Employee Benefit Plans (Schedule Of Stock Options Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares, Outstanding at January 31, 2012	502,225
Shares, Exercised	(169,246)
Shares, Canceled	(3,191)
Shares, Outstanding at January 31, 2013	329,788
Vested and expected to vest at January 31, 2013, Shares	329,416
Exercisable at January 31, 2013, Shares	325,111
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	$ 33.33
Weighted-average exercise price, Exercised	$ 23.70
Weighted-average exercise price, Canceled	$ 29.38
Weighted-average exercise price, Outstanding at January 31, 2013	$ 38.31
Weighted-average exercise price,, vested and expected to vest at January 31, 2013	$ 38.29
Weighted-average exercise price, Exercisable at January 31, 2013	$ 38.09
Weighted-Average remaining contractual term (in years), Outstanding at January 31, 2012	1 year 1 month 10 days
Weighted-Average remaining contractual term (in years), Vested and expected to vest at January 31, 2012	1 year 1 month 10 days
Weighted-Average remaining contractual term (in years), Exercisable at January 31, 2012	1 year
Aggregate intrinsic value, Outstanding	$ 5,148
Aggregate intrinsic value, Vested and expected to vest at January 31, 2013	5,148
Aggregate intrinsic value, Exercisable at January 31, 2013	$ 5,148