Quarterly report [Sections 13 or 15(d)]

IMPACT OF ACCOUNTING METHOD CHANGE FOR INVESTMENT TAX CREDITS - Balance Sheet Line Items Impacted By Change (Details)

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IMPACT OF ACCOUNTING METHOD CHANGE FOR INVESTMENT TAX CREDITS - Balance Sheet Line Items Impacted By Change (Details) - USD ($)
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Prepaid expenses and other current assets $ 236,297,000 [1]   $ 257,226,000 $ 260,688,000 [1]
Energy assets, net 2,567,692,000 $ 2,474,300,000 2,373,210,000 2,301,424,000
Deferred income tax assets, net 56,784,000 42,784,000 46,805,000 43,581,000
Subtotal - assets 2,624,476,000 2,517,084,000 2,677,241,000 2,605,693,000
Additional paid-in capital 364,286,000     395,656,000
Retained earnings 903,564,000   864,385,000 884,724,000
Non-controlling interests 398,915,000   45,067,000 42,415,000
Subtotal - equity   1,550,644,000 909,452,000 927,139,000
Subtotal - equity 1,666,765,000      
Original Amount        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Additional paid-in capital   565,164,000    
Retained earnings   688,126,000    
Non-controlling interests   114,353,000    
Original Amount | Change In Accounting Principle, Investment Tax Credits for Energy Assets        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Prepaid expenses and other current assets     236,403,000 239,865,000
Energy assets, net 2,332,547,000 2,236,328,000 2,155,837,000 2,081,224,000
Deferred income tax assets, net 127,545,000 97,576,000 99,338,000 96,868,000
Subtotal - assets 2,460,092,000 2,333,904,000 2,491,578,000 2,417,957,000
Additional paid-in capital 381,921,000 383,218,000    
Retained earnings 738,762,000 688,126,000 678,408,000 696,737,000
Non-controlling interests 381,698,000 296,120,000 45,381,000 42,666,000
Subtotal - equity   1,367,464,000 723,789,000 739,403,000
Subtotal - equity 1,502,381,000      
Effect of Change | Change In Accounting Principle, Investment Tax Credits for Energy Assets        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Prepaid expenses and other current assets     20,823,000 20,823,000
Energy assets, net 235,145,000 237,972,000 217,373,000 220,200,000
Deferred income tax assets, net (70,761,000) (54,792,000) (52,533,000) (53,287,000)
Subtotal - assets 164,384,000 183,180,000 185,663,000 187,736,000
Additional paid-in capital (17,635,000) (17,636,000)    
Retained earnings 164,802,000 183,557,000 185,977,000 187,987,000
Non-controlling interests 17,217,000 17,259,000 (314,000) (251,000)
Subtotal - equity   183,180,000 $ 185,663,000 $ 187,736,000
Subtotal - equity $ 164,384,000      
As Revised        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Additional paid-in capital   383,218,000    
Retained earnings   688,126,000    
Non-controlling interests   296,120,000    
As Revised | Change In Accounting Principle, Investment Tax Credits for Energy Assets        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Additional paid-in capital   365,582,000    
Retained earnings   871,683,000    
Non-controlling interests   $ 313,379,000    
[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at September 30, 2026 and December 31, 2025 of $1,370,551 and $343,142, respectively. Includes liabilities of consolidated VIEs at September 30, 2026 and December 31, 2025 of $760,524 and $180,985, respectively. See Note 13.