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DEBT - Narrative (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |  |
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Mar. 31, 2025 USD ($) | Jun. 30, 2023 USD ($) $ / shares | Mar. 31, 2023 USD ($) | Apr. 01, 2022 USD ($) shares | Mar. 13, 2017 USD ($) | Jul. 31, 2023 USD ($) | Jan. 06, 2022 | Dec. 31, 2021 USD ($) | Jul. 31, 2020 USD ($) $ / shares | Jun. 30, 2023 USD ($) trading_day $ / shares | Jun. 30, 2022 USD ($) shares | Dec. 31, 2023 USD ($) | Jun. 30, 2023 USD ($) trading_day $ / shares | Jun. 30, 2022 USD ($) shares | Mar. 31, 2028 USD ($) | Dec. 31, 2022 USD ($) | Jan. 07, 2022 USD ($) | May 02, 2017 USD ($)
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Term loan A facility |  |  |  |  |  |  |  |  |  |  |  |  | $ 149,550 | $ 0 |  |  |  |
Loss on early extinguishment of debt |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 |  | $ (16,926) | 0 |  |  |  |
Settlement period - convertible debt conversion request |  |  |  |  |  |  |  |  |  |  |  |  | 40 days |  |  |  |  |
Closing sale price (in dollars per share) | $ / shares |  | $ 40.07 |  |  |  |  |  |  |  | $ 40.07 |  |  | $ 40.07 |  |  |  |  |
Amortization of debt discount |  |  |  |  |  |  |  |  |  | $ 28 | $ 706 |  | $ 703 | $ 1,412 |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments to additional paid in capital, other |  |  |  | $ 3,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock upon conversion of 2022 convertible senior notes (in shares) | shares |  |  |  | 101,521 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term Loan A Facility Due March 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Leverage ratio, maximum |  | 3.00 |  |  |  |  |  |  |  | 3.00 |  |  | 3.00 |  |  |  |  |
Leverage ratio, minimum |  | 1.50 |  |  |  |  |  |  |  | 1.50 |  |  | 1.50 |  |  |  |  |
Weighted average interest rate, at point in time |  | 8.01% |  |  |  |  |  |  |  | 8.01% |  |  | 8.01% |  |  |  |  |
Term Loan A Facility Due March 2028 | Minimum | Base Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net leverage ratio |  | 2.00% |  |  |  |  |  |  |  | 2.00% |  |  | 2.00% |  |  |  |  |
Term Loan A Facility Due March 2028 | Minimum | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net leverage ratio |  | 3.00% |  |  |  |  |  |  |  | 3.00% |  |  | 3.00% |  |  |  |  |
Term Loan A Facility Due March 2028 | Maximum | Base Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net leverage ratio |  | 2.75% |  |  |  |  |  |  |  | 2.75% |  |  | 2.75% |  |  |  |  |
Term Loan A Facility Due March 2028 | Maximum | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net leverage ratio |  | 3.75% |  |  |  |  |  |  |  | 3.75% |  |  | 3.75% |  |  |  |  |
Convertible Senior Notes Due 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  | 0.75% |  |  |  |  |  |  |  | 0.75% |  |  | 0.75% |  |  |  |  |
Initial conversion rate of common stock per $1,000 of principal amount of Notes |  |  |  |  |  |  |  |  |  |  |  |  | 0.0139324 |  |  |  |  |
Initial conversion price of notes into common stock (in dollars per share) | $ / shares |  | $ 71.78 |  |  |  |  |  |  | $ 71.78 | $ 71.78 |  |  | $ 71.78 |  |  |  |  |
Convertible debt, premium on common stock |  |  |  |  |  |  |  |  | 32.50% |  |  |  |  |  |  |  |  |
Closing sale price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 54.17 |  |  |  |  |  |  |  |  |
Market price of principal amount of notes |  | 0.926 |  |  |  |  |  |  |  | 0.926 |  |  | 0.926 |  |  |  |  |
Convertible Senior Notes Due 2025 | Debt Redemption Terms Prior to February 3, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold percentage stock price trigger |  |  |  |  |  |  |  |  |  | 130.00% |  |  |  |  |  |  |  |
Threshold trading days | trading_day |  |  |  |  |  |  |  |  |  | 20 |  |  |  |  |  |  |  |
Threshold consecutive trading days | trading_day |  |  |  |  |  |  |  |  |  | 30 |  |  |  |  |  |  |  |
Convertible Senior Notes Due 2025 | Debt Redemption Terms on or After August 1, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold percentage stock price trigger |  |  |  |  |  |  |  |  |  |  |  |  | 130.00% |  |  |  |  |
Threshold trading days | trading_day |  |  |  |  |  |  |  |  |  |  |  |  | 20 |  |  |  |  |
Threshold consecutive trading days | trading_day |  |  |  |  |  |  |  |  |  |  |  |  | 30 |  |  |  |  |
