Long-Term Debt (Details Textuals) (USD $)	3 Months Ended		1 Months Ended	3 Months Ended				3 Months Ended		3 Months Ended		0 Months Ended
	Mar. 31, 2014 Rate	Mar. 31, 2013	Feb. 28, 2013 4 5/8% Senior Subordinated Notes Due 2023 [Member] Rate	Mar. 31, 2014 4 5/8% Senior Subordinated Notes Due 2023 [Member] Rate	Mar. 31, 2013 9 3/4% Senior Subordinated Notes due 2016 [Member]	Jun. 30, 2013 9 1/2% Senior Subordinated Notes due 2016 [Member]	Mar. 31, 2013 9 1/2% Senior Subordinated Notes due 2016 [Member]	Mar. 31, 2014 Bank Credit Agreement [Member] Rate	Mar. 31, 2010 Bank Credit Agreement [Member]	Mar. 31, 2014 Bank Credit Agreement [Member] Minimum [Member] Rate	Mar. 31, 2014 Bank Credit Agreement [Member] Maximum [Member] Rate	Apr. 30, 2014 Subsequent Event [Member] 5 1/2% Senior Subordinated Notes Due 2022 [Member] Rate	May 07, 2014 Subsequent Event [Member] Bank Credit Agreement [Member]
Long Term Debt (Textuals) [Abstract]
Interest in guarantor subsidiaries	100.00%
Face Value of Notes Issued			$ 1,200,000,000									$ 1,250,000,000
Proceeds from issuance of subordinated long term debt, net of commissions and fees				1,180,000,000								1,230,000,000
Debt Instrument, Interest Rate, Stated Percentage				4.625%								5.50%
Selling Price Of Debt Instrument			100.00%									100.00%
Debt Instrument, Repurchased Face Amount					426,400,000	38,200,000	186,700,000
Loss on early extinguishment of debt	0	44,223,000
$1.6 Billion Revolving Credit Facility [Abstract]
Borrowing Base of Denbury credit facility									$ 1,600,000,000				$ 1,600,000,000
Weighted average interest rate on Bank Credit Facility								1.91%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage										0.375%	0.50%