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Fair Value of Financial Instruments - Narrative (Details) $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2019 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Long-term investments | $ 64,319 | $ 75,414 |
Shorelight Holdings LLC |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Maturity date | Jan. 17, 2027 | Jan. 17, 2027 |
Contingent consideration for business acquisitions |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input | 0.059 | 0.063 |
Convertible debt investment | Shorelight Holdings LLC |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Long-term investments | $ 40,900 |  |
Interest rate (as a percent) | 1.69% |  |
Preferred Stock | Medically Home Group Inc. |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Long-term investments |  |  | $ 5,000
Cumulative unrealized gains | $ 28,600 |  |
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount | 26,300 |  |
Equity securities without readily determinable fair value | $ 7,400 | $ 7,400 |
Discount rate | Convertible debt investment | Shorelight Holdings LLC |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input | 0.230 | 0.245 |
Price volatility | Convertible debt investment | Shorelight Holdings LLC |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input | 0.400 | 0.350 |

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