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Mortgage Banking - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Mortgage Banking [Abstract]    
Annual servicing fee income rate 0.28%  
Reserve for mortgage loan servicing putback expenses $ 379 $ 311
Liability to repurchase past due GNMA loans $ 43,400 $ 55,500