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])
Aug. 02, 2014
gal
Aug. 14, 2014
Subsequent Event [Member]
gal
Derivative [Line Items]    
Nonmonetary notional amount (gallons of diesel) 800,000 800,000
Diesel fuel need in derivative contracts (in hundredths) 20.00% 20.00%