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RELATED PARTY TRANSACTIONS - Leases (Narrative) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023 | Jul. 31, 2023 | Feb. 28, 2022
--- | --- | --- | --- | ---
Related Party Transaction [Line Items] |  |  |  |
Right-of-use assets | $ 220,616 | $ 221,508 |  |
Operating lease, liability | 274,809 | 272,553 |  |
KAEC Lease Agreement | Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Lease initial term (in years) |  |  |  | 25 years
Right-of-use assets | 4,300 | 4,500 |  |
Operating lease, liability | 6,000 | 5,700 |  |
KAFD Lease Agreement | Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Lease initial term (in years) |  |  | 6 years |
Right-of-use assets | 2,100 | 2,300 |  |
Operating lease, liability | $ 2,300 | $ 2,300 |  |

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- Definition Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-3 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
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