Restructuring - Restructuring Plan Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Reserve [Roll Forward]
Charge (reversal) to income	$ 172	$ 0	$ 1,034	$ 0
Restructuring Plan 2014 [Member]
Restructuring Reserve [Roll Forward]
Reserves at December 31, 2014			14,426
Charge (reversal) to income			10,730
Foreign currency translation			(397)
Utilized - Cash			5,416
Utilized - Non-Cash			8,695
Reserves at September 30, 2015	10,648		10,648
Restructuring Plan 2014 [Member] | Severance and benefit costs [Member]
Restructuring Reserve [Roll Forward]
Reserves at December 31, 2014			466
Charge (reversal) to income			866
Foreign currency translation			(7)
Utilized - Cash			1,205
Utilized - Non-Cash			0
Reserves at September 30, 2015	120		120
Restructuring Plan 2014 [Member] | Lease termination costs [Member]
Restructuring Reserve [Roll Forward]
Reserves at December 31, 2014			0
Charge (reversal) to income			168
Foreign currency translation			(2)
Utilized - Cash			166
Utilized - Non-Cash			0
Reserves at September 30, 2015	0		0
Restructuring Plan 2014 [Member] | Allowance for doubtful accounts [Member]
Restructuring Reserve [Roll Forward]
Reserves at December 31, 2014			11,464
Charge (reversal) to income			1,630
Foreign currency translation			(321)
Utilized - Cash			0
Utilized - Non-Cash			3,863
Reserves at September 30, 2015	8,910		8,910
Restructuring Plan 2014 [Member] | Currency translation [Member]
Restructuring Reserve [Roll Forward]
Reserves at December 31, 2014			0
Charge (reversal) to income			864
Foreign currency translation			0
Utilized - Cash			0
Utilized - Non-Cash			864
Reserves at September 30, 2015	0		0
Restructuring Plan 2014 [Member] | Other restructuring costs [Member]
Restructuring Reserve [Roll Forward]
Reserves at December 31, 2014			2,496
Charge (reversal) to income			7,202
Foreign currency translation			(67)
Utilized - Cash			4,045
Utilized - Non-Cash			3,968
Reserves at September 30, 2015	$ 1,618		$ 1,618