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ACQUISITIONS - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
Business Acquisition [Line Items]        
Goodwill $ 30,400 $ 30,588 $ 24,191 $ 24,191
Acquisition cost $ 500      
Teton Financial Services        
Business Acquisition [Line Items]        
Purchase consideration   51,319    
Goodwill   $ 6,209