Fair Value Measurements - Reconciliation of Assets with Unobservable Inputs (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 17,478,000	$ 15,697,000	$ 16,195,000	$ 16,562,000
Change included in earnings	(791,000)	(1,487,000)	(615,000)	(3,666,000)
Purchases and issuances	4,991,000	8,946,000	10,360,000	19,702,000
Sales and settlements	(1,741,000)	(5,985,000)	(6,004,000)	(15,427,000)
Ending balance	19,937,000	17,171,000	19,937,000	17,171,000
Net change in unrealized gains (losses) relating to items held at end of period	2,567,000	3,044,000	2,567,000	3,044,000
Net change in unrealized gains (losses) included in other comprehensive income	0	0	0	0
Mortgage servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	15,422,000	11,657,000	13,724,000	11,218,000
Change included in earnings	(249,000)	(567,000)	462,000	(1,576,000)
Purchases and issuances	1,128,000	1,745,000	2,115,000	3,193,000
Sales and settlements	0	0	0	0
Ending balance	16,301,000	12,835,000	16,301,000	12,835,000
Net change in unrealized gains (losses) relating to items held at end of period	0	0	0	0
Commercial servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	1,091,000	1,327,000	1,084,000	1,310,000
Change included in earnings	(22,000)	(53,000)	(48,000)	(76,000)
Purchases and issuances	0	18,000	33,000	58,000
Sales and settlements	0	0	0	0
Ending balance	1,069,000	1,292,000	1,069,000	1,292,000
Net change in unrealized gains (losses) relating to items held at end of period	0	0	0	0
Interest rate lock commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	965,000	2,713,000	1,387,000	4,034,000
Change included in earnings	(520,000)	(867,000)	(1,029,000)	(2,014,000)
Purchases and issuances	3,863,000	7,183,000	8,212,000	16,451,000
Sales and settlements	(1,741,000)	(5,985,000)	(6,004,000)	(15,427,000)
Ending balance	2,567,000	3,044,000	2,567,000	3,044,000
Net change in unrealized gains (losses) relating to items held at end of period	$ 2,567,000	$ 3,044,000	$ 2,567,000	$ 3,044,000