Goodwill And Other Intangible Assets (Narrative) (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Indefinite-lived Intangible Assets [Line Items]
Amortization of other intangible assets	$ 1,154,000	$ 1,078,000	$ 3,438,000	$ 3,216,000
Community banking
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Period Increase (Decrease)			12,500,000
Community banking | Core deposit intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, core deposit intangibles			10 years
Specialty finance
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Period Increase (Decrease)			$ 556,000
Specialty finance | Customer list intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, core deposit intangibles			18 years
Wealth management | Customer list intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, core deposit intangibles			10 years