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Commitments and contingencies - Estimates of Future Commitments (Detail) $ in Thousands | Jun. 30, 2023 USD ($)
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Commitments Disclosure [Line Items] |
Year 1 | $ 281,823
Year 2 | 215,807
Year 3 | 153,863
Year 4 | 113,246
Year 5 | 110,953
Thereafter | 1,093,782
Total | 1,969,474
Power purchase |
Commitments Disclosure [Line Items] |
Year 1 | 83,606
Year 2 | 47,603
Year 3 | 29,461
Year 4 | 12,397
Year 5 | 12,643
Thereafter | 136,244
Total | 321,954
Natural gas supply and service agreements |
Commitments Disclosure [Line Items] |
Year 1 | 93,739
Year 2 | 92,102
Year 3 | 51,456
Year 4 | 38,265
Year 5 | 33,088
Thereafter | 171,141
Total | 479,791
Service agreements |
Commitments Disclosure [Line Items] |
Year 1 | 73,974
Year 2 | 61,943
Year 3 | 58,602
Year 4 | 48,070
Year 5 | 50,529
Thereafter | 285,567
Total | 578,685
Capital projects |
Commitments Disclosure [Line Items] |
Year 1 | 16,537
Year 2 | 0
Year 3 | 0
Year 4 | 0
Year 5 | 0
Thereafter | 0
Total | 16,537
Land easements and others |
Commitments Disclosure [Line Items] |
Year 1 | 13,967
Year 2 | 14,159
Year 3 | 14,344
Year 4 | 14,514
Year 5 | 14,693
Thereafter | 500,830
Total | $ 572,507

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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 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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