Other Assets and Liabilities - Accrued Expenses and Other Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Accrued compensation	$ 11,927	$ 19,273
Margin payable	10,156	6,455
Guarantee obligation	6,146	7,201
Current accounts payable	5,446	2,112
Residential loan and MSR repurchase reserve	5,083	3,724
Accrued operating expenses	3,501	3,334
Legal reserve	2,000	2,000
Income tax payable	221	0
Other	5,445	8,145
Total Other Liabilities	$ 49,925	$ 52,244