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 [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Reconciliation for all assets and (liabilities) measured at fair value on a recurring basis using significant unobservable inputs (Level 3) [Roll Forward]
Beginning balance	$ 26,232	$ 16,904
Total losses realized and unrealized [Abstract]
Included in results of operations	7,558	3,257
Included in other comprehensive loss	0	0
Purchases, issuances, settlements, maturities and calls	2,143	3,369
Transfers in and/or out of Level 3	0	0
Ending balance	35,933	23,530
Amount of total 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	$ 7,558	$ 3,257