Restructuring Related Balance Sheet Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve - Beginning Balance	$ 29,581
Costs incurred and charged to expense	49,090	$ (7,263)	$ 49,482
Cash payments	(20,841)
Non-cash items	7,188
Effect of change in exchange rates	(2,672)
Restructuring Reserve - Ending Balance	47,970	29,581
Employee severance costs
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve - Beginning Balance	26,533
Costs incurred and charged to expense	39,943
Cash payments	(18,452)
Non-cash items	0
Effect of change in exchange rates	(2,656)
Restructuring Reserve - Ending Balance	45,368	26,533
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve - Beginning Balance	0
Costs incurred and charged to expense	7,188
Cash payments	0
Non-cash items	7,188
Effect of change in exchange rates	0
Restructuring Reserve - Ending Balance	0	0
Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve - Beginning Balance	3,048
Costs incurred and charged to expense	1,959
Cash payments	(2,389)
Non-cash items	0
Effect of change in exchange rates	(16)
Restructuring Reserve - Ending Balance	$ 2,602	$ 3,048