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Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2016

Regulated Operations [Abstract]

Schedule of Actual Capital Amounts and Ratios

The actual capital amounts and ratios are presented in the table below:

	Actual							For Capital Adequacy Purposes							To Be Well Capitalized  Under Applicable Action Provisions
($ in thousands)	Amount				Ratio			Amount				Ratio			Amount				Ratio
As of December 31, 2016:
Total Capital (to Risk Weighted Assets)
Enterprise Financial Services Corp	$	506,349			13.48	%		$	300,573			8.00	%		$	—			—	%
Enterprise Bank & Trust	430,981				11.53			298,982				8.00			373,728				10.00
Tier 1 Capital (to Risk Weighted Assets)
Enterprise Financial Services Corp	412,865				10.99			225,430				6.00			—				—
Enterprise Bank & Trust	387,497				10.37			224,237				6.00			298,982				8.00
Common Equity Tier 1 Capital (to Risk Weighted Assets)1
Enterprise Financial Services Corp	357,729				9.52			169,072				4.50			—				—
Enterprise Bank & Trust	387,461				10.37			168,178				4.50			242,923				6.50
Leverage Ratio (Tier 1 Capital to Average Assets)
Enterprise Financial Services Corp	412,865				10.42			158,480				4.00			—				—
Enterprise Bank & Trust	387,497				9.81			157,933				4.00			197,417				5.00
As of December 31, 2015:
Total Capital (to Risk Weighted Assets)
Enterprise Financial Services Corp	$	418,367			11.85	%		$	282,442			8.00	%		$	—			—	%
Enterprise Bank & Trust	386,531				10.98			281,632				8.00			352,040				10.00
Tier 1 Capital (to Risk Weighted Assets)
Enterprise Financial Services Corp	374,676				10.61			211,831				6.00			—				—
Enterprise Bank & Trust	342,840				9.74			211,224				6.00			281,632				8.00
Common Equity Tier 1 Capital (to Risk Weighted Assets)1
Enterprise Financial Services Corp	319,553				9.05			158,873				4.50			—				—
Enterprise Bank & Trust	342,816				9.74			158,418				4.50			228,826				6.50
Leverage Ratio (Tier 1 Capital to Average Assets)
Enterprise Financial Services Corp	374,676				10.71			139,893				4.00			—				—
Enterprise Bank & Trust	342,840				9.84			139,311				4.00			174,138				5.00
1 Not an applicable regulatory ratio until implementation of Basel III in 2015

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- References

No definition available.

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- Definition

Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958570-112826

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1H
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1G
-URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958577-112826

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