	$ 6.71	$ 5.89	$ 5.27
Diluted earnings per share	$ 6.53	$ 5.76	$ 5.17
Weighted-average basic shares outstanding	24,401	24,262	23,948
Weighted-average diluted shares outstanding	25,069	24,802	24,388

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 163,671	$ 142,799	$ 126,296
Other comprehensive income (loss):
Foreign currency translation adjustment	(2,804)	(19,961)	(11,943)
Effects of post-retirement adjustments, net of tax	184	(170)	(237)
Change in fair value of interest rate swap agreements, net of tax	14,587	(5,992)	(2,398)
Other comprehensive income (loss), net of tax	11,967	(26,123)	(14,578)
Comprehensive income	175,638	116,676	111,718
Noncontrolling interest			(101)
Comprehensive income attributable to CACI	$ 175,638	$ 116,676	$ 111,617

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Current assets:
Cash and cash equivalents	$ 65,539	$ 49,082
Accounts receivable, net	757,341	803,817
Prepaid expenses and other current assets	57,022	68,939
Total current assets	879,902	921,838
Goodwill	2,577,435	2,585,343
Intangible assets, net	235,371	275,372
Property and equipment, net	91,749	81,362
Supplemental retirement savings plan assets	91,367	89,937
Accounts receivable, long-term	7,886	8,330
Other long-term assets	27,372	25,159
Total assets	3,911,082	3,987,341
Current liabilities:
Current portion of long-term debt	53,965	53,965
Accounts payable	62,874	95,270
Accrued compensation and benefits	239,741	228,362
Other accrued expenses and current liabilities	170,164	187,579
Total current liabilities	526,744	565,176
Long-term debt, net of current portion	1,177,598	1,402,079
Supplemental retirement savings plan obligations, net of current portion	81,823	76,995
Deferred income taxes	273,320	248,458
Other long-term liabilities	57,876	87,320
Total liabilities	2,117,361	2,380,028
Commitments and contingencies
Shareholders’ equity:
Preferred stock $0.10 par value, 10,000 shares authorized, no shares issued or outstanding
Common stock $0.10 par value, 80,000 shares authorized; 41,896 issued and 24,462 outstanding at June 30, 2017 and 41,758 issued and 24,323 outstanding at June 30, 2016	4,190	4,176
Additional paid-in capital	569,080	558,324
Retained earnings	1,825,619	1,661,948
Accumulated other comprehensive loss	(29,116)	(41,083)
Treasury stock, at cost (17,435 and 17,435 shares, respectively)	(576,187)	(576,187)
Total CACI shareholders’ equity	1,793,586	1,607,178
Noncontrolling interest	135	135
Total shareholders’ equity	1,793,721	1,607,313
Total liabilities and shareholders’ equity	$ 3,911,082	$ 3,987,341

CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares	Jun. 30, 2017	Jun. 30, 2016
Statement Of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	41,896,000	41,758,000
Common stock, shares outstanding	24,462,000	24,323,000
Treasury stock, shares at cost	17,435,000	17,435,000

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 163,671	$ 142,799	$ 126,296
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	71,760	64,752	66,083
Amortization of deferred financing costs	4,484	3,234	2,639
Loss on extinguishment of debt			272
Loss on disposal of assets	1,025
Stock-based compensation expense	21,945	17,919	14,072
Deferred income tax expense	15,148	13,568	27,022
Equity in earnings of unconsolidated ventures	(167)	(204)	(874)
Gain on sale of assets	(1,545)
Changes in operating assets and liabilities, net of effect of business acquisitions:
Accounts receivable, net	46,158	(105)	18,889
Prepaid expenses and other assets	(5,221)	(8,408)	(2,057)
Accounts payable and other accrued expenses	(46,825)	2,427	(21,484)
Accrued compensation and benefits	12,048	4,320	2,776
Income taxes payable and receivable	(9,954)	14,868	17
Deferred rent	(952)	(9,631)	(4,323)
Supplemental retirement savings plan obligations and other long-term liabilities	9,675	(2,962)	(2,466)
Net cash provided by operating activities	281,250	242,577	226,862
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(43,268)	(20,835)	(17,444)
Cash paid for business acquisitions, net of cash acquired	(7,276)	(587,821)	(14,972)
Proceeds from net working capital and other refunds of acquired business	19,287
Proceeds from equity method investments	4,681		391
Other	1,772	1,069	629
Net cash used in investing activities	(24,804)	(607,587)	(31,396)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from borrowings under bank credit facilities, net of financing costs	485,500	1,058,500	438,969
Principal payments made under bank credit facilities	(714,465)	(659,965)	(650,141)
Payment of financing costs under bank credit facilities		(9,290)	(2,279)
Proceeds from employee stock purchase plans	4,316	3,086	3,287
Proceeds from exercise of stock options			691
Repurchases of common stock	(4,386)	(3,230)	(3,400)
Payment of taxes for equity transactions	(10,951)	(8,045)	(7,378)
Other		451	(2,257)
Net cash (used in) provided by financing activities	(239,986)	381,507	(222,508)
Effect of exchange rate changes on cash and cash equivalents	(3)	(2,779)	(2,055)
Net increase (decrease) in cash and cash equivalents	16,457	13,718	(29,097)
Cash and cash equivalents, beginning of year	49,082	35,364	64,461
Cash and cash equivalents, end of year	65,539	49,082	35,364
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid during the period for income taxes, net of refunds	79,268	54,970	45,068
Cash paid during the period for interest	45,015	37,429	33,491
Non-cash financing and investing activities:
Accrued capital expenditures	$ 667	$ 2,170	$ 1,349

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total CACI Shareholders' Equity	Noncontrolling Interest
Beginning balance at Jun. 30, 2014	$ 1,359,166	$ 4,144	$ 537,334	$ 1,392,954	$ (382)	$ (577,167)	$ 1,356,883	$ 2,283
Beginning balance, shares at Jun. 30, 2014		41,441				17,941
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to CACI	126,195			126,195			126,195
Noncontrolling interest	101							101
Stock-based compensation expense	14,072		14,072				14,072
Exercise of stock options and vesting of restricted stock units	(2,844)	$ 18	(2,862)				(2,844)
Exercise of stock options and vesting of restricted stock units (in shares)		181
Lapse of statute of limitations for uncertain tax position	438		438				438
Change in fair value of interest rate swap agreements, net	(2,398)				(2,398)		(2,398)
Currency translation adjustment	(11,943)				(11,943)		(11,943)
Repurchases of common stock	(3,400)		(158)			$ (3,242)	(3,400)
Repurchases of common stock (in shares)						44
Treasury stock issued upon settlement of warrants	(9)		(973)			$ 964	(9)
Treasury stock issued upon settlement of warrants (in shares)						(498)
Treasury stock issued under stock purchase plans	3,380		128			$ 3,252	3,380
Treasury stock issued under stock purchase plans (in shares)						(49)
Post-retirement benefit costs	(237)				(237)		(237)
Distributions to noncontrolling interest	(2,249)							(2,249)
Ending balance at Jun. 30, 2015	1,480,272	$ 4,162	547,979	1,519,149	(14,960)	$ (576,193)	1,480,137	135
Ending balance, shares at Jun. 30, 2015		41,622				17,438
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to CACI	142,799			142,799			142,799
Stock-based compensation expense	17,919		17,919				17,919
Exercise of stock options and vesting of restricted stock units	(7,451)	$ 14	(7,465)				(7,451)
Exercise of stock options and vesting of restricted stock units (in shares)		136
Change in fair value of interest rate swap agreements, net	(5,992)				(5,992)		(5,992)
Currency translation adjustment	(19,961)				(19,961)		(19,961)
Repurchases of common stock	(3,230)		(192)			$ (3,038)	(3,230)
Repurchases of common stock (in shares)						37
Treasury stock issued under stock purchase plans	3,127		83			$ 3,044	3,127
Treasury stock issued under stock purchase plans (in shares)						(40)
Post-retirement benefit costs	(170)				(170)		(170)
Ending balance at Jun. 30, 2016	1,607,313	$ 4,176	558,324	1,661,948	(41,083)	$ (576,187)	1,607,178	135
Ending balance, shares at Jun. 30, 2016		41,758				17,435
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to CACI	163,671			163,671			163,671
Stock-based compensation expense	21,945		21,945				21,945
Vesting of restricted stock units	(10,943)	$ 14	(10,957)				(10,943)
Vesting of restricted stock units (in shares)		138
Change in fair value of interest rate swap agreements, net	14,587				14,587		14,587
Currency translation adjustment	(2,804)				(2,804)		(2,804)
Repurchases of common stock	(4,386)		(236)			$ (4,150)	(4,386)
Repurchases of common stock (in shares)						41
Treasury stock issued under stock purchase plans	4,154		4			$ 4,150	4,154
Treasury stock issued under stock purchase plans (in shares)						(41)
Post-retirement benefit costs	184				184		184
Ending balance at Jun. 30, 2017	$ 1,793,721	$ 4,190	$ 569,080	$ 1,825,619	$ (29,116)	$ (576,187)	$ 1,793,586	$ 135
Ending balance, shares at Jun. 30, 2017		41,896				17,435

ORGANIZATION AND BASIS OF PRESENTATION	12 Months Ended
ORGANIZATION AND BASIS OF PRESENTATION	Jun. 30, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
ORGANIZATION AND BASIS OF PRESENTATION	NOTE 1. ORGANIZATION AND BASIS OF PRESENTATION Business Activities CACI International Inc, along with its wholly-owned subsidiaries and joint ventures that are majority owned or otherwise controlled by it (collectively, the Company), is an international information solutions and services provider to its customers, primarily the U.S. government. Other customers include state and local governments, commercial enterprises and agencies of foreign governments. The Company’s operations are subject to certain risks and uncertainties including, among others, the dependence on contracts with federal government agencies, dependence on revenue derived from contracts awarded through competitive bidding, existence of contracts with fixed pricing, dependence on subcontractors to fulfill contractual obligations, dependence on key management personnel, ability to attract and retain qualified employees, ability to successfully integrate acquired companies, and current and potential competitors with greater resources. Basis of Presentation The accompanying consolidated financial statements of the Company have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) and include the assets, liabilities, results of operations and cash flows for the Company, including its subsidiaries and ventures that are majority-owned or otherwise controlled by the Company. All intercompany balances and transactions have been eliminated in consolidation.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Jun. 30, 2017
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Revenue Recognition Revenue is recognized when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the fee is fixed or determinable, and collectability is reasonably assured. The Company generates almost all of its revenue from three different types of contractual arrangements: cost-plus-fee, time-and-materials, and fixed price contracts. Revenue on cost-plus-fixed fee contracts is recognized in an amount equal to allowable costs incurred plus the proportionate amount of the applicable fee earned. For cost-plus-fee contracts with either award or incentive fee amounts, which are accounted for within the scope of ASC 605-10-S99, the Company recognizes revenue in an amount equal to the allowable costs incurred plus the variable portion of the fee upon customer notification of the fee amount earned. Revenue on time-and-materials contracts is recognized in an amount equal to direct labor hours expended multiplied by the contractual billable rate per hour plus the costs of material and other direct costs incurred on behalf of the customer. Revenue on fixed price contracts within the scope of ASC 605-35 is recognized using the percentage-of-completion (POC) method. For these arrangements, substantially all revenue is recognized using a cost-to-cost input method based on the ratio of contractual costs incurred to date in proportion to total estimated costs at completion. When estimates of total costs to be incurred on a contract exceed estimates of total revenue to be earned, a provision for the entire loss on the contract is recorded in the period in which the loss is determined. For fixed price service and maintenance type contracts within the scope of ASC 605-10-S99, revenue is generally recognized over the period in which services are performed. The Company uses straight-line revenue recognition when value is being transferred evenly throughout the performance period or when there is not a clearly defined pattern of service. An efforts-expended method, primarily using labor hours, may be used in a proportional performance calculation when it more closely approximates the transfer of value to the customer. Revenue on fixed unit price contracts is recognized in an amount equal to units delivered multiplied by the specified price per unit. Revenue on manufactured products is recognized upon passage of title to the customer. Revenue on fixed price/level of effort contracts is similar to time-and-materials arrangements and is recognized based upon the direct labor hours expended multiplied by the contractual billable rate per hour plus the costs of material and other direct costs incurred on behalf of the customer. Contract accounting requires judgment relative to assessing risks, estimating contract revenue and costs, and making assumptions for schedule and technical issues. Due to the size and nature of many of the Company’s contracts, the estimation of total revenue and cost at completion is complicated and subject to many variables. Contract costs include material, labor, subcontracting costs, and other direct costs, as well as an allocation of allowable indirect costs. Assumptions have to be made regarding the length of time to complete the contract because costs also include expected increases in wages and prices for materials. For contract change orders, claims or similar items, the Company applies judgment in estimating the amounts and assessing the potential for realization. These amounts are only included in contract value when they can be reliably estimated and realization is considered probable. Incentives or penalties related to performance on contracts are considered in estimating sales and profit rates, and are recorded when there is sufficient information for the Company to assess anticipated performance. Estimates of award fees for certain contracts are also a factor in estimating revenue and profit rates based on actual and anticipated awards. From time to time, the Company may proceed with work based on customer direction prior to the completion and signing of formal contract documents. The Company has a formal review process for approving any such work. Revenue associated with such work is recognized only when it can be reliably estimated and realization is probable. The Company bases its estimates on previous experiences with the customer, communications with the customer regarding funding status, and its knowledge of available funding for the contract or program. The Company’s U.S. government contracts comprise 93.9 and 93.5 percent of total revenue in the year ended June 30, 2017 and 2016, respectively and are subject to subsequent government audit of direct and indirect costs. Incurred cost audits have been completed through June 30, 2009. Management does not anticipate any material adjustment to the consolidated financial statements in subsequent periods for audits not yet started or completed. Costs of Revenue Costs of revenue include all direct contract costs including subcontractor costs, as well as indirect overhead costs and selling, general and administrative expenses that are allowable and allocable to contracts under federal procurement standards. Costs of revenue also include costs and expenses that are unallowable under applicable procurement standards, and are not allocable to contracts for billing purposes. Such costs and expenses do not directly generate revenue, but are necessary for business operations. Cash and Cash Equivalents The Company considers all investments with an original maturity of three months or fewer on their trade date to be cash equivalents. The Company classifies investments with an original maturity of more than three months but fewer than twelve months on their trade date as short-term marketable securities. Receivables and Allowance for Doubtful Accounts Receivables are recorded at amounts earned less an allowance for doubtful accounts. The company periodically reassesses the adequacy of its allowance for doubtful accounts by analyzing reasonably available information as of the balance sheet date, including the length of time that the receivable has been outstanding, historical bad debts and aging trends, and other general and contract specific factors. Upon determination that a specific receivable is uncollectible, the receivable is written off against the allowance for doubtful accounts reserve. Inventories Inventories are stated at the lower of cost or market. A provision for damaged, deteriorated, or obsolete inventory is recorded based on historical usage patterns and forecasted sale. Inventories are included within prepaid expenses and other current assets on the accompanying consolidated balance sheets. Accounting for Business Combinations and Goodwill The purchase price of an acquired business is allocated to the tangible assets and separately identifiable intangible assets acquired less liabilities assumed based upon their respective fair values, with the excess recorded as goodwill. The Company evaluates goodwill at least annually for impairment, or whenever events or circumstances indicate that the carrying value may not be recoverable. The evaluation includes comparing the fair value of the relevant reporting unit to the carrying value, including goodwill, of such unit. The level at which the Company tests goodwill for impairment requires management to determine whether the operations below the operating segments constitute a self-sustaining business for which discrete financial information is available and segment management regularly reviews the operating results. If the fair value exceeds the carrying value, no impairment loss is recognized. However, if the carrying value of the reporting unit exceeds its fair value, the goodwill of the reporting unit may be impaired. Impairment is measured by comparing the implied fair value of the goodwill to its carrying value. Separately identifiable intangible assets with estimable useful lives are amortized over their respective estimated useful lives to their estimated residual values, and reviewed for impairment if impairment indicators are present. As part of the annual assessment, the Company estimates the fair value of its reporting units using both an income approach and a market approach. The valuation process considers management’s estimates of the future operating performance of each reporting unit. Companies in similar industries are researched and analyzed and management considers the domestic and international economic and financial market conditions, both in general and specific to the industry in which the Company operates, prevailing as of the valuation date. The income approach utilizes discounted cash flows. The Company calculates a weighted average cost of capital for each reporting unit in order to estimate the discounted cash flows. The Company evaluates goodwill as of the first day of the fourth quarter. In addition, the Company will perform interim impairment testing should circumstances requiring it arise. The Company completed its annual goodwill assessment as of April 1, 2017 and no impairment charge was necessary as a result of this assessment. Long-Lived Assets (Excluding Goodwill) Long-lived assets such as property and equipment and intangible assets subject to amortization are reviewed for impairment whenever events or circumstances indicate that the carrying amount of an asset may not be fully recoverable. An impairment loss would be recognized if the sum of the long-term undiscounted cash flows is less than the carrying amount of the long-lived asset being evaluated. Any write-downs are treated as permanent reductions in the carrying amount of the assets. Property and equipment is recorded at cost. Depreciation of equipment and furniture has been provided over the estimated useful life of the respective assets (ranging from three to eight years) using the straight-line method. Leasehold improvements are generally amortized using the straight-line method over the remaining lease term or the useful life of the improvements, whichever is shorter. Repairs and maintenance costs are expensed as incurred. Separately identifiable definite-lived intangible assets are amortized over their respective estimated useful lives. External Software Development Costs Costs incurred in creating a software product to be sold or licensed for external use are charged to expense when incurred as indirect costs and selling expenses until technological feasibility has been established for the software. Technological feasibility is established upon completion of a detailed program design or, in its absence, completion of a working software version. Thereafter, all such software development costs are capitalized and subsequently reported at the lower of unamortized cost or estimated net realizable value. Capitalized costs are amortized on a straight-line basis over the remaining estimated economic life of the product. Supplemental Retirement Savings Plan The Company maintains the CACI International Inc Group Executive Retirement Plan (the Supplemental Savings Plan) and maintains the underlying assets in a Rabbi Trust. The Supplemental Savings Plan is a non-qualified defined contribution supplemental retirement savings plan for certain key employees whereby participants may elect to defer and contribute a portion of their compensation, as permitted by the plan. Each participant directs his or her investments in the Supplemental Savings Plan (see Note 20). A Rabbi Trust is a grantor trust established to fund compensation for a select group of management. The assets of this trust are available to satisfy the claims of general creditors in the event of bankruptcy of the Company. The assets held by the Rabbi Trust are invested in corporate owned life insurance (COLI) products. The COLI products are recorded at cash surrender value in the consolidated financial statements as supplemental retirement savings plan assets. The amounts due to participants are based on contributions, participant investment elections, and other participant activity and are recorded as supplemental retirement savings plan obligations. Income Taxes Income taxes are accounted for using the asset and liability method whereby deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the consolidated financial statement carrying amounts of assets and liabilities, and their respective tax bases, and operating loss and tax credit carry forwards. The Company accounts for tax contingencies in accordance with ASC 740-10-25, Income Taxes – Recognition. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities due to a change in tax rates is recognized in income in the period that includes the enactment date. Estimates of the realizability of deferred tax assets are based on the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies. Any interest or penalties incurred in connection with income taxes are recorded as part of income tax expense for financial reporting purposes. Costs of Acquisitions Costs associated with legal, financial and other professional advisors related to acquisitions, whether successful or unsuccessful, are expensed as incurred. Foreign Currency Translation The assets and liabilities of the Company’s foreign subsidiaries whose functional currency is other than the U.S. dollar are translated at the exchange rate in effect on the reporting date, and income and expenses are translated at the weighted-average exchange rate during the period. The Company’s primary practice is to negotiate contracts in the same currency in which the predominant expenses are incurred, thereby mitigating the exposure to foreign currency fluctuations. The net translation gains and losses are not included in determining net income, but are accumulated as a separate component of shareholders’ equity. Foreign currency transaction gains and losses are included in determining net income, but are insignificant. These costs are included as indirect costs and selling expenses in the accompanying consolidated statements of operations. Earnings Per Share Basic earnings per share excludes dilution and is computed by dividing income by the weighted average number of common shares outstanding for the period. Diluted earnings per share reflects potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock but not securities that are anti-dilutive, including stock options and stock settled stock appreciation rights (SSARs) with an exercise price greater than the average market price of the Company’s common stock. Using the treasury stock method, diluted earnings per share includes the incremental effect of SSARs, stock options, restricted shares, and those restricted stock unit (RSUs) that are no longer subject to a market or performance condition. Information about the weighted-average number of basic and diluted shares is presented in Note 23. Fair Value of Financial Instruments The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable and amounts included in other current assets and current liabilities that meet the definition of a financial instrument approximate fair value because of the short-term nature of these amounts. The fair value of the Company’s debt under its bank credit facility approximates its carrying value at June 30, 2017. The fair value of the Company’s debt under its bank credit facility was estimated using Level 2 inputs based on market data on companies with a corporate rating similar to CACI’s that have recently priced credit facilities. Concentrations of Credit Risk Financial instruments that potentially subject the Company to credit risk include accounts receivable and cash equivalents. Management believes that credit risk related to the Company’s accounts receivable is limited due to a large number of customers in differing segments and agencies of the U.S. government. Accounts receivable credit risk is also limited due to the credit worthiness of the U.S. government. Management believes the credit risk associated with the Company’s cash equivalents is limited due to the credit worthiness of the obligors of the investments underlying the cash equivalents. In addition, although the Company maintains cash balances at financial institutions that exceed federally insured limits, these balances are placed with high quality financial institutions. Comprehensive Income (Loss) Comprehensive income is the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. Other comprehensive income (loss) refers to revenue, expenses, and gains and losses that under U.S. GAAP are included in comprehensive income, but excluded from the determination of net income. The elements within other comprehensive income consist of foreign currency translation adjustments; the changes in the fair value of interest rate swap agreements, net of tax of $9.5 million, $3.9 million and $1.6 million for the years ended June 30, 2017, 2016 and 2015, respectively; and differences between actual amounts and estimates based on actuarial assumptions and the effect of changes in actuarial assumptions made under the Company’s post-retirement benefit plans, net of tax (see Note 15). As of June 30, 2017 and 2016, accumulated other comprehensive loss included a loss of $29.5 million and $26.7 million, respectively, related to foreign currency translation adjustments, a gain of $1.5 million and a loss of $13.1 million, respectively, related to the fair value of its interest rate swap agreements, and a loss of $1.1 million and $1.3 million, respectively, related to unrecognized post-retirement costs. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported periods. Management estimates include estimated costs to complete and estimated award fees for contracts accounted for under ASC 605-35, amortization periods for long-lived intangible assets, recoverability of long-lived assets, reserves for accounts receivable, and reserves for contract related matters. Actual results could differ from these estimates. Commitments and Contingencies The Company is involved in various lawsuits, claims, and administrative proceedings arising in the normal course of business. Management is of the opinion that any liability or loss associated with such matters, either individually or in the aggregate, will not have a material adverse effect on the Company’s operations and liquidity. Liabilities for loss contingencies arising from claims, assessments, litigation, fines and penalties and other sources are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated.

RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS	12 Months Ended
RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS	Jun. 30, 2017
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS	NOTE 3. RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS In January 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-01, Clarifying the Definition of a Business, which revises the definition of a business and provides guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The guidance is effective for the fiscal year, and interim periods within that fiscal year, beginning after December 15, 2017. The adoption of this standard is not expected to have a material impact on the Company’s consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases, which amends the existing guidance on accounting for leases. The new standard requires lessees to put virtually all leases on the balance sheet by recognizing lease assets and lease liabilities. Lessor accounting is largely unchanged from that applied under previous guidance. The amended guidance is effective for the fiscal year, and interim periods within that fiscal year, beginning after December 15, 2018, and requires a modified retrospective approach. Early adoption is permitted. The Company is currently evaluating the impact of the adoption of this standard on its consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, as amended (ASC 606) (the standard), which supersedes nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five-step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing U.S. GAAP. On July 9, 2015, the FASB approved a one-year deferral of the effective date of ASU 2014-09 to annual reporting periods, including interim reporting periods within those periods, beginning after December 15, 2017, using either a full retrospective approach or a modified approach. The Company plans to adopt the standard on July 1, 2018 and apply it on a modified retrospective basis, whereby the cumulative effect of applying the standard will be recognized through shareholders’ equity on the date of adoption. We are in the process of identifying the changes to accounting policies, business processes, systems, disclosures, and controls to support the adoption of the new standard. We expect the standard will impact the pattern of revenue recognition for some of our contracts with customers. For our award and incentive fee contracts, we will recognize a constrained amount of variable consideration over time as the performance obligation is satisfied rather than defer recognition of the relevant portion of fee until customer notification of the amount earned. Some of our fixed price contracts in which revenue is recognized on a straight-line basis over the performance period will be converted to recognition of revenue over time by measuring the progress toward complete satisfaction of the performance obligation using input methods, including cost and labor hours. We do not anticipate a material impact to our cost-plus-fixed fee, fixed price/level-of-effort, time-and-materials, or fixed price contracts that currently use percentage-of-completion accounting. The cumulative catch-up adjustment that will be recorded through shareholders’ equity on July 1, 2018 is still being quantified. We will continue evaluating the impact of the standard on our contract portfolio through the date of adoption.

ACQUISITIONS

12 Months Ended

Jun. 30, 2017

Business Combinations [Abstract]

ACQUISITIONS

NOTE 4. ACQUISITIONS

Year Ended June 30, 2017

On October 1, 2016, CACI Limited acquired a business in the United Kingdom that provides outsourced database managed services and associated database segmentation and analytics for large corporate customers. The purchase consideration for this business was approximately $2.8 million, which includes initial cash payments, deferred consideration and contingent consideration to be paid upon achieving certain metrics.

Year Ended June 30, 2016

On February 1, 2016, the Company acquired 100 percent of the outstanding shares of L-3 National Security Solutions, Inc. and L-3 Data Tactics Corporation (together, “NSS”). NSS is a prime mission partner to the U.S. Department of Defense (DoD), U.S. government intelligence agencies, and U.S. federal civilian agencies. The acquisition was integrated into the domestic operating segment and will expand CACI’s opportunities in many of our key market areas and expand our current customer base. CACI financed the acquisition by borrowing $250.0 million under its existing revolving facility and by entering into an eighth amendment and first incremental facility amendment to its credit facility to allow for the incurrence of $300.0 million in additional term loans.

The initial purchase consideration paid at closing to acquire NSS was $550.0 million plus $11.2 million representing a preliminary net working capital adjustment. Subsequent to closing, CACI received a refund of $13.6 million for the final net working capital adjustment and an additional $5.7 million refund for tax-related adjustments.

The total consideration of $541.9 million was allocated among assets acquired and liabilities assumed at fair value, with the excess purchase consideration recorded as goodwill as follows (in thousands):

Cash and cash equivalents	$	2,596
Accounts receivable		210,459
Prepaid expenses and other current assets		14,461
Property and equipment		21,320
Intangible assets, other than goodwill		110,500
Goodwill		360,230
Other long-term assets		437
Accounts payable		(57,616	)
Accrued compensation and benefits		(38,953	)
Accrued expenses and other current liabilities		(38,432	)
Deferred income taxes		(37,796	)
Other long-term liabilities		(5,343	)
Total consideration	$	541,863

The goodwill of $360.2 million is largely attributable to the assembled workforce of NSS and expected synergies between the Company and NSS. The estimated fair value attributed to intangible assets, which consists of customer contracts and related customer relationships, is being amortized on an accelerated basis over approximately 15 years. The fair value attributed to the intangible assets acquired was based on estimates, assumptions, and other information compiled by management, including independent valuations that utilized established valuation techniques. Of the value attributed to goodwill and intangible assets, $47.7 million is deductible for income tax purposes.

From the February 1, 2016 acquisition date through June 30, 2016, NSS generated $427.2 million of revenue and $18.8 million of net income. NSS’ net income includes the impact of $4.2 million of amortization of customer contracts and customer relationships. NSS’ net income does not include the impact of acquisition-related expenses incurred by CACI.

CACI incurred $7.3 million of acquisition-related expenses during the year ended June 30, 2016, which are included in indirect costs and selling expenses. Additionally, CACI incurred $3.9 million of integration and restructuring costs from the acquisition date through June 30, 2016.

The following pro forma results are prepared for comparative purposes only and do not necessarily reflect the results that would have occurred had the acquisition occurred at the beginning of the years presented or the results which may occur in the future. The following unaudited pro forma results of operations assume the NSS acquisition had occurred on July 1, 2014 (in thousands except per share amounts):

	(Unaudited)
	Year ended June 30,
	2016			2015
Revenue	$	4,418,997		$	4,401,345
Net loss		(300,363	)		(15,480	)
Basic loss per share		(12.38	)		(0.65	)
Diluted loss per share		(12.38	)		(0.65	)

Pro forma net losses shown above include NSS’ historical goodwill impairment expense of $476.2 million and $158.7 million for the year ended June 30, 2016 and 2015, respectively. Significant pro forma adjustments incorporated into the pro forma results above include the recognition of additional amortization expense related to acquired intangible assets and additional interest expense related to debt incurred to finance the acquisition. In addition, significant nonrecurring adjustments include the elimination of non-recurring acquisition-related expenses incurred during the year ended June 30, 2016.

Other Acquisitions

The Company also completed the following acquisitions during the year ended June 30, 2016:

•

On July 1, 2015, CACI Limited acquired 100 percent of the outstanding shares of Rockshore Group Ltd (Rockshore) which was integrated into the international operating segment. Rockshore uses its expertise in data aggregation, event processing, and business logic integration to provide real-time event processing and situational awareness to the telecom, aviation, and rail sectors.

•

On December 4, 2015, the Company acquired 100 percent of the outstanding shares of a business in the United States which provides security technology services and was integrated into the domestic operating segment.

•

On March 1, 2016, CACI Limited acquired 100 percent of the outstanding shares of Purple Secure Systems Limited which was integrated into the international operating segment. Purple Secure Systems Limited is a provider of agile systems and software for national security, defense and government organizations.

•

On March 1, 2016, CACI Limited acquired 100 percent of the outstanding shares of Stream:20 Limited which was integrated into the international operating segment. Stream:20 Limited provides digital marketing and digital transformation consultancy services to commercial companies working in a variety of sectors.

The combined purchase consideration for these acquisitions was $55.6 million, which includes $31.8 million of initial cash payments, $8.4 million of deferred consideration and $15.4 million estimated fair value of contingent consideration to be paid upon achieving certain metrics. The Company recognized fair values of the assets acquired and liabilities assumed and allocated $40.6 million to goodwill and $8.2 million to intangible assets. The intangible assets primarily consist of customer relationships and acquired technology.

Year Ended June 30, 2015

On April 1, 2015, CACI acquired 100 percent of the outstanding shares of LTC Engineering Associates, Inc. (LTC) for a purchase price of $16.0 million.

Headquartered in Florida, LTC employs approximately 50 associates. LTC is a highly specialized provider of technical engineering solutions and services to the intelligence and DoD communities in the areas of software engineering, cybersecurity, signals intelligence, communications intelligence, and digital signals processing. This acquisition expands our capabilities in our C4ISR, intelligence, and cyber market areas and complements our 2013 acquisition of Six3 Systems, Inc. CACI recorded $8.9 million of goodwill and $4.8 million of intangible assets related to customer relationships associated with this acquisition.

CASH AND CASH EQUIVALENTS

12 Months Ended

Jun. 30, 2017

Cash And Cash Equivalents [Abstract]

CASH AND CASH EQUIVALENTS

NOTE 5. CASH AND CASH EQUIVALENTS

Cash and cash equivalents consisted of the following (cost approximates fair value) (in thousands):

	June 30,
	2017		2016
Cash	$	65,091	$	45,117
Money market funds		448		3,965
Total cash and cash equivalents	$	65,539	$	49,082

ACCOUNTS RECEIVABLE

12 Months Ended

Jun. 30, 2017

Accounts Receivable Net [Abstract]

ACCOUNTS RECEIVABLE

NOTE 6. ACCOUNTS RECEIVABLE

Total accounts receivable, net of allowance for doubtful accounts of $3.6 million and $3.0 million at June 30, 2017 and 2016, respectively, consisted of the following (in thousands):

	June 30,
	2017		2016
Billed receivables	$	546,041	$	599,206
Billable receivables at end of period		179,350		172,585
Unbilled receivables pending receipt of contractual documents authorizing billing		31,950		32,026
Total accounts receivable, current		757,341		803,817
Unbilled receivables, retainages and fee withholdings expected to be billed beyond the next 12 months		7,886		8,330
Total accounts receivable	$	765,227	$	812,147

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References + Details

GOODWILL

12 Months Ended

Jun. 30, 2017

Goodwill [Abstract]

GOODWILL

NOTE 7. GOODWILL

The changes in the carrying amount of goodwill for the years ended June 30, 2017 and 2016 are as follows (in thousands):

	Domestic			International			Total
Balance at June 30, 2015	$	2,108,768		$	81,048		$	2,189,816
Goodwill acquired (1)		378,380			29,939			408,319
Foreign currency translation		—			(12,792	)		(12,792	)
Balance at June 30, 2016	$	2,487,148		$	98,195		$	2,585,343
Goodwill acquired (1)		(7,652	)		2,220			(5,432	)
Foreign currency translation		—			(2,476	)		(2,476	)
Balance at June 30, 2017	$	2,479,496		$	97,939		$	2,577,435

⁽¹⁾	Includes goodwill initially allocated to new business acquisitions as well as purchase accounting adjustments.

INTANGIBLE ASSETS

12 Months Ended

Jun. 30, 2017

Finite Lived Intangible Assets Net [Abstract]

INTANGIBLE ASSETS

NOTE 8. INTANGIBLE ASSETS

Intangible assets consisted of the following (in thousands):

	June 30,
	2017			2016
Intangible assets
Customer contracts and related customer relationships	$	635,895		$	635,826
Acquired technologies		28,503			28,074
Covenants not to compete		3,305			3,321
Other		1,545			1,551
Intangible assets		669,248			668,772
Less accumulated amortization
Customer contracts and related customer relationships		(402,934	)		(363,412	)
Acquired technologies		(26,542	)		(25,693	)
Covenants not to compete		(3,288	)		(3,245	)
Other		(1,113	)		(1,050	)
Accumulated amortization		(433,877	)		(393,400	)
Total intangible assets, net	$	235,371		$	275,372

Intangible assets are primarily amortized on an accelerated basis over periods ranging from one to fifteen years. The weighted-average period of amortization for customer contracts and related customer relationships as of June 30, 2017 is 14.1 years, and the weighted-average remaining period of amortization is 11.2 years. The weighted-average period of amortization for acquired technologies as of June 30, 2017 is 9.5 years, and the weighted-average remaining period of amortization is 6.1 years.

Amortization expense for the years ended June 30, 2017, 2016 and 2015 was $40.7 million, $38.0 million and $39.5 million, respectively. Expected amortization expense for each of the fiscal years through June 30, 2022 and for years thereafter is as follows (in thousands):

	Amount
Year ending June 30, 2018	$	36,271
Year ending June 30, 2019		31,602
Year ending June 30, 2020		27,130
Year ending June 30, 2021		23,932
Year ending June 30, 2022		20,640
Thereafter		95,796
Total intangible assets, net	$	235,371

PROPERTY AND EQUIPMENT

12 Months Ended

Jun. 30, 2017

Property Plant And Equipment [Abstract]

PROPERTY AND EQUIPMENT

NOTE 9. PROPERTY AND EQUIPMENT

Property and equipment consisted of the following (in thousands):

	June 30,
	2017			2016
Equipment and furniture	$	138,742		$	126,437
Leasehold improvements		94,643			92,103
Property and equipment, at cost		233,385			218,540
Less accumulated depreciation and amortization		(141,636	)		(137,178	)
Total property and equipment, net	$	91,749		$	81,362

Depreciation expense, including amortization of leasehold improvements, was $27.5 million, $23.6 million and $22.7 million for the years ended June 30, 2017, 2016 and 2015, respectively.

CAPITALIZED EXTERNAL SOFTWARE DEVELOPMENT COSTS

12 Months Ended

Jun. 30, 2017

Capitalized Computer Software Net [Abstract]

CAPITALIZED EXTERNAL SOFTWARE DEVELOPMENT COSTS

NOTE 10. CAPITALIZED EXTERNAL SOFTWARE DEVELOPMENT COSTS

A summary of changes in capitalized external software development costs, including costs capitalized and amortized during each of the years in the three-year period ended June 30, 2017, is as follows (in thousands):

	Year ended June 30,
	2017			2016			2015
Capitalized software development costs, beginning of year	$	15,432		$	15,255		$	16,594
Costs capitalized		3,003			3,407			2,572
Amortization		(4,197	)		(3,230	)		(3,911	)
Capitalized software development costs, end of year	$	14,238		$	15,432		$	15,255

Capitalized software development costs are presented within other current assets and other long-term assets in the accompanying consolidated balance sheets.

