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v3.19.3.a.u2

Parent Company Only Condensed Financial Statements (Parenthetical) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Collateral pledged | $ 15,285 | $ 1,305

X
- Definition Collateral pledged + References No definition available. + Details
Name: | efsc_CollateralPledged
Namespace Prefix: | efsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant