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FINANCING ARRANGEMENTS - Convertible Senior Notes (Details) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May 31, 2021 USD ($) | Apr. 30, 2021 USD ($) $ / shares | May 31, 2016 $ / shares | Jun. 30, 2021 USD ($) $ / shares | Dec. 31, 2021 USD ($) $ / shares | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jan. 01, 2021 | Apr. 30, 2016 USD ($) | Apr. 04, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  | $ 5,090,000 | $ 0 | $ 0 |  |  |
Share price | $ / shares |  |  |  |  | $ 23,160,000 |  |  |  |  |
Strike price (in usd per share) | $ / shares |  |  | $ 108.00 |  |  |  |  |  |  |
Conversion price (in usd per share) | $ / shares |  |  | $ 170.00 |  |  |  |  |  |  |
Senior Notes | 3.25% Convertible Senior Notes due 2022 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt stated interest rate |  |  |  |  |  |  |  |  |  | 3.25%
Principal amount |  |  |  |  |  | 250,000,000 |  |  | $ 250,000,000 |
Aggregate purchase price |  |  |  | $ 255,000,000 |  |  |  |  |  |
Repurchased debt outstanding principal amount |  |  |  | 250,000,000 |  |  |  |  |  |
Debt repurchase accrued interest amount | $ 1,000,000 |  |  |  |  |  |  |  |  |
Debt repurchase prepayment penalty | $ 4,000,000 |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  | $ 5,100,000 |  |  |  |  |  |
Debt related commitment fees and issuance costs |  |  |  |  |  | 6,800,000 |  |  |  |
Transaction costs attributable to the liability component |  |  |  |  |  | $ 4,800,000 |  |  |  |
Debt effective interest rate |  |  |  |  | 3.76% | 9.75% |  | 3.76% |  |
Equity component of convertible debt |  |  |  |  |  | $ 2,000,000 |  |  |  |
Estimated fair value of convertible notes |  |  |  |  |  | $ 263,300,000 |  |  |  |
Senior Notes | 1.125% Convertible Senior Notes Due 2026 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt stated interest rate |  | 1.125% |  |  |  |  |  |  |  |
Principal amount |  | $ 230,000,000 |  |  | $ 230,000,000 |  |  |  |  |
Debt effective interest rate |  |  |  |  | 1.83% |  |  |  |  |
Estimated fair value of convertible notes |  |  |  |  | $ 183,300,000 |  |  |  |  |
Conversion price (in usd per share) | $ / shares |  | $ 68,120,000 |  | $ 68.12 |  |  |  |  |  |
Debt issuance costs |  |  |  |  | $ 7,800,000 |  |  |  |  |
Net proceeds |  | $ 222,100,000 |  |  |  |  |  |  |  |
Proceeds from debt used for capped call transactions payment |  | $ 27,400,000 |  |  |  |  |  |  |  |
Debt convertible, conversion ratio |  | 0.0146800 |  |  |  |  |  |  |  |
Debt conversion price, premium on stock price |  | 100.00% |  |  |  |  |  |  |  |
Senior Notes | 1.125% Convertible Senior Notes Due 2026 | Maximum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Conversion price (in usd per share) | $ / shares |  | $ 104.80 |  |  |  |  |  |  |  |

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