Segment Information Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Number of Reportable Segments		3
Revenue		$ 731,971	$ 750,356
Segment cost of revenue and operating expenses	[1],[2]	745,289	710,186
Segment operating income (loss)	[1]	(13,318)	40,170
Share-based Compensation	[3]	30,551
Share-based Compensation	[3]	30,756	35,144
Acquisition-related (benefit) expense, net		3,464	(269)
Income (loss) from operations		(47,333)	5,295
Other expense, net		3,486	(19,927)
Loss from continuing operations before provision for income taxes		(43,847)	(14,632)
Provision for income taxes		1,749	2,107
Net loss from continuing operations		(45,596)	(16,739)
Net loss from discontinued operations		0	6,284
Net loss		(45,596)	(10,455)
Restructuring charges		12,444	0
North America [Member]
Segment Reporting Information [Line Items]
Restructuring Charges ex. SBC		2,900
Revenue	[4]	500,813	479,882
Segment cost of revenue and operating expenses	[1],[2]	512,261	455,216
Segment operating income (loss)	[1]	(11,448)	24,666
Share-based Compensation		27,023	31,252
Acquisition-related (benefit) expense, net		3,464	(269)
Restructuring charges		5,600
EMEA [Member]
Segment Reporting Information [Line Items]
Revenue	[4]	188,970	216,220
Segment cost of revenue and operating expenses	[1],[2]	183,054	196,568
Segment operating income (loss)	[1]	5,916	19,652
Share-based Compensation		2,120	2,647
Acquisition-related (benefit) expense, net		0	0
Restructuring charges		3,500
ROW [Member]
Segment Reporting Information [Line Items]
Revenue		42,188	54,254
Segment cost of revenue and operating expenses	[1],[2]	49,974	58,402
Segment operating income (loss)	[1]	(7,786)	(4,148)
Share-based Compensation		1,613	1,245
Acquisition-related (benefit) expense, net		0	$ 0
Restructuring charges		3,400
Other Income [Member]
Segment Reporting Information [Line Items]
Share-based Compensation		$ 200
Sales Revenue, Net [Member]
Segment Reporting Information [Line Items]
Concentration of risk, percentage		10.00%	0.00%
Switzerland
Segment Reporting Information [Line Items]
Revenue		$ 113,300	$ 117,500
United States
Segment Reporting Information [Line Items]
Revenue		$ 492,600	$ 473,100

[1] Segment cost of revenue and operating expenses and segment operating income (loss) exclude stock-based compensation and acquisition-related (benefit) expense, net. This presentation corresponds to the measure of segment profit or loss that the Company's chief operating decision-maker uses in assessing segment performance and making resource allocation decisions. The following table summarizes the Company's stock-based compensation expense and acquisition-related expense (benefit), net by reportable segment for the three months ended March 31, 2016 and 2015 (in thousands): Three Months Ended March 31, 2016 2015 Stock-based compensation Acquisition-related Stock-based compensation Acquisition-relatedNorth America $27,023 $3,464 $31,252 $(269)EMEA 2,120 — 2,647 —Rest of World 1,613 — 1,245 —Consolidated $30,756 $3,464 $35,144 $(269)

[2] Segment cost of revenue and operating expenses for the three months ended March 31, 2016 includes restructuring charges of $2.9 million in North America (which excludes $2.6 million of stock-based compensation), $3.5 million in EMEA and $3.4 million in Rest of World. See Note 9, "Restructuring," for additional information.

[3] Includes stock-based compensation classified within cost of revenue, marketing expense, selling, general and administrative expense and restructuring charges. Other income (expense), net, includes $0.2 million of additional stock-based compensation for the three months ended March 31, 2016.

[4] 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.