CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Consolidated net (loss) income	$ (1,376)	$ 1,920
Other comprehensive loss, before income tax:
Unrealized foreign currency translation gain (loss)	72	(27)
Unrealized loss on interest rate contracts	(350)	(228)
Reclassification adjustment to interest expense	12	0
Other comprehensive loss, before income tax	(266)	(255)
Taxes on other comprehensive loss:
Income tax expense (benefit) related to foreign currency translation adjustments	18	(4)
Income tax benefit related to unrealized gain on interest rate contracts	(88)	(57)
Income tax expense related to reclassification adjustment to interest expense	3	0
Taxes on other comprehensive loss	(67)	(61)
Other comprehensive loss, net of tax	(199)	(194)
Comprehensive (loss) income	(1,575)	1,726
Less: Net income attributable to noncontrolling interest in subsidiary	391	278
Comprehensive (loss) income attributable to common shareholders	$ (1,966)	$ 1,448