Stock Based Compensation (Schedule Of Restricted Stock Units Activity) (Details)	9 Months Ended
	Oct. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares, Outstanding at January 31, 2013	284,204
Shares, Granted	453,289
Shares, Vested	(154,423)
Shares, Canceled	(27,570)
Shares, Outstanding at July 31, 2013	555,500