Income Taxes (Summary Of Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal									$ 17,248	$ 16,599	$ 16,636
State									3,681	2,478	2,560
Total current tax expense									20,929	19,077	19,196
Total deferred tax expense									2,185	2,640	4,939
Income tax expense	$ 6,237	$ 6,250	$ 5,640	$ 4,987	$ 4,565	$ 5,098	$ 4,732	$ 7,322	$ 23,114	$ 21,717	$ 24,135