Restructuring Restructuring Costs (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2016 USD ($) numberofemployees	Mar. 31, 2015 USD ($)	Jan. 26, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		35.0
Total revenue		$ 731,971	$ 750,356
Restructuring Revenue			14,900
Restructuring Loss			4,300
Restructuring charges		$ 12,444	0
Number of employees terminated | numberofemployees		500
North America [Member]
Restructuring Cost and Reserve [Line Items]
Total revenue	[1]	$ 500,813	479,882
Restructuring charges		5,600
EMEA [Member]
Restructuring Cost and Reserve [Line Items]
Total revenue	[1]	188,970	216,220
Restructuring charges		3,500
ROW [Member]
Restructuring Cost and Reserve [Line Items]
Total revenue		42,188	$ 54,254
Restructuring charges		3,400
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		34,700
Restructuring charges	[2]	11,319
Employee Severance [Member] | North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	[2]	4,725
Employee Severance [Member] | EMEA [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	[2]	3,267
Employee Severance [Member] | ROW [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	[2]	3,327
Asset Impairments Related to Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		7,300
Restructuring charges		45
Asset Impairments Related to Restructuring [Member] | North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		45
Asset Impairments Related to Restructuring [Member] | EMEA [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0
Asset Impairments Related to Restructuring [Member] | ROW [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		1,080
Other Restructuring [Member] | North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		849
Other Restructuring [Member] | EMEA [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		208
Other Restructuring [Member] | ROW [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 23
Facility Closing [Member] | EMEA [Member]
Restructuring Cost and Reserve [Line Items]
Number of Countries in which Entity Operates		11		4
Facility Closing [Member] | ROW [Member]
Restructuring Cost and Reserve [Line Items]
Number of Countries in which Entity Operates		6

[1] North America includes revenue from the United States of $492.6 million and $473.1 million for the three months ended March 31, 2016 and 2015, respectively. EMEA includes revenue from Switzerland of $113.3 million and $117.5 million for the three months ended March 31, 2016 and 2015, respectively. There were no other individual countries that represented more than 10% of consolidated total revenue for the three months ended March 31, 2016 and 2015.

[2] The employee severance and benefit costs for the three months ended March 31, 2016 relates to the termination of approximately 500 employees. Substantially all of the remaining cash payments for those costs are expected to be disbursed through June 30, 2016.