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v3.20.4

Parent Company Only Condensed Financial Statements (Parenthetical) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Collateral pledged | $ 36,525 | $ 15,285

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