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GOODWILL AND OTHER INTANGIBLE ASSETS - Change in Carrying Amount of Goodwill (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Changes in the carrying amount of goodwill    
Balance, beginning of period $ 52,505,000 $ 28,388,000
Goodwill arising in business combination 0 24,117,000
Balance, end of period 52,505,000 52,505,000
Goodwill impairment $ 0 $ 0