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INCOME TAXES - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Tax Credit Carryforward [Line Items] |  |  |
Undistributed earnings of foreign subsidiaries indefinitely invested | $ 85,700,000 |  |
Deferred tax liability not recognized, amount of unrecognized deferred tax liability, undistributed earnings of foreign subsidiaries | 6,400,000 |  |
Tax Cuts and Jobs Act of 2017, transition tax for accumulated foreign earnings | 0 |  |
Research and development costs | 30,300,000 | $ 26,700,000 |
Deferred tax asset related to net operating loss and capital loss and foreign tax credit carryforwards and research and development credit | 373,900,000 |  |
Deferred tax asset valuation allowance | 431,900,000 | 401,800,000 |
Cash paid for income taxes, net of amounts refunded | 59,600,000 | 215,700,000 | $ 173,400,000
Unrecognized tax benefits | 24,900,000 | 38,000,000 |
Unrecognized tax benefits, interest and penalties | 2,600,000 | 3,000,000 |
Unrecognized tax benefits that would have affected the effective tax rate | 23,800,000 | 35,700,000 |
Unrecognized tax benefits that would impact effective tax rate, income tax penalties and interest accrued | 2,300,000 | 2,600,000 |
Income tax, penalties and interest accrued | 900,000 | 1,400,000 |
Tax Cuts and Jobs Act of 2017, reduction in net deferred tax liability |  | $ 85,100,000 |
Minimum |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Decrease unrecognized tax benefits is reasonably possible | 0 |  |
Increase in unrecognized tax benefits is reasonably possible | 0 |  |
Maximum |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Decrease unrecognized tax benefits is reasonably possible | 4,100,000 |  |
Increase in unrecognized tax benefits is reasonably possible | 4,100,000 |  |
Operating Loss and Capital Loss and Foreign Tax Credit Carryforwards and Research and Development Credit |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Deferred tax asset valuation allowance | 310,200,000 |  |
Foreign Country |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Operating loss carryforwards | 1,114,900,000 |  |
Expire At Various Times Between 2021 and 2038 | United States Federal |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Operating loss carryforwards | 134,500,000 |  |
Expire At Various Times Between 2019 and 2038 | Foreign Country |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Operating loss carryforwards | 399,100,000 |  |
Net Operating Loss Indefinite Life | Foreign Country |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Operating loss carryforwards | 715,800,000 |  |
Net Operating Loss Indefinite Life | State |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Operating loss carryforwards | 1,800,000 |  |
Capital Loss Indefinite Life | Foreign Country |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Operating loss carryforwards | 15,700,000 |  |
Expire in 2018 | State |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Capital loss carryforwards | 2,500,000 |  |
Expire in Years 2025 through 2026 | Foreign Country |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Tax credit carryforward | $ 16,800,000 |  |

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