Condensed Consolidated Statements of Cash Flow - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities:
Net income	$ 41,034	$ 40,350
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	69,777	62,351
Accretion of asset retirement obligation	2,099	1,910
Stock-based compensation	4,911	4,769
Income attributable to sale of tax benefits, net of interest expense	(6,663)	(8,627)
Equity in losses (earnings) of investees	367	(829)
Mark-to-market of derivative instruments	939	813
Disposal of property, plant and equipment	(321)	(312)
Write-off of unsuccessful exploration and storage activities	516	0
Loss (gain) on severance pay fund asset	26	(97)
Loss (gain) on foreign currency exchange rates	(2,416)	741
Deferred income tax provision	(9,401)	(9,683)
Liability for unrecognized tax benefits	209	582
Changes in operating assets and liabilities, net of businesses acquired:
Receivables	(14,645)	57,193
Costs and estimated earnings in excess of billings on uncompleted contracts	8,452	(5,249)
Long-term costs and estimated earnings in excess of billings on uncompleted contracts	(15,122)	0
Inventories	(4,015)	(8,837)
Prepaid expenses and other	(4,571)	(3,710)
Change in operating lease right of use asset	1,165	935
Deposits and other	2,274	262
Accounts payable and accrued expenses	(11,821)	(16,333)
Billings in excess of costs and estimated earnings on uncompleted contracts	28,884	2,707
Liabilities for severance pay	659	(1,141)
Change in operating lease liabilities	(1,060)	(816)
Other long-term liabilities	(3,269)	(1,770)
Net cash provided by operating activities	88,010	115,209
Cash flows from investing activities:
Capital expenditures	(192,602)	(103,386)
Investment in unconsolidated companies	(15,296)	(608)
Cash paid for business acquisition, net of cash acquired	0	(274,631)
Decrease (increase) in severance pay fund asset, net of payments to retired employees	(50)	791
Net cash used in investing activities	(207,948)	(377,834)
Cash flows from financing activities:
Proceeds from long-term loans, net of transaction costs	199,564	331,345
Proceeds from exercise of options by employees	754	55
Proceeds from revolving credit lines with banks	330,000	40,000
Repayment of revolving credit lines with banks	(330,000)	(60,000)
Cash received from noncontrolling interest	10,276	12,251
Repayments of long-term debt	(57,708)	(37,826)
Cash paid to noncontrolling interest	(2,996)	(3,168)
Payments under finance lease obligations	(379)	(352)
Debt issuance costs	(3,385)	(1,118)
Cash dividends paid	(7,273)	(7,243)
Net cash provided by financing activities	138,853	273,944
Effect of exchange rate changes	19	(128)
Net change in cash and cash equivalents and restricted cash and cash equivalents	18,933	11,191
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	205,772	287,770
Cash and cash equivalents and restricted cash and cash equivalents at end of period	224,705	298,961
Supplemental non-cash investing and financing activities:
Change in accounts payable related to purchases of property, plant and equipment	(22,093)	(3,158)
Right of use assets obtained in exchange for new lease liabilities	$ 1,469	$ 1,897