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INCOME TAXES - Valuation Allowances (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Operating Loss Carryforwards [Line Items] |  |  |
Deferred tax assets, valuation allowance | $ 37,999 | $ 36,046 |
Capital loss carryforwards | 1,800 |  |
Interest expense limitation carryforwards | 30,500 |  |
Federal net operating loss carry forwards, have no expiration period | 8,000 |  |
Tax holiday, taxes decrease | $ 14,300 | $ 19,400 | $ 13,300
Income tax holiday, income tax benefits per share | $ 0.38 | $ 0.52 | $ 0.35
Decrease in valuation allowance | $ 1,900 |  |
Undistributed earnings of foreign subsidiaries | 34,900 |  |
Domestic Tax Authority |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Deferred tax assets, valuation allowance | 2,500 |  |
Operating loss carryforwards | 36,700 |  |
Tax credit carryforward amount | 100 |  |
Foreign Tax Authority |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Deferred tax assets, valuation allowance | 35,500 |  |
Operating loss carryforwards | 287,100 |  |
State Taxing Authority |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards | 103,900 |  |
Tax credit carryforward amount | 1,900 |  |
GERMANY |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Deferred tax assets, valuation allowance | $ 25,600 |  |

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