Securities (Summary Of Securities Available For Sale In Unrealized Loss Position) (Details) $ in Thousands	Mar. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	233	157
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 232,195	$ 169,460
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	19,676	2,926
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	43,109	39,837
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,692)	(837)
Debt Securities, Available-for-sale, Unrealized Loss Position	275,304	209,297
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 21,368	$ 3,763
US Government Corporations and Agencies Securities [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	43	41
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 6,306	$ 6,630
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	63	23
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	21,545	21,061
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(362)	(337)
Debt Securities, Available-for-sale, Unrealized Loss Position	27,851	27,691
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 425	$ 360
Government Sponsored Agencies [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	34	19
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 30,776	$ 19,828
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,505	376
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	7,310	6,886
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(233)	(212)
Debt Securities, Available-for-sale, Unrealized Loss Position	38,086	26,714
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 1,738	$ 588
Nongovernment Sponsored Agencies [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	10	6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 13,596	$ 4,345
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	388	61
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	4,708	7,591
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(209)	(218)
Debt Securities, Available-for-sale, Unrealized Loss Position	18,304	11,936
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 597	$ 279
State and Political Subdivisions General Obligations [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	53	41
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 64,626	$ 62,543
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	8,640	1,286
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,539	1,055
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(236)	(37)
Debt Securities, Available-for-sale, Unrealized Loss Position	66,165	63,598
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 8,876	$ 1,323
State and Political Subdivisions Lease Revenues [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security		2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 1,564
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		14
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		494
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(12)
Debt Securities, Available-for-sale, Unrealized Loss Position		2,058
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		$ 26
State and Political Subdivisions Income Tax Revenues [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security		1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 721
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		0
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Debt Securities, Available-for-sale, Unrealized Loss Position		721
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		$ 3
State and Political Subdivisions Sales Tax Revenues
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security		2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 6,052
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		99
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		0
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Debt Securities, Available-for-sale, Unrealized Loss Position		6,052
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		$ 99
State and Political Subdivisions Various Tax Revenues
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	8	5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 8,565	$ 8,389
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	843	203
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,494	0
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(327)	0
Debt Securities, Available-for-sale, Unrealized Loss Position	10,059	8,389
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 1,170	$ 203
State and Political Subdivisions Utility Revenues
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security		3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 5,175
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		130
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		0
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Debt Securities, Available-for-sale, Unrealized Loss Position		5,175
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		$ 130
State and Political Subdivisions Other Revenues [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	22	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 25,515	$ 744
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,596	9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	25,515	744
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 2,596	$ 9
Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	17	10
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 15,346	$ 10,534
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	364	314
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,896	990
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(118)	(10)
Debt Securities, Available-for-sale, Unrealized Loss Position	18,242	11,524
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 482	$ 324
Asset-backed Securities [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	12	8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 14,888	$ 10,522
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	123	86
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,653	751
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(157)	(1)
Debt Securities, Available-for-sale, Unrealized Loss Position	17,541	11,273
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 280	$ 87
Tax Exempt State and Political Subdivisions General Obligations [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	17	13
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 30,383	$ 25,555
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,917	261
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	821	853
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(36)	(9)
Debt Securities, Available-for-sale, Unrealized Loss Position	31,204	26,408
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 2,953	$ 270
Tax Exempt State and Political Subdivisions Water and Sewer Revenues [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	6	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 4,792	$ 904
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	505	15
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	4,792	904
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 505	$ 15
Tax Exempt State and Political Subdivisions Lease Revenues [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	2	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 3,291	$ 2,396
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	232	31
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	3,291	2,396
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 232	$ 31
Tax Exempt State and Political Subdivisions Various Tax Revenues
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 7,049
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	782
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	143
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(14)
Debt Securities, Available-for-sale, Unrealized Loss Position	7,192
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 796
Tax Exempt State and Political Subdivisions Other Revenues [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	4	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 7,062	$ 3,558
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	718	15
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	156
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	(1)
Debt Securities, Available-for-sale, Unrealized Loss Position	7,062	3,714
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 718	$ 16