Revenue Recognition - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Revenue from External Customer [Line Items]
Performance obligation, description of timing	Our subscription contracts are generally 1 to 3 years in length
Unbilled receivables	$ 5,508	$ 5,111
Deferred commissions, amortization period	6 years
Deferred Commissions, Renewal Amortization Period	18 months
Revenue recognized, previously in unearned revenue	$ 3,300
Subscription and support
Revenue from External Customer [Line Items]
Revenue recognized, previously in unearned revenue	51,100
Professional services
Revenue from External Customer [Line Items]
Revenue recognized, previously in unearned revenue	$ 2,300