Revenue Recognition - Contract Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Capitalized Contract Cost [Line Items]
Contract cost amortization	$ 5,614	$ 1,250
Capitalized contract cost, amortization period	5 years
Bonuses and Commissions
Capitalized Contract Cost [Line Items]
Contract cost assets	$ 4,400		$ 4,700
Contract cost amortization	500	100
Contract Fulfillment Costs
Capitalized Contract Cost [Line Items]
Contract cost assets	29,800		$ 31,800
Contract cost amortization	$ 5,100	$ 1,200