Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (1,647)	$ 804
Other comprehensive (loss) income:
Change in fair value of swap agreement	0	74
Total comprehensive (loss) income	(1,647)	878
Comprehensive loss (income) attributable to noncontrolling interests	7	(1)
Comprehensive (loss) income attributable to common stockholders	$ (1,640)	$ 877