Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total Midstream Services — Affiliate	$ 160,724	$ 87,837	$ 2,086
Direct Operating Expense	29,107	16,933	8,538
Depreciation and Amortization	9,066	6,891	11,315
Income (Loss) Before Income Taxes	113,790	61,268	(24,269)
Total Assets	369,359	305,318	216,512
Additions to Long-Lived Assets	32,584	62,136	79,189
Gathering Systems(1)
Segment Reporting Information [Line Items]
Total Midstream Services — Affiliate	100,723	60,740	2,086
Direct Operating Expense	14,443	13,806	6,450
Depreciation and Amortization	7,361	5,288	9,017
Income (Loss) Before Income Taxes	78,919	41,646	(13,381)
Total Assets	224,861	201,744	156,302
Additions to Long-Lived Assets	30,020	50,858	64,947
Fresh Water Delivery(1)
Segment Reporting Information [Line Items]
Total Midstream Services — Affiliate	60,001	27,097	0
Direct Operating Expense	14,390	2,595	5
Depreciation and Amortization	1,705	1,603	2,298
Income (Loss) Before Income Taxes	43,906	22,899	(2,303)
Total Assets	54,542	49,189	39,211
Additions to Long-Lived Assets	2,564	11,278	14,242
Investments in White Cliffs and Other(1)
Segment Reporting Information [Line Items]
Total Midstream Services — Affiliate	0	0	0
Direct Operating Expense	274	532	2,083
Depreciation and Amortization	0	0	0
Income (Loss) Before Income Taxes	(9,035)	(3,277)	(8,585)
Total Assets	89,956	54,385	20,999
Additions to Long-Lived Assets	$ 0	$ 0	$ 0