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
	Mar. 31, 2023	Mar. 31, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 42,489	$ 26,232
Total gains (losses) realized and unrealized:
Included in results of operations	(1,496)	7,558
Included in other comprehensive loss	0	0
Purchases, issuances, settlements, maturities and calls	930	2,143
Transfers in and/or out of Level 3	0	0
Ending balance	41,923	35,933
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 March 31	$ (1,496)	$ 7,558