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Components of Other Assets (Detail) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Schedule of Other Assets [Line Items] |  |
Furniture, Equipment and Leasehold Improvements, Net | $ 174,028 | $ 135,740
Prepaid Expenses | 151,356 | 102,503
Other Assets | 39,994 | 82,704
Freestanding Derivatives | 3,703 | 3,290
Net Investment Hedges |  | 523
Total Other Assets | $ 369,081 | $ 324,760

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