Acquisitions - Additional Information (Details) - USD ($) $ in Millions									1 Months Ended	12 Months Ended
	Sep. 24, 2015	Sep. 22, 2015	Aug. 21, 2015	Aug. 05, 2015	Jul. 15, 2015	Jun. 30, 2015	Jun. 02, 2015	Jan. 02, 2013	Jun. 30, 2015	Dec. 31, 2014	Dec. 31, 2012
Various States | Predecessor
Business Acquisition [Line Items]
Purchase of mineral and royalty interest										$ 2.3
Permian Basin
Business Acquisition [Line Items]
Purchase of mineral and royalty interest		$ 3.4	$ 5.8	$ 20.3	$ 7.8	$ 14.4
Permian Basin | Predecessor
Business Acquisition [Line Items]
Purchase of mineral and royalty interest										16.0
Eagle Ford Shale Play
Business Acquisition [Line Items]
Purchase of mineral and royalty interest	$ 9.2								$ 0.5
Eagle Ford Shale Play | Predecessor
Business Acquisition [Line Items]
Purchase of mineral and royalty interest										11.9
Utica Shale And Marcellus Plays
Business Acquisition [Line Items]
Purchase of mineral and royalty interest							$ 1.8
Haynesville Play | Predecessor
Business Acquisition [Line Items]
Purchase of mineral and royalty interest										$ 24.6
Pure Partners, L.P. and Pure Resources, L.P. (“Pure”) | Predecessor
Business Acquisition [Line Items]
Percentage of interest acquired in business combination											86.40%
Purchased of remaining ownership interest								$ 227.1
Pure Partners, L.P. and Pure Resources, L.P. (“Pure”) | Predecessor | Third-party Investors
Business Acquisition [Line Items]
Percentage of interest acquired in business combination											13.60%