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LONG-TERM INVESTMENTS (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]    
Severance-pay funds $ 11,942 $ 10,472
Long-term bank deposits 12,500 12,500
Investments in privately held companies 15,155 17,727
Long-term investments, total $ 39,597 $ 40,699