Unaudited Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 124	$ 1,455
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities	202	(302)
Unrealized (loss) gain on interest rate swap	(733)
Unrealized (loss) gain on interest rate swap		1,328
Other comprehensive (loss) income before taxes	(531)	1,026
Benefit (provision) for income taxes related to other comprehensive income items	112	(216)
Other comprehensive (loss) income	(419)	810
Comprehensive (loss) income	(295)	2,265
Comprehensive income (loss) attributable to non-controlling interests	5	(2)
Comprehensive (loss) income attributable to common stockholders	$ (300)	$ 2,267