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INCOME TAXES - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Contingency [Line Items] |  |  |  |
Additional income tax expense |  | $ 14,200 |  |
Reduction of income tax provision due to tax holidays |  | 1,300 | $ 1,000 |
Unrecognized tax benefits | $ 18,157 | $ 19,150 | $ 22,671 | $ 23,972
Expected changes in unrecognized tax benefits in next 12 months that would reduce effective tax rate | 500 |  |  |
Change In Benefits Recorded Against Deferred Tax Items |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Unrecognized tax benefits that would decrease effective tax rate if recognized | 2,100 |  |  |
Federal |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax credits expected to expire unused | 100 |  |  |
State |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax credits expected to expire unused | 7,400 |  |  |
Foreign |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax credits expected to expire unused | $ 46,100 |  |  |

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- Definition The amount of income tax expense recognized in the three months ended December 31, 2017 to re-measure the Company's net deferred tax assets to the 21% enacted tax rate. + References No definition available. + Details
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- Definition The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330215-122817 + Details
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