ACCRUED COMPENSATION AND BENEFITS

12 Months Ended

Jun. 30, 2017

ACCRUED COMPENSATION AND BENEFITS

NOTE 11. ACCRUED COMPENSATION AND BENEFITS

Accrued compensation and benefits consisted of the following (in thousands):

	June 30,
	2017		2016
Accrued salaries and withholdings	$	123,914	$	114,990
Accrued leave		86,612		85,717
Accrued fringe benefits		29,215		27,655
Total accrued compensation and benefits	$	239,741	$	228,362

OTHER ACCRUED EXPENSES AND CURRENT LIABILITIES

12 Months Ended

Jun. 30, 2017

Other Accrued Expenses And Current Liabilities [Abstract]

OTHER ACCRUED EXPENSES AND CURRENT LIABILITIES

NOTE 12. OTHER ACCRUED EXPENSES AND CURRENT LIABILITIES

Other accrued expenses and current liabilities consisted of the following (in thousands):

	June 30,
	2017		2016
Vendor obligations	$	110,541	$	109,671
Deferred revenue		30,277		41,407
Other		29,346		36,501
Total other accrued expenses and current liabilities	$	170,164	$	187,579

LONG TERM DEBT

12 Months Ended

Jun. 30, 2017

Long Term Debt [Abstract]

LONG TERM DEBT

NOTE 13. LONG TERM DEBT

Long-term debt consisted of the following (in thousands):

	June 30,
	2017			2016
Bank credit facility – term loans	$	978,867		$	1,032,833
Bank credit facility – revolver loans		265,000			440,000
Principal amount of long-term debt		1,243,867			1,472,833
Less unamortized debt issuance costs		(12,304	)		(16,789	)
Total long-term debt		1,231,563			1,456,044
Less current portion		(53,965	)		(53,965	)
Long-term debt, net of current portion	$	1,177,598		$	1,402,079

Bank Credit Facility

The Company has a $1,981.3 million credit facility (the Credit Facility), which consists of an $850.0 million revolving credit facility (the Revolving Facility) and a $1,131.3 million term loan (the Term Loan). The Revolving Facility has subfacilities of $100.0 million for same-day swing line loan borrowings and $25.0 million for stand-by letters of credit. At any time and so long as no default has occurred, the Company has the right to increase the Revolving Facility or the Term Loan in an aggregate principal amount of up to the greater of $400.0 million or an amount subject to 2.75 times senior secured leverage, calculated assuming the Revolving Facility is fully drawn, with applicable lender approvals. The Credit Facility is available to refinance existing indebtedness and for general corporate purposes, including working capital expenses and capital expenditures.

The Credit Facility was amended during the third quarter of FY2016 in connection with the Company’s acquisition of NSS (see Note 4). CACI financed the transaction by borrowing $250.0 million under its existing Revolving Facility and by entering into an eighth amendment and first incremental facility amendment to its Credit Facility to allow for the incurrence of $300.0 million in additional Term Loans.

The Revolving Facility is a secured facility that permits continuously renewable borrowings of up to $850.0 million. As of June 30, 2017, the Company had $265.0 million outstanding under the Revolving Facility, no borrowings on the swing line and an outstanding letter of credit of $0.4 million. The Company pays a quarterly facility fee for the unused portion of the Revolving Facility.

The Term Loan is a five-year secured facility under which principal payments are due in quarterly installments of $13.5 million through June 30, 2018 and $27.0 million thereafter until the balance is due in full on June 1, 2020. As of June 30, 2017, the Company had $978.9 million outstanding under the Term Loan.

The interest rates applicable to loans under the Credit Facility are floating interest rates that, at the Company’s option, equal a base rate or a Eurodollar rate plus, in each case, an applicable rate based upon the Company’s consolidated total leverage ratio. As of June 30, 2017, the effective interest rate, including the impact of the Company’s floating-to-fixed interest rate swap agreements and excluding the effect of amortization of debt financing costs, for the outstanding borrowings under the Credit Facility was 3.25 percent.

The Credit Facility requires the Company to comply with certain financial covenants, including a maximum senior secured leverage ratio, a maximum total leverage ratio and a minimum fixed charge coverage ratio. The Credit Facility also includes customary negative covenants restricting or limiting the Company’s ability to guarantee or incur additional indebtedness, grant liens or other security interests to third parties, make loans or investments, transfer assets, declare dividends or redeem or repurchase capital stock or make other distributions, prepay subordinated indebtedness and engage in mergers, acquisitions or other business combinations, in each case except as expressly permitted under the Credit Facility. As of June 30, 2017, the Company was in compliance with all of the financial covenants. A majority of the Company’s assets serve as collateral under the Credit Facility.

All debt issuance costs are being amortized from the date incurred to the expiration date of the Credit Facility.

Cash Flow Hedges

The Company periodically uses derivative financial instruments as part of a strategy to manage exposure to market risks associated with interest rate fluctuations. The Company has entered into several floating-to-fixed interest rate swap agreements for an aggregate notional amount of $900.0 million which hedge a portion of the Company’s floating rate indebtedness. The swaps mature at various dates through 2022. The Company has designated the swaps as cash flow hedges. Unrealized gains are recognized as assets while unrealized losses are recognized as liabilities. The interest rate swap agreements are highly correlated to the changes in interest rates to which the Company is exposed. Unrealized gains and losses on these swaps are designated as effective or ineffective. Realized gains and losses in connection with each required interest payment are reclassified from accumulated other comprehensive income or loss to interest expense. The Company does not hold or issue derivative financial instruments for trading purposes.

The effect of derivative instruments in the consolidated statements of operations and accumulated other comprehensive loss for the years ended June 30, 2017, 2016 and 2015 is as follows (in thousands):

	Interest Rate Swaps
	2017		2016			2015
Gain (loss) recognized in other comprehensive income	$	6,872	$	(14,859	)	$	(9,422	)
Amounts reclassified to earnings from accumulated other comprehensive loss	$	7,715	$	8,867		$	7,024
Net current period other comprehensive income (loss)	$	14,587	$	(5,992	)	$	(2,398	)

The aggregate maturities of long-term debt at June 30, 2017 are as follows (in thousands):

Year ending June 30,
2018	$	53,965
2019		107,930
2020		1,081,972
Principal amount of long-term debt		1,243,867
Less unamortized debt issuance costs		(12,304	)
Total long-term debt	$	1,231,563

LEASES

12 Months Ended

Jun. 30, 2017

Leases [Abstract]

LEASES

NOTE 14. LEASES

The Company conducts its operations from leased office facilities, all of which are classified as operating leases and expire over the next 13 years. Future minimum lease payments due under non-cancelable leases as of June 30, 2017, are as follows (in thousands):

Year ending June 30:
2018	$	64,115
2019		59,774
2020		45,873
2021		38,845
2022		29,545
Thereafter		75,560
Total minimum lease payments	$	313,712

The minimum lease payments above are shown net of sublease rental income of $8.7 million scheduled to be received over the next 6 years under non-cancelable sublease agreements.

Rent expense incurred under operating leases for the years ended June 30, 2017, 2016, and 2015 totaled $76.2 million, $62.8 million, and $54.6 million, respectively.

OTHER LONG-TERM LIABILITIES

12 Months Ended

Jun. 30, 2017

Other Liabilities Noncurrent [Abstract]

OTHER LONG-TERM LIABILITIES

NOTE 15. OTHER LONG-TERM LIABILITIES

Other long-term liabilities consisted of the following (in thousands):

	June 30,
	2017		2016
Deferred rent, net of current portion	$	33,284	$	32,907
Interest rate swap agreements		3,110		21,609
Deferred acquisition and contingent consideration		658		18,642
Deferred revenue		6,514		7,234
Accrued post-retirement obligations		6,423		6,569
Long-term incentive compensation		5,605		—
Reserve for unrecognized tax benefits		1,639		249
Other		643		110
Total other long-term liabilities	$	57,876	$	87,320

Deferred rent liabilities result from recording rent expense and incentives for tenant improvements on a straight-line basis over the life of the respective lease.

Accrued post-retirement obligations include projected liabilities for benefits the Company is obligated to provide under long-term care, group health, and executive life insurance plans, each of which is unfunded. Plan benefits are provided to certain current and former executives, their dependents and other eligible employees, as defined. Post-retirement obligations also include accrued benefits under supplemental retirement benefit plans covering certain executives. The expense recorded under these plans was $0.4 million during the years ended June 30, 2017 and 2016.

The Company has entered into floating-to-fixed interest rate swap agreements related to a portion of the Company’s floating rate indebtedness (see Note 13). See Note 22 for fair values of the swap agreements as of June 30, 2017 and 2016.

BUSINESS SEGMENT, CUSTOMER AND GEOGRAPHIC INFORMATION

12 Months Ended

Jun. 30, 2017

Segment Reporting [Abstract]

BUSINESS SEGMENT, CUSTOMER AND GEOGRAPHIC INFORMATION

NOTE 16. BUSINESS SEGMENT, CUSTOMER AND GEOGRAPHIC INFORMATION

Segment Information

The Company reports operating results and financial data in two segments: domestic operations and international operations. Domestic operations provide information solutions and services to its customers. Its customers are primarily U.S. federal government agencies. Other customers of the Company’s domestic operations include commercial enterprises. The Company places employees in locations around the world in support of its customers. International operations offer services to both commercial and non-U.S. government customers primarily within the Company’s business systems and enterprise IT markets. The Company evaluates the performance of its operating segments based on net income attributable to CACI. Summarized financial information concerning the Company’s reportable segments is shown in the following tables.

	Domestic Operations		International Operations		Total
	(in thousands)
Year Ended June 30, 2017
Revenue from external customers	$	4,217,488	$	137,129	$	4,354,617
Net income attributable to CACI		150,271		13,400		163,671
Net assets		1,652,736		140,985		1,793,721
Goodwill		2,479,496		97,939		2,577,435
Total long-term assets		2,912,488		118,692		3,031,180
Total assets		3,716,893		194,189		3,911,082
Capital expenditures		41,832		1,436		43,268
Depreciation and amortization		67,042		4,718		71,760

Year Ended June 30, 2016
Revenue from external customers	$	3,593,924	$	150,129	$	3,744,053
Net income attributable to CACI		129,568		13,231		142,799
Net assets		1,476,924		130,389		1,607,313
Goodwill		2,487,148		98,195		2,585,343
Total long-term assets		2,943,896		121,607		3,065,503
Total assets		3,798,013		189,328		3,987,341
Capital expenditures		18,339		2,496		20,835
Depreciation and amortization		60,637		4,115		64,752

Year Ended June 30, 2015
Revenue from external customers	$	3,168,864	$	144,588	$	3,313,452
Net income attributable to CACI		114,658		11,537		126,195
Net assets		1,343,152		137,120		1,480,272
Goodwill		2,108,768		81,048		2,189,816
Total long-term assets		2,473,470		102,450		2,575,920
Total assets		3,055,782		186,248		3,242,030
Capital expenditures		15,324		2,120		17,444
Depreciation and amortization		61,587		4,496		66,083

Interest income and interest expense are not presented above as the amounts attributable to the Company’s international operations are insignificant.

Customer Information

The Company earned 93.9 percent, 93.5 percent and 93.7 percent of its revenue from various agencies and departments of the U.S. government for the years ended June 30, 2017, 2016 and 2015, respectively. Revenue by customer sector was as follows (dollars in thousands):

	Year ended June 30,
	2017		%			2016		%			2015		%
Department of Defense	$	2,829,305		65.0	%	$	2,439,329		65.1	%	$	2,217,031		66.9	%
Federal civilian agencies		1,259,212		28.9			1,062,508		28.4			888,191		26.8
Commercial and other		266,100		6.1			242,216		6.5			208,230		6.3
Total revenue	$	4,354,617		100.0	%	$	3,744,053		100.0	%	$	3,313,452		100.0	%

INVESTMENTS IN JOINT VENTURES	12 Months Ended
INVESTMENTS IN JOINT VENTURES	Jun. 30, 2017
Equity Method Investments And Joint Ventures [Abstract]
INVESTMENTS IN JOINT VENTURES	NOTE 17. INVESTMENTS IN JOINT VENTURES AC FIRST LLC In July 2009, the Company entered into a joint venture with AECOM Government Services, Inc. (AGS), a division of AECOM Technology Corporation, called AC FIRST LLC (AC FIRST). The companies partnered in the venture to jointly pursue work under a U.S. Army contract. The Company owned 49 percent of AC FIRST and AGS owned 51 percent. The Company accounted for its interest in AC FIRST using the equity method of accounting as the Company determined it was not the primary beneficiary of AC First. In June 2016 the Company redeemed its 49 percent interest in the joint venture. In accordance with the terms of the redemption agreement the Company received 90 percent of its investment in the joint venture in July 2016. The remaining 10 percent withheld will be distributed when the contract years for which the Company was a member of the joint venture have been audited, settled, or are otherwise no longer subject to audit claims.

OTHER COMMITMENTS AND CONTINGENCIES	12 Months Ended
OTHER COMMITMENTS AND CONTINGENCIES	Jun. 30, 2017
Commitments And Contingencies Disclosure [Abstract]
OTHER COMMITMENTS AND CONTINGENCIES	NOTE 18. OTHER COMMITMENTS AND CONTINGENCIES General Legal Matters The Company is involved in various lawsuits, claims, and administrative proceedings arising in the normal course of business. Management is of the opinion that any liability or loss associated with such matters, either individually or in the aggregate, will not have a material adverse effect on the Company’s operations and liquidity. Government Contracting Payments to the Company on cost-plus-fee and time-and-materials contracts are subject to adjustment upon audit by the Defense Contract Audit Agency (DCAA) and other government agencies that do not utilize DCAA’s services. The DCAA has started audits of the Company’s incurred cost submissions for its fiscal years 2012 and 2013, and has started audits of incurred cost submission for fiscal years 2011 through 2013 associated with CACI’s acquisition of NSS. An intelligence agency is now auditing direct costs on selected contracts for fiscal years 2013 through 2015. We are still negotiating the results of prior years’ audits with the respective cognizant contracting officers and believe our reserves for such are adequate. In the opinion of management, adjustments that may result from these audits and the audits not yet started are not expected to have a material effect on the Company’s financial position, results of operations, or cash flows as the Company has accrued its best estimate of potential disallowances. Additionally, the DCAA continually reviews the cost accounting and other practices of government contractors, including the Company. In the course of those reviews, cost accounting and other issues are identified, discussed and settled. On March 26, 2012, the Company received a subpoena from the Defense Criminal Investigative Service seeking documents related to one of the Company’s contracts for the period of January 1, 2007 through March 26, 2012. The Company has provided documents responsive to the subpoena and is cooperating fully with the government’s investigation. The Company has accrued its current best estimate of the likely outcome within its estimated range of zero to $3.9 million. On April 9, 2012, the Company received a letter from the Department of Justice (DoJ) informing the Company that the DoJ is investigating whether the Company violated the civil False Claims Act by submitting false claims to receive federal funds pursuant to a GSA contract. Specifically, the DoJ is investigating whether the Company failed to comply with contract requirements and applicable regulations by improperly billing for certain contracting personnel under the contract. This case was closed without any impact to the Company.

INCOME TAXES

12 Months Ended

Jun. 30, 2017

Income Tax Disclosure [Abstract]

INCOME TAXES

NOTE 19. INCOME TAXES

The domestic and foreign components of income before provision for income taxes are as follows (in thousands):

	Year ended June 30,
	2017		2016		2015
Domestic	$	231,982	$	207,641	$	187,332
Foreign		16,637		15,971		14,190
Income before income taxes	$	248,619	$	223,612	$	201,522

The components of income tax expense are as follows (in thousands):

	Year ended June 30,
	2017			2016			2015
Current:
Federal	$	54,425		$	54,507		$	37,159
State and local		11,334			9,401			8,080
Foreign		4,041			3,337			3,066
Total current		69,800			67,245			48,305
Deferred:
Federal		13,076			11,978			23,261
State and local		2,917			2,028			3,964
Foreign		(845	)		(438	)		(203	)
Total deferred		15,148			13,568			27,022
Total income tax expense	$	84,948		$	80,813		$	75,327

Income tax expense differs from the amounts computed by applying the statutory U.S. income tax rate of 35 percent as a result of the following (in thousands):

	Year ended June 30,
	2017			2016			2015
Expected tax expense computed at federal rate	$	87,017		$	78,264		$	70,533
State and local taxes, net of federal benefit		9,263			7,429			7,828
Nonincludible and nondeductible items, net		1,087			2,936			2,166
Effect of foreign tax rates		(2,320	)		(2,308	)		(2,135	)
R&D tax credit		(4,894	)		(135	)		(77	)
Other tax credits		(1,321	)		(1,744	)		(1,261	)
ASU 2016-09 share-based compensation		(1,390	)		(1,061	)		—
Domestic manufacturing deduction and other		(2,494	)		(2,568	)		(1,727	)
Total income tax expense	$	84,948		$	80,813		$	75,327

The tax effects of temporary differences that give rise to deferred taxes are presented below (in thousands):

	June 30,
	2017			2016
Deferred tax assets:
Deferred compensation and post-retirement obligations	$	37,257		$	35,724
Reserves and accruals		40,058			39,903
Stock-based compensation		13,599			9,833
Interest rate swap		—			8,505
Deferred rent		6,091			5,765
Other		2,000			8,353
Total deferred tax assets		99,005			108,083
Deferred tax liabilities:
Goodwill and other intangible assets		(337,849	)		(320,811	)
Unbilled revenue		(20,913	)		(18,740	)
Prepaid expenses		(4,554	)		(8,308	)
Interest rate swap		(963	)		—
Other		(8,046	)		(8,682	)
Total deferred tax liabilities		(372,325	)		(356,541	)
Net deferred tax liability	$	(273,320	)	$	(248,458	)

The Company is subject to income taxes in the U.S. and various state and foreign jurisdictions. Tax statutes and regulations within each jurisdiction are subject to interpretation and require the application of significant judgment. The Company's consolidated federal income tax returns through June 30, 2013 are no longer subject to audit. The Company is currently under examination by three state jurisdictions for years 2010 through 2016. The Company does not expect the resolution of these examinations to have a material impact on its results of operations, financial condition or cash flows.

During the years ended June 30, 2017 and 2016, the Company’s income tax expense was favorably impacted by non-taxable gains on assets invested in COLI policies, tax benefits related to deductions claimed for income from domestic production activities and the adoption of the share based payment accounting standard ASU 2016-09. For the year ended June 30, 2017, income tax expense was favorably impacted by research and development tax credits relating to the 2016 and 2017 tax years. Tax benefits realized from prior year state tax credits and the reinstatement of the work opportunity tax credit reduced income tax expense for the year ended June 30, 2016.

U.S. income taxes have not been provided for undistributed earnings of foreign subsidiaries that have been permanently reinvested outside the United States. As of June 30, 2017, the estimated deferred tax liability associated with these undistributed earnings is approximately $15.7 million.

The Company’s total liability for unrecognized tax benefits as of June 30, 2017, 2016 and 2015 was approximately $1.6 million, $0.4 million and $6.2 million, respectively. Of the unrecognized tax benefits at June 30, 2017, 2016 and 2015, $1.6 million, $0.4 million and $1.3 million, respectively, if recognized, would impact the Company’s effective tax rate. A reconciliation of the beginning and ending amount of unrecognized benefits is shown in the table below (in thousands):

	Year ended June 30,
	2017			2016			2015
Beginning of year	$	398		$	6,220		$	9,636
Additions based on current year tax positions		1,475			89			1,468
Reductions based on changes to prior year tax positions		—			—			(3,522	)
Lapse of statute of limitations		(234	)		(128	)		(1,344	)
Settlement with taxing authorities		—			(5,783	)		(18	)
End of year	$	1,639		$	398		$	6,220

The Company recognizes net interest and penalties as a component of income tax expense. Over the next 12 months, the Company does not expect a significant increase or decrease in the unrecognized tax benefits recorded at June 30, 2017. As of June 30, 2017, the entire balance of unrecognized tax benefits is included in other long-term liabilities.

