CONDENSED 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]
Consolidated net (loss) income	$ (51,270)	$ 1,824	$ (52,646)	$ 3,744
Other comprehensive (loss) income, before income tax:
Unrealized foreign currency translation gain (loss)	1	(63)	73	(90)
Unrealized (loss) gain on interest rate contracts	(624)	247	(974)	19
Reclassification adjustment to interest expense	16	86	28	86
Other comprehensive (loss) income, before income tax	(607)	270	(873)	15
Taxes on other comprehensive (loss) income:
Income tax effect related to foreign currency translation adjustments	0	(13)	18	(17)
Income tax effect related to unrealized (loss) gain on interest rate contracts	(158)	62	(246)	5
Income tax expense related to reclassification adjustment to interest expense	4	22	7	22
Valuation allowance adjustment	221	0	221	0
Taxes on other comprehensive (loss) income	67	71	0	10
Other comprehensive (loss) income, net of tax	(674)	199	(873)	5
Comprehensive (loss) income	(51,944)	2,023	(53,519)	3,749
Less: Net income attributable to noncontrolling interest in subsidiary	404	285	795	563
Comprehensive (loss) income attributable to common shareholders	$ (52,348)	$ 1,738	$ (54,314)	$ 3,186

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