RETIREMENT PLANS (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Pension Plan
Retirement plans
Service cost	$ 68,000	$ 76,000	$ 136,000	$ 151,000
Interest cost	74,000	81,000	149,000	162,000
Expected return on plan assets	(97,000)	(82,000)	(194,000)	(164,000)
Amortization of prior service cost (credit)	2,000	2,000	3,000	3,000
Amortization of net actuarial loss (gain)	26,000	27,000	52,000	56,000
Net periodic benefit cost	73,000	104,000	146,000	208,000
Contribution by the entity to the Pension Plan			250,000
SERP
Retirement plans
Service cost	13,000	12,000	26,000	25,000
Interest cost	15,000	15,000	29,000	30,000
Amortization of prior service cost (credit)	(2,000)		(3,000)
Amortization of net actuarial loss (gain)	5,000	4,000	10,000	8,000
Net periodic benefit cost	31,000	31,000	62,000	63,000
Postretirement Medical
Retirement plans
Service cost	3,000	3,000	7,000	6,000
Interest cost	13,000	12,000	25,000	24,000
Amortization of prior service cost (credit)	34,000	34,000	68,000	68,000
Amortization of net actuarial loss (gain)		(2,000)		(5,000)
Net periodic benefit cost	$ 50,000	$ 47,000	$ 100,000	$ 93,000