Goodwill And Other Intangible Assets (Narrative) (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Indefinite-lived Intangible Assets [Line Items]
Amortization of other intangible assets	$ 1,120,000	$ 1,049,000
Community Banking [Member]
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Period Increase (Decrease)	1,500,000
Specialty Finance [Member]
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Period Increase (Decrease)	$ 265,000
Wealth Management [Member] | Customer Lists [Member]
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, core deposit intangibles	10 years
Specialty Finance [Member] | Customer Lists [Member]
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, core deposit intangibles	18 years
Community Banking [Member] | Core Deposits [Member]
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, core deposit intangibles	10 years