Debt instrument, percentage of principal amount for computation of redemption price |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
Convertible Senior Notes Due 2022 | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock upon conversion of 2022 convertible senior notes (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 102,000 |  |  | 102,000 |  |  |  |
Convertible Senior Notes Due 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, percentage of principal amount for computation of redemption price |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |
Convertible Senior Notes Due May 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  | 3.375% |  |  |  |  |  |  |  | 3.375% |  |  | 3.375% |  |  |  |  |
Term Loan | Term Loan A Facility Due March 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  | 0.30% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 150,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Term loan A facility |  |  | 149,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, unamortized discount |  | $ 423 | 400 |  |  |  |  |  |  | $ 423 |  |  | $ 423 |  |  |  |  |
Periodic payment, principal |  | 2,800 |  |  |  |  |  |  |  |  |  |  | 2,800 |  |  |  |  |
Long-term debt |  | 145,686 |  |  |  |  |  |  |  | 145,686 |  |  | 145,686 |  |  | $ 0 |  |
Term Loan | Term Loan A Facility Due March 2028 | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Periodic payment, principal |  |  |  |  |  | $ 25,000 |  |  |  |  |  |  |  |  |  |  |  |
Term Loan | Term Loan A Facility Due March 2028 | Scenario, Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Periodic payment, principal | $ 3,800 |  |  |  |  |  |  |  |  |  |  | $ 5,600 |  |  |  |  |  |
Balloon payment to be paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 85,300 |  |  |
Term Loan | Term Loan B Facility Due 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 375,000 |  |  |  |  |  |  |  |  |  |
Proceeds from Term loan A facility |  |  |  |  |  |  |  | 363,800 |  |  |  |  |  |  |  |  |  |
Debt instrument, unamortized discount |  | 0 |  |  |  |  |  | $ 11,200 |  | 0 |  |  | 0 |  |  | 8,252 |  |
Periodic payment, principal |  |  |  |  |  |  |  |  |  |  |  |  | 9,400 |  |  |  |  |
Repayments of debt |  |  | $ 149,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment fee percentage |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of debt principal |  |  |  |  |  |  |  |  |  |  |  |  | 287,500 |  |  |  |  |
Loss on early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  | (16,900) |  |  |  |  |
Long-term debt |  | $ 0 |  |  |  |  |  |  |  | $ 0 |  |  | $ 0 |  |  | 284,704 |  |
Unsecured Debt | Convertible Senior Notes Due 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  | $ 402,500 |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  | 0.75% |  |  |  |  |  |  | 0.75% | 0.75% |  |  | 0.75% |  |  |  |  |
Debt issued in private placement |  |  |  |  |  |  |  |  | $ 390,000 |  |  |  | $ 402,500 |  |  |  |  |
Long-term debt |  | $ 397,360 |  |  |  |  |  |  |  | $ 397,360 |  |  | $ 397,360 |  |  | 396,126 |  |
Unsecured Debt | Convertible Senior Notes Due 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | $ 156,900 |  |  |  |  | $ 211,100 |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 2.375% |  |  |  | 2.375% |  |  |  |  |  |  |  |  |
Debt issued in private placement |  |  |  |  | $ 345,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, repurchased face amount |  |  |  |  |  |  |  |  | $ 185,000 |  |  |  |  |  |  |  |  |
Extinguishment of debt, amount |  |  |  | 160,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of debt discount |  |  |  | $ (4,800) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured Debt | Convertible Senior Notes Due 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  | 3.375% |  |  |  |  |  |  |  | 3.375% |  |  | 3.375% |  |  |  |  |
Repurchase amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 192,600 |
Unsecured Debt | Convertible Senior Notes Due 2024 | Flexion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 201,300
Stated interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.375%
Unsecured Debt | Convertible Senior Notes Due May 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT AND FINANCING OBLIGATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  | $ 8,641 |  |  |  |  |  |  |  | $ 8,641 |  |  | $ 8,641 |  |  | $ 8,641 |  |

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