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STOCK-BASED COMPENSATION - Narrative (Details) $ / shares in Units, $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Sep. 23, 2021 shares | Dec. 31, 2023 USD ($) day $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares | Jun. 01, 2023 shares
Share-based Compensation [Line Items] |  |  |  |  |
Options granted (in shares) |  | 0 | 0 | 0 |
Unrecognized stock-based compensation expense | $ |  | $ 66.2 |  |  |
Weighted-average period for recognition (years) |  | 1 year 10 months 24 days |  |  |
2017 Plan |  |  |  |  |
Share-based Compensation [Line Items] |  |  |  |  |
Shares available for grant (in shares) |  | 4,700,000 |  |  | 4,800,000
2012 Purchase Plan |  |  |  |  |
Share-based Compensation [Line Items] |  |  |  |  |
Shares available for grant (in shares) |  | 1,300,000 |  |  |
Number of additional shares authorized (in shares) | 4,000,000 |  |  |  |
Maximum number of shares per participant per offering period (in shares) | 5,000 |  |  |  |
Options and RSUs | Non-Employee Director |  |  |  |  |
Share-based Compensation [Line Items] |  |  |  |  |
Service period for award vesting (in years) |  | 1 year |  |  |
RSUs |  |  |  |  |
Share-based Compensation [Line Items] |  |  |  |  |
Vesting rights, average trading days | day |  | 20 |  |  |
Weighted average grant date fair value (in dollars per share) | $ / shares |  | $ 23.02 | $ 25.78 | $ 29.83 |
Fair value of restricted stock units that vested | $ |  | $ 30.5 | $ 31.0 | $ 22.6 |
RSUs | Maximum |  |  |  |  |
Share-based Compensation [Line Items] |  |  |  |  |
Service period for award vesting (in years) |  | 4 years |  |  |
RSUs | Minimum |  |  |  |  |
Share-based Compensation [Line Items] |  |  |  |  |
Service period for award vesting (in years) |  | 3 years |  |  |
RSUs | Achievement levels based on EPS Targets |  |  |  |  |
Share-based Compensation [Line Items] |  |  |  |  |
Vesting weight (in percent) |  | 34.00% |  |  |
RSUs | Relative Total Stockholders Return |  |  |  |  |
Share-based Compensation [Line Items] |  |  |  |  |
Vesting weight (in percent) |  | 33.00% |  |  |
RSUs | Performance based on Nasdaq Healthcare Provider Index |  |  |  |  |
Share-based Compensation [Line Items] |  |  |  |  |
Vesting weight (in percent) |  | 33.00% |  |  |

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