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Components of Other Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Other Assets [Line Items]
Furniture, Equipment and Leasehold Improvements	$ 952,577	$ 937,355
Less: Accumulated Depreciation	(417,903)	(394,602)
Furniture, Equipment and Leasehold Improvements, Net	534,674	542,753
Prepaid Expenses	314,873	207,886
Freestanding Derivatives	163,664	170,890
Other	59,416	23,319
Total Other Assets	$ 1,072,627	$ 944,848

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