Unaudited Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 709	$ (1,013)	$ 833	$ 442
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities	182	(68)	384	(370)
Unrealized (loss) gain on interest rate swap	(1,960)	528	(2,693)	1,856
Other comprehensive (loss) income before taxes	(1,778)	460	(2,309)	1,486
Benefit (provision) for income taxes related to other comprehensive income items	372	(96)	484	(312)
Other comprehensive (loss) income	(1,406)	364	(1,825)	1,174
Comprehensive (loss) income	(697)	(649)	(992)	1,616
Comprehensive income (loss) attributable to non-controlling interests	2	(16)	7	(18)
Comprehensive (loss) income attributable to common stockholders	$ (699)	$ (633)	$ (999)	$ 1,634