Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue from Contracts with Customers
Revenue	$ 97,224	$ 480	$ 180,721	$ 77,623
Contra revenue charge			8,533	78,053
Volume -Related
Revenue from Contracts with Customers
Revenue	91,266	(10,829)	171,205	57,297
Loss due to changes in fair value	1,100	500	2,100	2,500
Contra revenue charge	4,800	78,100	8,500	78,100
Station construction sales
Revenue from Contracts with Customers
Revenue	5,967	6,071	9,294	10,606
AFTC
Revenue from Contracts with Customers
Revenue	$ (9)	$ 5,238	$ 222	$ 9,720