Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Disclosure Accrued Liabilities [Abstract]
Accrued payroll and benefits	$ 65,848	$ 55,430
Accrued sales rebate	9,258	8,486
Accrued sales tax and value added tax	6,087	4,801
Accrued sales and marketing expenses	14,303	7,071
Accrued warranty	3,397	2,638
Accrued professional fees	4,947	2,775
Accrued income taxes	5,043	2,646
Other accrued liabilities	23,655	23,918
Total Accrued Liabilities	$ 132,538	$ 107,765