Other Noninterest Income and Other Noninterest Expense - Summary of Other Noninterest Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Other Income and Expenses [Abstract]
Fund management fees	$ 2,755		$ 2,769
Service-based fee income	2,027		1,804
(Losses) gains on revaluation of foreign currency instruments	978	[1]	(7,064)	[1]
Currency revaluation (losses) gains	278	[2]	(55)	[2]
Other (3)	5,162	[3]	2,099	[3]
Total other noninterest income (loss)	$ 11,200		$ (447)

[1] Represents the revaluation of foreign currency denominated financial instruments issued and held by us, primarily loans, deposits and cash.

[2] Includes the revaluation of foreign currency denominated financial statements of certain funds. Included in these amounts are gains of $0.2 million for each of the three months ended March 31, 2014, and 2013, attributable to noncontrolling interests calculated based on the ownership percentages of the noncontrolling interests.

[3] Includes dividends on FHLB/FRB stock, correspondent bank rebate income and other fee income.