Acquisitions and Divestitures (Details)				3 Months Ended	4 Months Ended	9 Months Ended	21 Months Ended
	Nov. 22, 2016 USD ($) item	Jul. 05, 2016 USD ($)	Jun. 15, 2016 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)	Jul. 31, 2016
Carnero Processing Acquisition
Business Acquisition [Line Items]
Acquisition membership interest (as percent)	50.00%
Cash payment for acquisition	$ 55,500,000
Capital contribution commitments	24,500,000
Payments to acquire interest in joint venture					$ 12,500,000
Eagle Ford
Business Acquisition [Line Items]
Purchase price	$ 25,016,000
Carnero Gathering LLC, Joint Venture
Business Acquisition [Line Items]
Ownership interest (as a percent)		50.00%						50.00%
Payments to acquire interest in joint venture		$ 37,000,000		$ 100,000		$ 3,500,000	$ 3,500,000
Assumption of capital commitments in joint venture		$ 7,400,000
TPL South Tex Processing Company LP
Business Acquisition [Line Items]
Ownership interest (as a percent)	50.00%	50.00%
SN Cotulla Assets, LLC and SN Palmetto, LLC
Business Acquisition [Line Items]
Producing wellbores | item	23
SN Cotulla Assets, LLC and SN Palmetto, LLC | Eagle Ford
Business Acquisition [Line Items]
Cash payment for acquisition	$ 24,200,000
Producing wellbores | item	11
Closing adjustments	$ 2,800,000
Gateway Resources U.S.A., Inc.
Business Acquisition [Line Items]
Proceeds from divestiture of business			$ 7,120
Loss on disposition of intangible assets			$ 200,000