Derivatives Derivatives (Details 4-Non Hedges Commodity) (Details) (Not Designated as Hedging Instrument [Member], Commodity Contract [Member])	3 Months Ended
	Sep. 30, 2013
Swap [Member] | West Texas Intermediate [Member]
Exploration and Production Commodity Derivative [Line Items]
Commodity Derivative, Nonmonetary Notional Amount	20,000
Derivative, Swap Type, Average Fixed Price	96.29
Swap [Member] | Brent [Member]
Exploration and Production Commodity Derivative [Line Items]
Commodity Derivative, Nonmonetary Notional Amount	25,000
Derivative, Swap Type, Average Fixed Price	109.19
Option Collar [Member] | West Texas Intermediate [Member]
Exploration and Production Commodity Derivative [Line Items]
Commodity Derivative, Nonmonetary Notional Amount	15,000
Derivative, Average Floor Price	90.00
Derivative, Average Cap Price	101.17
Option Collar [Member] | Brent [Member]
Exploration and Production Commodity Derivative [Line Items]
Commodity Derivative, Nonmonetary Notional Amount	15,000
Derivative, Average Floor Price	100.00
Derivative, Average Cap Price	116.30