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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2017 | Jun. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Effective income tax rate on continuing operations (as a percent) |  | 32.30% | 32.60%
Anticipated effective tax rate for beginning of year to date (as a percent) |  | 34.40% |
Discrete tax expense (benefit) related to state valuation allowance release |  | $ 5.1 | $ 1.1
Accounting Standards Update 2016-09 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Discrete income tax benefit | $ 0.9 | $ 3.5 |

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- Definition A ratio calculated by dividing the reported amount of expected income tax expense attributable to continuing operations for the period by GAAP-basis expected pretax income from continuing operations. + References No definition available. + Details
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