Supplemental Balance Sheet, Income Statement and Cash Flow Information (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Balance Sheet, Income Statement and Cash Flow Information
Loss (gains) on sales, disposals and involuntary conversions of long-lived assets	$ (2,293)	$ (8,830)	$ 13,624
Merger transaction	(47,074)
Litigation expenses	8,194	8,880	11,684
Foreign currency transaction losses (gains)	392	1,019	6,219
Losses on debt buybacks		5,576	3,785
Other losses (gains)	1,609	2,428	2,665
Other expense (income)	$ (39,172)	$ 9,073	$ 37,977