Other Liabilities - Components of Other Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Unearned incentive income	$ 100,870	$ 96,079
Accrued expenses	28,286	30,728
Deferred rent credit	9,951	15,046
Interest Payable	6,608	2,654
Loan trades payable	0	10,391
Obligation to deliver loans subject to forward sale agreement, at fair value	0	8,204
Other	14,363	11,892
Total Other Liabilities	$ 160,078	$ 174,994