XML 23 R58.htm IDEA: XBRL DOCUMENT
v3.19.3

Purchased Credit Impaired ("PCI") Loans - Narrative (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Receivables [Abstract] |  |
PCI loans outstanding | $ 121.5 | $ 64.7

X
- Definition Loans Purchased From FDIC Outstanding Balance + References No definition available. + Details
Name: | efsc_LoansPurchasedFromFdicOutstandingBalance
Namespace Prefix: | efsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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