Restructuring - Restructuring Plan Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		21 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,535	$ 204	$ 8,332	$ 862
Restructuring Plan 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3,763		13,505
Restructuring Reserve [Roll Forward]
Charge (Credit) to Income	3,763		13,505
Utilized - Cash			10,719
Utilized - Non-Cash			508
Ending balance	2,278		2,278		$ 2,278
Restructuring Plan 2016 | Severance and benefit related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,152		6,793
Restructuring Reserve [Roll Forward]
Utilized - Cash			4,786
Utilized - Non-Cash			0
Ending balance	2,007		2,007		2,007
Restructuring Plan 2016 | Lease termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			969
Restructuring Reserve [Roll Forward]
Utilized - Cash			969
Utilized - Non-Cash			0
Ending balance	0		0		0
Restructuring Plan 2016 | Relocation and other moving costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	383		503
Restructuring Reserve [Roll Forward]
Utilized - Cash			322
Utilized - Non-Cash			0
Ending balance	181		181		181
Restructuring Plan 2016 | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,228		5,240
Restructuring Reserve [Roll Forward]
Utilized - Cash			4,642
Utilized - Non-Cash			508
Ending balance	90		90		90
Restructuring Plan 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charges	100	5,700		9,200
Restructuring Reserve [Roll Forward]
Beginning balance			7,573	14,426
Charge (Credit) to Income	60	5,694	(120)	9,232	60,400
Foreign Currency Translation			0	(147)
Utilized - Cash			214	4,682	12,100
Utilized - Non-Cash			356	5,637	48,300
Ending balance	6,883	13,192	6,883	13,192	6,883
Restructuring Plan 2014 | Severance and benefit related costs
Restructuring Reserve [Roll Forward]
Beginning balance			0	466
Charge (Credit) to Income	0	178	67	694
Foreign Currency Translation			0	(3)
Utilized - Cash			0	975
Utilized - Non-Cash			0	0
Ending balance	67	182	67	182	67
Restructuring Plan 2014 | Lease termination costs
Restructuring Reserve [Roll Forward]
Beginning balance				0
Charge (Credit) to Income	0	26	0	168
Foreign Currency Translation				(2)
Utilized - Cash				166
Utilized - Non-Cash				0
Ending balance		0		0
Restructuring Plan 2014 | Allowances for doubtful accounts
Restructuring Reserve [Roll Forward]
Beginning balance			6,605	11,464
Charge (Credit) to Income	(12)	2,290	(353)	1,291
Foreign Currency Translation			(17)	(72)
Utilized - Cash			0	0
Utilized - Non-Cash			235	2,785
Ending balance	6,000	9,898	6,000	9,898	6,000
Restructuring Plan 2014 | Other restructuring costs
Restructuring Reserve [Roll Forward]
Beginning balance			968	2,496
Charge (Credit) to Income	72	3,200	166	7,079
Foreign Currency Translation			17	(70)
Utilized - Cash			214	3,541
Utilized - Non-Cash			121	2,852
Ending balance	$ 816	$ 3,112	$ 816	$ 3,112	$ 816