Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jul. 31, 2017
Other Commitments [Line Items]
Rent expense	$ 2,800	$ 2,500	$ 5,500	$ 4,700
Operating Leases, Future Minimum Payments Due, Rolling Maturity [Abstract]
Total amount of rent to be paid	55,321		55,321
Operating lease obligations less than one year	212		212
Operating lease obligations one to three years	10,338		10,338
Operating lease obligations three to five years	10,957		10,957
Operating lease obligations more than five years	33,814		33,814
Subsequent Event
Operating Leases, Future Minimum Payments Due, Rolling Maturity [Abstract]
Total amount of rent to be paid					$ 20,200
Cloud Infrastructure Agreements
Purchase Obligation, Fiscal Year Maturity [Abstract]
Purchase obligations	35,654		35,654
Purchase obligations due in less than one year	19,254		19,254
Purchase obligations due one to three years	16,400		16,400
Purchase obligations due three to five years	0		0
Purchase obligations due after year five	$ 0		$ 0