Restructuring Related Balance Sheet Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Beginning balance, January 1, 2017	$ 47,970
Costs charged to expense	3,052	$ 2,237
Cash payments	(4,849)
Non-cash items	0
Effect of change in exchange rates	1,195
Ending balance, March 31, 2017	47,368
Accrued Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, January 1, 2017	45,368
Costs charged to expense	1,316
Cash payments	(3,291)
Non-cash items	0
Effect of change in exchange rates	1,193
Ending balance, March 31, 2017	44,586
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, January 1, 2017	0
Costs charged to expense	0
Cash payments	0
Non-cash items	0
Effect of change in exchange rates	0
Ending balance, March 31, 2017	0
Other Accrued Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, January 1, 2017	2,602
Costs charged to expense	1,736
Cash payments	(1,558)
Non-cash items	0
Effect of change in exchange rates	2
Ending balance, March 31, 2017	$ 2,782