Acquisitions and Divestitures - Schedule of Consideration Paid to Acquire Net Assets and Estimated Values of Net Assets (Parenthetical) (Details) $ / shares in Units, $ in Thousands		3 Months Ended
	Dec. 19, 2014 USD ($) $ / shares $ / bbl $ / Mcf	Sep. 30, 2015
Business Acquisition [Line Items]
Exchange tax rate		34.00%
Earthstone Energy Reverse Acquisition [Member]
Business Acquisition [Line Items]
Closing price of Common Stock | $ / shares	$ 19.08
Exchange tax rate	35.00%
Business combination assets acquired notes payable and accrued interest | $	$ 7,100
Cash | $	$ 2,920
Weighted average commodity prices of oil | $ / bbl	51.62
Weighted average commodity prices of natural gas	4.58
2014 Eagle Ford Properties [Member]
Business Acquisition [Line Items]
Closing price of Common Stock | $ / shares	$ 19.08
Exchange tax rate	34.00%
Weighted average commodity prices of oil | $ / bbl	56.36
Weighted average commodity prices of natural gas	3.36