Revenue from Contracts with Customers - Contract Assets Table (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Change in Contracts with Customer, Asset [Roll Forward]
Contract assets balance at beginning of year		$ 56,344
Additional estimated revenues recognized	$ 4,000	8,536
Contract assets balance at end of year	64,880	64,880
Contract Assets [Abstract]
Other current assets	18,700	18,700	$ 5,338
Other assets	46,180	46,180
Total contract assets from contracts with customers	$ 64,880	$ 64,880	$ 56,344