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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Contractual interest rate for funds borrowed, under the debt agreement.

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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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 carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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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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Debt - Short-term and Long-term debt (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Jan. 28, 2026	Dec. 31, 2025	Jun. 01, 2021	Jan. 26, 2021
Long-term:
Unamortized debt issuance costs	$ (20,442)		$ (5,977)
Total long-term debt	2,432,258		1,397,976
Total debt	2,614,258		1,397,976
Commercial Paper
Short-term:
Short-term debt	182,000
Credit Facility
Long-term:
Credit facility	2,700		438,600
Term Loan
Long-term:
Credit facility	1,100,000
Senior notes	1,100,000
7.625% Senior Notes Due 2029
Long-term:
Senior notes			$ 365,353		$ 700,000
Interest rate (as a percent)			7.625%		7.625%
5.375% senior notes due 2030
Long-term:
Senior notes	$ 600,000		$ 600,000	$ 600,000
Interest rate (as a percent)	5.375%		5.375%	5.375%
5.400% senior notes due 2036
Long-term:
Senior notes	$ 750,000	$ 750,000
Interest rate (as a percent)	5.40%	5.40%