Fair Value Disclosures - Reconciliation for all Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) (Details) - Capitalized Mortgage Loan Servicing Rights - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 44,427	$ 39,477	$ 42,489	$ 26,232
Total gains (losses) realized and unrealized:
Included in results of operations	471	2,093	456	11,689
Included in other comprehensive loss	0	0	0	0
Purchases, issuances, settlements, maturities and calls	1,159	1,588	3,112	5,237
Transfers in and/or out of Level 3	0	0	0	0
Ending balance	46,057	43,158	46,057	43,158
Amount of total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities still held at June 30	$ 471	$ 2,093	$ 456	$ 11,689