XML 26 R52.htm IDEA: XBRL DOCUMENT v2.4.0.6
EMPLOYEE BENEFIT PLANS, Change in benefit obligation, change in plan assets and amounts recognized on the balance sheet (Details) (USD $)
12 Months Ended
Jan. 31, 2013
Jan. 31, 2012
Jan. 31, 2011
Change in benefit obligation [Roll Forward]      
Benefit obligation at beginning of year $ 26,059,763 $ 20,675,319  
Service cost 224,138 205,725 211,500
Interest cost 1,088,872 1,121,492 1,118,007
Actuarial loss 940,869 5,371,311  
Administrative expenses (164,722) (259,229)  
Benefits paid (1,102,251) (1,054,855)  
Benefit obligation at end of year 27,046,669 26,059,763 20,675,319
Change in plan assets [Roll Forward]      
Fair value of plan assets at beginning of year 16,343,172 14,807,545  
Actual gain (loss) on plan assets 1,438,608 (148,700)  
Employer contribution 1,674,244 2,998,411  
Administrative expenses (164,722) (259,229)  
Benefits paid (1,102,251) (1,054,855)  
Fair value of plan assets at end of year 18,189,051 16,343,172 14,807,545
Funded status (8,857,618) (9,716,591)  
Unrecognized actuarial loss 13,449,383 13,167,800  
Net amount recognized 4,591,765 3,451,209  
Amounts recognized in the consolidated balance sheets consist of [Abstract]      
Accrued benefit liability - short term (94,591) (94,583)  
Accrued benefit liability - long term (8,763,027) (9,622,008)  
Accumulated other comprehensive loss 13,449,383 13,167,800  
Net amount recognized 4,591,765 3,451,209  
Accumulated benefit obligation in excess of assets 27,046,669 26,059,763  
Projected benefit obligation in excess of assets 27,046,669 26,059,763  
Fair value of plan assets in excess of assets 18,189,051 16,343,172  
Company contributions to pension plans 1,674,244    
Expected additional company contributions in current fiscal year   1,194,591  
Expected future benefit payments [Abstract]      
2014 1,240,819    
2015 1,314,172    
2016 1,369,542    
2017 1,408,435    
2018 1,456,832    
2019-2023 7,707,801    
Total expected future benefits $ 14,497,601    
Weighted average assumptions used in accounting for benefit obligations [Abstract]      
Discount rate (in hundredths) 4.00% 4.25% 5.50%
Expected long-term rate of return on assets (in hundredths) 7.50% 7.50% 8.50%
Weighted average assumptions used in accounting for net projected pension cost [Abstract]      
Discount rate (in hundredths) 4.25% 5.50% 5.75%
Expected long-term rate of return on assets (in hundredths) 7.50% 8.50% 8.50%