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Fair Value of Financial Instruments (Levels) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Investments in securities: |  |  |
Investments in trading securities | $ 32,674 | $ 15,342 |
Total assets measured at fair value | 32,915 | 18,369 |
Asset Acquisition, Consideration Transferred, Contingent Consideration | $ 10,100 | 12,900 |
Unobservable input - revenue retention discount rate - minimum | 11.50% |  |
Unobservable input - revenue retention discount rate - maximum | 12.00% |  |
Unobservable input - revenue retention volatility - maximum | 16.30% |  |
Unobservable input - revenue retention volatility - minimum | 8.30% |  |
Unobservable input - revenue retention discount rate - weighted average | 11.75% |  |
Unobservable input - revenue retention volatility - weighted average | 11.30% |  |
Unobservable input - growth discount rate - weighted average | 13.00% |  |
Unobservable input - growth discount rate - maximum | 13.30% |  |
Unobservable input - growth discount rate - minimum | 12.80% |  |
Unobservable input - growth volatility - weighted average | 19.90% |  |
Unobservable input - growth volatility - maximum | 24.90% |  |
Unobservable input - growth volatility - minimum | 14.90% |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value | $ 10,133 | 12,901 | $ 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases | 0 | 12,901 |
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings | (2,768) | 0 |
Asset Acquisition, Contingent Consideration, Liability | 10,133 | 12,901 |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | (2,792) | 0 |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) | 0 | (1,577) |
Private Equity Investments [Member] |  |  |
Investments in securities: |  |  |
Equity Securities, FV-NI |  | 2,792 |
Private equity |  |  |
Investments in securities: |  |  |
Equity Securities, FV-NI | 241 | 235 |
Contingent Consideration Type [Domain] |  |  |
Investments in securities: |  |  |
Asset Acquisition, Consideration Transferred, Contingent Consideration | 10,133 | 12,901 |
Other Liabilities, Fair Value Disclosure | 10,133 | 12,901 |
Level 1 |  |  |
Investments in securities: |  |  |
Investments in trading securities | 32,674 | 15,342 |
Total assets measured at fair value | 32,674 | 15,342 |
Level 1 | Private Equity Investments [Member] |  |  |
Investments in securities: |  |  |
Equity Securities, FV-NI |  | 0 |
Level 1 | Private equity |  |  |
Investments in securities: |  |  |
Equity Securities, FV-NI | 0 | 0 |
Level 2 |  |  |
Investments in securities: |  |  |
Investments in trading securities | 0 | 0 |
Total assets measured at fair value | 0 | 0 |
Level 2 | Private Equity Investments [Member] |  |  |
Investments in securities: |  |  |
Equity Securities, FV-NI |  | 0 |
Level 2 | Private equity |  |  |
Investments in securities: |  |  |
Equity Securities, FV-NI | 0 | 0 |
Level 3 |  |  |
Investments in securities: |  |  |
Investments in trading securities | 0 | 0 |
Total assets measured at fair value | 0 | 2,792 |
Level 3 | Private Equity Investments [Member] |  |  |
Investments in securities: |  |  |
Equity Securities, FV-NI |  | 2,792 |
Level 3 | Private equity |  |  |
Investments in securities: |  |  |
Equity Securities, FV-NI | 0 | 0 |
Level 3 | Contingent Consideration Type [Domain] |  |  |
Investments in securities: |  |  |
Asset Acquisition, Consideration Transferred, Contingent Consideration | 10,133 | 12,901 |
Other Liabilities, Fair Value Disclosure | 10,133 |  |
Fair Value Measured at Net Asset Value Per Share | Private Equity Investments [Member] |  |  |
Investments in securities: |  |  |
Equity Securities, FV-NI |  | 0 |
Fair Value Measured at Net Asset Value Per Share | Private equity |  |  |
Investments in securities: |  |  |
Equity Securities, FV-NI | 241 | 235 |
Inputs, Net Asset Value [Member] |  |  |
Investments in securities: |  |  |
Investments in trading securities | 0 | 0 |
Total assets measured at fair value | $ 241 | $ 235 |

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