Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Property and equipment:
Total property and equipment	$ 2,851,450	$ 2,450,521
Less accumulated depreciation	(343,246)	(254,642)
Property and equipment, net	$ 2,508,204	2,195,879
Midstream LTIP
Stock-Based Compensation
Number of stock-based compensation awards authorized	10,000,000
Land
Property and equipment:
Total property and equipment	$ 14,850	11,338
Fresh water surface pipelines and equipment
Property and equipment:
Useful life	5 years
Total property and equipment	$ 46,183	39,562
Above ground storage tanks
Property and equipment:
Useful life	10 years
Total property and equipment	$ 4,301	4,301
Fresh water permanent buried pipelines and equipment
Property and equipment:
Useful life	20 years
Total property and equipment	$ 472,012	443,453
Gathering systems and facilities
Property and equipment:
Useful life	20 years
Total property and equipment	$ 1,774,221	1,551,771
Construction-in-progress
Property and equipment:
Total property and equipment	$ 539,883	$ 400,096