Product Warranty Reserves (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Product Warranty Reserves [Abstract]
Product warranty reserve term, minimum			3 months
Standard product warranty term, maximum			1 year
Product warranty reserves [Roll Forward]
Reserve balance, beginning of the period	$ 10,761	$ 14,102	$ 10,032	$ 12,716
Warranty liabilities accrued	3,261	4,304	11,723	12,436
Warranty liabilities settled	(3,828)	(4,804)	(11,499)	(12,051)
Other	(130)	(198)	(192)	303
Reserve balance, end of the period	$ 10,064	$ 13,404	$ 10,064	$ 13,404