Residential Loans at Amortized Cost, Net - Aging of Past Due Residential Loans Portfolio Accounted for at Amortized Cost (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Receivables [Abstract]
Minimum duration for past due residential loans to be considered as non performing	30 days
Financing Receivable, Recorded Investment, Aging [Abstract]
30-59 Days Past Due	$ 22,876	$ 18,798
60-89 Days Past Due	8,901	7,186
90 Days or More Past Due	51,516	54,836
Total Past Due	83,293	80,820
Current	1,289,790	1,328,371
Total	1,373,083	1,409,191
Non- Accrual Loans	$ 51,516	$ 54,836