Restructuring Activities - Summary of the Activities Associated with Restructuring Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restructuring Cost And Reserve [Line Items]
Liability, Beginning balance			$ 5,374
Charges	$ 906	$ 2,262	1,400	$ 7,643
Cash payments and other non-cash transactions			(4,059)
Liability, Ending balance	2,715		2,715
Severance and employee-related benefits
Restructuring Cost And Reserve [Line Items]
Liability, Beginning balance			5,374
Charges			1,038
Cash payments and other non-cash transactions			(3,697)
Liability, Ending balance	$ 2,715		2,715
Other restructuring costs
Restructuring Cost And Reserve [Line Items]
Charges			362
Cash payments and other non-cash transactions			$ (362)