Payables and Accrued Liabilities - Payables and Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Payables and Accruals [Abstract]
Servicing rights and related advance purchases payable	$ 131,214	$ 12,741
Accounts payable and accrued liabilities	82,434	55,174
Payables to insurance carriers	79,551	69,489
Employee-related liabilities	67,015	90,788
Curtailment liability	60,362	53,905
Originations liability	55,216	50,042
Derivative instruments	28,474	5,882
Uncertain tax positions	21,034	20,550
Acquisition related escrow funds payable to sellers	15,942	19,620
Accrued interest payable	15,573	18,416
Servicing transfer payables	6,741	14,167
Insurance premium cancellation reserve	6,589	7,135
Collateral payable on derivative instruments	1,587	19,148
Contingent earn-out payments	0	5,900	10,900
Other	50,550	51,182
Accounts payable and accrued liabilities	$ 622,282	$ 494,139