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FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Investments in securities: |  |  |
Investments in trading securities | $ 15,594 |  | $ 15,342
Total assets measured at fair value | 18,638 |  | 18,369
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Beginning balance | 2,792 | $ 4,369 |
Unrealized gains (losses) on private investments | 0 | (43) |
Ending balance | 2,792 | $ 4,326 |
Fair Value Inputs [Abstract] (Deprecated 2018-01-31) |  |  |
Long-term Investments | 4,455 |  | 4,455
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value | 11,841 |  | 12,901
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | $ (1,060) |  |
Unobservable input - revenue retention discount rate - maximum | true |  |
Unobservable input - revenue retention discount rate - weighted average | true |  |
Unobservable input - revenue retention discount rate - minimum | true |  |
Unobservable input - revenue retention volatility - weighted average | true |  |
Unobservable input - revenue retention volatility - maximum | true |  |
Unobservable input - revenue retention volatility - minimum | true |  |
Unobservable input - growth discount rate - weighted average | true |  |
Unobservable input - growth discount rate - maximum | true |  |
Unobservable input - growth discount rate - minimum | true |  |
Unobservable input - growth volatility - weighted average | true |  |
Unobservable input - growth volatility - maximum | true |  |
Unobservable input - growth volatility - minimum | true |  |
Level 1 |  |  |
Investments in securities: |  |  |
Investments in trading securities | $ 15,594 |  | 15,342
Total assets measured at fair value | 15,594 |  | 15,342
Level 2 |  |  |
Investments in securities: |  |  |
Investments in trading securities | 0 |  | 0
Total assets measured at fair value | 0 |  | 0
Level 3 |  |  |
Investments in securities: |  |  |
Investments in trading securities | 0 |  | 0
Total assets measured at fair value | $ 2,792 |  | $ 2,792
Asset Acquisition, Consideration Transferred, Contingent Consideration | Level 3 |  | Level 3
Other Liabilities, Fair Value Disclosure | $ 11,841 |  | $ 12,901
Investments Measured at NAV |  |  |
Investments in securities: |  |  |
Investments in trading securities | 0 |  | 0
Total assets measured at fair value | $ 252 |  | $ 235
Fair Value, Recurring |  |  |
Investments in securities: |  |  |
Asset Acquisition, Consideration Transferred, Contingent Consideration | Fair Value, Inputs, Level 1, 2 and 3 [Member] |  | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Private investment fund |  |  |
Investments in securities: |  |  |
Private | $ 252 |  | $ 235
Private investment fund | Level 1 |  |  |
Investments in securities: |  |  |
Private | 0 |  | 0
Private investment fund | Level 2 |  |  |
Investments in securities: |  |  |
Private | 0 |  | 0
Private investment fund | Level 3 |  |  |
Investments in securities: |  |  |
Private | 0 |  | 0
Private investment fund | Investments Measured at NAV |  |  |
Investments in securities: |  |  |
Private | 252 |  | 235
Private equity |  |  |
Investments in securities: |  |  |
Private | 2,792 |  | 2,792
Private equity | Level 1 |  |  |
Investments in securities: |  |  |
Private | 0 |  | 0
Private equity | Level 2 |  |  |
Investments in securities: |  |  |
Private | 0 |  | 0
Private equity | Level 3 |  |  |
Investments in securities: |  |  |
Private | 2,792 |  | 2,792
Private equity | Investments Measured at NAV |  |  |
Investments in securities: |  |  |
Private | $ 0 |  | $ 0

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