Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v2.4.0.8
Subsequent Events (Details) (Subsequent Event [Member], Swap [Member], Natural Gas [Member])
Oct. 31, 2013
Natural Gas Fixed Price Swap, January 2014 Through April 2016 [Member]
 
Derivative [Line Items]  
Notional quantity 30,000
Average fixed price 4.11
Natual Gas Fixed Price Swap, January 2015 Through April 2016 [Member]
 
Derivative [Line Items]  
Notional quantity 40,000
Average fixed price 4.15