Product Warranties (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Movement in Product Warranty Liability [Roll Forward]
Balance, beginning of period	$ 8,545	$ 2,246
Accruals	2,132	1,845
Payments	(2,857)	(1,433)
Balance, end of period	$ 7,820	$ 2,658
Minimum
Product Liability Contingency [Line Items]
Product warranty period	30 days