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Property and Equipment (Detail) - Schedule of Property Plant and Equipment (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2013
Jan. 31, 2013
Land and improvements $ 23,893 $ 23,980
Buildings and improvements 37,993 38,056
Machinery, equipment and fixtures 221,666 221,638
Construction in progress 43 39
283,595 283,713
Less: accumulated depreciation (64,767) (60,533)
$ 218,828 $ 223,180