v3.3.1.900

Portfolio Loans - Narrative (Details) $ in Millions | Dec. 31, 2015 USD ($) loan
--- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Number of loans over 90 days past due and still accruing interest | loan | 0
Unadvanced commitments on impaired loans | $ 0.0
Specific reserves on restructured loans | 0.2
Unadvanced Commitment on Impaired Loan |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Estimated losses attributable to unadvanced commitments on impaired loans | $ 0.3

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- Definition Financing Receivable Modifications Reserve + References No definition available. + Details
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Namespace Prefix: | efsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Financing Receivable Recorded Investment 90 Days Past Due And Still Accruing Number of Loans + References No definition available. + Details
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Namespace Prefix: | efsc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Loans and Leases Receivable, Impaired Loans, Commitment to Lend, Reserve + References No definition available. + Details
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Namespace Prefix: | efsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- 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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18794-111554 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |