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Retirement plans Deferred compensation (Tables)
12 Months Ended
Jan. 31, 2014
Deferred compensation [Line Items]  
Deferred Compensation Arrangement with Individual Disclosure, Postretirement Benefits [Table Text Block]
Deferred compensation liability
2013

2012

Current
$189
$163
Long-term
6,509

5,670

Total
$6,698
$5,833
 
 
 
Deferred compensation expense
$519
$484