Carrying Value and Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Financial Assets:
Residential mortgage loans held-for-investment	[1]	$ 695,255	$ 744,462
Residential mortgage loans held-for-investment, Estimated Fair Value		698,841	733,759
Financial Liabilities:
Asset-backed securities issued by securitization trusts	[1]	685,888	728,683
Asset-backed securities issued by securitization trust, Estimated Fair Value		$ 688,244	$ 718,008

[1] The consolidated balance sheets include assets of consolidated variable interest entities (“VIEs”) that can only be used to settle obligations and liabilities of the VIEs for which creditors do not have recourse to the Company. At June 30, 2017 and December 31, 2016, total assets of the consolidated VIEs were $698 million and $747 million (including accrued interest receivable of $2.3 million and $2.5 million), respectively, and total liabilities were $688 million and $731 million (including accrued interest payable of $2.2 million and $2.4 million), respectively. Please refer to Note 4, “Variable Interest Entities,” for further discussion.