Commitments - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Line Items]
Future rental payments, next twelve months	$ 149,099
Future rental payments, due year two	140,029
Future rental payments, due year three	136,909
Future rental payments, due year four	131,894
Future rental payments, due year five	81,647
Commitments for capital expenditures	747,000
Eagle Ford Shale
Commitments and Contingencies Disclosure [Line Items]
Commitments for capital expenditures	31,500
Gulf of Mexico
Commitments and Contingencies Disclosure [Line Items]
Commitments for capital expenditures	711,500
Processing production handling and transportation services
Commitments and Contingencies Disclosure [Line Items]
Future rental payments, next twelve months	149,500
Future rental payments, due year two	131,200
Future rental payments, due year three	112,000
Future rental payments, due year four	99,700
Future rental payments, due year five	76,000
Processing and transportation charges	$ 107,600	$ 117,700	$ 52,200