CONSOLIDATED STATEMENTS OFCASH FLOWS (Parenthetical) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accrued capital expenditures	[1]	$ 18,573	$ 89,810	$ 122,364
Affiliated Entity | Apache
Proceeds from partnership contribution			484,500	$ 505,700
Accrued capital expenditures		$ 1,500	$ 9,100

[1] Includes $1.5 million and $9.1 million of capital expenditures due to Apache for the years ended December 31, 2019 and 2018, respectively, pursuant to the terms of the Construction, Operations, and Maintenance Agreement entered into at the closing of the Business Combination. Refer to Note 3—Transactions with Affiliates for more information.