Restructuring - Restructuring Plan Activity (Details) - USD ($) $ in Thousands	3 Months Ended		18 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 6,797	$ 658
Restructuring Plan 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	9,742
Restructuring Reserve [Roll Forward]
Utilized - Cash	6,671
Utilized - Non-Cash	0
Ending balance	3,071		$ 3,071
Restructuring Plan 2016 | Severance and benefit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	5,641
Restructuring Reserve [Roll Forward]
Utilized - Cash	3,062
Utilized - Non-Cash	0
Ending balance	2,579		2,579
Restructuring Plan 2016 | Lease termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	969
Restructuring Reserve [Roll Forward]
Utilized - Cash	583
Utilized - Non-Cash	0
Ending balance	386		386
Restructuring Plan 2016 | Relocation and other moving costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	120
Restructuring Reserve [Roll Forward]
Utilized - Cash	120
Utilized - Non-Cash	0
Ending balance	0		0
Restructuring Plan 2016 | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3,012
Restructuring Reserve [Roll Forward]
Utilized - Cash	2,906
Utilized - Non-Cash	0
Ending balance	106		106
Restructuring Plan 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(200)	800
Restructuring Reserve [Roll Forward]
Beginning balance	7,573	14,426
Charge (Credit) to Income	(180)	3,538	60,300
Foreign Currency Translation	82	(105)
Utilized - Cash	45	1,520	12,000
Utilized - Non-Cash	364	2,448	48,300
Ending balance	7,066	13,891	7,066
Restructuring Plan 2014 | Severance and benefit costs
Restructuring Reserve [Roll Forward]
Beginning balance	0	466
Charge (Credit) to Income	67	516
Foreign Currency Translation	0	(2)
Utilized - Cash	0	82
Utilized - Non-Cash	0	0
Ending balance	67	898	67
Restructuring Plan 2014 | Lease termination costs
Restructuring Reserve [Roll Forward]
Beginning balance	0	0
Charge (Credit) to Income	0	141
Foreign Currency Translation	0	0
Utilized - Cash	0	141
Utilized - Non-Cash	0	0
Ending balance	0	0	0
Restructuring Plan 2014 | Allowance for doubtful accounts
Restructuring Reserve [Roll Forward]
Beginning balance	6,605	11,464
Charge (Credit) to Income	(341)	(999)
Foreign Currency Translation	49	(1)
Utilized - Cash	0	0
Utilized - Non-Cash	235	(124)
Ending balance	6,078	10,588	6,078
Restructuring Plan 2014 | Other restructuring costs
Restructuring Reserve [Roll Forward]
Beginning balance	968	2,496
Charge (Credit) to Income	94	3,880
Foreign Currency Translation	33	(102)
Utilized - Cash	45	1,297
Utilized - Non-Cash	129	2,572
Ending balance	$ 921	$ 2,405	$ 921