Derivatives (Details) (Commodity Derivatives, Swaps, Oil)	9 Months Ended
Sep. 30, 2014 bbl
Derivatives
Volume (in Bbls or MMBtu)	503,200
4th Quarter 2014
Derivatives
Volume (in Bbls or MMBtu)	503,200
Derivative price per barrel	96.92

Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

Name:	invest_DerivativeNonmonetaryNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant