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RETIREMENT PLANS (Details) (USD $)
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Amounts recognized in the Consolidated Balance Sheets:    
Noncurrent liabilities $ (3,137,000) $ (5,114,000)
Pension Plan
   
Retirement plans    
Period of employee's highest average earnings on which benefits are based 5 years  
Change in projected benefit obligation    
Benefit obligation at beginning of year 7,753,000 7,045,000
Service cost 272,000 302,000
Interest cost 299,000 323,000
Actuarial (gain) loss (1,289,000) 352,000
Benefits paid (169,000) (261,000)
Administrative expenses paid (8,000) (8,000)
Benefit obligation at end of year 6,858,000 7,753,000
Change in Plan Assets:    
Fair value of plan assets at beginning of year 5,388,000 4,214,000
Actual return on plan assets 300,000 773,000
Employer contributions 600,000 670,000
Benefits paid (169,000) (261,000)
Administrative expenses paid (8,000) (8,000)
Fair value of plan assets at end of year 6,111,000 5,388,000
Funded status (747,000) (2,365,000)
Amounts recognized in the Consolidated Balance Sheets:    
Noncurrent liabilities (747,000) (2,365,000)
Net amount (747,000) (2,365,000)
Amounts recognized in accumulated other comprehensive income:    
Net actuarial loss (gain) 1,254,000 2,559,000
Prior service cost (credit) 88,000 93,000
Accumulated other comprehensive loss (income) 1,342,000 2,652,000
Other disclosures    
Expected contributions 600,000  
Assumptions used to determine the fiscal year-end benefit obligations:    
Discount rate (as a percent) 5.00% 4.00%
Rate of compensation increase (as a percent) 4.00% 4.00%
Assumptions used to determine the net benefit costs (years ended):    
Discount rate (as a percent) 4.00% 4.75%
Expected return on plan assets (as a percent) 7.00% 7.00%
Rate of compensation increase (as a percent) 4.00% 5.00%
Net periodic benefit cost for the year:    
Service cost 272,000 302,000
Interest cost 299,000 323,000
Expected return on plan assets (387,000) (327,000)
Amortization of prior service cost (credit) 5,000 5,000
Amortization of net actuarial loss (gain) 103,000 112,000
Net periodic benefit cost 292,000 415,000
Amounts that are estimated to be amortized from accumulated other comprehensive income into net periodic benefit cost in the next fiscal year    
Prior service cost (credit) 5,000  
Net actuarial loss (gain) 37,000  
Total amount 42,000  
Accumulated benefit obligation 5,772,000 6,263,000
Expected Benefit Payments:    
Fiscal year ending September 30, 2014 216,000  
Fiscal year ending September 30, 2015 202,000  
Fiscal year ending September 30, 2016 189,000  
Fiscal year ending September 30, 2017 260,000  
Fiscal year ending September 30, 2018 279,000  
Fiscal years ending September 30, 2019 through 2023 1,996,000  
SERP
   
Change in projected benefit obligation    
Benefit obligation at beginning of year 1,512,000 1,310,000
Service cost 52,000 50,000
Interest cost 58,000 61,000
Actuarial (gain) loss (294,000) 97,000
Benefits paid (6,000) (6,000)
Benefit obligation at end of year 1,322,000 1,512,000
Change in Plan Assets:    
Employer contributions 6,000 6,000
Benefits paid (6,000) (6,000)
Funded status (1,322,000) (1,512,000)
Amounts recognized in the Consolidated Balance Sheets:    
Current liabilities (5,000) (5,000)
Noncurrent liabilities (1,317,000) (1,507,000)
Net amount (1,322,000) (1,512,000)
Amounts recognized in accumulated other comprehensive income:    
Net actuarial loss (gain) 200,000 514,000
Prior service cost (credit) (87,000) (92,000)
Accumulated other comprehensive loss (income) 113,000 422,000
Assumptions used to determine the fiscal year-end benefit obligations:    
Discount rate (as a percent) 5.00% 4.00%
Rate of compensation increase (as a percent) 4.00% 4.00%
Assumptions used to determine the net benefit costs (years ended):    
Discount rate (as a percent) 4.00% 4.75%
Rate of compensation increase (as a percent) 4.00% 5.00%
Net periodic benefit cost for the year:    
Service cost 52,000 50,000
Interest cost 58,000 61,000
Amortization of prior service cost (credit) (5,000) (1,000)
Amortization of net actuarial loss (gain) 20,000 17,000
Net periodic benefit cost 125,000 127,000
Amounts that are estimated to be amortized from accumulated other comprehensive income into net periodic benefit cost in the next fiscal year    
Prior service cost (credit) (5,000)  
Net actuarial loss (gain) 4,000  
Total amount (1,000)  
Accumulated benefit obligation 1,006,000 1,075,000
Expected Benefit Payments:    
Fiscal year ending September 30, 2014 5,000  
Fiscal year ending September 30, 2015 4,000  
Fiscal year ending September 30, 2016 3,000  
Fiscal year ending September 30, 2017 3,000  
Fiscal year ending September 30, 2018 2,000  
Fiscal years ending September 30, 2019 through 2023 382,000  
Postretirement Medical
   
Retirement plans    
Minimum period of service to be attained for being covered under the plan 20 years  
Minimum period of service to be attained at the position of Vice President or higher for being covered under the plan 10 years  
Change in projected benefit obligation    
Benefit obligation at beginning of year 1,242,000 1,031,000
Service cost 14,000 12,000
Interest cost 50,000 49,000
Actuarial (gain) loss (233,000) 150,000
Benefit obligation at end of year 1,073,000 1,242,000
Change in Plan Assets:    
Funded status (1,073,000) (1,242,000)
Amounts recognized in the Consolidated Balance Sheets:    
Noncurrent liabilities (1,073,000) (1,242,000)
Net amount (1,073,000) (1,242,000)
Amounts recognized in accumulated other comprehensive income:    
Net actuarial loss (gain) (263,000) (30,000)
Prior service cost (credit) 12,000 148,000
Accumulated other comprehensive loss (income) (251,000) 118,000
Assumptions used to determine the fiscal year-end benefit obligations:    
Discount rate (as a percent) 5.00% 4.00%
Assumptions used to determine the net benefit costs (years ended):    
Discount rate (as a percent) 4.00% 4.75%
Net periodic benefit cost for the year:    
Service cost 14,000 12,000
Interest cost 50,000 49,000
Amortization of prior service cost (credit) 136,000 136,000
Amortization of net actuarial loss (gain)   (11,000)
Net periodic benefit cost 200,000 186,000
Amounts that are estimated to be amortized from accumulated other comprehensive income into net periodic benefit cost in the next fiscal year    
Prior service cost (credit) 12,000  
Net actuarial loss (gain) (21,000)  
Total amount (9,000)  
Expected Benefit Payments:    
Fiscal year ending September 30, 2018 29,000  
Fiscal years ending September 30, 2019 through 2023 287,000  
Assumed health care cost trend rates related to the measurement of entity's postretirement medical obligations    
Health care cost trend rates assumed for next year (as a percent) 8.00% 8.50%
Ultimate cost trend rate (as a percent) 5.00% 5.00%
Year that the rate reaches the ultimate trend rate 2020 2020
Effects of one-percentage-point change in the assumed health care cost trend rates    
Effect on total service and interest cost components, increase 15,000  
Effect on accumulated postretirement benefit obligations, increase 219,000  
Effect on total service and interest cost components, decrease (12,000)  
Effect on accumulated postretirement benefit obligations, decrease $ (175,000)