Stock-Based Compensation (Summary Of Weighted Average Remaining Contractual Life And The Weighted Average Exercise Prices For Stock Options Both Outstanding And Exercisable) (Details) - Stock Options [Member] shares in Thousands	3 Months Ended
	Apr. 30, 2016 $ / shares shares
$6.08 to $6.35 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding and exercisable, Number of shares | shares	8
Options outstanding and exercisable, Remaining life	4 months 2 days
Options outstanding and exercisable, Exercise price (in dollars per share)	$ 6.22
Exercise price range, lower range limit (in dollars per share)	6.08
Exercise price range, upper range limit (in dollars per share)	$ 6.35
$6.89 to $6.89 [member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding and exercisable, Number of shares | shares	37
Options outstanding and exercisable, Remaining life	18 days
Options outstanding and exercisable, Exercise price (in dollars per share)	$ 6.89
Exercise price range, lower range limit (in dollars per share)	6.89
Exercise price range, upper range limit (in dollars per share)	$ 6.89
$7.66 to $8.19 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding and exercisable, Number of shares | shares	55
Options outstanding and exercisable, Remaining life	1 year
Options outstanding and exercisable, Exercise price (in dollars per share)	$ 8.13
Exercise price range, lower range limit (in dollars per share)	7.66
Exercise price range, upper range limit (in dollars per share)	$ 8.19
$6.08 to $8.19 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding and exercisable, Number of shares | shares	100
Options outstanding and exercisable, Remaining life	7 months 2 days
Options outstanding and exercisable, Exercise price (in dollars per share)	$ 7.52
Exercise price range, lower range limit (in dollars per share)	6.08
Exercise price range, upper range limit (in dollars per share)	$ 8.19