Consolidated Statement of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash Flows From Operating Activities
Net Income and Comprehensive Income	$ 73,627	$ 27,945
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Depreciation and Amortization	4,921	4,363
Deferred Income Taxes	0	7,814
Income from Equity Method Investee	(405)	0
Unit-Based Compensation	333	0
Other Adjustments for Noncash Items Included in Income	191	80
Changes in Operating Assets and Liabilities
(Increase) Decrease in Accounts Receivable	(5,423)	2,734
Increase in Current Income Taxes Payable	0	9,204
Increase (Decrease) in Accounts Payable	1,409	(4,905)
Other Operating Assets and Liabilities, Net	(126)	(226)
Net Cash Provided by Operating Activities	74,527	47,009
Cash Flows From Investing Activities
Additions to Property, Plant and Equipment	(109,449)	(17,120)
Additions to Investments	(68,485)	(147)
Distributions from Cost Method Investee	474	549
Net Cash Used in Investing Activities	(177,460)	(16,718)
Cash Flows From Financing Activities
Distributions to Parent	0	(42,480)
Contributions from Parent	0	1,035
Distributions to Noncontrolling Interests	(19,452)	0
Cash Contributions from Noncontrolling Interests	29,330	0
Proceeds from Revolving Credit Facility	195,000	0
Repayment of Revolving Credit Facility	(5,000)	0
Net Proceeds from Private Placement Offering	138,089	0
Distribution to Noble for Contributed Assets	(245,000)	0
Distributions to Unitholders	(26,848)	0
Repayment of Capital Lease Obligation	(982)	0
Net Cash Provided by (Used in) Financing Activities	65,137	(41,445)
Decrease in Cash and Cash Equivalents	(37,796)	(11,154)
Cash and Cash Equivalents at Beginning of Period	57,421	26,612
Cash and Cash Equivalents at End of Period	$ 19,625	$ 15,458