RETIREMENT SAVINGS PLANS	12 Months Ended
RETIREMENT SAVINGS PLANS	Jun. 30, 2017
Compensation And Retirement Disclosure [Abstract]
RETIREMENT SAVINGS PLANS	NOTE 20. RETIREMENT SAVINGS PLANS 401(k) Plan The Company maintains a defined contribution plan under Section 401(k) of the Internal Revenue Code, the CACI $MART Plan (the 401(k) Plan). Employees can contribute up to 75 percent (subject to certain statutory limitations) of their total cash compensation. The Company provides matching contributions equal to 50 percent of the amount of salary deferral employees elect, up to 6 percent of each employee’s total calendar year cash compensation, as defined. The Company may also make discretionary profit sharing contributions to the 401(k) Plan. Employee contributions vest immediately. Employer contributions vest in full after three years of employment. Total 401(k) Plan Company contribution expense for the years ended June 30, 2017, 2016, and 2015 were $24.0 million, $25.5 million, and $22.5 million, respectively. The Company maintains several qualified 401(k) profit-sharing plans (PSP) that cover eligible employees. Employees are eligible to participate in the PSP beginning on the first of the month following the start of employment and attainment of age 18. Under the PSP, the Company may make discretionary contributions based on a percentage of the total compensation of all eligible participants. Company contribution expense for the year ended June 30, 2017, 2016 and 2015 was $22.8 million, $20.6 million and $18.0 million, respectively. International Operations Defined Contribution Plans The Company maintains defined contribution pension plans in the U.K. and in the Netherlands. In the U.K., employees can elect the amount of pension contributions that they wish to make subject to certain U.K. tax limits. Under the Dutch plan, the amounts the Company contributes are based on the employee’s age. In both countries, the contributions are deemed to be company contributions and vest immediately. Contributions to these plans and their predecessor plans for the years ended June 30, 2017, 2016, and 2015 were $1.5 million, $1.4 million, and $1.1 million, respectively. Supplemental Savings Plan The Company maintains the Supplemental Savings Plan through which, on a calendar year basis, officers at the director level and above can elect to defer for contribution to the Supplemental Savings Plan up to 50 percent of their base compensation and up to 100 percent of their bonuses. The Company provides a contribution of 5 percent of compensation for each participant’s compensation that exceeds the limit as set forth in IRC 401(a)(17) (currently $270,000 per year). The Company also has the option to make annual discretionary contributions. Company contributions vest after 5-years of contributions, and vesting is accelerated in the event of a change of control of the Company. Participant deferrals and Company contributions will be credited with the rate of return based on the investment options and asset allocations selected by the Participant. Participants may change their asset allocation as often as daily, if they so choose. A Rabbi Trust has been established to hold and provide a measure of security for the investments that finance benefit payments. Distributions from the Supplemental Savings Plan are made upon retirement, termination, death, or total disability. The Supplemental Savings Plan also allows for in-service distributions. Supplemental Savings Plan obligations due to participants totaled $87.9 million at June 30, 2017, of which $6.1 million is included in accrued compensation and benefits in the accompanying consolidated balance sheet. Supplemental Savings Plan obligations increased by $4.0 million during the year ended June 30, 2017, consisting of $4.8 million of investment gains, $8.7 million of participant compensation deferrals, and $0.6 million of Company contributions, offset by $10.1 million of distributions. The Company maintains COLI assets in a Rabbi Trust to offset the obligations under the Supplemental Savings Plan. The value of the COLI in the Rabbi Trust was $91.4 million at June 30, 2017 and COLI gains were $4.6 million for the year ended June 30, 2017. The value of the COLI in the Rabbi Trust was $88.8 million at June 30, 2016 and COLI gains were $1.8 million for the year ended June 30, 2016. Contribution expense for the Supplemental Savings Plan during the years ended June 30, 2017, 2016, and 2015, was $0.7 million, $0.5 million, and $0.5 million, respectively.

STOCK PLANS AND STOCK-BASED COMPENSATION

12 Months Ended

Jun. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

STOCK PLANS AND STOCK-BASED COMPENSATION

NOTE 21. STOCK PLANS AND STOCK-BASED COMPENSATION

For stock options, SSARs and non-performance-based RSUs, stock-based compensation expense is recognized on a straight-line basis ratably over the respective vesting periods. For RSUs subject to graded vesting schedules for which vesting is based on achievement of a performance metric in addition to grantee service (performance-based RSUs), stock-based compensation expense is recognized on an accelerated basis by treating each vesting tranche as if it was a separate grant. A summary of the components of stock-based compensation expense recognized during the years ended June 30, 2017, 2016, and 2015, together with the income tax benefits realized, is as follows (in thousands):

	Year ended June 30,
	2017		2016		2015
Stock-based compensation included in indirect costs and selling expense:
Restricted stock and RSU expense	$	21,945	$	17,919	$	14,072
Income tax benefit recognized for stock-based compensation expense	$	7,498	$	6,476	$	5,260

The Company recognizes the effect of expected forfeitures of equity grants by estimating an expected forfeiture rate for grants of equity instruments. Amounts recognized for expected forfeitures are subsequently adjusted periodically and at major vesting dates to reflect actual forfeitures.

The incremental income tax benefits realized upon the exercise or vesting of equity instruments are reported as operating cash flows. During the years ended June 30, 2017, 2016, and 2015, the Company recognized $1.6 million, $1.2 million, and $3.5 million of excess tax benefits, respectively, which have been reported as operating cash inflows in the accompanying consolidated statements of cash flows.

Equity Grants and Valuation

Under the terms of its 2016 Amended and Restated Incentive Compensation Plan (the 2016 Plan), the Company may issue, among others, non-qualified stock options, restricted stock, RSUs, SSARs, and performance awards, collectively referred to herein as equity instruments. The 2016 Plan was approved by the Company’s stockholders in November 2016 and amended and restated the 2006 Stock Incentive Plan (the 2006 Plan) which was due to expire at the end of the ten-year period. Previous grants that were made under the 2006 Plan, and equity instruments granted prior to approval of the 2016 Plan continue to be governed by the terms of the 2006 Plan. During the periods presented all equity instrument grants were made in the form of RSUs. Other than performance-based RSUs (PRSUs) which contain a market-based element, the fair value of RSU grants was determined based on the closing price of a share of the Company’s common stock on the date of grant. The fair value of RSUs with market-based vesting features was also measured on the grant date, but was done so using a binomial lattice model.

Annual grants under the 2016 Plan, and previously the 2006 Plan, are generally made to the Company’s key employees during the first quarter of the Company’s fiscal year and to members of the Company’s Board of Directors during the second quarter of the Company’s fiscal year. With the approval of its Chief Executive Officer, the Company also issues equity instruments to strategic new hires and to employees who have demonstrated superior performance.

In September 2014, the Company made its annual grant to key employees consisting of 180,570 PRSUs. The final number of such PRSUs that are earned by participants and vest is based on the achievement of a specified earnings per share (EPS) for the year ended June 30, 2015 and on the average share price of Company stock for the 90 day period ending September 23, 2015, 2016 and 2017 as compared to the average share price for the 90 day period ended September 23, 2014. The specified EPS for the year ended June 30, 2015 was met and the average share price of the Company’s stock for the 90 day periods ending September 23, 2015 and September 23, 2016 exceeded the average share price of the Company’s stock for the 90 day period ended September 23, 2014, resulting in an additional 26,957 RSUs earned by participants. In addition to the performance and market conditions, there is a service vesting condition which stipulates that 50 percent of the earned award will vest on September 1, 2017 and 50 percent of the earned award will vest on September 1, 2018, in both cases dependent upon continuing service by the grantee as an employee of the Company, unless the grantee is eligible for earlier vesting upon retirement, as defined.

In September 2015, the Company made its annual grant to key employees consisting of 208,160 PRSUs. The final number of such PRSUs that are earned by participants and vest is based on the achievement of a specified EPS for the year ending June 30, 2016 and on the average share price of Company stock for the 90 day periods ending September 18, 2016, 2017 and 2018 as compared to the average share price for the 90 day period ended September 18, 2015. The specified EPS for the year ended June 30, 2016 was met and the average share price of the Company’s stock for the 90 day period ending September 18, 2016 exceeded the average share price of the Company’s stock for the 90 day period ended September 18, 2015, resulting in an additional 11,811 RSUs earned by participants. This is the maximum number of additional RSUs that can be earned related to the September 2015 annual grant. In addition to the performance and market conditions, there is a service vesting condition which stipulates that 50 percent of the earned award will vest on September 18, 2018 and 50 percent of the earned award will vest on September 18, 2019, in both cases dependent upon continuing service by the grantee as an employee of the Company, unless the grantee is eligible for earlier vesting upon retirement or certain other events.

In September 2016, the Company made its annual grant to its key employees consisting of 193,420 PRSUs. The final number of such PRSUs that are earned by participants and vest is based on the achievement of a specified EPS for the year ended June 30, 2017 and on the average share price of Company stock for the 90 day period ending September 30, 2017, 2018 and 2019 as compared to the average share price for the 90 day period ended September 30, 2016. The specified EPS for the year ended June 30, 2017 was met. If the average share price of the Company’s stock for the 90 day period ending September 30, 2017, 2018 and 2019 exceeds the average share price of the Company’s stock for the 90 day period ended September 30, 2016 by 100 percent or more, then an additional 193,420 could be earned by participants. This is the maximum number of additional RSUs that can be earned related to the September 2016 annual grant. In addition to the performance and market conditions, there is a service vesting condition which stipulates that 50 percent of the earned award will vest on October 1, 2019 and 50 percent of the earned award will vest on October 1, 2020, in both cases dependent upon continuing service by the grantee as an employee of the Company, unless the grantee is eligible for earlier vesting upon retirement or certain other events.

The Company also issues equity instruments in the form of RSUs under its Management Stock Purchase Plan (MSPP) and Director Stock Purchase Plan (DSPP). In addition, annual grants are made to members of the Company’s Board of Directors in the form of a set dollar value of RSUs. Grants to members of the Board of Directors vest based on the passage of time and continued service as a Director of the Company.

Upon the exercise of stock options and SSARs and the vesting of restricted shares and RSUs, the Company fulfills its obligations under the equity instrument agreements by either issuing new shares of authorized common stock or by issuing shares from treasury. As of June 30, 2017, the total number of shares authorized by shareholders for grants under the 2016 Plan and its predecessor plan was 1,200,000 plus any forfeitures from the 2006 Plan. The aggregate number of grants that may be made may exceed this approved amount as forfeited SSARs, stock options, restricted stock and RSUs, and vested but unexercised SSARs and stock options that expire, become available for future grants. As of June 30, 2017, cumulative grants of 41,756 equity instruments underlying the shares authorized have been awarded, and 52,169 of these instruments have been forfeited.

Restricted shares and most non-performance-based RSUs vest in full three years from the date of grant. RSUs granted to the Company’s Chief Executive Officer in February 2013 and to the Company’s Chief Operating Officer in February 2012 have longer vesting periods. SSARs granted in prior years as part of the Company’s then customary annual award vest ratably over a five year period in a manner consistent with the vesting of stock options. As of June 30, 2017 all stock options and SSARs are fully vested and exercised.

We account for share-based payments to employees, including grants of employee stock awards and purchases under employee stock purchase plans, in accordance with ASC 718, Compensation—Stock Compensation, which requires that share-based payments (to the extent they are compensatory) be recognized in our consolidated statements of operations based on their fair values. We determine the fair value of our market-based and performance-based RSUs at the date of grant using generally accepted valuation techniques and the closing market price of our stock. The fair value for the annual grant made in September 2016 was determined using a Monte Carlo simulation model incorporating the following factors: 90 day average stock price at the grant date of $96.56 a share, risk free rate of return of 0.88 percent, and expected volatility of 24.20 percent. Stock-based compensation cost is recognized as expense on an accelerated basis over the requisite service period for performance based awards. The weighted-average fair value of RSUs granted during the years ended June 30, 2017, 2016, and 2015, was $104.45, $80.72, and $76.37, respectively.

No stock options or SSARs were granted during the years ended June 30, 2017, 2016 or 2015. Activity for all outstanding SSARs and stock options, and the corresponding exercise price and fair value information, for the years ended June 30, 2017, 2016, and 2015, is as follows:

	Number of Shares			Exercise Price		Weighted Average Exercise Price		Weighted Average Grant Date Fair Value
Outstanding, June 30, 2014		91,950		37.67 – 59.30			48.77		17.02
Exercisable, June 30, 2014		91,950		37.67 – 59.30			48.77		17.02
Exercised		(44,290	)	37.67 – 59.30			49.36		17.33
Forfeited		—			—		—		—
Expired		(5,000	)		47.59		47.59		10.68
Outstanding, June 30, 2015		42,660		37.67 – 49.36			48.29		17.45
Exercisable, June 30, 2015		42,660		37.67 – 49.36			48.29	$	17.45
Exercised		(35,860	)	37.67 – 49.36			48.18		17.25
Forfeited		—			—		—		—
Expired		(6,800	)		48.83		48.83		18.50
Outstanding, June 30, 2016		—			—		—		—
Exercisable, June 30, 2016		—			—	$	—	$	—
Exercised		—			—		—		—
Forfeited		—			—		—		—
Expired		—			—		—		—
Outstanding, June 30, 2017		—			—		—		—
Exercisable, June 30, 2017		—			—	$	—	$	—

Changes in the number of unvested restricted stock and RSUs during each of the years in the three-year period ended June 30, 2017, 2016, and 2015, together with the corresponding weighted-average fair values, are as follows:

	Restricted Stock and Restricted Stock Units
	Number of Shares			Weighted Average Grant Date Fair Value
Unvested at June 30, 2014		838,242		$	55.39
Granted		322,121			76.37
Vested		(250,613	)		47.84
Forfeited		(45,184	)		66.89
Unvested at June 30, 2015		864,566			64.79
Granted		275,117		$	80.72
Vested		(209,448	)		49.48
Forfeited		(56,381	)		75.79
Unvested at June 30, 2016		873,854		$	71.20
Granted		256,853			104.45
Vested		(233,296	)		65.07
Forfeited		(62,804	)		93.12
Unvested at June 30, 2017		834,607		$	85.28

Information regarding the cash proceeds received, and the intrinsic value and total tax benefits realized resulting from SSARs and stock option exercises is as follows (in thousands):

	Year ended June 30,
	2017		2016		2015
Cash proceeds received	$	—	$	—	$	872
Intrinsic value realized	$	—	$	1,286	$	1,646
Income tax benefit realized	$	—	$	465	$	615

The total intrinsic value of RSUs that vested during the years ended June 30, 2017, 2016, and 2015 was $26.6 million, $18.4 million and $18.6 million, respectively, and the tax benefit realized was $4.8 million, $3.3 million and $7.0 million, respectively.

As of June 30, 2017, there was no unrecognized compensation cost related to SSARs and stock options and $34.2 million of unrecognized compensation cost related to restricted stock and RSUs scheduled to be recognized over a weighted-average period of 2.6 years.

Stock Purchase Plans

The Company adopted the 2002 Employee Stock Purchase Plan (ESPP), MSPP and DSPP in November 2002, and implemented these plans beginning July 1, 2003. There are 1,250,000, 500,000, and 75,000 shares authorized for grants under the ESPP, MSPP and DSPP, respectively.

The ESPP allows eligible full-time employees to purchase shares of common stock at 95 percent of the fair market value of a share of common stock on the last day of the quarter. The maximum number of shares that an eligible employee can purchase during any quarter is equal to two times an amount determined as follows: 20 percent of such employee’s compensation over the quarter, divided by 95 percent of the fair market value of a share of common stock on the last day of the quarter. The ESPP is a qualified plan under Section 423 of the Internal Revenue Code and, for financial reporting purposes, was amended effective July 1, 2005 so as to be considered non-compensatory. Accordingly, there is no stock-based compensation expense associated with shares acquired under the ESPP. As of June 30, 2017, participants have purchased 1,112,695 shares under the ESPP, at a weighted-average price per share of $51.65. Of these shares, 40,989 were purchased by employees at a weighted-average price per share of $101.25 during the year ended June 30, 2017. During the year ended June 30, 2013, the Company established a 10b5-1 plan to facilitate the open market purchase of shares of Company stock to satisfy its obligations under the ESPP.

The MSPP provides those senior executives with stock holding requirements a mechanism to receive RSUs in lieu of up to 100 percent of their annual bonus. For the fiscal years ended June 30, 2017, 2016, and 2015, RSUs awarded in lieu of bonuses earned were granted at 85 percent of the closing price of a share of the Company’s common stock on the date of the award, as reported by the New York Stock Exchange. RSUs granted under the MSPP vest at the earlier of 1) three years from the grant date, 2) upon a change of control of the Company, 3) upon a participant’s retirement at or after age 65, or 4) upon a participant’s death or permanent disability. Vested RSUs are settled in shares of common stock. The Company recognizes the value of the discount applied to RSUs granted under the MSPP as stock compensation expense ratably over the three-year vesting period.

The DSPP allows directors to elect to receive RSUs at the market price of the Company’s common stock on the date of the award in lieu of up to 100 percent of their annual retainer fees. Vested RSUs are settled in shares of common stock. There were no DSPP awards outstanding during the year ended June 30, 2017.

Activity related to the MSPP during the year ended June 30, 2017 is as follows:

	MSPP
RSUs outstanding, June 30, 2016		1,393
Granted		1,978
Issued		(204	)
Forfeited		—
RSUs outstanding, June 30, 2017		3,167
Weighted average grant date fair value as adjusted for the applicable discount	$	81.02

FAIR VALUE OF FINANCIAL INSTRUMENTS

12 Months Ended

Jun. 30, 2017

Fair Value Disclosures [Abstract]

FAIR VALUE OF FINANCIAL INSTRUMENTS

NOTE 22. FAIR VALUE OF FINANCIAL INSTRUMENTS

ASC 820, Fair Value Measurements and Disclosures, defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. Fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in an orderly transaction. The market in which the reporting entity would sell the asset or transfer the liability with the greatest volume and level of activity for the asset or liability is known as the principal market. When no principal market exists, the most advantageous market is used. This is the market in which the reporting entity would sell the asset or transfer the liability with the price that maximizes the amount that would be received or minimizes the amount that would be paid. Fair value is based on assumptions market participants would make in pricing the asset or liability. Generally, fair value is based on observable quoted market prices or derived from observable market data when such market prices or data are available. When such prices or inputs are not available, the reporting entity should use valuation models.

The Company’s financial assets and liabilities recorded at fair value on a recurring basis are categorized based on the priority of the inputs used to measure fair value. The inputs used in measuring fair value are categorized into three levels, as follows:

•

Level 1 Inputs – unadjusted quoted prices in active markets for identical assets or liabilities.

•

Level 2 Inputs – unadjusted quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, inputs other than quoted prices that are observable, and inputs derived from or corroborated by observable market data.

•

Level 3 Inputs – amounts derived from valuation models in which unobservable inputs reflect the reporting entity’s own assumptions about the assumptions of market participants that would be used in pricing the asset or liability.

The Company’s financial instruments measured at fair value included interest rate swap agreements and contingent consideration in connection with business combinations. The following table summarizes the financial assets and liabilities measured at fair value on a recurring basis as of June 30, 2017 and June 30, 2016, and the level they fall within the fair value hierarchy (in thousands):

			As of June 30,
	Financial Statement	Fair Value	2017		2016
Description of Financial Instrument	Classification	Hierarchy	Fair Value
Contingent consideration	Other accrued expenses and current liabilities	Level 3	$	14,889	$	—
Contingent consideration	Other long-term liabilities	Level 3	$	658	$	15,171
Interest rate swap agreements	Other long-term assets	Level 2	$	5,559	$	—
Interest rate swap agreements	Other accrued expenses and current liabilities	Level 2	$	3	$	—
Interest rate swap agreements	Other long-term liabilities	Level 2	$	3,110	$	21,609

The Company entered into interest rate swap agreements to manage its interest rate risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves. To comply with the provisions of ASC 820, the Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. Changes in the fair value of the interest rate swap agreements are recorded as a component of accumulated other comprehensive income or loss.

