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REGULATORY ASSETS (Details) $ in Millions	9 Months Ended
REGULATORY ASSETS (Details) $ in Millions	Sep. 30, 2025 USD ($)
REGULATORY ASSETS [Abstract]
Reclassification of deferred acquisition costs from net utility plant	$ 3.7
Reclassification of deferred acquisition costs from contributions in aid of construction	0.1
Unrecovered reserve for depreciation	$ 4.3
Unrecovered reserve for depreciation (general plant assets)	5 years