LONG-TERM DEBT - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Long-term debt, components
Total debt	$ 3,099,679	$ 3,137,534
Less debt issuance costs	(19,111)	(19,723)
Less debt discounts	(8,605)	(8,678)
Plus debt premiums	10,687	10,896
Total debt adjusted for debt issuance costs, discounts and premiums	3,082,650	3,120,029
Less current maturities	(341,159)	(223,523)
Long-term debt	$ 2,741,491	$ 2,896,506

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt discount.

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Amount, after accumulated amortization, of debt premium.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as current. Excludes lease obligation.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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