Income Taxes (Reconciliation Of The Significant Differences Between The Federal Statutory Income Tax Rate And Effective Income Tax Rate) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Computed federal taxes at statutory rate									$ 26,740	$ 23,351	$ 23,376
State income taxes, net of federal tax benefit									2,871	3,124	2,070
Tax effects of:
Tax-exempt interest income									(1,142)	(1,177)	(944)
Bank-owned life insurance									(1,167)	(818)	(929)
Income tax credits									(1,904)	(1,449)	(1,113)
Other items, net									(135)	83	(743)
Income tax expense	$ 6,824	$ 7,421	$ 5,767	$ 5,251	$ 6,237	$ 6,250	$ 5,640	$ 4,987	$ 25,263	$ 23,114	$ 21,717
Effective Income Tax Rate Reconciliation, Percent									19.80%	20.80%	19.50%