Quarterly report pursuant to Section 13 or 15(d)

FUEL DERIVATIVE CONTRACTS Fair value Fuel Derivative Contracts (Details)

v2.4.0.6
FUEL DERIVATIVE CONTRACTS Fair value Fuel Derivative Contracts (Details) (Commodity Contract [Member], USD $)
In Millions, unless otherwise specified
May 04, 2013
gal
Apr. 28, 2012
gal
May 23, 2013
Subsequent Event [Member]
gal
Derivative [Line Items]      
Nonmonetary notional amount 700,000 1,400,000 2,200,000
Diesel fuel need in derivative contracts (in hundredths) 19.00% 41.00% 20.00%
Derivative fair value $ 0.2