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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Income tax provision	$ 33,156	$ 26,529	$ 60,639	$ 47,162
Effective income tax rates	28.40%	27.80%	28.20%	27.70%
Actual income tax rates	28.30%	27.20%	27.90%	27.10%
Unrecognized income tax benefits	$ 0		$ 0		$ 0

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Effective income tax rate before discrete items.

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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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Amount of unrecognized tax benefits.

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