Various acquisitions completed during FY2016 (see Note 4) contained provisions requiring that the Company pay contingent consideration in the event the acquired businesses achieved certain specified earnings results during the two and three year periods subsequent to each acquisition. The Company determined the fair value of the contingent consideration as of each acquisition date using a valuation model which included the evaluation of the most likely outcome and the application of an appropriate discount rate. At the end of each reporting period, the fair value of the contingent consideration was remeasured and any changes were recorded in indirect costs and selling expenses. During the years ended June 30, 2017 and 2016, respectively, this remeasurement resulted in a $0.7 million increase to the liability recorded.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

EARNINGS PER SHARE

12 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

EARNINGS PER SHARE

NOTE 23. EARNINGS PER SHARE

Earnings per share and the weighted-average number of diluted shares are computed as follows (in thousands, except per share data):

	Year ended June 30,
	2017		2016		2015
Net income attributable to CACI	$	163,671	$	142,799	$	126,195
Weighted-average number of basic shares outstanding during the period		24,401		24,262		23,948
Dilutive effect of SSARs/stock options and RSUs/restricted shares after application of treasury stock method		668		540		384
Dilutive effect of the warrants		—		—		56
Weighted-average number of diluted shares outstanding during the period		25,069		24,802		24,388
Basic earnings per share	$	6.71	$	5.89	$	5.27
Diluted earnings per share	$	6.53	$	5.76	$	5.17

There were no anti-dilutive common stock equivalents for the years ended June 30, 2017, 2016, and 2015 because the Company’s average stock price exceeded the exercise price of all shares outstanding. The calculation of diluted earnings per share for the year ended June 30, 2017 includes the shares underlying the performance-based RSUs granted in September 2016, September 2015 and September 2014. During the year ended June 30, 2015 the Company issued 0.5 million shares of common stock for settlement of its warrants. Pursuant to the terms of the warrant transaction, the warrants settled daily over 90 trading days which began in August 2014 and end in December 2014. The contingently issuable shares that may have resulted from the maturity of the warrants were included in the computation of diluted earnings per share because the Company’s average stock price during the first and second quarters of the year ended June 30, 2015 was greater than the warrants’ exercise price of $68.31.

QUARTERLY FINANCIAL DATA (UNAUDITED)

12 Months Ended

Jun. 30, 2017

Quarterly Financial Data [Abstract]

QUARTERLY FINANCIAL DATA (UNAUDITED)

NOTE 24. QUARTERLY FINANCIAL DATA (UNAUDITED)

This data is unaudited, but in the opinion of management, includes and reflects all adjustments that are normal and recurring in nature, and necessary, for a fair presentation of the selected data for these interim periods. Quarterly condensed financial operating results of the Company for the years ended June 30, 2017 and 2016, are presented below (in thousands except per share data).

	Year ended June 30, 2017
	First		Second		Third		Fourth
Revenue	$	1,073,280	$	1,057,530	$	1,086,418	$	1,137,389
Income from operations	$	69,658	$	80,255	$	67,254	$	80,094
Net income attributable to CACI	$	36,663	$	42,420	$	40,357	$	44,231
Basic earnings per share	$	1.51	$	1.74	$	1.65	$	1.81
Diluted earnings per share	$	1.47	$	1.69	$	1.61	$	1.76
Weighted-average shares outstanding:
Basic		24,340		24,387		24,419		24,459
Diluted		24,928		25,069		25,106		25,172

	Year ended June 30, 2016
	First		Second		Third		Fourth
Revenue	$	822,442	$	830,437	$	977,274	$	1,113,900
Income from operations	$	64,508	$	55,482	$	63,676	$	81,084
Net income attributable to CACI	$	34,632	$	30,452	$	34,116	$	43,599
Basic earnings per share	$	1.43	$	1.26	$	1.41	$	1.79
Diluted earnings per share	$	1.40	$	1.23	$	1.38	$	1.75
Weighted-average shares outstanding:
Basic		24,208		24,246		24,277		24,319
Diluted		24,721		24,786		24,801		24,900

VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Jun. 30, 2017

Valuation And Qualifying Accounts [Abstract]

VALUATION AND QUALIFYING ACCOUNTS

CACI INTERNATIONAL INC

VALUATION AND QUALIFYING ACCOUNTS

FOR YEARS ENDED JUNE 30, 2017, 2016 AND 2015

(in thousands)

	Balance at Beginning of Period		Additions at Cost		Deductions			Other Changes			Balance at End of Period
2017
Reserves deducted from assets to which they apply:
Allowances for doubtful accounts	$	2,997	$	1,293	$	(690	)	$	(49	)	$	3,551
2016
Reserves deducted from assets to which they apply:
Allowances for doubtful accounts	$	3,282	$	536	$	(497	)	$	(324	)	$	2,997
2015
Reserves deducted from assets to which they apply:
Allowances for doubtful accounts	$	3,734	$	800	$	(1,055	)	$	(197	)	$	3,282

Items included as “Other Changes” primarily includes foreign currency exchange differences.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Jun. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements of the Company have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) and include the assets, liabilities, results of operations and cash flows for the Company, including its subsidiaries and ventures that are majority-owned or otherwise controlled by the Company. All intercompany balances and transactions have been eliminated in consolidation.
Revenue Recognition	Revenue Recognition Revenue is recognized when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the fee is fixed or determinable, and collectability is reasonably assured. The Company generates almost all of its revenue from three different types of contractual arrangements: cost-plus-fee, time-and-materials, and fixed price contracts. Revenue on cost-plus-fixed fee contracts is recognized in an amount equal to allowable costs incurred plus the proportionate amount of the applicable fee earned. For cost-plus-fee contracts with either award or incentive fee amounts, which are accounted for within the scope of ASC 605-10-S99, the Company recognizes revenue in an amount equal to the allowable costs incurred plus the variable portion of the fee upon customer notification of the fee amount earned. Revenue on time-and-materials contracts is recognized in an amount equal to direct labor hours expended multiplied by the contractual billable rate per hour plus the costs of material and other direct costs incurred on behalf of the customer. Revenue on fixed price contracts within the scope of ASC 605-35 is recognized using the percentage-of-completion (POC) method. For these arrangements, substantially all revenue is recognized using a cost-to-cost input method based on the ratio of contractual costs incurred to date in proportion to total estimated costs at completion. When estimates of total costs to be incurred on a contract exceed estimates of total revenue to be earned, a provision for the entire loss on the contract is recorded in the period in which the loss is determined. For fixed price service and maintenance type contracts within the scope of ASC 605-10-S99, revenue is generally recognized over the period in which services are performed. The Company uses straight-line revenue recognition when value is being transferred evenly throughout the performance period or when there is not a clearly defined pattern of service. An efforts-expended method, primarily using labor hours, may be used in a proportional performance calculation when it more closely approximates the transfer of value to the customer. Revenue on fixed unit price contracts is recognized in an amount equal to units delivered multiplied by the specified price per unit. Revenue on manufactured products is recognized upon passage of title to the customer. Revenue on fixed price/level of effort contracts is similar to time-and-materials arrangements and is recognized based upon the direct labor hours expended multiplied by the contractual billable rate per hour plus the costs of material and other direct costs incurred on behalf of the customer. Contract accounting requires judgment relative to assessing risks, estimating contract revenue and costs, and making assumptions for schedule and technical issues. Due to the size and nature of many of the Company’s contracts, the estimation of total revenue and cost at completion is complicated and subject to many variables. Contract costs include material, labor, subcontracting costs, and other direct costs, as well as an allocation of allowable indirect costs. Assumptions have to be made regarding the length of time to complete the contract because costs also include expected increases in wages and prices for materials. For contract change orders, claims or similar items, the Company applies judgment in estimating the amounts and assessing the potential for realization. These amounts are only included in contract value when they can be reliably estimated and realization is considered probable. Incentives or penalties related to performance on contracts are considered in estimating sales and profit rates, and are recorded when there is sufficient information for the Company to assess anticipated performance. Estimates of award fees for certain contracts are also a factor in estimating revenue and profit rates based on actual and anticipated awards. From time to time, the Company may proceed with work based on customer direction prior to the completion and signing of formal contract documents. The Company has a formal review process for approving any such work. Revenue associated with such work is recognized only when it can be reliably estimated and realization is probable. The Company bases its estimates on previous experiences with the customer, communications with the customer regarding funding status, and its knowledge of available funding for the contract or program. The Company’s U.S. government contracts comprise 93.9 and 93.5 percent of total revenue in the year ended June 30, 2017 and 2016, respectively and are subject to subsequent government audit of direct and indirect costs. Incurred cost audits have been completed through June 30, 2009. Management does not anticipate any material adjustment to the consolidated financial statements in subsequent periods for audits not yet started or completed.
Costs of Revenue	Costs of Revenue Costs of revenue include all direct contract costs including subcontractor costs, as well as indirect overhead costs and selling, general and administrative expenses that are allowable and allocable to contracts under federal procurement standards. Costs of revenue also include costs and expenses that are unallowable under applicable procurement standards, and are not allocable to contracts for billing purposes. Such costs and expenses do not directly generate revenue, but are necessary for business operations.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all investments with an original maturity of three months or fewer on their trade date to be cash equivalents. The Company classifies investments with an original maturity of more than three months but fewer than twelve months on their trade date as short-term marketable securities.
Receivables and Allowance for Doubtful Accounts	Receivables and Allowance for Doubtful Accounts Receivables are recorded at amounts earned less an allowance for doubtful accounts. The company periodically reassesses the adequacy of its allowance for doubtful accounts by analyzing reasonably available information as of the balance sheet date, including the length of time that the receivable has been outstanding, historical bad debts and aging trends, and other general and contract specific factors. Upon determination that a specific receivable is uncollectible, the receivable is written off against the allowance for doubtful accounts reserve.
Inventories	Inventories Inventories are stated at the lower of cost or market. A provision for damaged, deteriorated, or obsolete inventory is recorded based on historical usage patterns and forecasted sale. Inventories are included within prepaid expenses and other current assets on the accompanying consolidated balance sheets.
Accounting for Business Combinations and Goodwill	Accounting for Business Combinations and Goodwill The purchase price of an acquired business is allocated to the tangible assets and separately identifiable intangible assets acquired less liabilities assumed based upon their respective fair values, with the excess recorded as goodwill. The Company evaluates goodwill at least annually for impairment, or whenever events or circumstances indicate that the carrying value may not be recoverable. The evaluation includes comparing the fair value of the relevant reporting unit to the carrying value, including goodwill, of such unit. The level at which the Company tests goodwill for impairment requires management to determine whether the operations below the operating segments constitute a self-sustaining business for which discrete financial information is available and segment management regularly reviews the operating results. If the fair value exceeds the carrying value, no impairment loss is recognized. However, if the carrying value of the reporting unit exceeds its fair value, the goodwill of the reporting unit may be impaired. Impairment is measured by comparing the implied fair value of the goodwill to its carrying value. Separately identifiable intangible assets with estimable useful lives are amortized over their respective estimated useful lives to their estimated residual values, and reviewed for impairment if impairment indicators are present. As part of the annual assessment, the Company estimates the fair value of its reporting units using both an income approach and a market approach. The valuation process considers management’s estimates of the future operating performance of each reporting unit. Companies in similar industries are researched and analyzed and management considers the domestic and international economic and financial market conditions, both in general and specific to the industry in which the Company operates, prevailing as of the valuation date. The income approach utilizes discounted cash flows. The Company calculates a weighted average cost of capital for each reporting unit in order to estimate the discounted cash flows. The Company evaluates goodwill as of the first day of the fourth quarter. In addition, the Company will perform interim impairment testing should circumstances requiring it arise. The Company completed its annual goodwill assessment as of April 1, 2017 and no impairment charge was necessary as a result of this assessment.
Long-Lived Assets (Excluding Goodwill)	Long-Lived Assets (Excluding Goodwill) Long-lived assets such as property and equipment and intangible assets subject to amortization are reviewed for impairment whenever events or circumstances indicate that the carrying amount of an asset may not be fully recoverable. An impairment loss would be recognized if the sum of the long-term undiscounted cash flows is less than the carrying amount of the long-lived asset being evaluated. Any write-downs are treated as permanent reductions in the carrying amount of the assets. Property and equipment is recorded at cost. Depreciation of equipment and furniture has been provided over the estimated useful life of the respective assets (ranging from three to eight years) using the straight-line method. Leasehold improvements are generally amortized using the straight-line method over the remaining lease term or the useful life of the improvements, whichever is shorter. Repairs and maintenance costs are expensed as incurred. Separately identifiable definite-lived intangible assets are amortized over their respective estimated useful lives.
External Software Development Costs	External Software Development Costs Costs incurred in creating a software product to be sold or licensed for external use are charged to expense when incurred as indirect costs and selling expenses until technological feasibility has been established for the software. Technological feasibility is established upon completion of a detailed program design or, in its absence, completion of a working software version. Thereafter, all such software development costs are capitalized and subsequently reported at the lower of unamortized cost or estimated net realizable value. Capitalized costs are amortized on a straight-line basis over the remaining estimated economic life of the product.
Supplemental Retirement Savings Plan	Supplemental Retirement Savings Plan The Company maintains the CACI International Inc Group Executive Retirement Plan (the Supplemental Savings Plan) and maintains the underlying assets in a Rabbi Trust. The Supplemental Savings Plan is a non-qualified defined contribution supplemental retirement savings plan for certain key employees whereby participants may elect to defer and contribute a portion of their compensation, as permitted by the plan. Each participant directs his or her investments in the Supplemental Savings Plan (see Note 20). A Rabbi Trust is a grantor trust established to fund compensation for a select group of management. The assets of this trust are available to satisfy the claims of general creditors in the event of bankruptcy of the Company. The assets held by the Rabbi Trust are invested in corporate owned life insurance (COLI) products. The COLI products are recorded at cash surrender value in the consolidated financial statements as supplemental retirement savings plan assets. The amounts due to participants are based on contributions, participant investment elections, and other participant activity and are recorded as supplemental retirement savings plan obligations.
Income Taxes	Income Taxes Income taxes are accounted for using the asset and liability method whereby deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the consolidated financial statement carrying amounts of assets and liabilities, and their respective tax bases, and operating loss and tax credit carry forwards. The Company accounts for tax contingencies in accordance with ASC 740-10-25, Income Taxes – Recognition. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities due to a change in tax rates is recognized in income in the period that includes the enactment date. Estimates of the realizability of deferred tax assets are based on the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies. Any interest or penalties incurred in connection with income taxes are recorded as part of income tax expense for financial reporting purposes.
Costs of Acquisitions	Costs of Acquisitions Costs associated with legal, financial and other professional advisors related to acquisitions, whether successful or unsuccessful, are expensed as incurred.
Foreign Currency Translation	Foreign Currency Translation The assets and liabilities of the Company’s foreign subsidiaries whose functional currency is other than the U.S. dollar are translated at the exchange rate in effect on the reporting date, and income and expenses are translated at the weighted-average exchange rate during the period. The Company’s primary practice is to negotiate contracts in the same currency in which the predominant expenses are incurred, thereby mitigating the exposure to foreign currency fluctuations. The net translation gains and losses are not included in determining net income, but are accumulated as a separate component of shareholders’ equity. Foreign currency transaction gains and losses are included in determining net income, but are insignificant. These costs are included as indirect costs and selling expenses in the accompanying consolidated statements of operations.
Earnings Per Share	Earnings Per Share Basic earnings per share excludes dilution and is computed by dividing income by the weighted average number of common shares outstanding for the period. Diluted earnings per share reflects potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock but not securities that are anti-dilutive, including stock options and stock settled stock appreciation rights (SSARs) with an exercise price greater than the average market price of the Company’s common stock. Using the treasury stock method, diluted earnings per share includes the incremental effect of SSARs, stock options, restricted shares, and those restricted stock unit (RSUs) that are no longer subject to a market or performance condition. Information about the weighted-average number of basic and diluted shares is presented in Note 23.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable and amounts included in other current assets and current liabilities that meet the definition of a financial instrument approximate fair value because of the short-term nature of these amounts. The fair value of the Company’s debt under its bank credit facility approximates its carrying value at June 30, 2017. The fair value of the Company’s debt under its bank credit facility was estimated using Level 2 inputs based on market data on companies with a corporate rating similar to CACI’s that have recently priced credit facilities.
Concentrations of Credit Risk	Concentrations of Credit Risk Financial instruments that potentially subject the Company to credit risk include accounts receivable and cash equivalents. Management believes that credit risk related to the Company’s accounts receivable is limited due to a large number of customers in differing segments and agencies of the U.S. government. Accounts receivable credit risk is also limited due to the credit worthiness of the U.S. government. Management believes the credit risk associated with the Company’s cash equivalents is limited due to the credit worthiness of the obligors of the investments underlying the cash equivalents. In addition, although the Company maintains cash balances at financial institutions that exceed federally insured limits, these balances are placed with high quality financial institutions.
Comprehensive Income (Loss)	Comprehensive Income (Loss) Comprehensive income is the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. Other comprehensive income (loss) refers to revenue, expenses, and gains and losses that under U.S. GAAP are included in comprehensive income, but excluded from the determination of net income. The elements within other comprehensive income consist of foreign currency translation adjustments; the changes in the fair value of interest rate swap agreements, net of tax of $9.5 million, $3.9 million and $1.6 million for the years ended June 30, 2017, 2016 and 2015, respectively; and differences between actual amounts and estimates based on actuarial assumptions and the effect of changes in actuarial assumptions made under the Company’s post-retirement benefit plans, net of tax (see Note 15). As of June 30, 2017 and 2016, accumulated other comprehensive loss included a loss of $29.5 million and $26.7 million, respectively, related to foreign currency translation adjustments, a gain of $1.5 million and a loss of $13.1 million, respectively, related to the fair value of its interest rate swap agreements, and a loss of $1.1 million and $1.3 million, respectively, related to unrecognized post-retirement costs.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported periods. Management estimates include estimated costs to complete and estimated award fees for contracts accounted for under ASC 605-35, amortization periods for long-lived intangible assets, recoverability of long-lived assets, reserves for accounts receivable, and reserves for contract related matters. Actual results could differ from these estimates.
Commitments and Contingencies	Commitments and Contingencies The Company is involved in various lawsuits, claims, and administrative proceedings arising in the normal course of business. Management is of the opinion that any liability or loss associated with such matters, either individually or in the aggregate, will not have a material adverse effect on the Company’s operations and liquidity. Liabilities for loss contingencies arising from claims, assessments, litigation, fines and penalties and other sources are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated.

