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STOCKHOLDERS' EQUITY - Changes to Accumulate Other Comprehensive Income by Components (Details) - Unrealized (loss) gain on securities available-for -sale - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Balance at beginning of period $ 7,746 $ (11,900) $ (24,117)
Unrealized gain (loss) arising during the period (7) 29,867 11,734
Reclassification adjustment from other comprehensive income 0 (2,011) 4,852
OTTI reclassified from accumulated other comprehensive income (loss) to net income 0 0 731
Tax effect of current period changes 4 (8,210) (5,100)
Total changes, net of taxes (3) 19,646 12,217
Balance at end of period $ 7,743 $ 7,746 $ (11,900)