v3.3.1.900

Compensation Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Outstanding Long Term Incentive Awards [Table Text Block] |
(in thousands, except share and per share data) | 2014 - 2016 Cycle |  | 2015 - 2017 Cycle
Shares issuable at target | 107,642 |  |  | 126,000 |
Maximum shares issuable | 141,577 |  |  | 157,250 |
Unrecognized compensation cost | $ | 746 |  |  | $ | 1,454 |
Weighted average grant date fair value | $ | 16.84 |  |  | $ | 19.21 |
Summary of Employee Stock Option and SSARs Activity | Following is a summary of the employee stock option and SSAR activity for 2015.
(in thousands, except share and per share data) | Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding at January 1, 2015 | 401,581 |  |  | $ | 19.24 |  |  |  |  |
Granted | — |  |  | — |  |  |  |  |
Exercised | (13,478 | ) |  | 21.54 |  |  |  |  |
Forfeited | — |  |  | — |  |  |  |  |
Outstanding at December 31, 2015 | 388,103 |  |  | $ | 19.15 |  |  | 2.8 years |  | $ | 3,569 |
Exercisable at December 31, 2015 | 388,103 |  |  | $ | 19.15 |  |  | 2.8 years |  | $ | 3,569 |
Summary of Restricted Stock Units Activity | A summary of the status of the Company's RSU awards as of December 31, 2015 and changes during the year then ended is presented below.
| Shares |  | Weighted Average Grant Date Fair Value
Outstanding at January 1, 2015 | 139,849 |  |  | $ | 13.81 |
Granted | 6,088 |  |  | 20.69 |
Vested | (58,679 | ) |  | 13.79 |
Forfeited | (904 | ) |  | 13.33 |
Outstanding at December 31, 2015 | 86,354 |  |  | $ | 14.31 |
Stock Options and SSARs |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Various Information | Various information related to the stock options and SSARs is shown below.
(in thousands) | 2015 |  | 2014 |  | 2013
Compensation expense | $ | 50 |  |  | $ | 103 |  |  | $ | 213 |
Intrinsic value of option exercises on date of exercise | $ | 74 |  |  | $ | 226 |  |  | $ | 300 |
Cash received from the exercise of stock options | $ | 126 |  |  | $ | 149 |  |  | $ | 2,040 |
Restricted Stock Units (RSUs) |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Various Information | Various information related to the RSUs is shown below.
(in thousands) | 2015 |  | 2014 |  | 2013
Compensation expense | $ | 725 |  |  | $ | 945 |  |  | $ | 1,142 |
Total fair value at vesting date | 809 |  |  | 913 |  |  | 828 |
Total unrecognized compensation cost for nonvested stock units | 942 |  |  | 1,462 |  |  | 2,168 |
Expected years to recognize unearned compensation | 1.7 years |  |  | 2.7 years |  |  | 3.6 years |
Stock Plan for Non-Management Directors |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Various Information | Various information related to the Director Plan is shown below.
(in thousands, except share and per share data) | 2015 |  | 2014 |  | 2013
Shares issued | 16,283 |  |  | 23,135 |  |  | 16,990 |
Weighted average fair value | $ | 24.43 |  |  | $ | 19.20 |  |  | $ | 15.40 |
Compensation expense | $ | 373 |  |  | $ | 329 |  |  | $ | 262 |

X
- Definition [Table Text Block] for Outstanding Long Term Incentive Awards [Table] + References No definition available. + Details
Name: | efsc_OutstandingLongTermIncentiveAwardsTableTextBlock
Namespace Prefix: | efsc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 + Details
Name: | us-gaap_DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=efsc_StockOptionsAndStockSettledStockAppreciationRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=efsc_StockPlanForNonManagementDirectorsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |