Components of Other Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Other Assets [Line Items]
Furniture, Equipment and Leasehold Improvements, Net	$ 139,318	$ 135,543
Prepaid Expenses	144,887	190,241
Other Assets	28,168	46,786
Freestanding Derivatives	3,814	4,300
Net Investment Hedges	9	319
Total Other Assets	$ 316,196	$ 377,189