Revenue Recognition - Schedule of Significant Changes in Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Contractors [Abstract]
Contract assets	$ 0	$ 0
Change in Contract Asset	$ 0
Percent Change in Contract Asset	0.00%
Contract liabilities	$ (8,858)	(10,208)
Change in Contract Liability	$ 1,350
Percent Change in Contract Liability	(13.20%)
Net contract assets (liabilities)	$ (8,858)	$ (10,208)
Change in Net Contract Assets (Liabilities)	$ 1,350
Percent Change in Net Contract Assets (Liabilities)	(13.20%)