Condensed Consolidated Statements of Cash Flow (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 37,738	$ 33,024
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	97,005	85,539
Accretion of asset retirement obligation	2,591	1,911
Stock-based compensation	5,813	4,720
Income attributable to sale of tax benefits, net of interest expense	(11,052)	(9,408)
Equity in losses (earnings) of investees	985	(1,147)
Mark-to-market of derivative instruments	3,911	1,096
Disposal of property, plant and equipment	2	81
Write-off of Storage projects and assets	1,954	0
Loss (gain) on severance pay fund asset	978	105
Loss from prepayment of a long-term loan	1,102	0
Deferred income tax provision	1,584	(4,528)
Liability for unrecognized tax benefits	514	1,494
Other	576	0
Changes in operating assets and liabilities, net of businesses acquired:
Receivables	(646)	9,926
Costs and estimated earnings in excess of billings on uncompleted contracts	(4,131)	10,707
Inventories	(3,768)	6,795
Prepaid expenses and other	(6,424)	(4,866)
Change in operating lease right of use asset	1,586	1,422
Deposits and other	1,583	(319)
Accounts payable and accrued expenses	(15,128)	(37,714)
Billings in excess of costs and estimated earnings on uncompleted contracts	3,459	2,273
Liabilities for severance pay	(1,406)	(1,058)
Change in operating lease liabilities	(1,559)	(1,153)
Other long-term liabilities	(1,977)	(56)
Net cash provided by operating activities	115,290	98,844
Cash flows from investing activities:
Purchase of marketable securities	(19,192)	(47,621)
Maturities of marketable securities	32,645	1,650
Sale of marketable securities	29,355	0
Capital expenditures	(263,439)	(207,888)
Investment in unconsolidated companies	(4,353)	(2,005)
Decrease (increase) in severance pay fund asset, net of payments made to retired employees	(52)	1,352
Net cash used in investing activities	(225,036)	(254,512)
Cash flows from financing activities:
Proceeds from long-term loans, net of transaction costs	75,000	0
Proceeds from exercise of options by employees	42	0
Proceeds from issuance of convertible notes, net of transaction costs	420,400	0
Purchase of capped call instruments	(24,538)	0
Purchase of treasury stock	(17,964)	0
Prepayments of a long-term loan	(219,126)	0
Cash received from noncontrolling interest	5,443	5,390
Repayments of long-term debt	(96,875)	(36,481)
Stock issuance costs reimbursement	0	285
Cash paid to noncontrolling interest	(3,863)	(5,214)
Payments under finance lease obligations	(1,677)	(1,558)
Deferred debt issuance costs	(374)	(232)
Cash dividends paid	(13,458)	(13,166)
Net cash provided by (used in) financing activities	123,010	(50,976)
Effect of exchange rate changes	(327)	(257)
Net change in cash and cash equivalents and restricted cash and cash equivalents	12,937	(206,901)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	343,444	536,778
Cash and cash equivalents and restricted cash and cash equivalents at end of period	356,381	329,877
Supplemental non-cash investing and financing activities:
Increase (decrease) in accounts payable related to purchases of property, plant and equipment	10,982	(4,499)
Right of use assets obtained in exchange for new lease liabilities	$ 2,313	$ 4,673