Accounting Policies And Disclosures Schedule of Error Correction - Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)	$ 184,212	$ (23,757)	$ 471,718	$ 71,171
Impairment of Oil and Gas Properties	164,518	$ 135	241,929	$ 135
Scenario, Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)			409,958
Impairment of Oil and Gas Properties	102,758		180,169
Restatement Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)			61,760
Impairment of Oil and Gas Properties	$ 61,760		$ 61,760