Premises and Equipment Components of Premises and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Computer software	$ 128,129	$ 108,415
Computer hardware	45,241	42,147
Leasehold improvements	40,851	36,907
Furniture and equipment	19,434	17,431
Total	233,655	204,900
Accumulated depreciation and amortization	(166,170)	(138,355)
Premises and equipment, net	$ 67,485	$ 66,545