Condensed Consolidated Statements of Cash Flow - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net income	$ 69,233	$ 64,315
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	139,808	126,152
Accretion of asset retirement obligation	4,201	3,895
Stock-based compensation	9,533	9,845
Income attributable to sale of tax benefits, net of interest expense	(13,431)	(16,519)
Equity in earnings of investees	(406)	(2,061)
Mark-to-market of derivative instruments	(2,404)	1,279
Disposal of property, plant and equipment	(332)	38
Write-off of unsuccessful exploration and storage activities	767	1,379
Write-off of long-lived assets	0	957
Gain on severance pay fund asset	(49)	(43)
Loss (gain) on foreign currency exchange rates	(8,329)	963
Deferred income tax provision	(15,038)	(18,266)
Liability for unrecognized tax benefits	1,311	(1,153)
Changes in operating assets and liabilities, net of businesses acquired:
Receivables	15,865	53,147
Costs and estimated earnings in excess of billings on uncompleted contracts	16,794	(11,352)
Long-term costs and estimated earnings in excess of billings on uncompleted contracts	(29,396)	(5,370)
Inventories	(6,815)	390
Prepaid expenses and other	531	(14,004)
Change in operating lease right of use asset	2,404	1,912
Deposits and other	6,456	287
Accounts payable and accrued expenses	(18,161)	(42,765)
Billings in excess of costs and estimated earnings on uncompleted contracts	12,591	(2,392)
Liabilities for severance pay	1,496	(1,835)
Change in operating lease liabilities	(1,926)	(2,677)
Other long-term liabilities	204	(218)
Net cash provided by operating activities	184,907	145,904
Cash flows from investing activities:
Capital expenditures	(327,426)	(250,225)
Investment in unconsolidated companies	(16,297)	(1,225)
Cash paid for business acquisition, net of cash acquired	(88,650)	(274,632)
Decrease (increase) in severance pay fund asset, net of payments to retired employees	(53)	1,120
Net cash used in investing activities	(432,426)	(524,962)
Cash flows from financing activities:
Proceeds from long-term loans, net of transaction costs	299,339	392,791
Proceeds from exercise of options by employees	0	149
Proceeds related to tax monetization transaction	5,190	0
Proceeds from revolving credit lines with banks	682,000	40,000
Repayment of revolving credit lines with banks	(585,500)	(60,000)
Cash received from noncontrolling interest	10,276	12,251
Repayments of long-term debt	(136,790)	(108,644)
Cash paid to noncontrolling interest	(3,301)	(4,007)
Payments under finance lease obligations	(765)	(687)
Debt issuance costs	(8,964)	(2,073)
Cash dividends paid	(14,555)	(14,587)
Net cash provided by financing activities	246,930	255,193
Effect of exchange rate changes	881	(163)
Net change in cash and cash equivalents and restricted cash and cash equivalents	292	(124,028)
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	206,064	163,742
Supplemental non-cash investing and financing activities:
Change in accounts payable related to purchases of property, plant and equipment	(1,190)	(22,265)
Right of use assets obtained in exchange for new lease liabilities	$ 5,241	$ 3,548