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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency
Income tax expense	$ 3.9	$ 4.9	$ 5.6	$ 2.9
Effective income tax rate (percent)	15.70%	25.10%	16.00%	15.70%
Liability for gross unrecognized tax benefits	$ 2.6		$ 2.6			$ 2.4
Unrecognized tax benefit that would impact effective tax rate	$ 1.8		$ 1.8			$ 1.8
Forecast
Income Tax Contingency
Effective income tax rate (percent)					19.00%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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