Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Property and equipment:
Total property and equipment	$ 2,538,980	$ 2,450,521
Less accumulated depreciation	(282,178)	(254,642)
Property and equipment, net	$ 2,256,802	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	$ 12,786	11,338
Fresh water surface pipelines and equipment
Property and equipment:
Useful life	5 years
Total property and equipment	$ 40,402	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	$ 462,410	443,453
Gathering systems and facilities
Property and equipment:
Useful life	20 years
Total property and equipment	$ 1,629,761	1,551,771
Construction-in-progress
Property and equipment:
Total property and equipment	$ 389,320	$ 400,096