Deposits - Additional Information (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Schedule of Investments [Line Items]
Aggregate amounts of deposits reclassified as loan balances	$ 4,700,000	$ 5,200,000
Aggregate amounts of CDs of $100,000 or more	3,403,942,000	4,700,000,000
Brokered deposits	4,100,000,000	4,700,000,000
Brokered deposits, weighted average interest rates	0.24%	0.39%
Money Market Accounts
Schedule of Investments [Line Items]
Brokered deposits	3,600,000,000	3,700,000,000
Non Interest Bearing Accounts
Schedule of Investments [Line Items]
Brokered deposits	260,500,000	189,200,000
Certificates of Deposits
Schedule of Investments [Line Items]
Brokered deposits	$ 212,100,000	$ 793,800,000