Product Warranties (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Movement in Product Warranty Liability [Roll Forward]
Balance, beginning of period	$ 8,545	$ 2,246
Accruals	1,644	1,691
Payments	(2,060)	(1,118)
Balance, end of period	$ 8,129	$ 2,819
Minimum
Product Liability Contingency [Line Items]
Product warranty period	30 days