Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 79,555	$ 94,395
Restricted cash and cash equivalents (primarily related to VIEs)	126,182	111,377
Receivables:
Trade less allowance for credit losses of $290 and $224, respectively (primarily related to VIEs)	150,066	164,050
Other	38,747	50,792
Inventories	44,604	38,092
Costs and estimated earnings in excess of billings on uncompleted contracts	23,127	29,243
Prepaid expenses and other	42,434	59,173
Total current assets	504,715	547,122
Investment in unconsolidated companies	160,369	144,585
Deposits and other (primarily related to VIEs)	119,873	75,383
Deferred income taxes	159,667	153,936
Property, plant and equipment, net ($3,364,152 and $3,271,248 related to VIEs, respectively)	3,590,567	3,501,886
Construction-in-process ($548,991 and $251,442 related to VIEs, respectively)	1,067,942	755,589
Operating leases right of use ($14,675 and $13,989 related to VIEs, respectively)	35,583	32,114
Finance leases right of use (none related to VIEs)	4,467	2,841
Intangible assets, net	281,804	301,745
Goodwill	167,871	151,023
Total assets	6,092,858	5,666,224
Current liabilities:
Accounts payable and accrued expenses	190,079	234,334
Short term revolving credit lines with banks (full recourse)	35,000	0
Commercial paper (less deferred financing costs of $19 and $23, respectively)	99,981	99,977
Billings in excess of costs and estimated earnings on uncompleted contracts	32,681	23,091
Current portion of long-term debt:
Limited and non-recourse (primarily related to VIEs)	79,313	70,262
Full recourse	201,843	161,313
Financing liability	9,749	4,093
Operating lease liabilities	4,310	3,633
Finance lease liabilities	1,881	1,375
Total current liabilities	654,837	598,078
Long-term debt, net of current portion:
Limited and non-recourse (primarily related to VIEs and less deferred financing costs of $13,208 and $8,849, respectively)	664,321	578,204
Full recourse (less deferred financing costs of $4,359 and $4,671, respectively)	951,912	822,828
Convertible senior notes (less deferred financing costs of $4,774 and $6,820, respectively)	471,663	469,617
Financing liability	206,647	216,476
Operating lease liabilities	25,404	22,523
Finance lease liabilities	2,646	1,529
Liability associated with sale of tax benefits	195,364	152,292
Deferred income taxes	74,404	68,616
Liability for unrecognized tax benefits	7,125	6,272
Liabilities for severance pay	11,378	10,488
Asset retirement obligation	139,443	129,651
Other long-term liabilities	34,857	29,270
Total liabilities	3,440,001	3,105,844
Commitments and contingencies (Note 9)
Redeemable noncontrolling interest	9,904	9,448
The Company's stockholders' equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 60,781,792 and 60,500,580 issued and outstanding as of September 30, 2025 and December 31, 2024, respectively	61	61
Additional paid-in capital	1,649,718	1,635,245
Treasury stock, at cost (258,667 shares held as of September 30, 2025 and December 31, 2024, respectively)	(17,964)	(17,964)
Retained earnings	885,233	814,518
Accumulated other comprehensive income (loss)	(7,251)	(6,731)
Total stockholders' equity attributable to Company's stockholders	2,509,797	2,425,129
Noncontrolling interest	133,156	125,803
Total equity	2,642,953	2,550,932
Total liabilities, redeemable noncontrolling interest and equity	$ 6,092,858	$ 5,666,224