Securities (Summary Of Securities Available For Sale In Unrealized Loss Position) (Details) $ in Thousands	Jun. 30, 2021 USD ($) security	Dec. 31, 2020 USD ($) security
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	110	78
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 80,003	$ 30,171
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	874	155
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	56,881	59,645
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(917)	(1,590)
Debt Securities, Available-for-sale, Unrealized Loss Position	136,884	89,816
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 1,791	$ 1,745
US Government Corporations and Agencies Securities [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	40	36
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 8,691	$ 12,611
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	17	54
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	24,162	14,384
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(346)	(340)
Debt Securities, Available-for-sale, Unrealized Loss Position	32,853	26,995
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 363	$ 394
Government Sponsored Agencies [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	10	10
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 2,898	$ 3,127
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	62	34
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	8,836	8,593
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(233)	(315)
Debt Securities, Available-for-sale, Unrealized Loss Position	11,734	11,720
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 295	$ 349
Nongovernment Sponsored Agencies [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	7	6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 8,923	$ 6,770
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	103	35
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,895	2,751
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(164)	(209)
Debt Securities, Available-for-sale, Unrealized Loss Position	11,818	9,521
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 267	$ 244
State and Political Subdivisions General Obligations [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	14	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 12,710	$ 362
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	146	4
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	12,710	362
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 146	$ 4
State and Policital Subdivisions Water and Sewer 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	$ 1,516
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1
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	1,516
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 1
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	$ 1,474
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	21
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	1,474
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 21
State and Political Subdivisions Insurance Premium Revenue
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	$ 3,045
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	16
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	3,045
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 16
State and Political Subdivisions Other Revenues [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 5,173
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	111
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	5,173
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 111
Corporate Debt Securities [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	$ 9,683	$ 3,952
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	169	16
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,988	1,904
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(12)	(96)
Debt Securities, Available-for-sale, Unrealized Loss Position	11,671	5,856
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 181	$ 112
Asset-backed Securities [Member]
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	10	16
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 5,262	$ 2,010
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	20	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	18,844	31,862
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(161)	(623)
Debt Securities, Available-for-sale, Unrealized Loss Position	24,106	33,872
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 181	$ 625
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	8	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 20,628	$ 924
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	208	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	20,628	924
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 208	$ 9
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	1	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 415
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	156	151
Debt Securities Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1)	(7)
Debt Securities, Available-for-sale, Unrealized Loss Position	156	566
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 1	$ 8