Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net income	$ 4,875	$ 55,863
Other comprehensive (loss) income, net of tax
Cash flow hedge adjustments, net of taxes of $82 and $(603)for the three and nine months ended September 30, 2017	1,814	0
Foreign currency translation adjustment, net of taxes of $0 and $(19) for the three months ended September 30, 2017 and 2016, respectively, and $56 and $394 for the nine months ended September 30, 2017 and 2016, respectively	15,397	2,029
Other Adjustments, Net of Taxes of $0 for all periods		0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent	2
Other comprehensive income (loss), net of taxes	17,213	2,029
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	22,088	57,892
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	(573)	0
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	0	(48)
Other Comprehensive (Income) Loss, Other Adjustments, Tax	$ 0	$ 0