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Contingencies (Minimum Self Insurance Payments) (Details) (USD $)
In Thousands, unless otherwise specified
Jan. 31, 2014
Self Insurance, Future Estimated Payments Due  
Estimated self insurance payments due in 2014 $ 400
Estimated self insurance payments due in 2015 510
Estimated self insurance payments due in 2016 510
Estimated self insurance payments due in 2017 510
Estimated self insurance payments due in 2018 510
Estimated self insurance payments due thereafter 0
Estimated self insurance payments, gross 2,440
Discount to net present value (15)
Estimated self insurance payments, net $ 2,425