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INCOME TAXES (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2014
Income tax carryforwards |  |  |  |  |  |  |
Effective tax rate (as a percent) | 35.70% |  | 29.60% | 28.00% | 30.00% |  |
Statutory federal income tax rate |  |  |  |  |  |  | 35.00%
Discrete tax benefit adjustment | $ 1.6 |  |  | $ 35.8 |  | $ 2.1 |
At tax rate of 21% |  |  |  |  |  |  |
Income tax carryforwards |  |  |  |  |  |  |
Discrete tax benefit adjustment |  | $ 13.1 |  |  |  |  |

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