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MORTGAGE SERVICING RIGHTS - Interest in MSR Rollforward (Details) - Interests in MSR - Level 3
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
Servicing Asset at Fair Value, Amount [Roll Forward]  
Beginning balance $ 0
Purchases 65,107
Gain (loss) included in net income 4,209
Ending balance $ 69,316