Schedule III - Changes in Real Estate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2014
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
Beginning balance	$ 353,862
Capital expenditures	3,301
Consolidations	15,082
Liquidation adjustment, net	(52,590)
Disposals	(129,095)
Impairments	(3,908)	$ (9,287)
Ending balance	$ 186,652