Commitments And Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Loss Contingencies [Line Items]
Securities held to maturity, mortgaged related securities, pledged	$ 2,900,000,000	$ 3,100,000,000
Securities held to maturity, other securities, pledged	2,100,000,000	946,800,000
Securities available for sale, mortgaged-related securities, pledged	79,900,000	151,200,000
Securities available for sale, other securities, pledged	0	45,100,000
Commitments	2,322,931,000
Rental expense under non-cancelable operating lease and license agreements	33,700,000	32,500,000	28,100,000
Rental income on bank-owned properties, netted in occupancy and equipment expense	3,900,000	3,400,000	3,800,000
Bankers acceptance outstanding	187,000
Visa Litigation
Loss Contingencies [Line Items]
Fair value contingent obligation to visa U.S.A., based on percentage of membership interest	1,900,000
Total loans
Loss Contingencies [Line Items]
Commitments	$ 2,109,209,000	$ 3,000,000,000