Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 238,952	$ 230,018
Accumulated Amortization	(164,068)	(159,632)
Net Intangible Assets	74,884	70,386
Loan servicing rights
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	117,363	114,636
Accumulated Amortization	(92,133)	(90,951)
Net Intangible Assets	25,230	23,685
Core deposits
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	109,290	109,290
Accumulated Amortization	(68,373)	(65,488)
Net Intangible Assets	40,917	43,802
Other
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	12,299	6,092
Accumulated Amortization	(3,562)	(3,193)
Net Intangible Assets	$ 8,737	$ 2,899