INVESTMENTS AND FAIR VALUE MEASUREMENTS - AMORTIZED COST (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	$ 93,713	$ 95,096
Unrealized Gains	3,568	290
Unrealized Losses	(2,568)	(1,669)
Fair Value	94,713	93,717
Mutual Fund
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	40,023	50,000
Unrealized Gains	0	0
Unrealized Losses	(1,601)	(338)
Fair Value	38,422	49,662
Equity Securities
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	43,039	38,100
Unrealized Gains	3,038	0
Unrealized Losses	(967)	(1,331)
Fair Value	45,110	36,769
Corporate Bond Securities
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	10,651	6,996
Unrealized Gains	530	290
Unrealized Losses	0	0
Fair Value	$ 11,181	$ 7,286