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INCOME TAXES (Additional Information) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Effective income tax rate |  | (71.60%) | 557.50% | 59.80%
Net benefit from enacted tax act | $ 93,000 |  |  |
Tax benefit due to reduction in net deferred tax liability | 100,500 |  |  |
One-time tax expense on deemed repatriation | 7,500 |  |  |
Tax effects |  | $ (269) | $ 16,918 | $ 7
Valuation allowance | 68,355 | 68,355 | 55,189 |
Valuation allowance, foreign tax credits | 17,500 | 17,500 | 25,000 |
Valuation allowance, federal net operating loss carryforwards | 3,900 | 3,900 | 1,500 |
Valuation allowance, state net operating loss carryforwards | 11,900 | 11,900 | 5,000 |
Valuation allowance, foreign net operating loss carryforwards | 22,600 | 22,600 | 18,000 |
Valuation allowance, deferred tax assets of Canadian subsidiary | 12,500 | 12,500 | 5,700 |
Unrecognized tax benefits that would impact effective tax rate | 5,100 | 5,100 | 1,700 | 2,100
Unrecognized tax benefits, income tax penalties and interest accrued | $ 900 | 900 | 300 | 400
Unrecognized tax benefits, penalties and interest |  | 500 | 100 | 100
Reduction in unrecognized tax benefit from the expiration of statue of limitations and the resolution of tax audits |  | 1,400 |  |
Foreign Currency Translation Adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Tax effects |  | $ 0 | $ 16,761 | $ 0

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