Employee Benefit Plans (Summary Of The Status Of Stock-Based Equity Incentives Outstanding) (Details) (USD $)	12 Months Ended
	Jan. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number outstanding at 1/31/14	329,788
Weighted- average remaining contractual life (years)	1 year 1 month 10 days
Weighted- average exercise price	$ 38.31
Number exercisable at 1/31/14	325,111
Weighted- average exercise price	$ 38.09
$21.13 – $21.13
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number outstanding at 1/31/14	33,355
Weighted- average remaining contractual life (years)	4 years 10 months 0 days
Weighted- average exercise price	$ 21.13
Number exercisable at 1/31/14	33,355
Weighted- average exercise price	$ 21.13
Lower range of exercise price	$ 21.13
Upper range of exercise price	$ 21.13
24.69 – 31.63
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number outstanding at 1/31/14	13,963
Weighted- average remaining contractual life (years)	0 years 5 months 0 days
Weighted- average exercise price	$ 27.90
Number exercisable at 1/31/14	13,963
Weighted- average exercise price	$ 27.90
Lower range of exercise price	$ 24.69
Upper range of exercise price	$ 31.63
37.04 – 37.04
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number outstanding at 1/31/14	29,000
Weighted- average remaining contractual life (years)	2 years 2 months 15 days
Weighted- average exercise price	$ 37.04
Number exercisable at 1/31/14	29,000
Weighted- average exercise price	$ 37.04
Lower range of exercise price	$ 37.04
Upper range of exercise price	$ 37.04
37.06 – 40.69
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number outstanding at 1/31/14	32,347
Weighted- average remaining contractual life (years)	1 year 10 months 0 days
Weighted- average exercise price	$ 38.15
Number exercisable at 1/31/14	32,347
Weighted- average exercise price	$ 38.15
Lower range of exercise price	$ 37.06
Upper range of exercise price	$ 40.69
41.08 – 41.08
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number outstanding at 1/31/14	200,410
Weighted- average remaining contractual life (years)	0 years 2 months 15 days
Weighted- average exercise price	$ 41.08
Number exercisable at 1/31/14	200,410
Weighted- average exercise price	$ 41.08
Lower range of exercise price	$ 41.08
Upper range of exercise price	$ 41.08
41.55 – 45.72
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number outstanding at 1/31/14	11,257
Weighted- average remaining contractual life (years)	0 years 10 months 20 days
Weighted- average exercise price	$ 44.89
Number exercisable at 1/31/14	11,257
Weighted- average exercise price	$ 44.89
Lower range of exercise price	$ 41.55
Upper range of exercise price	$ 45.72
48.79 – 54.03
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number outstanding at 1/31/14	9,456
Weighted- average remaining contractual life (years)	5 years 5 months 0 days
Weighted- average exercise price	$ 52.25
Number exercisable at 1/31/14	4,779
Weighted- average exercise price	$ 50.50
Lower range of exercise price	$ 48.79
Upper range of exercise price	$ 54.03