Basis of Presentation and Significant Accounting Policies Impairment (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 16, 2013
Successor
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets	$ 0	$ 782,631	$ 253,362
Successor | California operating area [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets		537,511	22
Successor | Uinta Basin operating area [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets		111,339	253,340
Successor | East Texas operating area [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets		78,437	0
Successor | Piceance Basin operating area [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets		$ 55,344	$ 0
Predecessor
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets				$ 0