Derivatives and Hedging Instruments - Summary of Fair Value of Derivative Instruments as Recorded in Company's Consolidated Statements of Financial Condition (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Other Liabilities [Member] | Foreign Currency Exchange Contracts [Member]
Derivative [Line Items]
Derivatives designated as hedging instruments	$ (4,123)	$ (2,010)
Other Liabilities [Member] | Interest Rate Cap [Member]
Derivative [Line Items]
Derivatives designated as hedging instruments		(645)
Other Assets [Member] | Foreign Currency Exchange Contracts [Member]
Derivative [Line Items]
Derivatives designated as hedging instruments	46
Other Assets [Member] | Interest Rate Cap [Member]
Derivative [Line Items]
Derivatives not designated as hedging instruments	$ 202