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EMPLOYEE BENEFIT PLANS - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Shares reserved for issuance | 46,439,269 | 49,746,246 |
Modification charge | $ 3,119 | $ 9,047 |
Aggregate intrinsic value of employee options exercised | 72,649 | 57,311 | $ 296,635
Compensation cost related to the nonvested awards not yet recognized | $ 14,626 |  |
Weighted average period for recognition of compensation cost | 1 year 10 months 24 days |  |
Income tax benefits recognized | $ 753 | 835 | 821
Tax benefits realized on awards vested and exercised | $ 1,326 | 387 | 968
Employees percentage of eligible compensation may elect to contribute | 100.00% |  |
Employer discretionary contribution amount | $ 1,710 | 1,791 | 0
Internal-use software and website development |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
cumulative stock-based compensation expense | $ 7,055 | $ 5,407 | $ 4,890
Stock Options |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Share based compensation, expiration period | 10 years |  |
Vesting period | 4 years |  |
Weighted average grant-date fair value of stock options granted (in dollars per share) | $ 8.41 | $ 7.26 | $ 16.23
Restricted Stock Units |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Vesting period | 4 years |  |
Aggregate fair value of RSUs vested | $ 130,891 | $ 29,966 | $ 18,767
Compensation cost related to the nonvested awards not yet recognized | $ 230,963 |  |
Weighted average period for recognition of compensation cost | 2 years 6 months |  |
Restricted Stock Units | Share-Based Payment Arrangement, Tranche One |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Share-based compensation arrangement by share-based payment award, award Vesting rights, percentage | 25.00% |  |
Cliff vesting period | 1 year |  |
Restricted Stock Units | Share-Based Payment Arrangement, Tranche Two |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Share-based compensation arrangement by share-based payment award, award Vesting rights, percentage | 6.25% |  |
Restricted Stock Units | Share-Based Payment Arrangement, Tranche Three |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Share-based compensation arrangement by share-based payment award, award Vesting rights, percentage | 6.25% |  |
Employee Stock Purchase Plan |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Percent of the lower of the market price for Purchase shares of common stock | 85.00% |  |
Employee stock incentive plan, purchase period | 6 months |  |
Shares reserved for issuance | 4,307,884 |  |
Compensation cost related to the nonvested awards not yet recognized | $ 7,330 |  |
Weighted average period for recognition of compensation cost | 1 year |  |
2021 Employee Stock Purchase Plan |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Shares reserved for issuance | 12,605,201 |  |

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