Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 88,492	$ 94,395
Restricted cash and cash equivalents (primarily related to VIEs)	117,572	111,377
Receivables:
Trade less allowance for credit losses of $275 and $224, respectively (primarily related to VIEs)	154,277	164,050
Other	39,227	50,792
Inventories	44,907	38,092
Costs and estimated earnings in excess of billings on uncompleted contracts	12,926	29,243
Prepaid expenses and other	51,508	59,173
Total current assets	508,909	547,122
Investment in unconsolidated companies	160,178	144,585
Deposits and other (primarily related to VIE’s)	102,483	75,383
Deferred income taxes	176,897	153,936
Property, plant and equipment, net ($3,308,167 and $3,271,248 related to VIEs, respectively)	3,544,564	3,501,886
Construction-in-process ($526,053 and $251,442 related to VIEs, respectively)	1,024,241	755,589
Operating leases right of use ($14,789 and $13,989 related to VIEs, respectively)	35,240	32,114
Finance leases right of use (none related to VIEs)	3,648	2,841
Intangible assets, net	289,061	301,745
Goodwill	170,391	151,023
Total assets	6,015,612	5,666,224
Current liabilities:
Accounts payable and accrued expenses	212,617	234,334
Short term revolving credit lines with banks (full recourse)	96,500	0
Commercial paper (less deferred financing costs of $20 and $23, respectively)	99,980	99,977
Billings in excess of costs and estimated earnings on uncompleted contracts	37,693	23,091
Current portion of long-term debt:
Limited and non-recourse (primarily related to VIEs)	70,570	70,262
Full recourse	201,251	161,313
Financing liability	5,905	4,093
Operating lease liabilities	4,464	3,633
Finance lease liabilities	1,696	1,375
Total current liabilities	730,676	598,078
Long-term debt, net of current portion:
Limited and non-recourse (primarily related to VIEs and less deferred financing costs of $7,833 and $8,849, respectively)	542,437	578,204
Full recourse (less deferred financing costs of $4,665 and $4,671, respectively)	997,139	822,828
Convertible senior notes (less deferred financing costs of $5,456 and $6,820, respectively)	470,981	469,617
Financing liability	213,810	216,476
Operating lease liabilities	25,285	22,523
Finance lease liabilities	2,042	1,529
Liability associated with sale of tax benefits	136,778	152,292
Deferred income taxes	72,544	68,616
Liability for unrecognized tax benefits	7,583	6,272
Liabilities for severance pay	11,984	10,488
Asset retirement obligation	137,266	129,651
Other long-term liabilities	37,314	29,270
Total liabilities	3,385,839	3,105,844
Commitments and contingencies (Note 9)
Redeemable noncontrolling interest	10,985	9,448
The Company's stockholders' equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 60,723,470 and 60,500,580 issued and outstanding as of June 30, 2025 and December 31, 2024, respectively	61	61
Additional paid-in capital	1,644,777	1,635,245
Treasury stock, at cost (258,667 shares held as of June 30, 2025 and December 31, 2024, respectively)	(17,964)	(17,964)
Retained earnings	868,371	814,518
Accumulated other comprehensive income (loss)	(2,297)	(6,731)
Total stockholders' equity attributable to Company's stockholders	2,492,948	2,425,129
Noncontrolling interest	125,840	125,803
Total equity	2,618,788	2,550,932
Total liabilities, redeemable noncontrolling interest and equity	$ 6,015,612	$ 5,666,224