Income Taxes (Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current tax expense (benefit):
Federal	$ 10,041	$ 8,882	$ 19,351
State	1,873	1,308	1,135
Total current tax expense (benefit)	11,914	10,190	20,486
Deferred tax expense (benefit):
Federal	(3,306)	280	(10,303)
State	(1,217)	89	(177)
Total deferred tax expense (benefit)	(4,523)	369	(10,480)
Total income tax expense	$ 7,391	$ 10,559	$ 10,006