Condensed Consolidated Statements of Cash Flow (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income	$ 33,461	$ 22,793
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	53,161	48,108
Accretion of asset retirement obligation	1,532	1,230
Stock-based compensation	2,990	2,814
Income attributable to sale of tax benefits, net of interest expense	(7,645)	(4,603)
Equity in earnings of investees	(271)	(577)
Mark-to-market of derivative instruments	993	277
Disposal of property, plant and equipment	(123)	(109)
Write-off of Energy Storage projects and assets	0	1,826
Loss (gain) on severance pay fund asset	(116)	161
Deferred income tax provision	501	2,805
Liability for unrecognized tax benefits	22	304
Other	0	328
Changes in operating assets and liabilities, net of businesses acquired:
Receivables	(26,626)	5,127
Costs and estimated earnings in excess of billings on uncompleted contracts	(731)	(1,830)
Inventories	(22,615)	(4,443)
Prepaid expenses and other	(15,903)	(7,179)
Change in operating lease right of use asset	720	692
Deposits and other	(22)	839
Accounts payable and accrued expenses	22,226	13,082
Billings in excess of costs and estimated earnings on uncompleted contracts	15,866	1,716
Liabilities for severance pay	(439)	(142)
Change in operating lease liabilities	(289)	(547)
Other long-term liabilities	(236)	(896)
Net cash provided by operating activities	56,456	81,776
Cash flows from investing activities:
Purchase of marketable securities	0	(19,192)
Maturities of marketable securities	0	19,290
Capital expenditures	(106,877)	(137,246)
Investment in unconsolidated companies	(4,235)	(2,157)
Decrease (increase) in severance pay fund asset, net of payments made to retired employees	(65)	(27)
Net cash used in investing activities	(111,177)	(139,332)
Cash flows from financing activities:
Proceeds from long-term loans, net of transaction costs	99,850	0
Proceeds from exercise of options by employees	27	99
Cash received from noncontrolling interest	7,341	5,443
Repayments of long-term debt	(42,814)	(39,058)
Proceeds from issuance of common stock, net of related costs	297,121	0
Cash paid to noncontrolling interest	(2,985)	(3,374)
Payments under finance lease obligations	(570)	(828)
Deferred debt issuance costs	(857)	(276)
Cash dividends paid	(6,732)	(6,727)
Net cash provided by (used in) financing activities	350,381	(44,721)
Effect of exchange rate changes	(14)	(34)
Net change in cash and cash equivalents and restricted cash and cash equivalents	295,646	(102,311)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	226,676	343,444
Cash and cash equivalents and restricted cash and cash equivalents at end of period	522,322	241,133
Supplemental non-cash investing and financing activities:
Increase (decrease) in accounts payable related to purchases of property, plant and equipment	(1,221)	8,448
Right of use assets obtained in exchange for new lease liabilities	$ 1,028	$ 1,313