Mortgage Servicing Rights and Mortgage Servicing Liabilities - Mortgage Servicing Liabilities Carried at FV (Details) - Mortgage servicing liabilities - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Amortized cost:
Balance at beginning of period	$ 2,011	$ 2,564	$ 2,096	$ 2,816
Changes in valuation inputs used in valuation model	(7)	(129)	(22)	(267)
Other changes in fair value	(64)	(98)	(134)	(212)
Total change in fair value	(71)	(227)	(156)	(479)
Balance at end of period	1,940	2,337	1,940	2,337
UPB of underlying loan at end of period	$ 36,628	$ 41,481	$ 36,628	$ 41,481