RETIREMENT PLANS (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Amounts recognized in the Consolidated Balance Sheets:
Noncurrent liabilities	$ (5,114,000)	$ (5,167,000)
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	7,045,000	6,959,000
Service cost	302,000	298,000
Interest cost	323,000	311,000
Actuarial loss (gain)	352,000	(342,000)
Benefits paid	(261,000)	(174,000)
Administrative expenses paid	(8,000)	(7,000)
Benefit obligation at end of year	7,753,000	7,045,000
Change in Plan Assets:
Fair value of plan assets at beginning of year	4,214,000	4,123,000
Actual return on plan assets	773,000	22,000
Employer contributions	670,000	250,000
Benefits paid	(261,000)	(174,000)
Administrative expenses paid	(8,000)	(7,000)
Fair value of plan assets at end of year	5,388,000	4,214,000
Funded status	(2,365,000)	(2,831,000)
Amounts recognized in the Consolidated Balance Sheets:
Noncurrent liabilities	(2,365,000)	(2,831,000)
Net amount	(2,365,000)	(2,831,000)
Amounts recognized in accumulated other comprehensive income:
Net actuarial loss (gain)	2,559,000	2,765,000
Prior service cost (credit)	93,000	98,000
Accumulated other comprehensive loss	2,652,000	2,863,000
Other disclosures
Expected contributions	250,000
Assumptions used to determine the fiscal year-end benefit obligations:
Discount rate (as a percent)	4.00%	4.75%
Rate of compensation increase (as a percent)	4.00%	5.00%
Assumptions used to determine the net periodic benefit cost:
Discount rate (as a percent)	4.75%	5.00%
Expected return on plan assets (as a percent)	7.00%	7.00%
Rate of compensation increase (as a percent)	5.00%	5.00%
Net periodic benefit cost for the year:
Service cost	302,000	298,000
Interest cost	323,000	311,000
Expected return on plan assets	(327,000)	(296,000)
Amortization of prior service cost (credit)	5,000	5,000
Amortization of net actuarial loss (gain)	112,000	85,000
Net periodic benefit cost	415,000	403,000
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	105,000
Total amount	110,000
Accumulated benefit obligation	6,263,000	5,284,000
Expected Benefit Payments:
Fiscal year ending September 30, 2013	156,000
Fiscal year ending September 30, 2014	206,000
Fiscal year ending September 30, 2015	194,000
Fiscal year ending September 30, 2016	182,000
Fiscal year ending September 30, 2017	256,000
Fiscal years ending September 30, 2018 through 2022	1,751,000
SERP
Change in projected benefit obligation
Benefit obligation at beginning of year	1,310,000	1,195,000
Service cost	50,000	45,000
Interest cost	61,000	58,000
Actuarial loss (gain)	97,000	18,000
Benefits paid	(6,000)	(6,000)
Benefit obligation at end of year	1,512,000	1,310,000
Change in Plan Assets:
Employer contributions	6,000	6,000
Benefits paid	(6,000)	(6,000)
Funded status	(1,512,000)	(1,310,000)
Amounts recognized in the Consolidated Balance Sheets:
Current liabilities	(5,000)	(5,000)
Noncurrent liabilities	(1,507,000)	(1,305,000)
Net amount	(1,512,000)	(1,310,000)
Amounts recognized in accumulated other comprehensive income:
Net actuarial loss (gain)	514,000	434,000
Prior service cost (credit)	(92,000)	(93,000)
Accumulated other comprehensive loss	422,000	341,000
Assumptions used to determine the fiscal year-end benefit obligations:
Discount rate (as a percent)	4.00%	4.75%
Rate of compensation increase (as a percent)	4.00%	5.00%
Assumptions used to determine the net periodic benefit cost:
Discount rate (as a percent)	4.75%	5.00%
Rate of compensation increase (as a percent)	5.00%	5.00%
Net periodic benefit cost for the year:
Service cost	50,000	45,000
Interest cost	61,000	58,000
Amortization of prior service cost (credit)	(1,000)	4,000
Amortization of net actuarial loss (gain)	17,000	14,000
Net periodic benefit cost	127,000	121,000
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	21,000
Total amount	16,000
Accumulated benefit obligation	1,075,000	879,000
Expected Benefit Payments:
Fiscal year ending September 30, 2013	5,000
Fiscal year ending September 30, 2014	4,000
Fiscal year ending September 30, 2015	4,000
Fiscal year ending September 30, 2016	3,000
Fiscal year ending September 30, 2017	2,000
Fiscal years ending September 30, 2018 through 2022	236,000
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	1,031,000	1,365,000
Service cost	12,000	12,000
Interest cost	49,000	51,000
Actuarial loss (gain)	150,000	(397,000)
Benefit obligation at end of year	1,242,000	1,031,000
Change in Plan Assets:
Funded status	(1,242,000)	(1,031,000)
Amounts recognized in the Consolidated Balance Sheets:
Noncurrent liabilities	(1,242,000)	(1,031,000)
Net amount	(1,242,000)	(1,031,000)
Amounts recognized in accumulated other comprehensive income:
Net actuarial loss (gain)	(30,000)	(191,000)
Prior service cost (credit)	148,000	284,000
Accumulated other comprehensive loss	118,000	93,000
Assumptions used to determine the fiscal year-end benefit obligations:
Discount rate (as a percent)	4.00%	4.75%
Assumptions used to determine the net periodic benefit cost:
Discount rate (as a percent)	4.75%	5.00%
Net periodic benefit cost for the year:
Service cost	12,000	12,000
Interest cost	49,000	51,000
Amortization of prior service cost (credit)	136,000	136,000
Amortization of net actuarial loss (gain)	(11,000)	(5,000)
Net periodic benefit cost	186,000	194,000
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)	136,000
Total amount	136,000
Expected Benefit Payments:
Fiscal years ending September 30, 2018 through 2022	276,000
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)	8.50%	9.00%
Ultimate cost trend rate (as a percent)	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	2020	2020
1-Percentage Point Increase
Effect on total service and interest cost components	14,000
Effect on accumulated postretirement benefit obligations	280,000
1-Percentage Point (Decrease)
Effect on total service and interest cost components	(11,000)
Effect on accumulated postretirement benefit obligations	$ (220,000)