Unaudited Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 384	$ 37	$ (626)	$ 870
Other comprehensive gain (loss):
Unrealized (loss) gain on available-for-sale securities	(80)	59	(22)	443
Unrealized gain (loss) on interest rate swap	360	(1,195)	(3,965)	(3,888)
Other comprehensive gain (loss) before taxes	280	(1,136)	(3,987)	(3,445)
(Expense) benefit for income taxes related to other comprehensive income items	(78)	239	1,088	723
Other comprehensive gain (loss)	202	(897)	(2,899)	(2,722)
Comprehensive income (loss)	586	(860)	(3,525)	(1,852)
Comprehensive loss attributable to non-controlling interests	(14)	(10)	(9)	(3)
Comprehensive income (loss) attributable to common stockholders	$ 600	$ (850)	$ (3,516)	$ (1,849)