Description of the Business and Summary of Significant Accounting Policies - Deferred Commissions, Net (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Capitalized Contract Cost [Line Items]
Additional contract costs deferred	$ 7,800,000	$ 7,300,000
Deferred contract costs, amortization period	5 years
Amortization of deferred commissions	$ 5,100,000	$ 3,900,000
Impairment loss related to deferred costs	0
Deferred Commissions | Prepaid Expenses and Other Current Assets
Capitalized Contract Cost [Line Items]
Deferred contract costs	22,100,000		$ 19,900,000
Deferred Commissions | Other Assets
Capitalized Contract Cost [Line Items]
Deferred contract costs	$ 44,000,000.0		$ 43,500,000