INVESTMENTS AND FAIR VALUE MEASUREMENTS - AMORTIZED COST (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	$ 142,923	$ 132,312
Unrealized Gains	7,492	9,675
Unrealized Losses	(7,638)	(4,346)
Fair Value	142,777	137,641
Marketable Equity Securities | Equity securities
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	58,530	59,228
Unrealized Gains	5,868	7,896
Unrealized Losses	(7,227)	(4,146)
Fair Value	57,171	62,978
Marketable Debt Securities
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	84,393	73,084
Unrealized Gains	1,624	1,779
Unrealized Losses	(411)	(200)
Fair Value	85,606	74,663
Marketable Debt Securities | U.S. treasury securities
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	64,816	53,662
Unrealized Gains	976	1,307
Unrealized Losses	(16)	(3)
Fair Value	65,776	54,966
Marketable Debt Securities | Corporate bonds
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	19,577	19,422
Unrealized Gains	648	472
Unrealized Losses	(395)	(197)
Fair Value	$ 19,830	$ 19,697