Restructuring Restructuring Activity (Details) $ in Thousands	1 Months Ended	3 Months Ended				6 Months Ended	12 Months Ended
	Apr. 30, 2017 USD ($) employee	Mar. 31, 2017 USD ($) employee		Mar. 31, 2016 USD ($) employee		Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employee		200		300
Restructuring Charges		$ 2,731		$ 11,513
Restructuring Reserve		9,400				$ 11,069	$ 16,395	$ 0
Restructuring charges		2,731				21,250	35,479
Payments for Restructuring		(9,953)				(9,608)	(29,717)
Restructuring Reserve, Translation Adjustment		227				(573)	(436)
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		2,301	[1]	10,325	[2]
Restructuring Reserve		9,212				8,872	14,135	0
Restructuring charges		2,301				18,310	29,416
Payments for Restructuring		(7,423)				(8,862)	(23,729)
Restructuring Reserve, Translation Adjustment		199				(576)	(424)
Asset Impairments Related to Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0		45
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		430		1,143
Restructuring Reserve		188				2,197	2,260	$ 0
Restructuring charges		430				2,940	6,063
Payments for Restructuring		(2,530)				(746)	(5,988)
Restructuring Reserve, Translation Adjustment		28				$ 3	$ (12)
North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		2,000		5,600
North America [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		1,778		4,725
North America [Member] | Asset Impairments Related to Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0		45
North America [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		177		849
EMEA [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		800		5,900
EMEA [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		523		5,600
EMEA [Member] | Asset Impairments Related to Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0		0
EMEA [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 253		$ 294
Subsequent Event [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employee	300
Restructuring Charges	$ 2,000

[1] The employee severance and benefit costs for the three months ended March 31, 2017 relates to the termination of approximately 200 employees. Substantially all of the remaining cash payments for those costs are expected to be disbursed through December 31, 2017.

[2] The employee severance and benefit costs for the three months ended March 31, 2016 related to the termination of approximately 300 employees.