Acquisitions and Divestitures - Additional Information (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2017 USD ($) a	Dec. 31, 2016 USD ($) a
Eagle Ford Shale
Business Acquisition [Line Items]
Payments to acquire land	$ 1,397,000
Area of land acquired | a	1,067
Gonzales
Business Acquisition [Line Items]
Payments to acquire land	$ 700,000
Area of land acquired | a	526	332
Payments to acquire leases		$ 400,000
La Salle
Business Acquisition [Line Items]
Payments to acquire land	$ 297,000
Area of land acquired | a	267