v3.3.1.900

Commitments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Commitments | The contractual amounts of off-balance-sheet financial instruments as of December 31, 2015, and December 31, 2014, are as follows:
(in thousands) | December 31, 2015 |  | December 31, 2014
Commitments to extend credit | $ | 1,140,028 |  |  | $ | 947,424 |
Standby letters of credit | 54,648 |  |  | 50,108 |

X
- Definition Schedule of Commitments [Table Text Block] + References No definition available. + Details
Name: | efsc_ScheduleOfCommitmentsTableTextBlock
Namespace Prefix: | efsc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration