Carrying Value and Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Financial Assets:
Residential mortgage loans held-for-investment	[1]	$ 514,749	$ 549,016
Residential mortgage loans held-for-securitization		121,715	11,660
Residential mortgage loans held-for-investment, Estimated Fair Value		517,744	538,362
Financial Liabilities:
Asset-backed securities issued by securitization trusts	[1]	505,385	539,651
Asset-backed securities issued by securitization trust, Estimated Fair Value		506,630	$ 528,045
Warehouse line of credit		$ 92,511

[1] The consolidated balance sheets include assets of consolidated variable interest entities, or 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, 2019 and December 31, 2018, total assets of the consolidated VIEs were $516 million and $551 million (including accrued interest receivable of $1.7 million and $1.8 million), respectively (which is recorded above in the line item entitled “Interest receivable”), and total liabilities were $507 million and $541 million (including accrued interest payable of $1.7 million and $1.7 million), respectively (which is recorded in the line item above entitled “Accrued interest payable”). Please refer to Note 5, “Variable Interest Entities,” for further discussion.