ACQUISITIONS (Tables) - NSS Acquisition

12 Months Ended

Jun. 30, 2017

Business Acquisition [Line Items]

Assets Acquired and Liabilities Assumed

Cash and cash equivalents	$	2,596
Accounts receivable		210,459
Prepaid expenses and other current assets		14,461
Property and equipment		21,320
Intangible assets, other than goodwill		110,500
Goodwill		360,230
Other long-term assets		437
Accounts payable		(57,616	)
Accrued compensation and benefits		(38,953	)
Accrued expenses and other current liabilities		(38,432	)
Deferred income taxes		(37,796	)
Other long-term liabilities		(5,343	)
Total consideration	$	541,863

Schedule of Unaudited Pro Forma Results of Operations

	(Unaudited)
	Year ended June 30,
	2016			2015
Revenue	$	4,418,997		$	4,401,345
Net loss		(300,363	)		(15,480	)
Basic loss per share		(12.38	)		(0.65	)
Diluted loss per share		(12.38	)		(0.65	)

CASH AND CASH EQUIVALENTS (Tables)

12 Months Ended

Jun. 30, 2017

Cash And Cash Equivalents [Abstract]

Schedule of cash and cash equivalents

Cash and cash equivalents consisted of the following (cost approximates fair value) (in thousands):

	June 30,
	2017		2016
Cash	$	65,091	$	45,117
Money market funds		448		3,965
Total cash and cash equivalents	$	65,539	$	49,082

ACCOUNTS RECEIVABLE (Tables)

12 Months Ended

Jun. 30, 2017

Accounts Receivable Net [Abstract]

Schedule of Total Accounts Receivable

Total accounts receivable, net of allowance for doubtful accounts of $3.6 million and $3.0 million at June 30, 2017 and 2016, respectively, consisted of the following (in thousands):

	June 30,
	2017		2016
Billed receivables	$	546,041	$	599,206
Billable receivables at end of period		179,350		172,585
Unbilled receivables pending receipt of contractual documents authorizing billing		31,950		32,026
Total accounts receivable, current		757,341		803,817
Unbilled receivables, retainages and fee withholdings expected to be billed beyond the next 12 months		7,886		8,330
Total accounts receivable	$	765,227	$	812,147

GOODWILL (Tables)

12 Months Ended

Jun. 30, 2017

Goodwill [Abstract]

Rollforward of Goodwill

The changes in the carrying amount of goodwill for the years ended June 30, 2017 and 2016 are as follows (in thousands):

	Domestic			International			Total
Balance at June 30, 2015	$	2,108,768		$	81,048		$	2,189,816
Goodwill acquired (1)		378,380			29,939			408,319
Foreign currency translation		—			(12,792	)		(12,792	)
Balance at June 30, 2016	$	2,487,148		$	98,195		$	2,585,343
Goodwill acquired (1)		(7,652	)		2,220			(5,432	)
Foreign currency translation		—			(2,476	)		(2,476	)
Balance at June 30, 2017	$	2,479,496		$	97,939		$	2,577,435

⁽¹⁾	Includes goodwill initially allocated to new business acquisitions as well as purchase accounting adjustments.

INTANGIBLE ASSETS (Tables)

12 Months Ended

Jun. 30, 2017

Finite Lived Intangible Assets Net [Abstract]

Schedule of Intangible Assets

Intangible assets consisted of the following (in thousands):

	June 30,
	2017			2016
Intangible assets
Customer contracts and related customer relationships	$	635,895		$	635,826
Acquired technologies		28,503			28,074
Covenants not to compete		3,305			3,321
Other		1,545			1,551
Intangible assets		669,248			668,772
Less accumulated amortization
Customer contracts and related customer relationships		(402,934	)		(363,412	)
Acquired technologies		(26,542	)		(25,693	)
Covenants not to compete		(3,288	)		(3,245	)
Other		(1,113	)		(1,050	)
Accumulated amortization		(433,877	)		(393,400	)
Total intangible assets, net	$	235,371		$	275,372

Expected Amortization Expense

Expected amortization expense for each of the fiscal years through June 30, 2022 and for years thereafter is as follows (in thousands):

	Amount
Year ending June 30, 2018	$	36,271
Year ending June 30, 2019		31,602
Year ending June 30, 2020		27,130
Year ending June 30, 2021		23,932
Year ending June 30, 2022		20,640
Thereafter		95,796
Total intangible assets, net	$	235,371

PROPERTY AND EQUIPMENT (Tables)

12 Months Ended

Jun. 30, 2017

Property Plant And Equipment [Abstract]

Schedule of Property and Equipment

Property and equipment consisted of the following (in thousands):

	June 30,
	2017			2016
Equipment and furniture	$	138,742		$	126,437
Leasehold improvements		94,643			92,103
Property and equipment, at cost		233,385			218,540
Less accumulated depreciation and amortization		(141,636	)		(137,178	)
Total property and equipment, net	$	91,749		$	81,362

CAPITALIZED EXTERNAL SOFTWARE DEVELOPMENT COSTS (Tables)

12 Months Ended

Jun. 30, 2017

Capitalized Computer Software Net [Abstract]

Summary of Changes in Capitalized External Software Development Costs

A summary of changes in capitalized external software development costs, including costs capitalized and amortized during each of the years in the three-year period ended June 30, 2017, is as follows (in thousands):

	Year ended June 30,
	2017			2016			2015
Capitalized software development costs, beginning of year	$	15,432		$	15,255		$	16,594
Costs capitalized		3,003			3,407			2,572
Amortization		(4,197	)		(3,230	)		(3,911	)
Capitalized software development costs, end of year	$	14,238		$	15,432		$	15,255

ACCRUED COMPENSATION AND BENEFITS (Tables)

12 Months Ended

Jun. 30, 2017

Schedule of Accrued Compensation and Benefits

Accrued compensation and benefits consisted of the following (in thousands):

	June 30,
	2017		2016
Accrued salaries and withholdings	$	123,914	$	114,990
Accrued leave		86,612		85,717
Accrued fringe benefits		29,215		27,655
Total accrued compensation and benefits	$	239,741	$	228,362

OTHER ACCRUED EXPENSES AND CURRENT LIABILITIES (Tables)

12 Months Ended

Jun. 30, 2017

Other Accrued Expenses And Current Liabilities [Abstract]

Schedule of Other Accrued Expenses and Current Liabilities

Other accrued expenses and current liabilities consisted of the following (in thousands):

	June 30,
	2017		2016
Vendor obligations	$	110,541	$	109,671
Deferred revenue		30,277		41,407
Other		29,346		36,501
Total other accrued expenses and current liabilities	$	170,164	$	187,579

LONG TERM DEBT (Tables)

12 Months Ended

Jun. 30, 2017

Long Term Debt [Abstract]

Schedule of Long-term Debt

Long-term debt consisted of the following (in thousands):

	June 30,
	2017			2016
Bank credit facility – term loans	$	978,867		$	1,032,833
Bank credit facility – revolver loans		265,000			440,000
Principal amount of long-term debt		1,243,867			1,472,833
Less unamortized debt issuance costs		(12,304	)		(16,789	)
Total long-term debt		1,231,563			1,456,044
Less current portion		(53,965	)		(53,965	)
Long-term debt, net of current portion	$	1,177,598		$	1,402,079

Cash Flow Hedges

The effect of derivative instruments in the consolidated statements of operations and accumulated other comprehensive loss for the years ended June 30, 2017, 2016 and 2015 is as follows (in thousands):

	Interest Rate Swaps
	2017		2016			2015
Gain (loss) recognized in other comprehensive income	$	6,872	$	(14,859	)	$	(9,422	)
Amounts reclassified to earnings from accumulated other comprehensive loss	$	7,715	$	8,867		$	7,024
Net current period other comprehensive income (loss)	$	14,587	$	(5,992	)	$	(2,398	)

Aggregate Maturities of Long-term Debt

The aggregate maturities of long-term debt at June 30, 2017 are as follows (in thousands):

Year ending June 30,
2018	$	53,965
2019		107,930
2020		1,081,972
Principal amount of long-term debt		1,243,867
Less unamortized debt issuance costs		(12,304	)
Total long-term debt	$	1,231,563

LEASES (Tables)

12 Months Ended

Jun. 30, 2017

Leases [Abstract]

Schedule of Future Minimum Lease Payments Due Under Non-Cancelable Operating Leases

Future minimum lease payments due under non-cancelable leases as of June 30, 2017, are as follows (in thousands):

Year ending June 30:
2018	$	64,115
2019		59,774
2020		45,873
2021		38,845
2022		29,545
Thereafter		75,560
Total minimum lease payments	$	313,712

OTHER LONG-TERM LIABILITIES (Tables)

12 Months Ended

Jun. 30, 2017

Other Liabilities Noncurrent [Abstract]

Schedule of Other Long-Term Liabilities

Other long-term liabilities consisted of the following (in thousands):

	June 30,
	2017		2016
Deferred rent, net of current portion	$	33,284	$	32,907
Interest rate swap agreements		3,110		21,609
Deferred acquisition and contingent consideration		658		18,642
Deferred revenue		6,514		7,234
Accrued post-retirement obligations		6,423		6,569
Long-term incentive compensation		5,605		—
Reserve for unrecognized tax benefits		1,639		249
Other		643		110
Total other long-term liabilities	$	57,876	$	87,320

BUSINESS SEGMENT, CUSTOMER AND GEOGRAPHIC INFORMATION (Tables)

12 Months Ended

Jun. 30, 2017

Segment Reporting [Abstract]

Summarized Financial Information of Reportable Segments

	Domestic Operations		International Operations		Total
	(in thousands)
Year Ended June 30, 2017
Revenue from external customers	$	4,217,488	$	137,129	$	4,354,617
Net income attributable to CACI		150,271		13,400		163,671
Net assets		1,652,736		140,985		1,793,721
Goodwill		2,479,496		97,939		2,577,435
Total long-term assets		2,912,488		118,692		3,031,180
Total assets		3,716,893		194,189		3,911,082
Capital expenditures		41,832		1,436		43,268
Depreciation and amortization		67,042		4,718		71,760

Year Ended June 30, 2016
Revenue from external customers	$	3,593,924	$	150,129	$	3,744,053
Net income attributable to CACI		129,568		13,231		142,799
Net assets		1,476,924		130,389		1,607,313
Goodwill		2,487,148		98,195		2,585,343
Total long-term assets		2,943,896		121,607		3,065,503
Total assets		3,798,013		189,328		3,987,341
Capital expenditures		18,339		2,496		20,835
Depreciation and amortization		60,637		4,115		64,752

Year Ended June 30, 2015
Revenue from external customers	$	3,168,864	$	144,588	$	3,313,452
Net income attributable to CACI		114,658		11,537		126,195
Net assets		1,343,152		137,120		1,480,272
Goodwill		2,108,768		81,048		2,189,816
Total long-term assets		2,473,470		102,450		2,575,920
Total assets		3,055,782		186,248		3,242,030
Capital expenditures		15,324		2,120		17,444
Depreciation and amortization		61,587		4,496		66,083

Schedule of Revenue by Customer Sector

	Year ended June 30,
	2017		%			2016		%			2015		%
Department of Defense	$	2,829,305		65.0	%	$	2,439,329		65.1	%	$	2,217,031		66.9	%
Federal civilian agencies		1,259,212		28.9			1,062,508		28.4			888,191		26.8
Commercial and other		266,100		6.1			242,216		6.5			208,230		6.3
Total revenue	$	4,354,617		100.0	%	$	3,744,053		100.0	%	$	3,313,452		100.0	%

INCOME TAXES (Tables)

12 Months Ended

Jun. 30, 2017

Income Tax Disclosure [Abstract]

Schedule of Income Loss Before Income Tax Expense

The domestic and foreign components of income before provision for income taxes are as follows (in thousands):

	Year ended June 30,
	2017		2016		2015
Domestic	$	231,982	$	207,641	$	187,332
Foreign		16,637		15,971		14,190
Income before income taxes	$	248,619	$	223,612	$	201,522

Schedule of Components of Income Tax Expense

The components of income tax expense are as follows (in thousands):

	Year ended June 30,
	2017			2016			2015
Current:
Federal	$	54,425		$	54,507		$	37,159
State and local		11,334			9,401			8,080
Foreign		4,041			3,337			3,066
Total current		69,800			67,245			48,305
Deferred:
Federal		13,076			11,978			23,261
State and local		2,917			2,028			3,964
Foreign		(845	)		(438	)		(203	)
Total deferred		15,148			13,568			27,022
Total income tax expense	$	84,948		$	80,813		$	75,327

Schedule of Effective Income Tax Rate Reconciliation

Income tax expense differs from the amounts computed by applying the statutory U.S. income tax rate of 35 percent as a result of the following (in thousands):

	Year ended June 30,
	2017			2016			2015
Expected tax expense computed at federal rate	$	87,017		$	78,264		$	70,533
State and local taxes, net of federal benefit		9,263			7,429			7,828
Nonincludible and nondeductible items, net		1,087			2,936			2,166
Effect of foreign tax rates		(2,320	)		(2,308	)		(2,135	)
R&D tax credit		(4,894	)		(135	)		(77	)
Other tax credits		(1,321	)		(1,744	)		(1,261	)
ASU 2016-09 share-based compensation		(1,390	)		(1,061	)		—
Domestic manufacturing deduction and other		(2,494	)		(2,568	)		(1,727	)
Total income tax expense	$	84,948		$	80,813		$	75,327

Schedule of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to deferred taxes are presented below (in thousands):

	June 30,
	2017			2016
Deferred tax assets:
Deferred compensation and post-retirement obligations	$	37,257		$	35,724
Reserves and accruals		40,058			39,903
Stock-based compensation		13,599			9,833
Interest rate swap		—			8,505
Deferred rent		6,091			5,765
Other		2,000			8,353
Total deferred tax assets		99,005			108,083
Deferred tax liabilities:
Goodwill and other intangible assets		(337,849	)		(320,811	)
Unbilled revenue		(20,913	)		(18,740	)
Prepaid expenses		(4,554	)		(8,308	)
Interest rate swap		(963	)		—
Other		(8,046	)		(8,682	)
Total deferred tax liabilities		(372,325	)		(356,541	)
Net deferred tax liability	$	(273,320	)	$	(248,458	)

Schedule of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized benefits is shown in the table below (in thousands):

	Year ended June 30,
	2017			2016			2015
Beginning of year	$	398		$	6,220		$	9,636
Additions based on current year tax positions		1,475			89			1,468
Reductions based on changes to prior year tax positions		—			—			(3,522	)
Lapse of statute of limitations		(234	)		(128	)		(1,344	)
Settlement with taxing authorities		—			(5,783	)		(18	)
End of year	$	1,639		$	398		$	6,220

STOCK PLANS AND STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Jun. 30, 2017

Share Based Compensation Allocation And Classification In Financial Statements [Abstract]

Components of Stock-Based Compensation Expense and Related Tax Benefits

A summary of the components of stock-based compensation expense recognized during the years ended June 30, 2017, 2016, and 2015, together with the income tax benefits realized, is as follows (in thousands):

	Year ended June 30,
	2017		2016		2015
Stock-based compensation included in indirect costs and selling expense:
Restricted stock and RSU expense	$	21,945	$	17,919	$	14,072
Income tax benefit recognized for stock-based compensation expense	$	7,498	$	6,476	$	5,260

Summary of Activity Related to SSARs and Stock Options

Activity for all outstanding SSARs and stock options, and the corresponding exercise price and fair value information, for the years ended June 30, 2017, 2016, and 2015, is as follows:

	Number of Shares			Exercise Price		Weighted Average Exercise Price		Weighted Average Grant Date Fair Value
Outstanding, June 30, 2014		91,950		37.67 – 59.30			48.77		17.02
Exercisable, June 30, 2014		91,950		37.67 – 59.30			48.77		17.02
Exercised		(44,290	)	37.67 – 59.30			49.36		17.33
Forfeited		—			—		—		—
Expired		(5,000	)		47.59		47.59		10.68
Outstanding, June 30, 2015		42,660		37.67 – 49.36			48.29		17.45
Exercisable, June 30, 2015		42,660		37.67 – 49.36			48.29	$	17.45
Exercised		(35,860	)	37.67 – 49.36			48.18		17.25
Forfeited		—			—		—		—
Expired		(6,800	)		48.83		48.83		18.50
Outstanding, June 30, 2016		—			—		—		—
Exercisable, June 30, 2016		—			—	$	—	$	—
Exercised		—			—		—		—
Forfeited		—			—		—		—
Expired		—			—		—		—
Outstanding, June 30, 2017		—			—		—		—
Exercisable, June 30, 2017		—			—	$	—	$	—

Summary of Activity Related to Restricted Stock and RSUs

Changes in the number of unvested restricted stock and RSUs during each of the years in the three-year period ended June 30, 2017, 2016, and 2015, together with the corresponding weighted-average fair values, are as follows:

	Restricted Stock and Restricted Stock Units
	Number of Shares			Weighted Average Grant Date Fair Value
Unvested at June 30, 2014		838,242		$	55.39
Granted		322,121			76.37
Vested		(250,613	)		47.84
Forfeited		(45,184	)		66.89
Unvested at June 30, 2015		864,566			64.79
Granted		275,117		$	80.72
Vested		(209,448	)		49.48
Forfeited		(56,381	)		75.79
Unvested at June 30, 2016		873,854		$	71.20
Granted		256,853			104.45
Vested		(233,296	)		65.07
Forfeited		(62,804	)		93.12
Unvested at June 30, 2017		834,607		$	85.28

Additional Information Related to SSARs and Stock Options

Information regarding the cash proceeds received, and the intrinsic value and total tax benefits realized resulting from SSARs and stock option exercises is as follows (in thousands):

	Year ended June 30,
	2017		2016		2015
Cash proceeds received	$	—	$	—	$	872
Intrinsic value realized	$	—	$	1,286	$	1,646
Income tax benefit realized	$	—	$	465	$	615

Summary of Activity Related to MSPP

Activity related to the MSPP during the year ended June 30, 2017 is as follows:

	MSPP
RSUs outstanding, June 30, 2016		1,393
Granted		1,978
Issued		(204	)
Forfeited		—
RSUs outstanding, June 30, 2017		3,167
Weighted average grant date fair value as adjusted for the applicable discount	$	81.02

FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

12 Months Ended

Jun. 30, 2017

Fair Value Disclosures [Abstract]

Recurring Fair Value Measurements

The following table summarizes the financial assets and liabilities measured at fair value on a recurring basis as of June 30, 2017 and June 30, 2016, and the level they fall within the fair value hierarchy (in thousands):

			As of June 30,
	Financial Statement	Fair Value	2017		2016
Description of Financial Instrument	Classification	Hierarchy	Fair Value
Contingent consideration	Other accrued expenses and current liabilities	Level 3	$	14,889	$	—
Contingent consideration	Other long-term liabilities	Level 3	$	658	$	15,171
Interest rate swap agreements	Other long-term assets	Level 2	$	5,559	$	—
Interest rate swap agreements	Other accrued expenses and current liabilities	Level 2	$	3	$	—
Interest rate swap agreements	Other long-term liabilities	Level 2	$	3,110	$	21,609

EARNINGS PER SHARE (Tables)

12 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Calculation of basic and diluted earnings per share

Earnings per share and the weighted-average number of diluted shares are computed as follows (in thousands, except per share data):

	Year ended June 30,
	2017		2016		2015
Net income attributable to CACI	$	163,671	$	142,799	$	126,195
Weighted-average number of basic shares outstanding during the period		24,401		24,262		23,948
Dilutive effect of SSARs/stock options and RSUs/restricted shares after application of treasury stock method		668		540		384
Dilutive effect of the warrants		—		—		56
Weighted-average number of diluted shares outstanding during the period		25,069		24,802		24,388
Basic earnings per share	$	6.71	$	5.89	$	5.27
Diluted earnings per share	$	6.53	$	5.76	$	5.17

QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Jun. 30, 2017

Quarterly Financial Data [Abstract]

Schedule of Quarterly Condensed Financial Operating Results

Quarterly condensed financial operating results of the Company for the years ended June 30, 2017 and 2016, are presented below (in thousands except per share data).

