Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended
	Mar. 15, 2017	Jun. 30, 2017		Jun. 30, 2016	[2]	Dec. 31, 2016
Class of Stock [Line Items]
Preferred stock shares issued (shares)		1,610,000				0
Preferred stock par value per share (in dollars per share)		$ 0.01				$ 0.01
Proceeds from issuance of Series A Preferred Stock, net of issuance costs paid	$ 39,000	$ 37,937	[1]	$ 0
Preferred offering expenses	$ 1,000
Preferred stock shares outstanding (shares)		1,610,000				0
LIBOR
Class of Stock [Line Items]
Preferred stock dividend accrual rate	6.578%
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock shares issued (shares)	1,610,000	1,610,000				0
Preferred stock stated rate (percent)	8.75%
Preferred stock par value per share (in dollars per share)	$ 0.01
Preferred stock liquidation preference (in dollar per share)	25.00
Preferred stock price to the public	25.00
Preferred stock price, net of underwriting discounts and commissions	$ 24.21
Dividend accrual		$ 1,200

[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.