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Income Taxes - Statutory rate (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Schedule of reconciliation between statutory tax rate and effective tax rate |  |  |
Statutory federal rate | 21.00% | 21.00% | 35.00%
State income taxes, net of federal benefits | 4.60% | (1.40%) | 4.20%
Adjustment to deferred tax assets as a result of the 2017 Act | 0.00% | 0.00% | 21.80%
Termination of deferred compensation arrangements | 9.20% | 0.00% | 0.00%
Transaction costs | 0.00% | (6.20%) | 5.20%
Adjustments to contingent consideration | 0.00% | 0.00% | (5.00%)
Excess tax benefit on share-based compensation | (2.60%) | 15.50% | 0.00%
Impairment of intangible assets | 0.00% | (15.30%) | 0.00%
Acceleration of deductions due to change in tax law | 0.00% | 6.40% | 0.00%
Other | 2.20% | (1.90%) | (0.40%)
Effective tax rate | 34.40% | 18.10% | 60.80%
Cash payments for income taxes | $ 48.8 | $ 13.4 | $ 26.2

X
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