Restructuring - Restructuring Plan Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring Reserve [Roll Forward]
Charge (reversal) to income	$ 204	$ 0	$ 862	$ 0
Restructuring Plan 2014 [Member]
Restructuring Reserve [Roll Forward]
Reserves at December 31, 2014			14,426
Charge (reversal) to income			9,232
Foreign currency translation			(147)
Utilized - Cash			4,682
Utilized - Non-Cash			5,637
Reserves at June 30, 2015	13,192		13,192
Restructuring Plan 2014 [Member] | Severance and benefit costs [Member]
Restructuring Reserve [Roll Forward]
Reserves at December 31, 2014			466
Charge (reversal) to income			694
Foreign currency translation			(3)
Utilized - Cash			975
Utilized - Non-Cash			0
Reserves at June 30, 2015	182		182
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 June 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			1,291
Foreign currency translation			(72)
Utilized - Cash			0
Utilized - Non-Cash			2,785
Reserves at June 30, 2015	9,898		9,898
Restructuring Plan 2014 [Member] | Currency translation [Member]
Restructuring Reserve [Roll Forward]
Reserves at December 31, 2014			0
Charge (reversal) to income			820
Foreign currency translation			0
Utilized - Cash			0
Utilized - Non-Cash			820
Reserves at June 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			6,259
Foreign currency translation			(70)
Utilized - Cash			3,541
Utilized - Non-Cash			2,032
Reserves at June 30, 2015	$ 3,112		$ 3,112