Revenue Recognition - Contract Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Short-term receivables	$ 105,019	$ 71,707
Long-term receivables	724	709
Short-term contract assets	1,752	1,751
Contract assets (noncurrent)	860	999
Short-term deferred revenue	17,023	19,828
Long-term deferred revenue	1,494	$ 1,330
Contract Assets Rollforward
Contract with customer, assets	2,750
Reclassification to receivables, as the right to consideration becomes unconditional	(246)
Contract assets recognized, net of reclassification to receivables	108
Contract with customer, assets	2,612
Deferred Revenue Rollforward
Contract with customer, liability	21,158
Reclassification to revenue, as a result of performance obligations satisfied	(12,529)
Cash received in advance of satisfaction of performance obligations	9,888
Contract with customer, liability	18,517
Revenue recognized from performed obligations	$ 1,200