	Year ended June 30, 2017
	First		Second		Third		Fourth
Revenue	$	1,073,280	$	1,057,530	$	1,086,418	$	1,137,389
Income from operations	$	69,658	$	80,255	$	67,254	$	80,094
Net income attributable to CACI	$	36,663	$	42,420	$	40,357	$	44,231
Basic earnings per share	$	1.51	$	1.74	$	1.65	$	1.81
Diluted earnings per share	$	1.47	$	1.69	$	1.61	$	1.76
Weighted-average shares outstanding:
Basic		24,340		24,387		24,419		24,459
Diluted		24,928		25,069		25,106		25,172

	Year ended June 30, 2016
	First		Second		Third		Fourth
Revenue	$	822,442	$	830,437	$	977,274	$	1,113,900
Income from operations	$	64,508	$	55,482	$	63,676	$	81,084
Net income attributable to CACI	$	34,632	$	30,452	$	34,116	$	43,599
Basic earnings per share	$	1.43	$	1.26	$	1.41	$	1.79
Diluted earnings per share	$	1.40	$	1.23	$	1.38	$	1.75
Weighted-average shares outstanding:
Basic		24,208		24,246		24,277		24,319
Diluted		24,721		24,786		24,801		24,900

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Summary Of Significant Accounting Policies [Line Items]
U.S. Government Contracts as a percent of total revenue	93.90%	93.50%
Amount of tax expense for changes in the fair value of interest rate swap agreements	$ 9.5	$ 3.9	$ 1.6
Accumulated other comprehensive loss related to foreign currency translation adjustments	(29.5)	(26.7)
Accumulated other comprehensive gain (loss) related to fair value of interest rate swaps	1.5	(13.1)
Accumulated other comprehensive loss related to unrecognized post-retirement medical plan costs	$ (1.1)	$ (1.3)
Equipment and furniture
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	from three to eight years
Leasehold improvements
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	over the remaining lease term or the useful life of the improvements, whichever is shorter

ACQUISITIONS (Detail Textual) - USD ($) $ in Thousands			12 Months Ended
ACQUISITIONS (Detail Textual) - USD ($) $ in Thousands	Oct. 01, 2016	Feb. 01, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Proceeds from revolver borrowings			$ 485,500	$ 1,058,500	$ 438,969
Goodwill			$ 2,577,435	2,585,343	2,189,816
Customer contracts and related customer relationships
Business Acquisition [Line Items]
Amortization period of acquired intangible assets			14 years 1 month 6 days
Revolving Credit Facility
Business Acquisition [Line Items]
Proceeds from revolver borrowings		$ 250,000
Term loans
Business Acquisition [Line Items]
Proceeds from term loan borrowings		300,000
Business in United Kingdom
Business Acquisition [Line Items]
Business purchase consideration	$ 2,800
NSS Acquisition
Business Acquisition [Line Items]
Business purchase consideration		$ 541,900
Percentage of outstanding shares acquired		100.00%
Cash consideration		$ 550,000
Consideration, initial net working capital payment		11,200
Consideration, net working capital refund received		13,600
Consideration, refund for tax-related adjustments		5,700
Goodwill		360,230
Amount of tax deductible goodwill and intangibles		$ 47,700
Goodwill impairment expense				$ 476,200	$ 158,700
NSS Acquisition \| Customer contracts and related customer relationships
Business Acquisition [Line Items]
Amortization period of acquired intangible assets		15 years
NSS Acquisition \| Revolving Credit Facility
Business Acquisition [Line Items]
Proceeds from revolver borrowings		$ 250,000
NSS Acquisition \| Term loans
Business Acquisition [Line Items]
Proceeds from term loan borrowings		$ 300,000

ACQUISITIONS - Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016	Feb. 01, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Goodwill	$ 2,577,435	$ 2,585,343		$ 2,189,816
NSS Acquisition
Business Acquisition [Line Items]
Cash and cash equivalents			$ 2,596
Accounts receivable			210,459
Prepaid expenses and other current assets			14,461
Property and equipment			21,320
Intangible assets, other than goodwill			110,500
Goodwill			360,230
Other long-term assets			437
Accounts payable			(57,616)
Accrued compensation and benefits			(38,953)
Accrued expenses and other current liabilities			(38,432)
Deferred income taxes			(37,796)
Other long-term liabilities			(5,343)
Total consideration			$ 541,863

ACQUISITIONS (Detail Textual 1) - USD ($) $ in Thousands	3 Months Ended								5 Months Ended	12 Months Ended
ACQUISITIONS (Detail Textual 1) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Revenue	$ 1,137,389	$ 1,086,418	$ 1,057,530	$ 1,073,280	$ 1,113,900	$ 977,274	$ 830,437	$ 822,442		$ 4,354,617	$ 3,744,053	$ 3,313,452
Net income	$ 44,231	$ 40,357	$ 42,420	$ 36,663	$ 43,599	$ 34,116	$ 30,452	$ 34,632		163,671	142,799	126,195
Amortization expense										$ 40,700	38,000	$ 39,500
NSS Acquisition
Business Acquisition [Line Items]
Revenue									$ 427,200
Net income									18,800
Acquisition-related expenses											$ 7,300
Integration and restructuring costs									3,900
NSS Acquisition \| Customer contracts and related customer relationships
Business Acquisition [Line Items]
Amortization expense									$ 4,200

ACQUISITIONS - Unaudited Pro Forma Financial Information (Detail 1) - NSS Acquisition - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Revenue	$ 4,418,997	$ 4,401,345
Net income (loss)	$ (300,363)	$ (15,480)
Basic earnings (loss) per share (in dollars per share)	$ (12.38)	$ (0.65)
Diluted earnings (loss) per share (in dollars per share)	$ (12.38)	$ (0.65)

ACQUISITIONS (Detail Textual 2) - USD ($) $ in Thousands	12 Months Ended
ACQUISITIONS (Detail Textual 2) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2017	Mar. 01, 2016	Dec. 04, 2015	Jul. 01, 2015	Jun. 30, 2015
Business Acquisition [Line Items]
Aggregate goodwill arising from other acquisitions	$ 2,585,343	$ 2,577,435				$ 2,189,816
Rockshore Group Ltd (Rockshore)
Business Acquisition [Line Items]
Percentage of outstanding shares acquired					100.00%
Business in United States
Business Acquisition [Line Items]
Percentage of outstanding shares acquired				100.00%
Purple Secure Systems Limited
Business Acquisition [Line Items]
Percentage of outstanding shares acquired			100.00%
Stream:20 Limited
Business Acquisition [Line Items]
Percentage of outstanding shares acquired			100.00%
Combined Business Acquisitions
Business Acquisition [Line Items]
Combined purchase consideration	55,600
Cash consideration	31,800
Deferred consideration	8,400
Contingent consideration	15,400
Aggregate goodwill arising from other acquisitions	40,600
Aggregate intangible assets arising from other acquisitions	$ 8,200

ACQUISITIONS (Detail Textual 3) $ in Thousands	Apr. 01, 2015 USD ($) Associate	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
Business Acquisition [Line Items]
Goodwill		$ 2,577,435	$ 2,585,343	$ 2,189,816
LTC Engineering Associates, Inc. (LTC)
Business Acquisition [Line Items]
Percentage of outstanding shares acquired	100.00%
Purchase price	$ 16,000
Number of associates \| Associate	50
Goodwill	$ 8,900
Intangible assets	$ 4,800

CASH AND CASH EQUIVALENTS - Schedule of cash and cash equivalents (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Cash And Cash Equivalents [Abstract]
Cash	$ 65,091	$ 45,117
Money market funds	448	3,965
Total cash and cash equivalents	$ 65,539	$ 49,082	$ 35,364	$ 64,461

ACCOUNTS RECEIVABLE (Detail Textual) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016
Accounts Receivable Net [Abstract]
Allowance for doubtful accounts receivable	$ 3.6	$ 3.0

ACCOUNTS RECEIVABLE - Schedule of Total Accounts Receivable (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Accounts Receivable Net [Abstract]
Billed receivables	$ 546,041	$ 599,206
Billable receivables at end of period	179,350	172,585
Unbilled receivables pending receipt of contractual documents authorizing billing	31,950	32,026
Total accounts receivable, current	757,341	803,817
Unbilled receivables, retainages and fee withholdings expected to be billed beyond the next 12 months	7,886	8,330
Total accounts receivable	$ 765,227	$ 812,147

GOODWILL - Rollforward of Goodwill (Detail) - USD ($)
$ in Thousands

12 Months Ended

Jun. 30, 2017

Jun. 30, 2016

Goodwill [Roll Forward]

Balance

$ 2,585,343

$ 2,189,816

Goodwill acquired

^[1]

(5,432)

408,319

Foreign currency translation

(2,476)

(12,792)

Balance

2,577,435

2,585,343

Domestic

Goodwill [Roll Forward]

Balance

2,487,148

2,108,768

Goodwill acquired

^[1]

(7,652)

378,380

Balance

2,479,496

2,487,148

International

Goodwill [Roll Forward]

Balance

98,195

81,048

Goodwill acquired

^[1]

2,220

29,939

Foreign currency translation

(2,476)

(12,792)

Balance

$ 97,939

$ 98,195

[1]	Includes goodwill initially allocated to new business acquisitions as well as purchase accounting adjustments.

INTANGIBLE ASSETS - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 669,248	$ 668,772
Accumulated amortization	(433,877)	(393,400)
Total intangible assets, net	235,371	275,372
Customer contracts and related customer relationships
Finite Lived Intangible Assets [Line Items]
Intangible assets	635,895	635,826
Accumulated amortization	(402,934)	(363,412)
Acquired technologies
Finite Lived Intangible Assets [Line Items]
Intangible assets	28,503	28,074
Accumulated amortization	(26,542)	(25,693)
Covenants not to compete
Finite Lived Intangible Assets [Line Items]
Intangible assets	3,305	3,321
Accumulated amortization	(3,288)	(3,245)
Other
Finite Lived Intangible Assets [Line Items]
Intangible assets	1,545	1,551
Accumulated amortization	$ (1,113)	$ (1,050)

INTANGIBLE ASSETS (Detail Textual) - USD ($) $ in Millions	12 Months Ended
INTANGIBLE ASSETS (Detail Textual) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Finite Lived Intangible Assets [Line Items]
Amortization expense	$ 40.7	$ 38.0	$ 39.5
Minimum
Finite Lived Intangible Assets [Line Items]
Intangible asset amortization period	1 year
Maximum
Finite Lived Intangible Assets [Line Items]
Intangible asset amortization period	15 years
Customer contracts and related customer relationships
Finite Lived Intangible Assets [Line Items]
Weighted-average amortization period	14 years 1 month 6 days
Weighted-average remaining amortization period	11 years 2 months 12 days
Acquired technologies
Finite Lived Intangible Assets [Line Items]
Weighted-average amortization period	9 years 6 months
Weighted-average remaining amortization period	6 years 1 month 6 days

INTANGIBLE ASSETS - Expected Amortization Expense (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Finite Lived Intangible Assets Net [Abstract]
Year ending June 30, 2018	$ 36,271
Year ending June 30, 2019	31,602
Year ending June 30, 2020	27,130
Year ending June 30, 2021	23,932
Year ending June 30, 2022	20,640
Thereafter	95,796
Total intangible assets, net	$ 235,371	$ 275,372

PROPERTY AND EQUIPMENT - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Property Plant And Equipment [Abstract]
Equipment and furniture	$ 138,742	$ 126,437
Leasehold improvements	94,643	92,103
Property and equipment, at cost	233,385	218,540
Less accumulated depreciation and amortization	(141,636)	(137,178)
Total property and equipment, net	$ 91,749	$ 81,362

PROPERTY AND EQUIPMENT (Detail Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Property Plant And Equipment [Abstract]
Depreciation expense	$ 27.5	$ 23.6	$ 22.7

CAPITALIZED EXTERNAL SOFTWARE DEVELOPMENT COSTS - Summary of Changes in Capitalized External Software Development Costs (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Movement in Capitalized Computer Software, Net [Roll Forward]
Capitalized software development costs, beginning of year	$ 15,432	$ 15,255	$ 16,594
Costs capitalized	3,003	3,407	2,572
Amortization	(4,197)	(3,230)	(3,911)
Capitalized software development costs, end of year	$ 14,238	$ 15,432	$ 15,255

ACCRUED COMPENSATION AND BENEFITS - Schedule of Accrued Compensation and Benefits (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Employee Related Liabilities Current [Abstract]
Accrued salaries and withholdings	$ 123,914	$ 114,990
Accrued leave	86,612	85,717
Accrued fringe benefits	29,215	27,655
Total accrued compensation and benefits	$ 239,741	$ 228,362

OTHER ACCRUED EXPENSES AND CURRENT LIABILITIES - Schedule of Other Accrued Expenses and Current Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Other Accrued Expenses And Current Liabilities [Abstract]
Vendor obligations	$ 110,541	$ 109,671
Deferred revenue	30,277	41,407
Other	29,346	36,501
Total other accrued expenses and current liabilities	$ 170,164	$ 187,579

- Definition

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

+ References + Details

LONG TERM DEBT - Schedule of Long-term Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Debt Instrument [Line Items]
Principal amount of long-term debt	$ 1,243,867	$ 1,472,833
Less unamortized debt issuance costs	(12,304)	(16,789)
Total long-term debt	1,231,563	1,456,044
Less current portion	(53,965)	(53,965)
Long-term debt, net of current portion	1,177,598	1,402,079
Bank credit facility - term loans
Debt Instrument [Line Items]
Principal amount of long-term debt	978,867	1,032,833
Bank credit facility - revolver loans
Debt Instrument [Line Items]
Principal amount of long-term debt	$ 265,000	$ 440,000

LONG TERM DEBT (Detail Textual) - USD ($)		12 Months Ended
LONG TERM DEBT (Detail Textual) - USD ($)	Feb. 01, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Debt Instrument [Line Items]
Proceeds from revolver borrowings		$ 485,500,000	$ 1,058,500,000	$ 438,969,000
Outstanding amount under Credit Facility		1,243,867,000	1,472,833,000
Interest Rate Swap \| Cash Flow Hedging
Debt Instrument [Line Items]
Aggregate notional amount		900,000,000
Bank Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 1,981,300,000
Credit facility borrowing capacity, description		At any time and so long as no default has occurred, the Company has the right to increase the Revolving Facility or the Term Loan in an aggregate principal amount of up to the greater of $400.0 million or an amount subject to 2.75 times senior secured leverage, calculated assuming the Revolving Facility is fully drawn, with applicable lender approvals.
Credit Facility optional increases to borrowing capacity		$ 400,000,000
Ratio that restricts optional increases to borrowing capacity		275.00%
Outstanding borrowings interest rate		3.25%
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 850,000,000
Proceeds from revolver borrowings	$ 250,000,000
Outstanding amount under Credit Facility		265,000,000	440,000,000
Term loans
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		1,131,300,000
Proceeds from term loan borrowings	$ 300,000,000
Outstanding amount under Credit Facility		$ 978,867,000	$ 1,032,833,000
Term loan period		5 years
Loan maturity date		Jun. 01, 2020
Term loan frequency of payment		quarterly
Term loans \| Principal Payment Through June 30, 2018
Debt Instrument [Line Items]
Term loan principal payment		$ 13,500,000
Term loans \| Principal Payment Thereafter June 30, 2018
Debt Instrument [Line Items]
Term loan principal payment		27,000,000
Same-Day Swing Line Loan Revolving Credit Sub Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		100,000,000
Outstanding amount under Credit Facility		0
Stand-By Letters Of Credit Revolving Credit Sub Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		25,000,000
Outstanding Letters of Credit		$ 400,000

LONG TERM DEBT - Cash Flow Hedges (Detail 2) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Long Term Debt [Abstract]
Gain (loss) recognized in other comprehensive income	$ 6,872	$ (14,859)	$ (9,422)
Amounts reclassified to earnings from accumulated other comprehensive loss	7,715	8,867	7,024
Net current period other comprehensive income (loss)	$ 14,587	$ (5,992)	$ (2,398)

LONG TERM DEBT - Aggregate Maturities of Long-Term Debt (Detail 3) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Long Term Debt [Abstract]
2018	$ 53,965
2019	107,930
2020	1,081,972
Principal amount of long-term debt	1,243,867	$ 1,472,833
Less unamortized debt issuance costs	(12,304)	(16,789)
Total long-term debt	$ 1,231,563	$ 1,456,044

LEASES (Detail Textual) - USD ($) $ in Millions	12 Months Ended
LEASES (Detail Textual) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Leases [Abstract]
Operating leases, term of contract	13 years
Net sublease rental income	$ 8.7
Operating lease rent expense	$ 76.2	$ 62.8	$ 54.6

LEASES - Schedule of Future Minimum Lease Payments Due Under Non-Cancelable Operating Leases (Detail) $ in Thousands	Jun. 30, 2017 USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2018	$ 64,115
2019	59,774
2020	45,873
2021	38,845
2022	29,545
Thereafter	75,560
Total minimum lease payments	$ 313,712

OTHER LONG-TERM LIABILITIES - Schedule of Other Long-Term Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Other Liabilities Noncurrent [Abstract]
Deferred rent, net of current portion	$ 33,284	$ 32,907
Interest rate swap agreements	3,110	21,609
Deferred acquisition and contingent consideration	658	18,642
Deferred revenue	6,514	7,234
Accrued post-retirement obligations	6,423	6,569
Long-term incentive compensation	5,605
Reserve for unrecognized tax benefits	1,639	249
Other	643	110
Total other long-term liabilities	$ 57,876	$ 87,320

OTHER LONG-TERM LIABILITIES (Detail Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Other Liabilities Noncurrent [Abstract]
Net periodic post-retirement benefit cost	$ 0.4	$ 0.4

BUSINESS SEGMENT, CUSTOMER AND GEOGRAPHIC INFORMATION (Detail Textual) - Segment	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Revenue, Major Customer [Line Items]
Number of reportable segments	2
U.S. Government \| Sales
Revenue, Major Customer [Line Items]
Percentage of revenue	93.90%	93.50%	93.70%

