Restructuring - 2014 Restructuring Reserve Roll Forward (Details) - Restructuring Plan 2014 - USD ($) $ in Thousands	12 Months Ended			27 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016
Restructuring Reserve [Roll Forward]
Beginning balance	$ 7,573	$ 14,426
Charge to income	(172)	10,980	$ 49,518	$ 60,300
Foreign Currency Translation	(56)	(497)
Utilized, Cash	592	6,253		12,000
Utilized non-cash	4,046	11,083		48,300
Ending balance	2,707	7,573	14,426	2,707
Severance and benefit related costs
Restructuring Reserve [Roll Forward]
Beginning balance	0	466
Charge to income	73	801	687
Foreign Currency Translation	0	(7)
Utilized, Cash	73	1,260
Utilized non-cash	0	0
Ending balance	0	0	466	0
Lease termination costs
Restructuring Reserve [Roll Forward]
Beginning balance	0	0
Charge to income	0	167	0
Foreign Currency Translation		(2)
Utilized, Cash		165
Utilized non-cash		0
Ending balance		0	0
Reserves for customer receivables
Restructuring Reserve [Roll Forward]
Beginning balance	6,605	11,464
Charge to income	(585)	1,186	11,947
Foreign Currency Translation	(47)	(401)
Utilized, Cash	0	0
Utilized non-cash	3,739	5,644
Ending balance	2,234	6,605	11,464	2,234
Other asset write-offs
Restructuring Reserve [Roll Forward]
Beginning balance	0	0
Charge to income	0	1,880	15,909
Foreign Currency Translation		0
Utilized, Cash		0
Utilized non-cash		1,880
Ending balance		0	0
Other restructuring
Restructuring Reserve [Roll Forward]
Beginning balance	968	2,496
Charge to income	340	6,946	6,358
Foreign Currency Translation	(9)	(87)
Utilized, Cash	519	4,828
Utilized non-cash	307	3,559
Ending balance	$ 473	$ 968	$ 2,496	$ 473