Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands		Tungsten [Member] Common Stock [Member]	Tungsten [Member] Additional Paid-in Capital [Member]	Tungsten [Member] Retained Earnings [Member]	Tungsten [Member] AOCI Attributable to Parent [Member]	Tungsten [Member] Parent [Member]	Tungsten [Member] Noncontrolling Interest [Member]	Tungsten [Member]	Cross Currency Interest Rate Contract [Member] Common Stock [Member]	Cross Currency Interest Rate Contract [Member] Additional Paid-in Capital [Member]	Cross Currency Interest Rate Contract [Member] Retained Earnings [Member]	Cross Currency Interest Rate Contract [Member] AOCI Attributable to Parent [Member]	Cross Currency Interest Rate Contract [Member] Parent [Member]	Cross Currency Interest Rate Contract [Member] Noncontrolling Interest [Member]	Cross Currency Interest Rate Contract [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Noncontrolling Interest [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Parent [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Noncontrolling Interest [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2018																														50,700
Balance in Other comprehensive income (loss) beginning of period at Dec. 31, 2018																														$ 51	$ 901,363	$ 422,164	$ (3,799)	$ 1,319,779	$ 125,259	$ 1,445,038
Stock-based compensation																														$ 0	9,358	0	0	9,358	0	9,358
Exercise of options by employees and directors (*) (in shares)																														332
Exercise of options by employees and directors (*)	[1]																													$ 0	2,429	0	0	2,429	0	2,429
Cash paid to noncontrolling interest																														0	0	0	0	0	(8,329)	(8,329)
Cash dividend declared																														0	0	(22,386)	0	(22,386)	0	(22,386)
Increase in noncontrolling interest		$ 0	$ 0	$ 0	$ 0	$ 0	$ 2,072	$ 2,072
Purchase of U.S. Geothermal																														0	0	0	0	0	0	0
Net income																														0	0	88,095	0	88,095	4,316	92,411
Foreign currency translation adjustments																														0	0	0	(1,482)	(1,482)	(328)	(1,810)
Change in respect of derivative instruments designated for cash flow hedge									$ 0	$ 0	$ 0	$ 75	$ 75	$ 0	$ 75
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment																														0	0	0	(3,417)	(3,417)	0	(3,417)
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge																														$ 0	0	0	(31)	(31)	0	(31)
Other																																				44
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax)																																				0
Balance (in shares) at Dec. 31, 2019																							51,032							51,032
Balance in Other comprehensive income (loss) end of period at Dec. 31, 2019																$ 0	$ 0	$ (755)	$ 0	$ (755)	$ 0	$ (755)	$ 51	$ 913,150	$ 487,118	$ (8,654)	$ 1,391,665	$ 122,990	$ 1,514,655	$ 51	913,150	487,873	(8,654)	1,392,420	122,990	1,515,410
Stock-based compensation																														$ 0	9,830	0	0	9,830	0	9,830
Exercise of options by employees and directors (*) (in shares)																														178
Exercise of options by employees and directors (*)	[1]																													$ 0	0	0	0	0	0	0
Cash paid to noncontrolling interest																														0	0	0	0	0	(6,756)	(6,756)
Cash dividend declared																														0	0	(22,471)	0	(22,471)	0	(22,471)
Increase in noncontrolling interest																														0	0	0	0	0	2,754	2,754
Net income																														0	0	85,456	0	85,456	15,020	100,476
Foreign currency translation adjustments																														0	0	0	2,369	2,369	1,444	3,813
Change in respect of derivative instruments designated for cash flow hedge									0	0	0	3,366	3,366	0	3,366
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment																														$ 0	0	0	(3,975)	(3,975)	0	(3,975)
Common stock issuance (in shares)																														4,773
Common stock issuance																														$ 5	339,466	0	0	339,471	0	339,471
Other																														$ 0	0	0	274	274	0	274
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax)																																				0
Balance (in shares) at Dec. 31, 2020																														55,983
Balance in Other comprehensive income (loss) end of period at Dec. 31, 2020																														$ 56	1,262,446	550,103	(6,620)	1,805,985	135,452	1,941,437
Stock-based compensation																														$ 0	9,168	0	0	9,168	0	9,168
Exercise of options by employees and directors (*) (in shares)																														73
Exercise of options by employees and directors (*)	[1]																													$ 0	0	0	0	0	0	0
Cash paid to noncontrolling interest																														0	0	0	0	0	(5,507)	(5,507)
Cash dividend declared																														0	0	(26,986)	0	(26,986)	0	(26,986)
Increase in noncontrolling interest																														0	0	0	0	0	1,357	1,357
Net income																														0	0	62,092	0	62,092	13,366	75,458
Foreign currency translation adjustments																														0	0	0	(2,030)	(2,030)	(1,206)	(3,236)
Change in respect of derivative instruments designated for cash flow hedge									$ 0	$ 0	$ 0	$ 2,379	$ 2,379	$ 0	$ 2,379
Change in unrealized gains or losses in respect of the Company's share in derivative instruments of unconsolidated investment																														0	0	0	3,892	3,892	0	3,892
Other																														0	0	0	228	228	0	228
Stock issuance costs reimbursement																														0	311	0	0	311	0	311
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax)																														$ 0	0	0	(40)	(40)	0	(40)
Balance (in shares) at Dec. 31, 2021																														56,056
Balance in Other comprehensive income (loss) end of period at Dec. 31, 2021																														$ 56	$ 1,271,925	$ 585,209	$ (2,191)	$ 1,854,999	$ 143,462	$ 1,998,461

[1] Resulted in an amount lower than $1 thousand.