Other Noninterest Income and Other Noninterest Expense Summary of Other Noninterest Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Other Income and Expenses [Abstract]
Fund management fees	$ 11,163		$ 11,057		$ 10,730
Service-based fee income	7,807		7,937		9,717
Gains (losses) on revaluation of foreign currency instruments	3,016	[1]	1,677	[1]	(2,096)	[1]
Currency revaluation losses	93	[2]	(16)	[2]	(4,275)	[2]
Net gains on the sale of certain assets related to our equity management services business	0		4,243		0
Other	14,060	[3]	11,465	[3]	7,154	[3]
Total other noninterest income	36,139		36,363		21,230
Foreign currency gains (losses) attributable to noncontrolling interests	$ 87		$ 27		$ 2,900

[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 $87 thousand, gains of $27 thousand and losses of $2.9 million in 2013, 2012 and 2011, respectively, 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.