Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 112,704	$ 94,395
Restricted cash and cash equivalents (primarily related to VIEs)	112,001	111,377
Receivables:
Trade less allowance for credit losses of $249 and $163, respectively (primarily related to VIEs)	173,590	164,050
Other	45,489	50,792
Inventories	42,107	38,092
Costs and estimated earnings in excess of billings on uncompleted contracts	20,940	29,243
Prepaid expenses and other	94,023	59,173
Total current assets	600,854	547,122
Investment in unconsolidated companies	158,618	144,585
Deposits and other	89,021	75,383
Deferred income taxes	165,983	153,936
Property, plant and equipment, net ($3,261,700 and $3,271,248 related to VIEs, respectively)	3,497,915	3,501,886
Construction-in-process ($370,762 and $251,442 related to VIEs, respectively)	844,873	755,589
Operating leases right of use ($13,725 and $13,989 related to VIEs, respectively)	32,232	32,114
Finance leases right of use (none related to VIEs)	2,935	2,841
Intangible assets, net	295,225	301,745
Goodwill	151,291	151,023
Total assets	5,838,947	5,666,224
Current liabilities:
Accounts payable and accrued expenses	201,354	234,334
Commercial paper (less deferred financing costs of $22 and $23, respectively)	99,978	99,977
Billings in excess of costs and estimated earnings on uncompleted contracts	52,198	23,091
Current portion of long-term debt:
Financing liability	5,905	4,093
Operating lease liabilities	3,657	3,633
Finance lease liabilities	1,451	1,375
Total current liabilities	619,223	598,078
Long-term debt, net of current portion:
Limited and non-recourse (primarily related to VIEs and less deferred financing costs of $8,216 and $8,849, respectively)	560,824	578,204
Full recourse (less deferred financing costs of $4,782 and $4,671, respectively)	957,027	822,828
Convertible senior notes (less deferred financing costs of $6,138 and $6,820, respectively)	470,299	469,617
Financing liability	213,810	216,476
Operating lease liabilities	22,722	22,523
Finance lease liabilities	1,544	1,529
Liability associated with sale of tax benefits	144,081	152,292
Deferred income taxes	71,479	68,616
Liability for unrecognized tax benefits	6,481	6,272
Liabilities for severance pay	11,147	10,488
Asset retirement obligation	131,431	129,651
Other long-term liabilities	33,533	29,270
Total liabilities	3,243,601	3,105,844
Commitments and contingencies (Note 9)
Redeemable noncontrolling interest	9,573	9,448
The Company's stockholders' equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 60,662,626 and 60,500,580 issued and outstanding as of March 31, 2025 and December 31, 2024, respectively	61	61
Additional paid-in capital	1,640,910	1,635,245
Treasury stock, at cost (258,667 shares held as of March 31, 2025 and December 31, 2024, respectively)	(17,964)	(17,964)
Retained earnings	847,607	814,518
Accumulated other comprehensive income (loss)	(9,410)	(6,731)
Total stockholders' equity attributable to Company's stockholders	2,461,204	2,425,129
Noncontrolling interest	124,569	125,803
Total equity	2,585,773	2,550,932
Total liabilities, redeemable noncontrolling interest and equity	5,838,947	5,666,224
Variable Interest Entity, Primary Beneficiary
Receivables:
Property, plant and equipment, net ($3,261,700 and $3,271,248 related to VIEs, respectively)	3,261,700	3,271,248
Construction-in-process ($370,762 and $251,442 related to VIEs, respectively)	370,762	251,442
Operating leases right of use ($13,725 and $13,989 related to VIEs, respectively)	13,725	13,989
Finance leases right of use (none related to VIEs)	0	0
Senior Secured Notes
Current portion of long-term debt:
Limited and non-recourse (primarily related to VIEs)	70,453	70,262
Senior Unsecured Bonds
Current portion of long-term debt:
Full recourse	$ 184,227	$ 161,313