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Income Taxes - Difference Between Total Income Taxes Expense and Amount Computed at Statutory Federal Income Tax Rate (Detail) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Book income (loss) before income taxes of the TRS	$ (6,040)	$ (4,261)	$ 974
Statutory rate applied to pre-tax income	(1,268)	(1,449)	331
Effect of state and local income taxes, net of federal tax benefit	(200)	(108)	38
Tax reform impact	0	644	0
Provision to return adjustment	0	5	(406)
Permanent adjustments	12	13	16
Change in valuation allowance	1,456	1,289	(299)
Valuation allowance release	(28)	0	0
Other	0	2	19
Total tax (expense) benefit	$ (28)	$ 396	$ (301)
Effective tax rate	0.46%	(9.29%)	(30.90%)

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