Goodwill And Other Intangible Assets (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Indefinite-lived Intangible Assets [Line Items]
Goodwill increase due to foreign currency translation adjustments			$ 2,707
Amortization of other intangible assets	$ 1,085	$ 1,350	3,631	$ 3,297
Community banking
Indefinite-lived Intangible Assets [Line Items]
Goodwill increase			13,000
Goodwill increase due to foreign currency translation adjustments			$ 1,517
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 increase due to foreign currency translation adjustments			$ 1,190
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 increase due to foreign currency translation adjustments			$ 0
Wealth management | Customer list intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets			10 years