Long-Term Debt (Details Textuals) (USD $)	3 Months Ended			9 Months Ended		0 Months Ended		0 Months Ended						1 Months Ended								0 Months Ended			9 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Apr. 30, 2014 5 1/2% Senior Subordinated Notes Due 2022 [Member]	Sep. 30, 2014 5 1/2% Senior Subordinated Notes Due 2022 [Member]	Apr. 30, 2014 5 1/2% Senior Subordinated Notes Due 2022 [Member] Debt Instrument, Redemption, Period One [Member]	Apr. 30, 2014 5 1/2% Senior Subordinated Notes Due 2022 [Member] Debt Instrument, Redemption, Period Two [Member]	Apr. 30, 2014 5 1/2% Senior Subordinated Notes Due 2022 [Member] Debt Instrument, Redemption, Period Three [Member]	Apr. 30, 2014 5 1/2% Senior Subordinated Notes Due 2022 [Member] Debt Instrument, Redemption, Period Four [Member]	Apr. 30, 2014 5 1/2% Senior Subordinated Notes Due 2022 [Member] Initial Redemption Period with Proceeds from Equity Offering [Member]	Apr. 30, 2014 5 1/2% Senior Subordinated Notes Due 2022 [Member] Initial Redemption Period with Make-Whole Premium [Member]	Feb. 28, 2013 4 5/8% Senior Subordinated Notes Due 2023 [Member]	Sep. 30, 2014 4 5/8% Senior Subordinated Notes Due 2023 [Member]	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]	Sep. 30, 2014 8 1/4% Senior Subordinated Notes due 2020 [Member]	May 30, 2014 8 1/4% Senior Subordinated Notes due 2020 [Member]	Apr. 30, 2014 8 1/4% Senior Subordinated Notes due 2020 [Member]	Sep. 30, 2014 Bank Credit Agreement [Member]	May 01, 2014 Bank Credit Agreement [Member]	Mar. 31, 2010 Bank Credit Agreement [Member]	Sep. 30, 2014 Bank Credit Agreement [Member] Minimum [Member]	Sep. 30, 2014 Bank Credit Agreement [Member] Maximum [Member]
Long Term Debt (Textuals) [Abstract]
Interest in guarantor subsidiaries	100.00%			100.00%
Face Value of Notes Issued						$ 1,250,000,000								$ 1,200,000,000							$ 996,273,000
Debt Instrument, Interest Rate, Stated Percentage							5.50%								4.625%				8.25%
Selling Price Of Debt Instrument						100.00%								100.00%
Proceeds from issuance of subordinated long term debt, net of commissions and fees						1,230,000,000								1,180,000,000
Debt Instrument, Redemption Price, Percentage								104.125%	102.75%	101.375%	100.00%	105.50%	100.00%
Debt Instrument, Percentage of Principal Amount Available To Be Redeemed												35.00%	100.00%
Debt Instrument, Repurchased Face Amount																426,400,000	38,200,000	186,700,000		181,100,000	815,200,000
Debt Instrument Redemption Price Percentage Make Whole Premium																				100.00%
Loss on early extinguishment of debt	0	113,900,000	0	113,908,000	44,651,000
$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																						1.90%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage																									0.375%	0.50%