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Retirement Plans (Funded Status) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Jan. 31, 2012
Change in Benefit Obligation      
Actuarial losses (gains) $ 1,003    
Change in Plan Assets      
Company contributions 1,800 2,000 1,900
Amounts Recognized in Statement of Financial Position and Operations      
Accumulated other comp. loss (gain) 14,000    
Employee Plan [Member]
      
Change in Benefit Obligation      
Benefit obligation at beg. of year 32,840 29,583  
Service cost 0 0  
Interest cost 1,312 1,299  
Participant contributions 0 0  
Amendments 0 0  
Actuarial losses (gains) 596 3,951  
Plan settlement (2,148) (1,477)  
Benefits paid (531) (516)  
Benefit obligation at end of year 32,069 32,840  
Change in Plan Assets      
Fair value at beg. of year 16,875 14,808  
Actual return on plan assets 2,122 2,035  
Company contributions 1,850 2,025  
Plan settlement (2,148) (1,477)  
Benefits paid (531) (516)  
Fair value at end of year 18,168 16,875  
Unfunded status of the plan (13,901) (15,965)  
Amounts Recognized in Statement of Financial Position      
Current liabilities 0 0  
Non-current liabilities (13,901) (15,965)  
Accrued benefit cost (13,901) (15,965)  
Amounts Recognized in Statement of Financial Position and Operations      
Accrued benefit liability (13,901) (15,965)  
Accumulated other comp. loss (gain) 14,235 16,906  
Net amount recognized 334 941  
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI      
Unrecognized net actuarial loss (gain) 14,235 16,906  
Unamortized prior service costs 0 0  
Net initial asset recognition 0 0  
Net periodic pension expense, included in AOCI 14,235 16,906  
VIP Retirement Plan [Member]
      
Change in Benefit Obligation      
Benefit obligation at beg. of year 8,054 8,079  
Service cost 0 0  
Interest cost 330 352  
Participant contributions 0 0  
Amendments 0 0  
Actuarial losses (gains) (176) 175  
Plan settlement 0 0  
Benefits paid (546) (552)  
Benefit obligation at end of year 7,662 8,054  
Change in Plan Assets      
Fair value at beg. of year 0 0  
Actual return on plan assets 0 0  
Company contributions 546 552  
Plan settlement 0 0  
Benefits paid (546) (552)  
Fair value at end of year 0 0  
Unfunded status of the plan (7,662) (8,054)  
Amounts Recognized in Statement of Financial Position      
Current liabilities (584) (570)  
Non-current liabilities (7,078) (7,484)  
Accrued benefit cost (7,662) (8,054)  
Amounts Recognized in Statement of Financial Position and Operations      
Accrued benefit liability (7,662) (8,054)  
Accumulated other comp. loss (gain) 2,259 2,656  
Net amount recognized (5,403) (5,398)  
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI      
Unrecognized net actuarial loss (gain) 2,259 2,656  
Unamortized prior service costs 0 0  
Net initial asset recognition 0 0  
Net periodic pension expense, included in AOCI 2,259 2,656  
Directors Plan [Member]
      
Change in Benefit Obligation      
Benefit obligation at beg. of year 468 480  
Service cost 0 0  
Interest cost 18 20  
Participant contributions 0 0  
Amendments 0 0  
Actuarial losses (gains) (29) (23)  
Plan settlement 0 0  
Benefits paid (18) (9)  
Benefit obligation at end of year 439 468  
Change in Plan Assets      
Fair value at beg. of year 0 0  
Actual return on plan assets 0 0  
Company contributions 18 9  
Plan settlement 0 0  
Benefits paid (18) (9)  
Fair value at end of year 0 0  
Unfunded status of the plan (439) (468)  
Amounts Recognized in Statement of Financial Position      
Current liabilities (66) (61)  
Non-current liabilities (373) (407)  
Accrued benefit cost (439) (468)  
Amounts Recognized in Statement of Financial Position and Operations      
Accrued benefit liability (439) (468)  
Accumulated other comp. loss (gain) (75) (61)  
Net amount recognized (514) (529)  
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI      
Unrecognized net actuarial loss (gain) (75) (61)  
Unamortized prior service costs 0 0  
Net initial asset recognition 0 0  
Net periodic pension expense, included in AOCI $ (75) $ (61)