Other Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Schedule of Other Assets [Line Items]
Furniture, Equipment and Leasehold Improvements, Net	$ 131,715	$ 137,088
Prepaid Expenses	145,098	61,226
Other Assets	65,882	75,815
Freestanding Derivatives	5,680	10,343
Total Other Assets	$ 348,375	$ 284,472