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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Troubled Debt Restructurings Additional Information (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 USD ($) Loan | Sep. 30, 2017 Loan | Sep. 30, 2018 USD ($) Loan | Sep. 30, 2017 USD ($) Loan | Dec. 31, 2017 USD ($)
Receivables [Abstract] |  |  |  |  |
Accruing TDRs | $ 5,600,000 |  | $ 5,600,000 |  | $ 5,600,000
Nonaccruing TDRs | 2,700,000 |  | $ 2,700,000 |  | $ 2,700,000
Post-Modification Outstanding Recorded Investment | $ 0 |  |  |  |
Number of loans modified that had payments default during the period | Loan | 1 | 0 | 1 | 1 |
Aggregate principal, loans modified that had payments default during the period | $ 100,000 |  | $ 100,000 | $ 124,000 |

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- Definition Financing Receivable, Modifications, Recorded Investment, Nonaccrual Status + References No definition available. + Details
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- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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