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Equity-Based Compensation - Additional Information (Details) |  |  |  |  |  |  |  |  | 12 Months Ended |  |
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Mar. 01, 2028 | Mar. 01, 2027 | Feb. 24, 2026 tranche | Dec. 22, 2025 shares | Mar. 13, 2025 | Mar. 13, 2024 | Sep. 14, 2023 | Mar. 25, 2021 shares | Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2027 | Dec. 31, 2026
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate intrinsic value, options exercised |  |  |  |  |  |  |  |  | $ 3,616,000 | $ 39,000 | $ 0 |  |
Options granted, fair value |  |  |  |  |  |  |  |  | $ 0 | 0 | 0 |  |
Stock Options |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  |  |  |  |  |  | 4 years |  |  |  |
Award expiration period |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Stock Options | First Stock Price Hurdle |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  |  |  | 25.00% |  |  |  |
Stock Options | Second Stock Price Hurdle |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  |  |  | 25.00% |  |  |  |
Stock Options | Third Stock Price Hurdle |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  |  |  | 25.00% |  |  |  |
Stock Options | Share-Based Payment Arrangement, Tranche Four |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  |  |  | 25.00% |  |  |  |
Restricted Stock Awards |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  |  |  |  |  |  | 4 years |  |  |  |
Restricted Stock Awards | First Stock Price Hurdle |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  |  |  | 25.00% |  |  |  |
Restricted Stock Awards | Second Stock Price Hurdle |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  |  |  | 25.00% |  |  |  |
Restricted Stock Awards | Third Stock Price Hurdle |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  |  |  | 25.00% |  |  |  |
Restricted Stock Awards | Share-Based Payment Arrangement, Tranche Four |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  |  |  | 25.00% |  |  |  |
Pre-IPO Awards Converted RSAs | First Stock Price Hurdle |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  |  |  | 50.00% |  |  |  |
Pre-IPO Awards Converted RSAs | Second Stock Price Hurdle |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  |  |  | 50.00% |  |  |  |
RSUs |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  |  |  | 25.00% |  |  |  |
Award vesting period |  |  |  |  |  |  |  |  | 4 years |  |  |  |
RSUs | First Stock Price Hurdle |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  |  |  | 33.00% |  |  |  |
Award vesting period |  |  |  |  |  |  |  |  | 3 years |  |  |  |
Performance-based Restricted Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Health plan revenue growth percentage |  |  |  |  |  |  |  |  | 60.00% |  |  |  |
Performance target, returning member medical benefit ratio |  |  |  |  |  |  |  |  | 0.20 |  |  |  |
Performance target, adjusted earnings before interest, less capital expenditures |  |  |  |  |  |  |  |  | 20.00% |  |  |  |
Performance-based Restricted Stock Units | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of consecutive trading days |  |  | 30 days |  |  |  |  |  |  |  |  |  |
Number of tranches | tranche |  |  | 3 |  |  |  |  |  |  |  |  |  |
Performance-based Restricted Stock Units | Scenario Forecast |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) | 100.00% | 100.00% |  |  |  |  |  |  |  |  |  |  |
Health plan revenue growth percentage |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00%
Adjusted EBITDA weighting percent |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00%
Performance-based Restricted Stock Units | First Stock Price Hurdle |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Performance-based Restricted Stock Units | Second Stock Price Hurdle |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Non-vested awards RSAs, options and RSUs |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation expense, unrecognized |  |  |  |  |  |  |  |  | $ 46,535,000 | $ 61,809,000 | $ 98,004,000 |  |
Weighted average contractual term |  |  |  |  |  |  |  |  | 1 year 6 months 3 days | 1 year 6 months 18 days | 1 year 10 months 17 days |  |
2021 Equity Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares available for issuance, annual percentage increase |  |  |  |  |  |  |  | 4.00% |  |  |  |  |
Number of share available for grant, annual percentage increase, term |  |  |  |  |  |  |  | 10 years |  |  |  |  |
Additional shares of common stock (in shares) | shares |  |  |  | 27,915,561 |  |  |  |  |  |  |  |  |
Maximum | Performance-based Restricted Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  | 200.00% | 200.00% | 150.00% |  |  |  |  |  |
Maximum | 2021 Equity Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares available for issuance (in shares) | shares |  |  |  |  |  |  |  | 20,744,444 |  |  |  |  |
Minimum | Performance-based Restricted Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual award vesting rights (as a percent) |  |  |  |  | 0.00% | 0.00% | 0.00% |  |  |  |  |  |

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