Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current income tax expense (benefit):
Federal	$ 20,968	$ 15,980	$ (569)
State	4,162	2,810	2,993
Total current income tax expense	25,130	18,790	2,424
Deferred income tax expense (benefit):
Federal	(354)	774	15,023
State	240	463	(311)
Total deferred income tax expense	(114)	1,237	14,712
Total income tax expense	$ 25,016	$ 20,027	$ 17,136