BUSINESS SEGMENT, CUSTOMER AND GEOGRAPHIC INFORMATION - Summarized Financial Information of Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Revenue from external customers	$ 1,137,389	$ 1,086,418	$ 1,057,530	$ 1,073,280	$ 1,113,900	$ 977,274	$ 830,437	$ 822,442	$ 4,354,617	$ 3,744,053	$ 3,313,452
Net income attributable to CACI	44,231	$ 40,357	$ 42,420	$ 36,663	43,599	$ 34,116	$ 30,452	$ 34,632	163,671	142,799	126,195
Net assets	1,793,721				1,607,313				1,793,721	1,607,313	1,480,272	$ 1,359,166
Goodwill	2,577,435				2,585,343				2,577,435	2,585,343	2,189,816
Total long-term assets	3,031,180				3,065,503				3,031,180	3,065,503	2,575,920
Total assets	3,911,082				3,987,341				3,911,082	3,987,341	3,242,030
Capital expenditures									43,268	20,835	17,444
Depreciation and amortization									71,760	64,752	66,083
Domestic Operations
Segment Reporting Information [Line Items]
Revenue from external customers									4,217,488	3,593,924	3,168,864
Net income attributable to CACI									150,271	129,568	114,658
Net assets	1,652,736				1,476,924				1,652,736	1,476,924	1,343,152
Goodwill	2,479,496				2,487,148				2,479,496	2,487,148	2,108,768
Total long-term assets	2,912,488				2,943,896				2,912,488	2,943,896	2,473,470
Total assets	3,716,893				3,798,013				3,716,893	3,798,013	3,055,782
Capital expenditures									41,832	18,339	15,324
Depreciation and amortization									67,042	60,637	61,587
International Operations
Segment Reporting Information [Line Items]
Revenue from external customers									137,129	150,129	144,588
Net income attributable to CACI									13,400	13,231	11,537
Net assets	140,985				130,389				140,985	130,389	137,120
Goodwill	97,939				98,195				97,939	98,195	81,048
Total long-term assets	118,692				121,607				118,692	121,607	102,450
Total assets	$ 194,189				$ 189,328				194,189	189,328	186,248
Capital expenditures									1,436	2,496	2,120
Depreciation and amortization									$ 4,718	$ 4,115	$ 4,496

BUSINESS SEGMENT, CUSTOMER AND GEOGRAPHIC INFORMATION - Revenue by Customer Sector (Detail 1) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Revenue, Major Customer [Line Items]
Revenue	$ 1,137,389	$ 1,086,418	$ 1,057,530	$ 1,073,280	$ 1,113,900	$ 977,274	$ 830,437	$ 822,442	$ 4,354,617	$ 3,744,053	$ 3,313,452
Customer Information \| Sales
Revenue, Major Customer [Line Items]
Revenue									$ 4,354,617	$ 3,744,053	$ 3,313,452
Percentage of revenue									100.00%	100.00%	100.00%
Customer Information \| Department of Defense \| Sales
Revenue, Major Customer [Line Items]
Revenue									$ 2,829,305	$ 2,439,329	$ 2,217,031
Percentage of revenue									65.00%	65.10%	66.90%
Customer Information \| Federal civilian agencies \| Sales
Revenue, Major Customer [Line Items]
Revenue									$ 1,259,212	$ 1,062,508	$ 888,191
Percentage of revenue									28.90%	28.40%	26.80%
Customer Information \| Commercial and other \| Sales
Revenue, Major Customer [Line Items]
Revenue									$ 266,100	$ 242,216	$ 208,230
Percentage of revenue									6.10%	6.50%	6.30%

INVESTMENTS IN JOINT VENTURES (Detail Textual) - AC FIRST LLC	1 Months Ended
	Jul. 31, 2009	Jun. 30, 2016
Schedule of Equity Method Investments [Line Items]
CACI's percentage of ownership interest	49.00%
JV partner's percentage of ownership interest	51.00%
Percentage of investment distributed		90.00%
Percentage of investment remaining to be distributed		10.00%

OTHER COMMITMENTS AND CONTINGENCIES (Detail Textual) - Government Contracting	Jun. 30, 2017 USD ($)
Minimum
Loss Contingencies [Line Items]
Estimated amount of possible loss	$ 0
Maximum
Loss Contingencies [Line Items]
Estimated amount of possible loss	$ 3,900,000

INCOME TAXES - Schedule of Income Loss Before Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Domestic	$ 231,982	$ 207,641	$ 187,332
Foreign	16,637	15,971	14,190
Income before income taxes	$ 248,619	$ 223,612	$ 201,522

INCOME TAXES - Schedule of Components of Income Tax Expense (Detail 1) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Current:
Federal	$ 54,425	$ 54,507	$ 37,159
State and local	11,334	9,401	8,080
Foreign	4,041	3,337	3,066
Total current	69,800	67,245	48,305
Deferred:
Federal	13,076	11,978	23,261
State and local	2,917	2,028	3,964
Foreign	(845)	(438)	(203)
Total deferred	15,148	13,568	27,022
Total income tax expense	$ 84,948	$ 80,813	$ 75,327

INCOME TAXES (Detail Textual) - USD ($) $ in Thousands	12 Months Ended
INCOME TAXES (Detail Textual) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Statutory U.S. income tax rate	35.00%
Undistributed earnings	$ 15,700
Liability for unrecognized tax benefits	1,639	$ 398	$ 6,220	$ 9,636
Unrecognized tax benefit that would impact the company's effective tax rate	$ 1,600	$ 400	$ 1,300

INCOME TAXES - Schedule of Effective Income Tax Rate Reconciliation (Detail 2) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Expected tax expense computed at federal rate	$ 87,017	$ 78,264	$ 70,533
State and local taxes, net of federal benefit	9,263	7,429	7,828
Nonincludible and nondeductible items, net	1,087	2,936	2,166
Effect of foreign tax rates	(2,320)	(2,308)	(2,135)
R&D tax credit	(4,894)	(135)	(77)
Other tax credits	(1,321)	(1,744)	(1,261)
ASU 2016-09 share-based compensation	(1,390)	(1,061)
Domestic manufacturing deduction and other	(2,494)	(2,568)	(1,727)
Total income tax expense	$ 84,948	$ 80,813	$ 75,327

INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Detail 3) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Deferred tax assets:
Deferred compensation and post-retirement obligations	$ 37,257	$ 35,724
Reserves and accruals	40,058	39,903
Stock-based compensation	13,599	9,833
Interest rate swap		8,505
Deferred rent	6,091	5,765
Other	2,000	8,353
Total deferred tax assets	99,005	108,083
Deferred tax liabilities:
Goodwill and other intangible assets	(337,849)	(320,811)
Unbilled revenue	(20,913)	(18,740)
Prepaid expenses	(4,554)	(8,308)
Interest rate swap	(963)
Other	(8,046)	(8,682)
Total deferred tax liabilities	(372,325)	(356,541)
Net deferred tax liability	$ (273,320)	$ (248,458)

INCOME TAXES - Schedule of Unrecognized Tax Benefits (Detail 4) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning of year	$ 398	$ 6,220	$ 9,636
Additions based on current year tax positions	1,475	89	1,468
Reductions based on changes to prior year tax positions			(3,522)
Lapse of statute of limitations	(234)	(128)	(1,344)
Settlement with taxing authorities		(5,783)	(18)
End of year	$ 1,639	$ 398	$ 6,220

RETIREMENT SAVINGS PLANS (Detail Textual) - USD ($)	12 Months Ended
RETIREMENT SAVINGS PLANS (Detail Textual) - USD ($)	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Supplemental Savings Plan
Defined Contribution Plan Disclosure [Line Items]
Employee contribution, maximum percentage of compensation	50.00%
Contribution expense	$ 700,000	$ 500,000	$ 500,000
Employee contribution maximum, percentage of bonuses	100.00%
Employer contribution percentage	5.00%
Employer contribution vesting period	5 years
Annual IRC compensation limit	$ 270,000
Supplemental savings plan obligation	87,900,000
Supplemental savings plan obligation, current portion	6,100,000
Change in supplemental savings plan obligation	4,000,000
Supplemental Savings Plan investment gains	4,800,000
Supplemental Savings Plan participant compensation deferral	8,700,000
Company contributions	600,000
Distributions paid to participants	10,100,000
Supplemental Savings Plan COLI gains	4,600,000	1,800,000
COLI portion of supplemental savings plan assets	91,400,000	88,800,000
International Operations Defined Contribution Plans
Defined Contribution Plan Disclosure [Line Items]
Contribution expense	$ 1,500,000	1,400,000	1,100,000
401 (k) Plan
Defined Contribution Plan Disclosure [Line Items]
Employee contribution, maximum percentage of compensation	75.00%
Employer matching contribution, percent of match	6.00%
Employer matching contribution, percent of employee salary deferral	50.00%
Contribution expense	$ 24,000,000	25,500,000	22,500,000
Employer contribution vesting period	3 years
401(k) profit-sharing plans (PSP)
Defined Contribution Plan Disclosure [Line Items]
Discretionary contribution expense	$ 22,800,000	$ 20,600,000	$ 18,000,000

STOCK PLANS AND STOCK-BASED COMPENSATION - Components of Stock-Based Compensation Expense and Related Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Stock-based compensation included in indirect costs and selling expense:
Restricted stock and RSU expense	$ 21,945	$ 17,919	$ 14,072
Income tax benefit recognized for stock-based compensation expense	$ 7,498	$ 6,476	$ 5,260

STOCK PLANS AND STOCK-BASED COMPENSATION (Detail Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Excess tax benefits recognized	$ 1.6	$ 1.2	$ 3.5
PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period to establish average share price for performance measurement	90 days
Percentage of earned award vesting after three years	50.00%
Percentage of earned award vesting after four years	50.00%
PRSUs \| September 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
PRSUs granted	180,570
Additional PRSUs earned pursuant to condition	26,957
PRSUs \| September 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
PRSUs granted	208,160
Additional PRSUs earned pursuant to condition	11,811
PRSUs \| September 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
PRSUs granted	193,420
Potential additional PRSUs to be earned pursuant to condition	193,420
2006 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock incentive plan, expiration period	10 years
2016 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for grants	1,200,000
Cumulative equity instruments awarded	41,756
Cumulative equity instruments forfeited	52,169

STOCK PLANS AND STOCK-BASED COMPENSATION (Detail Textual 1) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Tax benefit realized	$ 7,498	$ 6,476	$ 5,260
ESPP Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for grants	1,250,000
Percentage of fair market value	95.00%
Maximum number of shares that an eligible employee can purchase	The maximum number of shares that an eligible employee can purchase during any quarter is equal to two times an amount determined as follows: 20 percent of such employee’s compensation over the quarter, divided by 95 percent of the fair market value of a share of common stock on the last day of the quarter.
Cumulative shares purchased under ESPP Plan	1,112,695
Cumulative weighted-average purchase price per share	$ 51.65
Shares purchased under ESPP Plan	40,989
Weighted-average price per share	$ 101.25
MSPP Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for grants	500,000
Percentage of annual bonus in lieu of which RSU received	85.00%	85.00%	85.00%
MSPP Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of annual bonus in lieu of which RSU received	100.00%
DSPP Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for grants	75,000
Percentage of annual retainer fees in lieu of which RSU received	100.00%
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Weighted-average fair value of RSUs granted	$ 104.45	$ 80.72	$ 76.37
Total intrinsic value of RSUs that vested	$ 26,600	$ 18,400	$ 18,600
Tax benefit realized	4,800	$ 3,300	$ 7,000
Unrecognized compensation cost	$ 34,200
Weighted-average period to recognize unrecognized compensation cost (in years)	2 years 7 months 6 days
SSARs and Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	5 years
PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price	$ 0.9656
Risk free rate of return	0.88%
Expected volatility	24.20%

STOCK PLANS AND STOCK-BASED COMPENSATION - Summary of Activity Related to SSARs and Stock Options (Detail 1) - SSARs and Stock Options - $ / shares	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Exercise Price 37.67 - 59.30
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, Minimum		$ 37.67	$ 37.67
Exercise Price, Maximum		$ 59.30	$ 59.30
Number of Shares
Outstanding, Beginning Balance		91,950
Exercisable, Beginning Balance		91,950
Exercised		(44,290)
Outstanding, Ending Balance			91,950
Exercisable, Ending Balance			91,950
Weighted Average Exercise Price
Outstanding, Beginning Balance		$ 48.77
Exercisable, Beginning Balance		48.77
Exercised		49.36
Outstanding, Ending Balance			$ 48.77
Exercisable, Ending Balance			48.77
Weighted Average Grant Date Fair Value
Outstanding, Beginning Balance		17.02
Exercisable, Beginning Balance		17.02
Exercised		17.33
Outstanding, Ending Balance			17.02
Exercisable, Ending Balance			$ 17.02
Exercise Price 47.59
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, Minimum		$ 47.59
Number of Shares
Expired		(5,000)
Weighted Average Exercise Price
Expired		$ 47.59
Weighted Average Grant Date Fair Value
Expired		10.68
Exercise Price 37.67 - 49.36
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, Minimum	$ 37.67	37.67
Exercise Price, Maximum	$ 49.36	$ 49.36
Number of Shares
Outstanding, Beginning Balance	42,660
Exercisable, Beginning Balance	42,660
Exercised	(35,860)
Outstanding, Ending Balance		42,660
Exercisable, Ending Balance		42,660
Weighted Average Exercise Price
Outstanding, Beginning Balance	$ 48.29
Exercisable, Beginning Balance	48.29
Exercised	48.18
Outstanding, Ending Balance		$ 48.29
Exercisable, Ending Balance		48.29
Weighted Average Grant Date Fair Value
Outstanding, Beginning Balance	17.45
Exercisable, Beginning Balance	17.45
Exercised	17.25
Outstanding, Ending Balance		17.45
Exercisable, Ending Balance		$ 17.45
Exercise Price 48.83
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, Minimum	$ 48.83
Number of Shares
Expired	(6,800)
Weighted Average Exercise Price
Expired	$ 48.83
Weighted Average Grant Date Fair Value
Expired	$ 18.50

STOCK PLANS AND STOCK-BASED COMPENSATION - Summary of Activity Related to Restricted Stock and RSUs (Detail 2) - Restricted Stock Units - $ / shares	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Number of Shares
Unvested restricted stock and RSUs Outstanding June 30	873,854	864,566	838,242
Granted	256,853	275,117	322,121
Vested	(233,296)	(209,448)	(250,613)
Forfeited	(62,804)	(56,381)	(45,184)
Unvested restricted stock and RSUs Outstanding June 30	834,607	873,854	864,566
Weighted Average Grant Date Fair Value
Beginning balance unvested, June 30	$ 71.20	$ 64.79	$ 55.39
Granted	104.45	80.72	76.37
Vested	65.07	49.48	47.84
Forfeited	93.12	75.79	66.89
Ending balance unvested, June 30	$ 85.28	$ 71.20	$ 64.79

STOCK PLANS AND STOCK-BASED COMPENSATION - Additional Information Related to SSARs and Stock Options (Detail 3) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options [Abstract]
Cash proceeds received		$ 872
Intrinsic value realized	$ 1,286	1,646
Income tax benefit realized	$ 465	$ 615

STOCK PLANS AND STOCK-BASED COMPENSATION - Summary of Activity Related to MSPP (Detail 4) - MSPP RSUs	12 Months Ended
	Jun. 30, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested restricted stock and RSUs Outstanding June 30	1,393
Granted	1,978
Issued	(204)
Forfeited
Unvested restricted stock and RSUs Outstanding June 30	3,167
Weighted average grant date fair value as adjusted for the applicable discount \| $ / shares	$ 81.02

FAIR VALUE OF FINANCIAL INSTRUMENTS - Recurring Fair Value Measurements (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	$ 3,110	$ 21,609
Fair Value, Measurements, Recurring \| Other accrued expenses and current liabilities \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	14,889
Fair Value, Measurements, Recurring \| Other accrued expenses and current liabilities \| Level 2 \| Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	3
Fair Value, Measurements, Recurring \| Other long-term liabilities \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	658	15,171
Fair Value, Measurements, Recurring \| Other long-term liabilities \| Level 2 \| Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	3,110	$ 21,609
Fair Value, Measurements, Recurring \| Other long-term assets \| Level 2 \| Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	$ 5,559

FAIR VALUE OF FINANCIAL INSTRUMENTS (Detail Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Business combination contingent consideration period	the two and three year periods
Increase in fair value of contingent consideration	$ 0.7	$ 0.7

EARNINGS PER SHARE - Calculation of Basic and Diluted Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Net income attributable to CACI	$ 44,231	$ 40,357	$ 42,420	$ 36,663	$ 43,599	$ 34,116	$ 30,452	$ 34,632	$ 163,671	$ 142,799	$ 126,195
Weighted-average number of basic shares outstanding during the period	24,459	24,419	24,387	24,340	24,319	24,277	24,246	24,208	24,401	24,262	23,948
Dilutive effect of SSARs/stock options and RSUs/restricted shares after application of treasury stock method									668	540	384
Dilutive effect of the warrants											56
Weighted-average number of diluted shares outstanding during the period	25,172	25,106	25,069	24,928	24,900	24,801	24,786	24,721	25,069	24,802	24,388
Basic earnings per share	$ 1.81	$ 1.65	$ 1.74	$ 1.51	$ 1.79	$ 1.41	$ 1.26	$ 1.43	$ 6.71	$ 5.89	$ 5.27
Diluted earnings per share	$ 1.76	$ 1.61	$ 1.69	$ 1.47	$ 1.75	$ 1.38	$ 1.23	$ 1.40	$ 6.53	$ 5.76	$ 5.17

EARNINGS PER SHARE (Detail Textual) - Warrants shares in Millions	12 Months Ended
	Jun. 30, 2015 $ / shares shares
Class of Warrant or Right [Line Items]
Warrant's exercise price \| $ / shares	$ 68.31
Warrants, number of shares issued upon settlement \| shares	0.5

QUARTERLY FINANCIAL DATA (UNAUDITED) - Schedule of Quarterly Condensed Financial Operating Results (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Quarterly Financial Data [Abstract]
Revenue	$ 1,137,389	$ 1,086,418	$ 1,057,530	$ 1,073,280	$ 1,113,900	$ 977,274	$ 830,437	$ 822,442	$ 4,354,617	$ 3,744,053	$ 3,313,452
Income from operations	80,094	67,254	80,255	69,658	81,084	63,676	55,482	64,508	297,261	264,750	236,381
Net income attributable to CACI	$ 44,231	$ 40,357	$ 42,420	$ 36,663	$ 43,599	$ 34,116	$ 30,452	$ 34,632	$ 163,671	$ 142,799	$ 126,195
Basic earnings per share	$ 1.81	$ 1.65	$ 1.74	$ 1.51	$ 1.79	$ 1.41	$ 1.26	$ 1.43	$ 6.71	$ 5.89	$ 5.27
Diluted earnings per share	$ 1.76	$ 1.61	$ 1.69	$ 1.47	$ 1.75	$ 1.38	$ 1.23	$ 1.40	$ 6.53	$ 5.76	$ 5.17
Weighted-average basic shares outstanding	24,459	24,419	24,387	24,340	24,319	24,277	24,246	24,208	24,401	24,262	23,948
Weighted-average diluted shares outstanding	25,172	25,106	25,069	24,928	24,900	24,801	24,786	24,721	25,069	24,802	24,388

VALUATION AND QUALIFYING ACCOUNTS (Detail) - Allowances for doubtful accounts - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 2,997	$ 3,282	$ 3,734
Additions at Cost	1,293	536	800
Deductions	(690)	(497)	(1,055)
Other Changes	(49)	(324)	(197)
Balance at End of Period	$ 3,551	$ 2,997	$ 3,282