RETIREMENT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Pension Plan
Net periodic benefit cost:
Service cost	$ 65	$ 51
Interest cost	91	87
Expected return on plan assets	(112)	(125)
Amortization of prior service cost (credit)	1	1
Amortization of net actuarial loss (gain)	34	21
Net periodic benefit cost	79	35
Other disclosures
Contribution by the entity to the Pension Plan	350
Defined Benefit Plans, Estimated Future Employer Contributions	400
SERP
Net periodic benefit cost:
Service cost	16	15
Interest cost	20	18
Amortization of prior service cost (credit)	(1)	(1)
Amortization of net actuarial loss (gain)	5	6
Net periodic benefit cost	40	38
Postretirement Medical
Net periodic benefit cost:
Service cost	0	0
Interest cost	14	13
Amortization of prior service cost (credit)	0	0
Amortization of net actuarial loss (gain)	0	(1)
Net periodic benefit cost	$ 14	$ 12