Related Party Transactions - Management - Narrative (Details) - Management - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Equipment, Supplies and Services
Related Party Transaction [Line Items]
Payments, related party	$ 20,700,000	$ 23,800,000	$ 71,800,000	$ 65,300,000
Payables, related party	600,000		600,000		$ 8,900,000
Revenue, related party	800,000	900,000	2,900,000	3,200,000
Receivables, net, related party	300,000		300,000		500,000
Subcontracting Arrangements
Related Party Transaction [Line Items]
Payments, related party	41,100,000	$ 0	86,900,000	$ 600,000
Payables, related party	$ 7,100,000		$ 7,100,000		$ 1,400,000