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FAIR VALUES OF FINANCIAL INSTRUMENTS - Reconciliation of Assets Measured at Fair Value on Recurring Basis (Details) - Significant Unobservable Inputs (Level 3) - Recurring - U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Beginning Balance | $ 945 | $ 19,233 | $ 25,040
Total gains or losses (realized/unrealized): |  |  |
Included in earnings-fair value adjustment | 57 | (1,347) | (16)
Additions | 0 | 0 | 406
Sales, settlements, and other | (9) | (16,941) | (6,197)
Ending Balance | $ 993 | $ 945 | $ 19,233

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- Definition Fair Value Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Fair Value Adjustment Including in Earnings + References No definition available. + Details
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- Definition Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales And Settlements + References No definition available. + Details
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- Definition Fair Value Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Total Gains (Losses) [Abstract] + References No definition available. + Details
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