Preferred Stock Mezzanine Equity (Details) - USD ($) $ in Thousands		6 Months Ended
	Mar. 15, 2017	Jun. 30, 2017		Jun. 30, 2016	[2]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Mezzanine equity at December 31, 2016		$ 0
Issuance of Series A Preferred Stock, net of issuance cost	$ 39,000	37,937	[1]	$ 0
Accumulated dividends on Series A Preferred Stock		1,174
Mezzanine equity at June 30, 2017		39,111
Preferred Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Mezzanine equity at December 31, 2016		0
Issuance of Series A Preferred Stock, net of issuance cost		37,937
Accumulated dividends on Series A Preferred Stock		1,174
Mezzanine equity at June 30, 2017		$ 39,111

[1] Financial information has been recast to include results attributable to the acquisition of Perigee Energy, LLC by an affiliate on February 3, 2017. See Notes 2 and 3 "Basis of Presentation and Summary of Significant Accounting Policies" and "Acquisitions," respectively, for further discussion.

[2] Financial information has been recast to include results attributable to the acquisition of the Major Energy Companies by an affiliate on April 15, 2016. See Notes 2 and 3 "Basis of Presentation and Summary of Significant Accounting Policies" and "Acquisitions," respectively, for further discussion.