Restructuring - Restructuring Reserve by Type of Cost (Details) - USD ($) $ in Thousands	3 Months Ended		18 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 6,797	$ 658
Restructuring Plan 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	9,742
Restructuring Plan 2016 | Cost of revenues
Restructuring Cost and Reserve [Line Items]
Restructuring charges	49
Restructuring Plan 2016 | Operating expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,963
Restructuring Plan 2016 | Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges	6,730
Restructuring Plan 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(200)	800
Other Non-Cash Restructuring Charges (Reversals)	(212)	1,505
Cash Restructuring Charges (Reversals)	32	2,033
Pre-tax charges (reversals) related to restructuring	(180)	3,538	$ 60,300
Restructuring Plan 2014 | Cost of revenues
Restructuring Cost and Reserve [Line Items]
Other Non-Cash Restructuring Charges (Reversals)	0	(166)
Cash Restructuring Charges (Reversals)	(14)	180
Pre-tax charges (reversals) related to restructuring	(14)	14
Restructuring Plan 2014 | Operating expenses
Restructuring Cost and Reserve [Line Items]
Other Non-Cash Restructuring Charges (Reversals)	(341)	(1,021)
Cash Restructuring Charges (Reversals)	(21)	1,153
Pre-tax charges (reversals) related to restructuring	(362)	132
Restructuring Plan 2014 | Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Other Non-Cash Restructuring Charges (Reversals)	0	0
Cash Restructuring Charges (Reversals)	67	658
Pre-tax charges (reversals) related to restructuring	67	658
Restructuring Plan 2014 | Other expense
Restructuring Cost and Reserve [Line Items]
Other Non-Cash Restructuring Charges (Reversals)	129	2,692
Cash Restructuring Charges (Reversals)	0	42
Pre-tax charges (reversals) related to restructuring	$ 129	$ 2,734