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FAIR VALUE - Additional Information (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value | $ 481,120,000 |  | $ 481,120,000 |  | $ 465,844,000
Purchase of investment |  |  | 166,694,000 | $ 211,014,000 |
Premium amortization |  |  | 72,000 |  |
Specific charges to value the real estate owned | 0 |  | 0 |  | 0
Changes in fair value of OREO still held | 0 | $ 11,000 | 0 | 11,000 |
Reserve for mortgage servicing rights | 240,000 |  | 240,000 |  | 0
Mortgage servicing rights impairment | 221,000 |  | 240,000 | $ 0 |
Private label commercial CMOs |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value | 7,213,000 |  | 7,213,000 |  | 7,209,000
Purchase of investment |  |  | 7,213,000 |  |
Premium amortization | 31,000 |  |  |  |
Unrealized loss | 87,000 |  |  |  |
Unrealized gain |  |  | 76,000 |  |
Fair Value, Measurements, Recurring |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair value liabilities | 0 |  | 0 |  | 0
Fair Value | 481,120,000 |  | 481,120,000 |  | 465,844,000
Allowance for loan losses | 863,000 |  | 863,000 |  | 928,000
Fair Value, Measurements, Recurring | Private label commercial CMOs |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value | $ 87,767,000 |  | $ 87,767,000 |  | $ 75,045,000

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- Definition Other Real Estate, Foreclosed Assets, Valuation Adjustment + References No definition available. + Details
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- Definition Amount of unrealized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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- Definition The adjustment to the carrying value of the rights retained or purchased to service mortgages. These adjustments are made when the estimate of the fair value is changed. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746 + Details
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