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Debt (Long-term Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2014
Jan. 31, 2014
Apr. 30, 2013
Debt Instrument [Line Items]      
Long-term debt $ 20,586 $ 8,248 $ 18,932
Less current portion 14,586 2,248 12,932
Non-current portion 6,000 6,000 6,000
Revolving Credit Facility [Member]
     
Debt Instrument [Line Items]      
Long-term debt 20,586 8,248 18,932
Other Debt [Member]
     
Debt Instrument [Line Items]      
Long-term debt $ 0 $ 0 $ 0