Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Contract with Customer, Asset, before Allowance for Credit Loss	$ 300,681		$ 300,681		$ 218,822
REVENUE	449,171	$ 402,887	1,254,566	$ 1,290,580
Revenue from Contract with Customer, Including Assessed Tax	441,973	393,940	1,233,907	1,265,010
Retail Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	427,794	384,925	1,194,949	1,212,162
Other non-606 revenue	6,482	7,877	18,457	23,153
Wholesale Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	10,183	7,794	29,503	41,489
Miscellaneous revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,995	1,221	9,454	11,359
Other non-606 revenue	717	1,070	2,203	2,417
RTO Capacity Revenue	97		97	8,155
Electricity [Member]
Disaggregation of Revenue [Line Items]
REVENUE	449,171	402,887	1,254,566	1,290,580
Utility | Retail Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,585	4,253	8,576	13,286
Utility | Retail Revenue [Member] | Residential Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	183,757	162,531		515,920
Utility | Retail Revenue [Member] | Small Commercial and Industrial
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	66,786	58,777		186,313
Utility | Retail Revenue [Member] | Large Commercial and Industrial
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	170,657	156,995		489,190
Utility | Retail Revenue [Member] | Public Lighting
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,009	2,369		7,453
Transmission Revenue | Miscellaneous revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,898	1,221	$ 9,357	$ 3,204
RTO Capacity Revenue		$ 0