Goodwill And Other Intangible Assets (Goodwill Assets By Business Segment) (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Goodwill [Roll Forward]
Beginning balance	$ 345,401	$ 331,634
Goodwill Acquired	13,960
Impairment Loss	0
Goodwill Adjustments	(2,052)
Ending balance	357,309	331,634
Community banking
Goodwill [Roll Forward]
Beginning balance	274,963
Goodwill Acquired	13,960
Impairment Loss	0
Goodwill Adjustments	(1,496)
Ending balance	287,427
Specialty finance
Goodwill [Roll Forward]
Beginning balance	38,574
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	(556)
Ending balance	38,018
Wealth management
Goodwill [Roll Forward]
Beginning balance	31,864
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	0
Ending balance	$ 31,864