Mortgage Servicing Rights - Summary of Carrying Value Under the Amortization Method (Details) - Mortgage Servicing Rights - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Mortgage Servicing Rights Accounted for Under the Amortization Method (Rollforward)
Balance at Beginning of Year	$ 21,451	$ 18,694	$ 23,896
Servicing Rights that Resulted From Asset Transfers	1,217	4,921	3,592
Amortization	(2,595)	(4,227)	(4,902)
Valuation Allowance Recovery (Provision)	1,829	2,063	(3,892)
Balance at End of Year	21,902	21,451	18,694
Valuation Allowance:
Balance at Beginning of Year	(1,829)	(3,892)
Valuation Allowance Recovery (Provision)	1,829	2,063	(3,892)
Balance at End of Year		(1,829)	(3,892)
Fair Value:
Balance at Beginning of Year	21,451	18,694	25,714
Balance at End of Year	$ 27,323	$ 21,451	$ 18,694