Supplemental Balance Sheet, Income Statement and Cash Flow Information - Other Expense (Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other expense (income)
Losses (gains) on sales, disposals and involuntary conversions of long-lived assets	$ 2,257	$ 2,875
Gain on Merger transaction	7,044
Litigation expenses and reserves	3,600	821
Foreign currency transaction losses (gains)	2,522	876
(Gain) loss on debt buyback		8,596
Other losses (gains)	(1,334)	342
Other expense (income)	$ 14,089	$ 13,510