Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Inventory
Raw materials	$ 98,072	$ 105,217
Work-in-progress	26,057	29,710
Finished goods	17,805	18,897
Total inventory	141,934	153,824
Other long-term liabilities
Revenue Recognition
Deferred revenue	342,500	324,300
Accrued liabilities
Revenue Recognition
Deferred revenue	269,600	340,500
Other current assets
Revenue Recognition
Deferred expenses	57,500	79,600
Other long term assets
Revenue Recognition
Deferred expenses	$ 77,700	$ 68,900