INVESTMENT SECURITIES - Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt and Equity Securities, FV-NI [Line Items]
Debt securities available for sale	$ 102,849	$ 73,225
Long-term investment securities at fair value	29,435	29,402
Total equity securities at fair value	67,569	67,112
Total investment securities at fair value	170,418	140,337
Current investment securities at fair value	140,983	110,935
Equity-method investments	17,354	17,358
Total long-term investments	46,789	46,760
Equity securities and other long-term investments at cost	7,555	7,555
Marketable equity securities
Debt and Equity Securities, FV-NI [Line Items]
Equity securities at fair value:	14,103	14,286
Mutual funds invested in debt securities
Debt and Equity Securities, FV-NI [Line Items]
Equity securities at fair value:	$ 24,031	$ 23,424

Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.

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