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DEBT - Components of Long-Term Debt (Details) - USD ($) $ in Thousands | Jan. 02, 2026 | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | --- | ---
Line of Credit Facility [Line Items] |  |  |
Permian Transmission Term Loan: Summit Permian Transmission’s variable rate senior secured term loan due January 2028 |  | $ 1,054,998 |
Less: unamortized debt discount and debt issuance costs |  | (9,428) | $ (15,746)
Total debt, net of unamortized debt discount, premium and debt issuance costs |  | 1,045,570 | 993,575
Less: current portion of Permian Transmission Term Loan |  | (21,223) | (16,580)
Total long-term debt |  | 1,024,347 | 976,995
Asset Backed Lending Facility | Line of Credit |  |  |
Line of Credit Facility [Line Items] |  |  |
Amended and Restated ABL Facility: Summit Holdings’ asset based credit facility due July 2029 |  | 113,000 | 305,000
Permian Transmission Term Loan |  |  |
Line of Credit Facility [Line Items] |  |  |
Permian Transmission Term Loan: Summit Permian Transmission’s variable rate senior secured term loan due January 2028 |  | 116,998 |
Permian Transmission Term Loan | Line of Credit |  |  |
Line of Credit Facility [Line Items] |  |  |
Permian Transmission Term Loan: Summit Permian Transmission’s variable rate senior secured term loan due January 2028 |  | 116,998 | 129,321
Permian Transmission Term Loan | Line of Credit | Subsequent Event |  |  |
Line of Credit Facility [Line Items] |  |  |
Principal payment | $ 4,300 |  |
2029 Secured Notes | Term Loan |  |  |
Line of Credit Facility [Line Items] |  |  |
2029 Secured Notes: 8.625% senior secured second lien notes due October 2029 |  | $ 825,000 | $ 575,000
Stated interest rate (as a percent) |  | 8.625% |

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-4 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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