INVESTMENTS - Cash and Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Cash And Cash Equivalents And Marketable securities [Line Items]
Cost, Cash and cash equivalents, excluding money market accounts	$ 92,291	$ 88,778
Estimated Fair Value, Cash and cash equivalents	92,291	88,778
Unrealized Gains, Investment securities	2,755	569
Accrued Interest, Investment securities	336	310
Cost	153,337	149,162
Estimated Fair Value	156,428	150,041
Cash & Cash Equivalents
Cash And Cash Equivalents And Marketable securities [Line Items]
Estimated Fair Value, Cash and cash equivalents	92,291	88,778
Estimated Fair Value	97,471	94,440
Investment Securities
Cash And Cash Equivalents And Marketable securities [Line Items]
Estimated Fair Value	58,957	55,601
Level 1
Cash And Cash Equivalents And Marketable securities [Line Items]
Cost, Equity securities	10,000	10,000
Unrealized Gains, Equity securities	2,587	150
Accrued Interest, Equity securities	0	0
Estimated Fair Value, Equity securities	12,587	10,150
Cost, Investment securities	30,634	30,944
Unrealized Gains, Investment securities	2,573	276
Accrued Interest, Investment securities	64	40
Estimated Fair Value, Investment securities	33,271	31,260
Level 1 | Cash & Cash Equivalents
Cash And Cash Equivalents And Marketable securities [Line Items]
Estimated Fair Value, Equity securities	0	0
Estimated Fair Value, Investment securities	5,180	5,662
Level 1 | Investment Securities
Cash And Cash Equivalents And Marketable securities [Line Items]
Estimated Fair Value, Equity securities	12,587	10,150
Estimated Fair Value, Investment securities	28,091	25,598
Level 1 | Money market accounts
Cash And Cash Equivalents And Marketable securities [Line Items]
Cost, Debt Securities	5,180	5,662
Debt Securities, Available-for-Sale, Current	5,180	5,662
Level 1 | Money market accounts | Cash & Cash Equivalents
Cash And Cash Equivalents And Marketable securities [Line Items]
Debt Securities, Available-for-Sale, Current	5,180	5,662
Level 1 | Money market accounts | Investment Securities
Cash And Cash Equivalents And Marketable securities [Line Items]
Debt Securities, Available-for-Sale, Current	0	0
Level 1 | Government & agency securities
Cash And Cash Equivalents And Marketable securities [Line Items]
Cost, Debt Securities	15,454	15,282
Debt Securities, Available-for-Sale, Current	15,504	15,448
Level 1 | Government & agency securities | Unrealized Gains (Losses)
Cash And Cash Equivalents And Marketable securities [Line Items]
Unrealized Gains		126
Unrealized Loss	(14)
Level 1 | Government & agency securities | Accrued Interest
Cash And Cash Equivalents And Marketable securities [Line Items]
Unrealized Gains	64	40
Level 1 | Government & agency securities | Cash & Cash Equivalents
Cash And Cash Equivalents And Marketable securities [Line Items]
Debt Securities, Available-for-Sale, Current	0	0
Level 1 | Government & agency securities | Investment Securities
Cash And Cash Equivalents And Marketable securities [Line Items]
Debt Securities, Available-for-Sale, Current	15,504	15,448
Level 2 | Corporate bonds
Cash And Cash Equivalents And Marketable securities [Line Items]
Cost, Debt Securities	30,412	29,440
Debt Securities, Available-for-Sale, Current	30,866	30,003
Level 2 | Corporate bonds | Unrealized Gains (Losses)
Cash And Cash Equivalents And Marketable securities [Line Items]
Unrealized Gains	182	293
Level 2 | Corporate bonds | Accrued Interest
Cash And Cash Equivalents And Marketable securities [Line Items]
Unrealized Gains	272	270
Level 2 | Corporate bonds | Cash & Cash Equivalents
Cash And Cash Equivalents And Marketable securities [Line Items]
Debt Securities, Available-for-Sale, Current	0	0
Level 2 | Corporate bonds | Investment Securities
Cash And Cash Equivalents And Marketable securities [Line Items]
Debt Securities, Available-for-Sale, Current	$ 30,866	$ 30,003