| DERIVATIVES (Tables) | 3 Months Ended | 
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| Mar. 31, 2021 | |
| Derivatives [Abstract] | |
| Cash flow hedges included in the Consolidated Statement of Financial Condition | Notional  Fair Balance Sheet  Weighted Average  (Dollars in Thousands)  Value  Location  March 31, 2021  Interest rate swaps related to subordinated debt  $  30,000 $  2,699 Other Assets  9.3 December 31, 2020  Interest rate swaps related to subordinated debt  $  30,000 $  574 Other Assets  9.5 | 
| Net gains (losses) recorded in accumulated other comprehensive income | Amount of Gain  Amount of Gain  (Loss) Recognized  (Loss) Reclassified  (Dollars in Thousands)  in AOCI  Category  from AOCI to Income  Three months ended March 31, 2021  $  1,587 Interest Expense  $  (33) | 
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- References No definition available. 
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- Definition Tabular disclosure of gain (loss) on derivative and nonderivative instruments designated and qualifying as cash flow hedge recorded in accumulated other comprehensive income (AOCI) and reclassified into earnings. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Tabular disclosure of derivative liabilities at fair value. No definition available. 
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