Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accrued Liabilities
Capital expenditures	$ 85,363	$ 105,706
Gathering, compression, processing, and transportation expenses	154,039	134,153
Marketing expenses	28,014	52,612
Interest expense, net	51,281	30,834
Other	48,747	77,545
Total accrued liabilities	$ 367,444	$ 400,850