Goodwill And Other Intangible Assets (Goodwill Assets By Business Segment) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Goodwill [Roll Forward]
Beginning balance	$ 374,547	$ 343,632
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	(822)
Ending balance	373,725	343,632
Community banking
Goodwill [Roll Forward]
Beginning balance	305,313
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	0
Ending balance	305,313
Specialty finance
Goodwill [Roll Forward]
Beginning balance	37,370
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	(822)
Ending balance	36,548
Wealth management
Goodwill [Roll Forward]
Beginning balance	31,864
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	0
Ending balance	$ 31,864