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INCOME TAXES (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Income Taxes [Abstract] |  |  |  |  |  |
Provision for income taxes | $ 20,638 |  | $ 19,967 | $ 45,296 | $ 34,173 |
Effective tax rate | 28.80% |  | 32.20% | 34.40% | 33.00% |
Net deferred tax assets | $ 1,400 |  |  | $ 1,400 |  |
Net deferred tax liabilities |  |  |  |  |  | $ 2,900
Maximum [Member] |  |  |  |  |  |
Income Taxes [Abstract] |  |  |  |  |  |
Statute of limitations related to income tax examinations |  |  |  | 10 years |  |
Income Taxes [Abstract] |  |  |  |  |  |
Decrease in unrecognized tax benefits within the next 12 months that is reasonably possible | 2,000 |  |  | $ 2,000 |  |
Minimum [Member] |  |  |  |  |  |
Income Taxes [Abstract] |  |  |  |  |  |
Decrease in unrecognized tax benefits within the next 12 months that is reasonably possible | 1,000 |  |  | $ 1,000 |  |
Mainland China [Member] |  |  |  |  |  |
Income Taxes [Abstract] |  |  |  |  |  |
Tax assessment (benefit) | $ (60,000) |  |  |  |  |
Indonesia [Member] |  |  |  |  |  |
Income Taxes [Abstract] |  |  |  |  |  |
Tax assessment (benefit) |  | $ 5,800 |  |  |  |

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- Definition Statute of limitations period related to income tax examinations in certain countries, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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