Mortgage Servicing Rights - Changes in Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Servicing Asset at Fair Value, Amount [Roll Forward]
Carrying value at beginning of period	$ 164,879	$ 144,675	$ 168,365	$ 115,512
Capitalization	2,273	5,258	4,061	15,070
Change in fair value:
Due to pay-offs/pay-downs	(3,269)	(5,024)	(5,789)	(9,495)
Due to change in valuation inputs or assumptions	2,550	13,769	(204)	37,591
Carrying value at end of period	$ 166,433	$ 158,678	$ 166,433	$ 158,678