Restructuring Activities - Summary of Restructuring Costs Recognized and Total Restructuring Cost Expected to Recognized (Details) $ in Thousands	Sep. 30, 2015 USD ($)
Restructuring Cost And Reserve [Line Items]
Total Costs Recognized To Date	$ 19,508
Total Expected Program Cost	25,000
Severance and employee-related benefits
Restructuring Cost And Reserve [Line Items]
Total Costs Recognized To Date	15,647
Total Expected Program Cost	21,040
Contract termination costs
Restructuring Cost And Reserve [Line Items]
Total Costs Recognized To Date	10
Total Expected Program Cost	140
Impairment of intangible assets
Restructuring Cost And Reserve [Line Items]
Total Costs Recognized To Date	3,904
Total Expected Program Cost	3,904
Other restructuring costs
Restructuring Cost And Reserve [Line Items]
Total Costs Recognized To Date	(53)
Total Expected Program Cost	$ (84)