Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows From Operating Activities
Net Income	$ 188,876	$ 163,636	$ 85,502
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Depreciation and Amortization	65,314	12,953	9,066
Asset Impairment	3,470	0	0
Deferred Income Taxes	0	0	28,288
Income from Equity Method Investee, Net of Dividends	(2,661)	(1,779)	0
Unit-Based Compensation	1,392	790	42
Other Adjustments for Noncash Items Included in Income	739	384	226
Changes in Operating Assets and Liabilities
Increase in Accounts Receivable	(13,863)	(12,293)	(4,637)
Increase (Decrease) in Accounts Payable	(6,919)	1,384	(104)
Other Operating Assets and Liabilities, Net	3,449	1,153	68
Net Cash Provided by Operating Activities	239,797	166,228	118,451
Cash Flows From Investing Activities
Additions to Property, Plant and Equipment	(616,383)	(294,664)	(41,115)
Payments to Acquire Businesses, Net of Cash Acquired	(649,868)	0	0
Additions to Investments	(426)	(68,504)	(147)
Distributions from Cost Method Investee	1,323	973	1,275
Proceeds from Asset Sale — Affiliate	0	0	1,850
Net Cash Used in Investing Activities	(1,265,354)	(362,195)	(38,137)
Cash Flows From Financing Activities
Distributions to Parent	0	0	(42,480)
Contributions from Parent	0	0	1,036
Proceeds from IPO, Net of Cash Offering Costs	0	0	300,625
Distribution to Noble Subsequent to the IPO	0	0	(296,820)
Distributions to Noncontrolling Interests	(9,257)	(21,737)	(10,057)
Cash Contributions from Noncontrolling Interests	605,864	124,684	325
Repayment of Revolving Credit Facility	(802,000)	(240,000)	0
Proceeds from Equity Offerings, Net of Cash Offering Costs	0	312,579	0
Distribution to Noble for Contributed Assets	0	(245,000)	0
Distributions to Unitholders	(86,841)	(59,917)	0
Repayment of Capital Lease Obligation	0	(1,532)	(214)
Debt Issuance Costs and Other	(3,049)	0	(1,920)
Net Cash Provided by (Used in) Financing Activities	981,717	194,077	(49,505)
(Decrease) Increase in Cash, Cash Equivalents, and Restricted Cash	(43,840)	(1,890)	30,809
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	55,531	57,421	26,612
Cash, Cash Equivalents, and Restricted Cash at End of Period	11,691	55,531	57,421
Revolving Credit Facility
Cash Flows From Financing Activities
Borrowings From Credit Facilities	777,000	325,000	0
Term Loan Credit Facility
Cash Flows From Financing Activities
Borrowings From Credit Facilities	$ 500,000	$ 0	$ 0