Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 575,892
Goodwill from business combinations	1,642
Goodwill, ending balance	577,534
Wealth Management [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	20,517
Goodwill from business combinations	0
Goodwill, ending balance	20,517
Consumer Lending [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	168,922
Goodwill from business combinations	450
Goodwill, ending balance	169,372
Commercial Lending [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	252,900
Goodwill from business combinations	869
Goodwill, ending balance	253,769
Investment Management [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	133,553
Goodwill from business combinations	323
Goodwill, ending balance	$ 133,876