Accounts Receivable And Unbilled, Net - Schedule of Accounts Receivable and Unbilled, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 13, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts Notes And Loans Receivable Net Current [Abstract]
Accounts receivable	$ 55,599	$ 48,270
Unbilled	28,153	34,719
Less allowance for doubtful accounts	(673)	(3,222)	$ (3,222)	$ (1,724)	$ (5,855)
Total accounts receivable and unbilled, net	$ 83,079	$ 79,767