Long-Term Debt (Details Textuals) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended	9 Months Ended		1 Months Ended	0 Months Ended		0 Months Ended	1 Months Ended		9 Months Ended			9 Months Ended
	Sep. 30, 2013 Rate	Sep. 30, 2012	Sep. 30, 2013 Rate	Sep. 30, 2012	Feb. 28, 2013 4 5/8% Senior Subordinated Notes Due 2023 [Member]	Sep. 30, 2013 4 5/8% Senior Subordinated Notes Due 2023 [Member] Rate	Dec. 31, 2012 4 5/8% Senior Subordinated Notes Due 2023 [Member]	Mar. 07, 2013 9.75% Senior Subordinated Notes due 2016 [Member] Rate	Feb. 19, 2013 9.75% Senior Subordinated Notes due 2016 [Member] Rate	Jan. 22, 2013 9.75% Senior Subordinated Notes due 2016 [Member]	Feb. 19, 2013 9.5% Senior Subordinated Notes due 2016 [Member] Rate	May 01, 2013 9.5% Senior Subordinated Notes due 2016 [Member] Rate	Jan. 22, 2013 9.5% Senior Subordinated Notes due 2016 [Member]	Sep. 30, 2013 Bank Credit Agreement [Member] Rate	Oct. 31, 2013 Bank Credit Agreement [Member]	Mar. 31, 2010 Bank Credit Agreement [Member]	Sep. 30, 2013 Bank Credit Agreement [Member] Minimum [Member] Rate	Sep. 30, 2013 Bank Credit Agreement [Member] Maximum [Member] Rate	Sep. 30, 2013 Debt Instrument, Redemption, Period One [Member] 4 5/8% Senior Subordinated Notes Due 2023 [Member] Rate	Sep. 30, 2013 Debt Instrument, Redemption, Period Two [Member] 4 5/8% Senior Subordinated Notes Due 2023 [Member] Rate	Sep. 30, 2013 Debt Instrument, Redemption, Period Three [Member] 4 5/8% Senior Subordinated Notes Due 2023 [Member] Rate	Sep. 30, 2013 Debt Instrument, Redemption, Period Four [Member] 4 5/8% Senior Subordinated Notes Due 2023 [Member] Rate	Sep. 30, 2013 Initial Redemption Period with Proceeds from Equity Offering [Member] 4 5/8% Senior Subordinated Notes Due 2023 [Member] Rate	Sep. 30, 2013 Initial Redemption Period with Make-Whole Premium [Member] 4 5/8% Senior Subordinated Notes Due 2023 [Member] Rate
Long Term Debt (Textuals) [Abstract]
Interest in guarantor subsidiaries	100.00%		100.00%
Face Value of Notes Issued					$ 1,200,000,000
Debt Instrument, Interest Rate, Stated Percentage						4.625%
Selling Price Of Debt Instrument					100.00%
Proceeds from issuance of subordinated long term debt, net of commissions and fees						1,180,000,000
Debt Instrument, Redemption Price, Percentage								104.875%	105.425%		106.869%	104.75%							102.313%	101.542%	100.771%	100.00%	104.625%	100.00%
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed																							35.00%	100.00%
Leverage Ratio Requirement for Restricted Payments						at least 2.5 to 1
Subordinated Debt						1,200,000,000	0			426,400,000			224,900,000
Debt Instrument, Repurchased Face Amount								234,700,000	191,700,000		186,700,000	38,200,000
Loss on early extinguishment of debt	0	0	44,651,000	0
$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														1.70%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage																	0.375%	0.50%