Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 77,795	$ 76,077	$ 101,806
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	198,792	182,972	156,612
Accretion of asset retirement obligation	5,257	3,977	3,232
Stock-based compensation	11,646	9,168	9,830
Income attributable to sale of tax benefits, net of interest expense	(13,153)	(12,201)	(12,090)
Equity in losses (earnings) of investees, net	3,072	2,624	(92)
Mark-to-market of derivative instruments	1,613	741	(1,192)
Loss on disposal of property, plant and equipment	(89)	0	0
Exploration Abandonment and Impairment Expense	828	0	0
Impairment of long-lived assets	32,648	0	0
Loss from prepayment of a long-term loan	1,102	0	0
Loss (gain) on severance pay fund asset	1,019	(1,335)	(893)
Deferred income tax provision	(18,979)	(3,115)	5,102
Liability for unrecognized tax benefits	829	3,760	(12,673)
Other	575	526	338
Changes in operating assets and liabilities, net of businesses acquired:
Receivables	(19,929)	26,738	3,520
Costs and estimated earnings in excess of billings on uncompleted contracts	(6,713)	14,852	13,821
Inventories	5,613	4,127	178
Prepaid expenses and other	4,888	(19,105)	(2,687)
Change in operating lease right of use asset	2,717	3,010	3,825
Deposits and other	2,571	(4,154)	(893)
Accounts payable and accrued expenses	(2,045)	(21,936)	(5,373)
Billings in excess of costs and estimated earnings on uncompleted contracts	(463)	(1,931)	8,424
Liabilities for severance pay	(2,861)	(3,055)	(2)
Change in operating lease liabilities	(3,581)	(2,816)	(3,765)
Other liabilities, net	(2,178)	(102)	(2,023)
Net cash provided by operating activities	280,974	258,822	265,005
Cash flows from investing activities:
Purchase of marketable securities	(19,192)	(60,070)	0
Maturities of marketable securities	32,645	16,272	0
Sale of marketable securities	29,355	0	0
Capital expenditures	(563,476)	(419,272)	(320,738)
Cash received from insurance recoveries	600	0	4,700
Investment in unconsolidated companies	(4,509)	(6,401)	(20,960)
Cash paid for acquisition of a business, net of cash acquired	0	(171,000)	(43,397)
Decrease (increase) in severance pay fund asset, net of payments made to retired employees	1,171	3,189	845
Other investing activities	0	(911)	(6,419)
Net cash used in investing activities	(523,406)	(638,193)	(385,969)
Cash flows from financing activities:
Proceeds from long-term loans, net of transaction costs	135,259	275,000	419,262
Proceeds from exercise of options by employees	39	0	0
Proceeds from issuance of common stock, net of stock issuance costs	0	311	339,471
Proceeds from issuance of convertible notes, net of transaction costs	419,698	0	0
Purchase of capped call instruments	(24,538)	0	0
Purchase of treasury stock	(17,964)	0	0
Proceeds from the sale of limited liability company interest, net of transaction costs	50,330	37,141	0
Repayments of commercial paper and prepayments of long-term debt	(219,126)	0	(50,000)
Proceeds from revolving credit lines with banks	0	0	1,249,400
Repayment of revolving credit lines with banks	0	0	(1,289,950)
Cash received from noncontrolling interest	5,443	5,390	7,577
Repayments of long-term debt and financing liability	(185,163)	(93,046)	(135,384)
Cash paid to noncontrolling interest	(5,880)	(6,903)	(9,739)
Payments under finance lease obligations	(2,983)	(3,181)	(2,890)
Deferred debt issuance costs	(1,699)	(1,341)	(1,798)
Cash dividends paid	(27,143)	(26,986)	(22,471)
Net cash provided by (used in) financing activities	126,273	186,385	503,478
Effect of exchange rate changes on cash and cash equivalents and restricted cash and cash equivalents	(609)	(348)	1,154
Net change in cash and cash equivalents and restricted cash and cash equivalents	(116,768)	(193,334)	383,668
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	343,444	536,778	153,110
Cash and cash equivalents and restricted cash and cash equivalents at end of period	226,676	343,444	536,778
Supplemental disclosure of cash flow information:
Interest, net of interest capitalized	69,132	66,627	60,830
Income taxes, net	29,004	34,357	64,795
Supplemental non-cash investing and financing activities:
Increase (decrease) in accounts payable related to purchases of property, plant and equipment	4,764	7,976	3,148
Right of use assets obtained in exchange for new lease liabilities	8,759	6,175	3,642
Increase in asset retirement cost and asset retirement obligation	$ 7,512	$ 12,153	$ 8,963