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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Allowance for Loan and Lease Losses Additional Information (Details) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) | Dec. 31, 2017 USD ($) rolling_quarter | Dec. 31, 2016 USD ($) rolling_quarter
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Credit risk monitoring lock back period | rolling_quarter |  | 39 | 28
Increase ALLL from enhancement of loss emergence period | $ 1.9 |  |
Unfunded Loan Commitment |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Reserve for unfunded loan commitments |  | $ 3.7 | $ 2.4

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- Definition Allowance For Loan And Lease Losses, Increase (Decrease) Due To Enhancement Of Loss Emergence Period + References No definition available. + Details
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- Definition Allowance for Loan and Lease Losses, Comparative Analysis, Look-back Period + References No definition available. + Details
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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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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Details
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