Cover	12 Months Ended
Cover	Dec. 31, 2023
Document Information [Line Items]
Document Type	DEF 14A
Amendment Flag	false
Entity Information [Line Items]
Entity Registrant Name	ENTERPRISE FINANCIAL SERVICES CORP
Entity Central Index Key	0001025835

Pay vs Performance Disclosure

12 Months Ended

Dec. 31, 2023

USD ($)

$ / shares

Dec. 31, 2022

USD ($)

$ / shares

Dec. 31, 2021

USD ($)

$ / shares

Dec. 31, 2020

USD ($)

$ / shares

Pay vs Performance Disclosure

Pay vs Performance Disclosure, Table


Year	Summary Compensation Table Total for PEO		Compensation Actually Paid to PEO (1)		Average Summary Compensation Table Total for Non-PEO NEOs		Average Compensation Actually Paid to Non-PEO NEOs (1)		Value of Initial Fixed $100 Investment Based On:				Net Income ($000s)		Diluted Earnings Per Share
Year	Summary Compensation Table Total for PEO		Compensation Actually Paid to PEO (1)		Average Summary Compensation Table Total for Non-PEO NEOs		Average Compensation Actually Paid to Non-PEO NEOs (1)		TSR		Peer Group TSR		Net Income ($000s)		Diluted Earnings Per Share

2023	$	3,445,438	$	2,116,497	$	1,355,463	$	898,728	$	100	$	103	$	194,059	$	5.07
2022	$	4,160,216	$	4,835,417	$	1,766,407	$	1,995,112	$	108	$	111	$	203,043	$	5.31
2021	$	2,450,066	$	3,099,999	$	1,045,830	$	1,276,627	$	102	$	130	$	133,055	$	3.86
2020	$	1,556,996	$	1,165,813	$	776,407	$	621,177	$	74	$	93	$	74,384	$	2.76

Named Executive Officers, Footnote

Our CEO, Mr. Lally, was the Company’s principal executive officer (“PEO”) for each year. NEOs for 2023 include Messrs. Turner, Goodman, Bauche and Ponder. NEOs for 2020-2022 include Messrs. Turner, Goodman and Bauche and Ms. Iannacone.

Peer Group Issuers, Footnote

The peer group is the S&P Regional Banks Select Industry Index.

PEO Total Compensation Amount

$ 3,445,438

$ 4,160,216

$ 2,450,066

$ 1,556,996

PEO Actually Paid Compensation Amount

$ 2,116,497

4,835,417

3,099,999

1,165,813

Adjustment To PEO Compensation, Footnote

Compensation actually paid is detailed in the table below:


Compensation Actually Paid to PEO
	2023		2022		2021		2020
Total compensation in the Summary Compensation Table	$	3,445,438	$	4,160,216	$	2,450,066	$	1,556,996


Deduction for stock award values included in the Summary Compensation Table	(1,272,594)		(2,080,526)		(777,478)		(405,101)
Deduction for stock option values included in the Summary Compensation Table	(382,804)		(299,997)		(221,873)		—
Addition for the fair value as of the end of the year of awards granted during the year that are outstanding and unvested at the end of the year	1,133,826		2,825,436		1,370,239		311,273
Change in fair value as of the end of the year, from the end of the prior year, of any awards granted in any prior year that are outstanding and unvested as of the end of the year	(505,980)		168,262		269,631		(149,253)

Change in fair value as of the vesting date, from the end of the prior year, of awards granted in a prior year that vested in the current year	(301,389)		62,026		87,429		(148,102)
Subtraction for the prior year fair value of awards granted in a prior year that failed to meet the applicable vesting conditions during the year	—		—		(78,015)		—

Compensation Actually Paid	$	2,116,497	$	4,835,417	$	3,099,999	$	1,165,813

Non-PEO NEO Average Total Compensation Amount

$ 1,355,463

1,766,407

1,045,830

776,407

Non-PEO NEO Average Compensation Actually Paid Amount

$ 898,728

1,995,112

1,276,627

621,177

Adjustment to Non-PEO NEO Compensation Footnote

Compensation actually paid is detailed in the table below, continued:


Average Compensation Actually Paid to Non-PEO NEOs
	2023		2022		2021		2020
Total compensation in the Summary Compensation Table	$	1,355,463	$	1,766,407	$	1,045,830	$	776,407


Deduction for stock award values included in the Summary Compensation Table	(406,492)		(904,799)		(270,804)		(141,725)
Deduction for stock option values included in the Summary Compensation Table	(122,279)		(98,125)		(77,282)		—
Addition for the fair value as of the end of the year of awards granted during the year that are outstanding and unvested at the end of the year	362,170		1,151,323		477,273		108,899
Change in fair value as of the end of the year, from the end of the prior year, of any awards granted in any prior year that are outstanding and unvested as of the end of the year	(185,159)		58,608		94,328		(55,701)

Change in fair value as of the vesting date, from the end of the prior year, of awards granted in a prior year that vested in the current year	(104,975)		21,698		34,388		(66,703)
Subtraction for the prior year fair value of awards granted in a prior year that failed to meet the applicable vesting conditions during the year	—		—		(27,106)		—

Compensation Actually Paid	$	898,728	$	1,995,112	$	1,276,627	$	621,177

Compensation Actually Paid vs. Total Shareholder Return

Compensation Actually Paid versus Cumulative TSR

Compensation Actually Paid vs. Net Income

Compensation Actually Paid versus Net Income

Compensation Actually Paid vs. Company Selected Measure

Compensation Actually Paid versus EPS

Total Shareholder Return Vs Peer Group

Compensation Actually Paid versus Cumulative TSR

Tabular List, Table


Important Financial Performance Measures
Earnings per share
Loan growth
Return on average tangible common equity
Nonperforming assets to total assets

Total Shareholder Return Amount

$ 100

108

102

Peer Group Total Shareholder Return Amount

103

111

130

Net Income (Loss)

$ 194,059,000

$ 203,043,000

$ 133,055,000

$ 74,384,000

Company Selected Measure Amount | $ / shares

5.07

5.31

3.86

2.76

PEO Name

Mr. Lally

Additional 402(v) Disclosure

Our pay for performance philosophy results in a significant portion of total compensation for the NEOs being comprised of performance-based awards with both short and long-term targets. The financial performance metrics used in the performance awards are selected by the Compensation Committee to align compensation with shareholder interests and long-term value creation, while ensuring a competitive wage as compared to our peers. This has resulted in a significant level of compensation at-risk for the NEOs. In 2023, our CEOs and other NEOs total compensation included 75% and 65%, respectively, that was at risk.

Compensation actually paid to our NEOs includes the end-of-year fair value of awards granted during the year, changes in the fair value of awards granted in prior fiscal years, and other changes related to forfeited awards, as applicable.

Select items that impacted compensation actually paid and our financial measures in the table and graph above include:

•In 2020, the Company increased its allowance for credit losses due to the heightened risk to the economy and its customers because of the COVID-19 pandemic. The Company also completed an acquisition at the end of 2020, which increased the provision for credit losses and merger expense. These activities resulted in a decline in net income and EPS when compared to 2019. STIP payouts were above target, but below exceptional, and the three-year cumulative LTIP performance payouts were at 119% of target out of a maximum award of 200%. Equity markets were volatile in 2020 due to the pandemic and both the Company’s stock and the peer index had a negative return. The negative total shareholder return in 2020 reduced a portion of the LTIP award that uses this metric in the performance criteria to 29% of the targeted amount.

•In 2021, the Company completed another acquisition that resulted in additional provision for credit losses and merger expenses for the year. The Company also closed certain branch locations and recognized a related impairment charge. In support of its customers, the Company was an active participant in the Paycheck Protection Program that generated additional interest and fee income on loans. The total shareholder return for the both the Company and the peer index rebounded in 2021 with double digit returns. STIP payouts in 2021 were above target but below exceptional levels and the three-year cumulative LTIP performance payouts were at 59% of target out of a maximum award of 200%. No LTIP shares were awarded based on the three-year cumulative total shareholder return in 2021.

•In 2022, rising interest rates benefited the Company’s asset-sensitive balance sheet, resulting in an increase to net income and EPS. The Company’s total shareholder return increased in 2022, while the peer index declined. STIP payouts in 2022 were at the exceptional level and LTIP performance awards were at 132% of the aggregate target level. As noted in the compensation discussion and analysis, the NEOs also received a one-time Special Award in 2022 to increase retention.

•In 2023, net interest income continued to expand due to organic growth and an increase in market interest rates. In the industry, three large regional banks failed at the beginning of the year. The rise in short-term rates and robust deposit competition after the bank failures increased deposit costs. The provision for credit losses increased from a historically low level in 2022 and noninterest expense expanded due to higher deposit servicing costs and employee compensation and benefits. The total shareholder return for both the Company and the peer index were negative in 2023 as a result of the market disruption following the bank failures. STIP payments in 2023 were below the exceptional level due to the decline in EPS in 2023 from 2022. The LTIP performance awards were at 169% of the aggregate target level and were reflective of the three-year cumulative EPS and TSR targets.

Measure:: 1

Pay vs Performance Disclosure

Name

Earnings per share

Measure:: 2

Pay vs Performance Disclosure

Name

Loan growth

Measure:: 3

Pay vs Performance Disclosure

Name

Return on average tangible common equity