Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flows From Operating Activities
Net Income (Loss) and Comprehensive Income (Loss)	$ 85,502	$ 38,042	$ (15,091)
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Depreciation and Amortization	9,066	6,891	11,315
Current and Deferred Income Taxes	28,288	23,062	(9,182)
Other Adjustments for Noncash Items Included in Income	268	145	424
Changes in Operating Assets and Liabilities
Increase in Accounts Receivable — Affiliate	(4,637)	(13,250)	0
(Decrease) Increase in Accounts Payable	(104)	14,812	0
Other Operating Assets and Liabilities, Net	68	(308)	0
Net Cash Provided by (Used in) Operating Activities	118,451	69,394	(12,534)
Cash Flows From Investing Activities
Additions to Property, Plant and Equipment	(41,115)	(53,259)	(80,466)
Additions to Investments	(147)	(2,294)	0
Distributions from Investments	1,275	1,092	562
Proceeds from Asset Sale — Affiliate	1,850	0	0
Net Cash Used in Investing Activities	(38,137)	(54,461)	(79,904)
Cash Flows From Financing Activities
Distributions to Parent	(42,480)	0	0
Contributions from Parent	1,036	11,679	92,438
Proceeds from Initial Public Offering, Net of Cash Offering Costs	300,625	0	0
Proceeds from Initial Public Offering Distributed to Noble	(296,820)	0	0
Distributions to Noncontrolling Interests	(10,057)	0	0
Contributions from Noncontrolling Interests	325	0	0
Revolving Credit Facility Origination Fees and Expenses	(1,920)	0	0
Repayment of Capital Lease Obligation	(214)	0
Net Cash (Used in) Provided by Financing Activities	(49,505)	11,679	92,438
Increase in Cash and Cash Equivalents	30,809	26,612	0
Cash and Cash Equivalents at Beginning of Period	26,612	0	0
Cash and Cash Equivalents at End of Period	$ 57,421	$ 26,612	$ 0