Restructuring Activities - Summary of the Activities Associated with Restructuring Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost And Reserve [Line Items]
Liability, Beginning balance			$ 2,401
Charges	$ 501	$ 4,653	9,510	$ 7,379
Cash payments and other non-cash transactions			(6,806)
Liability, Ending balance	5,105		5,105
Severance and employee-related benefits
Restructuring Cost And Reserve [Line Items]
Liability, Beginning balance			2,401
Charges			9,510
Cash payments and other non-cash transactions			(6,806)
Liability, Ending balance	$ 5,105		$ 5,105