Derivative Financial Instruments (Schedule Of Oil Derivative Contracts Volume And Weighted Average Prices) (Details) - Jun. 30, 2015 - Subsequent Event Type [Domain]		bbl / d $ / bbl
Rollfactor Swap Contracts [Member]
Derivative [Line Items]
NYMEX swap multiple, second nearby month		0.6667
NYMEX swap multiple, third nearby month		0.3333
Oil contracts [Member] | Collar Contracts With Short Puts for Current Year [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl / d	[1],[2]	15,000
Oil contracts [Member] | Collar Contracts With Short Puts for Year 2 [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl / d	[1],[2]	100,514
Oil contracts [Member] | Collar Contracts With Short Puts for Year 3 [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl / d	[1]	15,000
Oil contracts [Member] | Collar Contracts With Short Puts for Year 2 - Extendible for Year 3 [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl / d		5,000
Oil contracts [Member] | Swap Contracts for Current Year [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl / d		82,000
Oil contracts [Member] | Swap Contracts for Year 2 [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl / d		0
Oil contracts [Member] | Swap Contracts for Year 3 [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl / d		0
Oil contracts [Member] | Rollfactor Swap Contracts for Current Year [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl / d		37,000
Oil contracts [Member] | Rollfactor Swap Contracts for Year 2 [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl / d		0
Oil contracts [Member] | Rollfactor Swap Contracts for Year 3 [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl / d		0
Oil contracts, price per bbl [Member] | Collar Contracts With Short Puts for Current Year [Member]
Derivative [Line Items]
Derivative, Average Cap Price		97.69
Derivative, Average Floor Price		82.97
Oil contracts, price per bbl [Member] | Collar Contracts With Short Puts for Current Year [Member] | Short Put [Member]
Derivative [Line Items]
Derivative, Notional Amount, Price Per Unit		69.67
Oil contracts, price per bbl [Member] | Collar Contracts With Short Puts for Year 2 [Member]
Derivative [Line Items]
Derivative, Average Cap Price		77.21
Derivative, Average Floor Price		66.92
Oil contracts, price per bbl [Member] | Collar Contracts With Short Puts for Year 2 [Member] | Short Put [Member]
Derivative [Line Items]
Derivative, Notional Amount, Price Per Unit		47.58
Oil contracts, price per bbl [Member] | Collar Contracts With Short Puts for Year 3 [Member]
Derivative [Line Items]
Derivative, Average Cap Price		73.01
Derivative, Average Floor Price		65.00
Oil contracts, price per bbl [Member] | Collar Contracts With Short Puts for Year 3 [Member] | Short Put [Member]
Derivative [Line Items]
Derivative, Notional Amount, Price Per Unit		55.00
Oil contracts, price per bbl [Member] | Collar Contracts With Short Puts for Year 2 - Extendible for Year 3 [Member]
Derivative [Line Items]
Derivative, Average Cap Price		100.08
Derivative, Average Floor Price		90.00
Oil contracts, price per bbl [Member] | Collar Contracts With Short Puts for Year 2 - Extendible for Year 3 [Member] | Short Put [Member]
Derivative [Line Items]
Derivative, Notional Amount, Price Per Unit		80.00
Oil contracts, price per bbl [Member] | Swap Contracts for Current Year [Member]
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price		71.18
Oil contracts, price per bbl [Member] | Swap Contracts for Year 2 [Member]
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price		0.00
Oil contracts, price per bbl [Member] | Swap Contracts for Year 3 [Member]
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price		0.00
Oil contracts, price per bbl [Member] | Rollfactor Swap Contracts for Current Year [Member]
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	[3]	0.06
Oil contracts, price per bbl [Member] | Rollfactor Swap Contracts for Year 2 [Member]
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	[3]	0.00
Oil contracts, price per bbl [Member] | Rollfactor Swap Contracts for Year 3 [Member]
Derivative [Line Items]
Derivative, Notional Amount, Price Per Unit		0.00

[1] (a)Counterparties have the option to extend for an additional year 5,000 Bbls per day of 2015 collar contracts with short puts with a ceiling price of $100.08 per Bbl, a floor price of $90.00 per Bbl and a short put price of $80.00 per Bbl. The option to extend is exercisable on December 31, 2015. These contracts give the counterparties the option to extend the contracts under the same terms for an additional year if the option to extend is exercised by the counterparties on December 31, 2015.

[2] .

[3] Represents swaps that fix the difference between (i) each day's price per Bbl of WTI for the first nearby month less (ii) the price per Bbl of WTI for the second nearby NYMEX month, multiplied by .6667; plus (iii) each day's price per Bbl of WTI for the first nearby month less (iv) the price per Bbl of WTI for the third nearby NYMEX month, multiplied by .3333.