Quarterly report pursuant to Section 13 or 15(d)

FUEL DERIVATIVE CONTRACTS Fair value Fuel Derivative Contracts (Details)

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FUEL DERIVATIVE CONTRACTS Fair value Fuel Derivative Contracts (Details) (Commodity Contract [Member], USD $)
In Millions, unless otherwise specified
Aug. 03, 2013
Aug. 22, 2013
Subsequent Event [Member]
gal
Derivative [Line Items]    
Nonmonetary notional amount   1,400,000
Diesel fuel need in derivative contracts (in hundredths)   20.00%
Derivative fair value $ 0.4