Revenue from Contracts with Customers Schedule of Contract Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Billed receivables	$ 306,362	$ 311,061
Unbilled receivables	94,454	99,493
Allowance for doubtful accounts	(17,961)	(11,578)
Receivables—net	$ 382,855	$ 398,976

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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