VARIABLE INTEREST ENTITES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Restricted Cash and Cash Equivalents	$ 20,552,000	$ 8,446,000
Accounts receivable, net	347,864,000	553,834,000
Current maturities of securitized utility tariff bonds	27,430,000	20,716,000
Accounts payable	278,056,000	360,493,000
Stockholders' Equity Attributable to Parent	2,765,877,000	2,584,426,000	$ 2,349,532,000	$ 2,233,311,000
Depreciation and amortization	(30,219,000)	(3,521,000)
Discounts and issuance costs for securitized utility tariff bonds, excluding current maturities	5,300,000	5,900,000
Other Assets | US Treasury Securities
Variable Interest Entity [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	6,496,000	4,695,000
Other Assets | Corporate Bond Securities
Variable Interest Entity [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	11,080,000	9,710,000
Other Assets | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities
Variable Interest Entity [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	6,496,000	4,695,000
Other Assets | Fair Value, Inputs, Level 1 [Member] | Corporate Bond Securities
Variable Interest Entity [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	0	0
Other Assets | Fair Value, Inputs, Level 2 [Member] | US Treasury Securities
Variable Interest Entity [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	0	0
Other Assets | Fair Value, Inputs, Level 2 [Member] | Corporate Bond Securities
Variable Interest Entity [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	11,080,000	9,710,000
Other Current Assets
Variable Interest Entity [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	17,576,000	14,405,000
Other Current Assets | Fair Value, Inputs, Level 1 [Member]
Variable Interest Entity [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	6,496,000	4,695,000
Other Current Assets | Fair Value, Inputs, Level 2 [Member]
Variable Interest Entity [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	11,080,000	9,710,000
Other Current Liabilities | Swap
Variable Interest Entity [Line Items]
Financial Instruments, Owned, at Fair Value	13,920,000
Other Current Liabilities | Fair Value, Inputs, Level 1 [Member] | Swap
Variable Interest Entity [Line Items]
Financial Instruments, Owned, at Fair Value	0
Other Current Liabilities | Fair Value, Inputs, Level 2 [Member] | Swap
Variable Interest Entity [Line Items]
Financial Instruments, Owned, at Fair Value	13,920,000
Kansas Gas Service Securitization I LLC
Variable Interest Entity [Line Items]
Restricted Cash and Cash Equivalents	20,552,000	8,446,000
Accounts receivable, net	5,133,000	4,862,000
Finite-Lived Intangible Assets, Net	293,619,000	323,838,000
Current maturities of securitized utility tariff bonds	27,430,000	20,716,000
Accounts payable	394,000	3,204,000
Interest Payable	7,207,000	2,202,000
Securitized utility tariff bonds	282,506,000	309,343,000
Stockholders' Equity Attributable to Parent	1,768,000	1,681,000
Revenues	48,677,000	5,769,000
Utilities Operating Expense	(440,000)	(52,000)
Depreciation and amortization	(30,200,000)	(3,500,000)
Interest Income, Other	696,000	6,000
Interest Expense	(18,552,000)	(2,202,000)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	162,000	$ 0
Finite-Lived Intangible Asset, Expected Amortization, Year Two	29,391,000
Finite-Lived Intangible Asset, Expected Amortization, Year Three	31,025,000
Finite-Lived Intangible Asset, Expected Amortization, Year Four	32,751,000
Finite-Lived Intangible Asset, Expected Amortization, Year Five	34,572,000
Finite-Lived Intangible Asset, Expected Amortization, Year One	$ 27,843,000