Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Current tax expense (benefit):
Income tax provision	$ 12,005	$ 11,390	$ 25,014	$ 26,810
Effective tax rate	20.70%	13.70%	18.80%	19.50%
Current income tax expense (benefit)			$ 5,200
Deferred tax expense (benefit):
Deferred Income Tax Expense (Benefit), Excluding Discontinued Operations			$ 21,100