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LOAN COMMITMENTS AND OTHER RELATED ACTIVITIES - Contractual Amount of Financial Instruments with Off-Balance-Sheet Risk (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Commitments to extend credit    
Other Commitments [Line Items]    
Fixed Rate $ 37,107 $ 17,555
Variable Rate 136,921 38,141
Unused lines of credit    
Other Commitments [Line Items]    
Fixed Rate 6,894 1,783
Variable Rate 1,699,933 1,348,138
Letters of credit    
Other Commitments [Line Items]    
Fixed Rate 2,553 234
Variable Rate $ 5,617 $ 8,274