Restructuring Restructuring Activity (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 16,085		$ 0	$ 28,529		$ 0
Restructuring Reserve		14,259			14,259			$ 11,556
Restructuring charges	[1]	23,775
Payments for Restructuring		21,274
Restructuring Reserve, Translation Adjustment		202
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		14,444	[2]		25,763	[3]
Restructuring Reserve		13,707			13,707			9,017
Restructuring charges	[1]	21,054
Payments for Restructuring		16,552
Restructuring Reserve, Translation Adjustment		188
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		1,641			2,721
Restructuring Reserve		552			552			$ 2,539
Restructuring charges		2,721
Payments for Restructuring		4,722
Restructuring Reserve, Translation Adjustment		14
North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		2,800			8,400
North America [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		1,488			6,213
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		1,318			2,167
EMEA [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		12,700			16,200
EMEA [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		12,562			15,829
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		121			329
ROW [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		600			3,900
ROW [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		394			3,721
ROW [Member] | Asset Impairments Related to Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0			0
ROW [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 202			$ 225

[1] Excludes stock-based compensation of $4.7 million related to accelerated vesting of stock-based compensation awards for certain employees terminated as a result of the Company's restructuring activities for the six months ended June 30, 2016.

[2] The employee severance and benefit costs for the three months ended June 30, 2016 relates to the termination of approximately 250 employees. Substantially all of the remaining cash payments for those costs are expected to be disbursed through December 31, 2017.

[3] The employee severance and benefit costs for the six months ended June 30, 2016 relates to the termination of approximately 750 employees. Substantially all of the remaining cash payments for those costs are expected to be disbursed through December 31, 2017.