Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,382,442	$ 1,373,625
Goodwill from business combinations	76,566	8,817
Goodwill, ending balance	1,459,008	1,382,442
Consumer Lending
Goodwill [Roll Forward]
Goodwill, beginning balance	307,169	306,572
Goodwill from business combinations	1,079	597
Goodwill, ending balance	308,248	307,169
Commercial Lending
Goodwill [Roll Forward]
Goodwill, beginning balance	833,942	825,767
Goodwill from business combinations	62,073	8,175
Goodwill, ending balance	896,015	833,942
Investment Management
Goodwill [Roll Forward]
Goodwill, beginning balance	220,113	220,068
Goodwill from business combinations	317	45
Goodwill, ending balance	220,430	220,113
Wealth Management | Consumer Lending
Goodwill [Roll Forward]
Goodwill, beginning balance	21,218	21,218
Goodwill from business combinations	13,097	0
Goodwill, ending balance	$ 34,315	$ 21,218