Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Percentage of ordinary taxable income to be distributed for real estate investment trust qualification	90.00%	90.00%	90.00%
Percentage of taxable income to be distributed for federal income tax assumption	100.00%
Amount of foreign loss before income taxes	$ 29,400,000	$ 7,500,000	$ 12,900,000
Amount of domestic income (loss) before income taxes	7,100,000	$ 20,900,000	$ 7,600,000
U.S federal NOLs	41,400,000
U.S. state NOLs	107,700,000
Foreign NOLs	$ 10,800,000
U.S. federal and state NOLs, expiration period	2021 through 2034
U.S federal alternative minimum tax credits carry forward	$ 300,000
Foreign tax credit	$ 600,000
Foreign tax credit, expiration date	2025
Increase in valuation allowance	$ 6,200,000