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Commitments and contingencies - Schedule of Estimates of Future Commitments (Details) $ in Thousands | Dec. 31, 2024 USD ($)
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Commitments Disclosure [Line Items] |
Year 1 | $ 170,671
Year 2 | 97,433
Year 3 | 76,663
Year 4 | 71,281
Year 5 | 67,828
Thereafter | 361,458
Total | 845,334
Power purchase |
Commitments Disclosure [Line Items] |
Year 1 | 47,201
Year 2 | 12,311
Year 3 | 12,557
Year 4 | 12,805
Year 5 | 13,022
Thereafter | 116,796
Total | 214,692
Natural gas supply and service agreements |
Commitments Disclosure [Line Items] |
Year 1 | 101,486
Year 2 | 73,766
Year 3 | 55,802
Year 4 | 54,066
Year 5 | 51,379
Thereafter | 166,938
Total | 503,437
Service agreements |
Commitments Disclosure [Line Items] |
Year 1 | 17,658
Year 2 | 8,118
Year 3 | 5,004
Year 4 | 1,047
Year 5 | 0
Thereafter | 0
Total | 31,827
Capital projects |
Commitments Disclosure [Line Items] |
Year 1 | 1,100
Year 2 | 0
Year 3 | 0
Year 4 | 0
Year 5 | 0
Thereafter | 0
Total | 1,100
Land easements and other |
Commitments Disclosure [Line Items] |
Year 1 | 3,226
Year 2 | 3,238
Year 3 | 3,300
Year 4 | 3,363
Year 5 | 3,427
Thereafter | 77,724
Total | $ 94,278

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- Definition Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
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