Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Disclosure Accrued Liabilities [Abstract]
Accrued payroll and benefits	$ 74,179	$ 79,214
Accrued sales and marketing expenses	15,402	11,970
Accrued sales rebate	11,959	10,342
Accrued sales tax and value added tax	10,211	5,032
Accrued professional fees	7,139	3,604
Accrued income taxes	7,003	4,210
Accrued warranty	5,028	3,841
Other accrued liabilities	27,917	16,119
Total accrued liabilities	$ 158,838	$ 134,332