Basis of Presentation and Significant Accounting Policies (Other Current Assets) (Details) - Successor - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Current Assets [Line Items]
Prepaid expenses	$ 1,903	$ 1,210
California carbon allowance inventories	7,073	38,409
Oil inventories	3,446	4,034
Materials inventories	0	1,747
Deferred financing fees	8,108	0
Receivables from exchanges of properties and divestitures, and other	367	13,859
Other current assets	$ 20,897	$ 59,259