Revenue Recognition - Schedule of Significant Changes in Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Contractors [Abstract]
Contract assets	$ 0	$ 0
Change in Contract Asset	$ 0
Percent Change in Contract Asset	0.00%
Contract liabilities	$ (7,286)	(7,765)
Change in Contract Liability	$ 479
Percent Change in Contract Liability	(6.20%)
Net contract assets (liabilities)	$ (7,286)	$ (7,765)
Change in Net Contract Assets (Liabilities)	$ 479
Percent Change in Net Contract Assets (Liabilities)	(6.20%)