Inventories - Narratives (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Other Inventory, Materials, Supplies and Merchandise under Consignment, Gross		$ 11,800	$ 11,500
Age of consignment inventory purchased by contract manufacturer		365 days
Age of consignment inventory purchased as a result of forecasted demand	180 days
Consignment Inventory with Contract Manufacturer		$ 11,800	8,700
Deferred cost of sales		$ 0	$ 14,113