Derivative Activities (Notional Volumes Of Commodity Derivative Contracts) (Details)	12 Months Ended
	Dec. 31, 2013
WTI Swaps - Oil 2014 [Member]
Derivative [Line Items]
Hedged volume per day	6,715
Average price	95.30
WTI Swaps - Oil 2015 [Member]
Derivative [Line Items]
Hedged volume per day	7,356
Average price	93.74
WTI Swaps - Oil 2016 [Member]
Derivative [Line Items]
Hedged volume per day	6,293
Average price	90.03
WTI Swaps - Oil 2017 [Member]
Derivative [Line Items]
Hedged volume per day	5,547
Average price	86.23
LLS Swap - Oil 2014 [Member]
Derivative [Line Items]
Hedged volume per day	3,000
Average price	99.62
WTS/WTI Basis - Oil 2014 [Member]
Derivative [Line Items]
Hedged volume per day	2,400
Average price	(2.10)
WTI Collars - Oil 2014 [Member]
Derivative [Line Items]
Hedged volume per day	425
Average floor price	90.00
Average ceiling price	106.50
WTI Collars - Oil 2015 [Member]
Derivative [Line Items]
Hedged volume per day	1,025
Average floor price	90.00
Average ceiling price	110.00
WTI Collars - Oil 2016 [Member]
Derivative [Line Items]
Hedged volume per day	1,500
Average floor price	80.00
Average ceiling price	102.00
Henry Hub Swaps - Natural Gas 2014 [Member]
Derivative [Line Items]
Hedged volume per day	26,622
Average price	6.18
Henry Hub Swaps - Natural Gas 2015 [Member]
Derivative [Line Items]
Hedged volume per day	7,191
Average price	5.34
Henry Hub Swaps - Natural Gas 2016 [Member]
Derivative [Line Items]
Hedged volume per day	11,350
Average price	4.27
Henry Hub Swaps - Natural Gas 2017 [Member]
Derivative [Line Items]
Hedged volume per day	10,445
Average price	4.47
Henry Hub Basis Swaps - Natural Gas 2014 [Member]
Derivative [Line Items]
Hedged volume per day	17,066	[1]
Average price	(0.19)	[1]
Henry Hub Basis Swaps - Natural Gas 2015 [Member]
Derivative [Line Items]
Hedged volume per day	14,400	[1]
Average price	(0.19)	[1]
Henry Hub Collars - Natural Gas 2014 [Member]
Derivative [Line Items]
Hedged volume per day	4,966
Average floor price	5.74
Average ceiling price	7.51
Henry Hub Collars - Natural Gas 2015 [Member]
Derivative [Line Items]
Hedged volume per day	18,000
Average floor price	5.00
Average ceiling price	7.48
Henry Hub Collars - Natural Gas 2016 [Member]
Derivative [Line Items]
Hedged volume per day	630
Average floor price	4.00
Average ceiling price	5.55
Henry Hub Collars - Natural Gas 2017 [Member]
Derivative [Line Items]
Hedged volume per day	595
Average floor price	4.00
Average ceiling price	6.15
Henry Hub Puts - Natural Gas 2015 [Member]
Derivative [Line Items]
Hedged volume per day	420
Average price	4.00
Henry Hub Puts - Natural Gas 2016 [Member]
Derivative [Line Items]
Hedged volume per day	11,350
Average price	4.00
Henry Hub Puts - Natural Gas 2017 [Member]
Derivative [Line Items]
Hedged volume per day	10,445
Average price	4.00

[1] Our natural gas basis swaps are used to hedge the differential between Henry Hub and various points.