Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current income tax expense (benefit):
Federal	$ 15,980	$ (569)	$ 999
State	2,810	2,993	1,733
Total current income tax expense	18,790	2,424	2,732
Deferred income tax expense (benefit):
Federal	774	15,023	36,569
State	463	(311)	(270)
Total deferred income tax expense	1,237	14,712	36,299
Total income tax expense	$ 20,027	$ 17,136	$ 39,031