Mortgage Servicing Rights and Mortgage Servicing Liabilities - Mortgage Servicing Liabilities Carried at FV (Details) - Mortgage servicing liabilities - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Amortized cost:
Balance at beginning of period	$ 1,708	$ 1,940	$ 1,805	$ 2,096
Changes in valuation inputs used in valuation model	46	(64)	34	(86)
Other changes in fair value	(36)	(58)	(121)	(192)
Total change in fair value	10	(122)	(87)	(278)
Balance at end of period	1,718	1,818	1,718	1,818
Unpaid principal balance of underlying loans at end of period	$ 20,179	$ 27,010	$ 20,179	$ 27,010