Accrued Expenses and Other Liabilities - Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accrued Liabilities and Other Liabilities [Abstract]
Accrued payroll and related	$ 20,462	$ 9,886
Accrued bonus and commission	12,898	8,564
Accrued cost of revenue	47,563	29,901
Sales and other taxes payable	28,592	23,631
ESPP contributions	4,023	2,672
Deferred rent	0	1,418
VAT and other taxes	4,838	2,217
Acquisition holdback	6,520	0
Accrued other expense	22,785	18,054
Total accrued expenses and other current liabilities	$ 147,681	$ 96,343