Stock-Based Compensation (Narrative) (Details) - Restricted Stock [Member] - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	May 01, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (shares)	644,683
Unrecognized compensation expense	$ 18,477
Expected weighted average period of unrecognized compensation expense recognition (years)	2 years 2 months 12 days
Total fair value of shares vested	$ 2,810	$ 3,091
Director Restricted Stock Plan 2008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vested description	Shares granted under the 2008 Director Plan vest 25% on the date of grant and then in equal portions on each of the first three anniversaries of the date of grant.
Vesting period (years)	3 years
Percentage of shares vesting annually (percent)	25.00%
Executive Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (shares)	581,122
Performance Based Grant [Member] | Restricted Stock Plan 2005 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vested description	Shares granted under the 2005 Plan are typically "performance based" and vest over a period of four years, only upon certification by the Compensation Committee of the Board of Directors that the Company has achieved its pre-established performance targets for the fiscal year.
Vesting period (years)	4 years
Non-Performance Based Grant [Member] | Restricted Stock Plan 2005 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vested description	Certain shares granted under the 2005 Plan, however, are "non-performance based" and vest over a period of four years without being subject to the achievement of performance targets.
Vesting period (years)	4 years