Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) (Fair Value, Measurements, Nonrecurring, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Residential loans, at lower of cost or fair value	$ 1,229
REO	829
Level 3
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Residential loans, at lower of cost or fair value	1,229
REO	829
Residential Loans at Lower of Cost or Fair Value
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Gain (Loss) on assets measured at fair value on a non-recurring basis	(2)
REO
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Gain (Loss) on assets measured at fair value on a non-recurring basis	$ 169