Related Party Transactions - Schedule of Related Party Transactions (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Related Party Transactions [Abstract]
Operating expenses—related parties	$ 1,300,000	$ 1,400,000	$ 2,800,000	$ 2,900,000
Maintenance expenses—related parties	100,000	100,000	200,000	100,000
General and administrative—related parties	3,600,000	3,700,000	7,500,000	7,100,000
Total costs and expenses—related parties	5,000,000.0	5,200,000	10,500,000	10,100,000
BP Products
Related Party Transaction [Line Items]
Deficiency revenue	$ 6,000,000.0	$ 0	$ 6,000,000.0	$ 0.0