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Mortgage Banking Activities Mortgage Banking Activities, Mortgage Banking Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Mortgage Banking Revenue [Abstract]        
Net realized gains (losses) on sale of mortgage loans $ (1,631) $ (1,072) $ (3,658) $ 8,969
Net change in unrealized loss on mortgage loans held for sale (522) (6,244) (648) (9,764)
Net change in the fair value of mortgage loan commitments (288) (3,174) 487 (5,474)
Net change in the fair value of forward sales contracts 554 8,084 1,015 8,414
Total production revenue (loss) (1,887) (2,406) (2,804) 2,145
Servicing revenue 15,243 13,688 45,668 37,155
Total mortgage banking revenue $ 13,356 $ 11,282 $ 42,864 $ 39,300