ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (1,182,000)	$ (704,000)	$ (6,527,000)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(479,000)	5,701,000
Other Comprehensive Income (Loss) before Reclassifications, Tax	140,000	(1,669,000)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1,000	122,000
Reclassification from AOCI, Current Period, Tax	0	(36,000)
Other comprehensive income	(478,000)	5,823,000	1,250,000
Amortization of net (gain) loss	1,960,000	17,010,000	45,896,000
Amortization of unrecognized prior service cost	525,000	289,000	(279,000)
Reclassification adjustment, before tax and regulatory adjustments	2,485,000	17,299,000	45,617,000
Regulatory adjustments	(2,484,000)	(17,141,000)	(44,055,000)
Reclassification adjustment, before tax	1,000	158,000	1,562,000
Reclassification adjustment, Tax	0	(36,000)	(390,000)
Reclassification adjustment, net of tax	$ 1,000	$ 122,000	$ 1,172,000