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Stock-Based Compensation (Summary of SARs Activity) (Details) - Stock Appreciation Rights (SARs) [Member]
3 Months Ended
Apr. 30, 2016
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding at January 30, 2016 | shares 147,550
Forfeited | shares (4,375)
Exercised | shares (2,750)
Outstanding at April 30, 2016 | shares 140,425
Exercisable at April 30, 2016 | shares 45,557
Outstanding at January 30, 2016 | $ / shares $ 24.26
Forfeited | $ / shares 24.26
Exercised | $ / shares 24.26
Outstanding at April 30, 2016 | $ / shares 24.26
Exercisable at April 30, 2016 | $ / shares $ 24.26
Outstanding at April 30, 2016 3 years 10 months 24 days
Exercisable at April 30, 2016 3 years 10 months 24 days