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INCOME TAXES (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |  |  |  |
Effective income tax rate | 30.70% | 30.80% | 37.20% | 48.00% |
Unrecognized tax benefits | $ 4.8 |  | $ 4.8 |  | $ 3.2
Interest on unrecognized tax benefits | $ 1.2 |  | 1.2 |  | $ 0.8
Reduction in unrecognized tax benefits from expiring statue of limitations |  |  | $ 0.6 |  |

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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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