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INCOME TAXES (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Income Tax Disclosure [Abstract] |  |  |  |
Income taxes (Note 15) | $ 19,340 | $ 25,209 | $ 58,832 | $ 73,991
Pre-tax income | 91,797 | $ 95,744 | $ 288,199 | $ 274,205
Effective income tax rate (as a percent) |  |  | 20.40% | 27.00%
Unrecognized tax benefits | 22,083 |  | $ 22,083 |
Unrecognized tax benefits that, if recognized, would be reflected as a component of income tax expense | 18,590 |  | 18,590 |
Reasonably possible reduction in prior years' unrecognized tax benefits during the next twelve months | $ 1,470 |  | $ 1,470 |

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