Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Disclosure Accrued Liabilities [Abstract]
Accrued payroll and benefits	$ 55,720	$ 55,430
Accrued sales rebate	8,752	8,486
Accrued sales tax and value added tax	5,339	4,801
Accrued sales and marketing expenses	9,148	7,071
Accrued accounts payable	8,332	13,834
Accrued warranty	2,830	2,638
Accrued professional fees	3,404	2,775
Accrued income taxes	3,385	2,646
Other accrued liabilities	10,595	10,084
Total Accrued Liabilities	$ 107,505	$ 107,765