Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (8,590)	$ 21,056	$ 10,941	$ 62,444
Periodic revaluation of interest rate swap, net of tax (expense) benefit of ($0.4 million) and $0.1 million	963	0	(212)	0
Reclassification adjustment for interest recognized in Consolidated Statement of Operations, net of tax expense of $0.3 million	610	0	623	0
Net change in unrecognized gain on interest rate swaps, net of tax	1,573	0	411	0
Foreign currency translation gain (loss)	834	1,705	(962)	3,305
Other comprehensive income (loss)	2,407	1,705	(551)	3,305
Comprehensive (loss) income	$ (6,183)	$ 22,761	$ 10,390	$ 65,749