MARKETABLE SECURITIES (Continuous Unrealized Loss Position) (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Estimated Fair Market Value, Total marketable securities	$ 45,047,000	$ 274,380,000
Less Than 12 Months Gross Unrealized Losses, Total marketable securities	(662,000)	(1,186,000)
12 Months or Longer Estimated Fair Market Value, Total marketable securities	191,443,000	0
12 Months or Longer Gross Unrealized Losses, Total marketable securities	(4,732,000)	0
Total Estimated Fair Market Value, Total marketable securities	236,490,000	274,380,000
Total Gross Unrealized Losses, Total marketable securities	(5,394,000)	(1,186,000)
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Corporate securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Estimated Fair Market Value, Total marketable securities	45,047,000	274,380,000
Less Than 12 Months Gross Unrealized Losses, Total marketable securities	(662,000)	(1,186,000)
12 Months or Longer Estimated Fair Market Value, Total marketable securities	191,443,000	0
12 Months or Longer Gross Unrealized Losses, Total marketable securities	(4,732,000)	0
Total Estimated Fair Market Value, Total marketable securities	236,490,000	274,380,000
Total Gross Unrealized Losses, Total marketable securities	$ (5,394,000)	$ (1,186,000)