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Commitments and contingencies - Estimates of Future Commitments (Detail) $ in Thousands | Dec. 31, 2023 USD ($)
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Commitments Disclosure [Line Items] |
Year 1 | $ 272,222
Year 2 | 182,764
Year 3 | 126,777
Year 4 | 114,300
Year 5 | 112,108
Thereafter | 1,080,214
Total | 1,888,385
Power purchase |
Commitments Disclosure [Line Items] |
Year 1 | 55,312
Year 2 | 33,869
Year 3 | 12,274
Year 4 | 12,520
Year 5 | 12,768
Thereafter | 129,818
Total | 256,561
Natural gas supply and service agreements |
Commitments Disclosure [Line Items] |
Year 1 | 121,188
Year 2 | 71,949
Year 3 | 42,643
Year 4 | 33,215
Year 5 | 30,803
Thereafter | 154,757
Total | 454,555
Service agreements |
Commitments Disclosure [Line Items] |
Year 1 | 73,687
Year 2 | 61,889
Year 3 | 56,591
Year 4 | 53,140
Year 5 | 52,898
Thereafter | 259,510
Total | 557,715
Capital projects |
Commitments Disclosure [Line Items] |
Year 1 | 5,598
Year 2 | 0
Year 3 | 0
Year 4 | 0
Year 5 | 0
Thereafter | 0
Total | 5,598
Land easements and other |
Commitments Disclosure [Line Items] |
Year 1 | 16,437
Year 2 | 15,057
Year 3 | 15,269
Year 4 | 15,425
Year 5 | 15,639
Thereafter | 536,129
Total | $ 613,956

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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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- Definition Amount of contractual obligation to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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- Definition Amount of contractual obligation to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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- Definition Amount of contractual obligation to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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