RETIREMENT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Pension Plan
Net periodic benefit cost:
Interest cost	$ 72	$ 64	$ 145	$ 129
Expected return on plan assets	(155)	(137)	(311)	(274)
Amortization of net actuarial loss	0	10	0	20
Net periodic benefit (income) cost	(83)	(63)	(166)	(125)
Other disclosures
Estimated future Pension Plan contributions	0		0
SERP
Net periodic benefit cost:
Interest cost	15	13	30	26
Expected return on plan assets	0	0	0	0
Amortization of net actuarial loss	0	0	0	0
Net periodic benefit (income) cost	15	13	30	26
Post-retirement Medical
Net periodic benefit cost:
Interest cost	0	18	0	36
Expected return on plan assets	0	0	0	0
Amortization of net actuarial loss	0	23	0	46
Net periodic benefit (income) cost	$ 0	$ 41	$ 0	$ 82