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FAIR VALUE (Changes Level 3 assets fair value, recurring) (Details) - Interest rate lock commitments - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period $ 1,827 $ 681
Total net gains included in earnings (1,485) 2,803
Issuances 5,279 17,221
Settlements (3,764) (18,878)
Balance at period end $ 1,857 $ 1,827