Income Taxes - Schedule of tax effects of temporary differences and carryforwards of the TRSs included in net deferred tax assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 25,751	$ 21,398
Property, primarily differences in depreciation and amortization, the tax basis of land assets and treatment of certain other costs	4,524	5,077
Other	1,922	2,531
Deferred tax assets	$ 32,197	$ 29,006