Employee Benefit Plans (Schedule Of Stock Options Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares, Outstanding at January 31, 2012	329,788
Shares, Exercised	(287,678)
Shares, Outstanding at January 31, 2013	42,110
Vested and expected to vest at January 31, 2015, Shares	42,110
Exercisable at January 31, 2015, Shares	38,992
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted-average exercise price, Outstanding at January 31, 2012	$ 38.31
Weighted-average exercise price, Exercised	$ 38.95
Weighted-average exercise price, Outstanding at January 31, 2013	$ 33.97
Weighted-average exercise price, vested and expected to vest at January 31, 2015	$ 33.97
Weighted-average exercise price, Exercisable at January 31, 2015	$ 32.37
Weighted-Average remaining contractual term (in years), Outstanding at January 31, 2015	3 years 1 month
Weighted-Average remaining contractual term (in years), Vested and expected to vest at January 31, 2015	3 years 1 month
Weighted-Average remaining contractual term (in years), Exercisable at January 31, 2015	2 years 8 months
Aggregate intrinsic value, Outstanding	$ 974
Aggregate intrinsic value, Vested and expected to vest at January 31, 2015	974
Aggregate intrinsic value, Exercisable at January 31, 2015	$ 964