Goodwill And Other Intangible Assets (Narrative) (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Indefinite-lived Intangible Assets [Line Items]
Amortization of other intangible assets	$ 1,013,000	$ 1,163,000
Community banking
Indefinite-lived Intangible Assets [Line Items]
Goodwill increase or decrease in the period	16,700,000
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 increase or decrease in the period	$ 2,200,000
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