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BUSINESS COMBINATIONS - Covenant Acquisition (Details) - USD ($)
3 Months Ended 12 Months Ended
Jul. 01, 2020
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
BUSINESS COMBINATIONS                
Goodwill   $ 52,505,000       $ 52,505,000 $ 52,505,000 $ 28,388,000
Merger-related expenses   $ 182,000 $ 6,402,000 $ 983,000 $ 141,000 0 7,708,000  
Covenant Financial Inc.                
BUSINESS COMBINATIONS                
Goodwill $ 24,100,000              
Loans 464,200,000              
Deposits 481,800,000              
Borrowings 64,000,000.0              
Subordinated debt 10,100,000              
Available-for-sale debt securities 10,800,000              
Bank owned life insurance $ 11,200,000              
Refinement term of assets and liabilities 1 year              
Merger-related expenses           $ 0 $ 7,708,000  
Covenant Financial Inc. | Core Deposits                
BUSINESS COMBINATIONS                
Core deposit intangible asset $ 3,100,000