Commitments and Contingencies (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty liability balance, beginning of the period	$ 2,600	$ 3,328
Product warranty accruals	1,120	1,219
Utilization of accrual	(1,140)	(1,604)
Warranty liability balance, end of the period	2,580	$ 2,943
Product Warranty Accrual, Current	2,000
Product Warranty Accrual, Noncurrent	$ 500		$ 600
Minimum [Member]
Product Warranty Liability [Line Items]
Warranty, Term	12 months
Maximum [Member]
Product Warranty Liability [Line Items]
Warranty, Term	24 months