Restructuring Costs - Summary of Activity of Restructuring Reserves (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Restructuring Cost And Reserve [Line Items]
Beginning balance	$ 27,328
Additions to the reserve, net	7,250
Interest accretion	252
Non-cash adjustments	(2)
Cash payments	(10,311)
Ending balance	24,517
Severance / Other
Restructuring Cost And Reserve [Line Items]
Beginning balance	8,072
Additions to the reserve, net	5,917
Cash payments	(7,446)
Ending balance	6,543
Facilities
Restructuring Cost And Reserve [Line Items]
Beginning balance	18,455
Additions to the reserve, net	1,333
Interest accretion	252
Non-cash adjustments	(2)
Cash payments	(2,064)
Ending balance	17,974
Other
Restructuring Cost And Reserve [Line Items]
Beginning balance	801
Cash payments	$ (801)