Goodwill And Other Intangible Assets (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Acquired During Period			$ 69,398
Goodwill Adjustments			(2,866)
Amortization of other intangible assets	$ 1,350	$ 1,202	3,297	$ 3,521
Community banking
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Acquired During Period			69,398
Goodwill Adjustments			$ 0
Community banking | Core deposit intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets			10 years
Specialty finance
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Acquired During Period			$ 0
Goodwill Adjustments			$ (2,866)
Specialty finance | Customer list intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets			18 years
Wealth management
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Acquired During Period			$ 0
Goodwill Adjustments			$ 0
Wealth management | Customer list intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets			10 years