Securities (Schedule Of Gross Unrealized Losses And Fair Value, Aggregated By Investment Category And Length Of Time) (Details) $ in Thousands	Sep. 30, 2018 USD ($) security	Dec. 31, 2017 USD ($) security
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Number of Securities | security	94	53
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Fair Value	$ 75,207	$ 56,489
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Unrealized Losses	$ (1,624)	$ (333)
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Number of Securities | security	30	14
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Fair Value	$ 52,360	$ 38,713
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Unrealized Losses	$ (3,423)	$ (1,511)
Total temporarily impaired debt securities, available-for-sale, Total, Number of Securities | security	124	67
Total temporarily impaired debt securities, available-for-sale, Total, Fair Value	$ 127,567	$ 95,202
Total temporarily impaired debt securities, available-for-sale, Total, Unrealized Losses	$ (5,047)	$ (1,844)
U.S. Treasury Notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Number of Securities | security	0	0
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Fair Value	$ 0	$ 0
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Unrealized Losses	$ 0	$ 0
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Number of Securities | security	3	3
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Fair Value	$ 13,572	$ 14,071
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Unrealized Losses	$ (1,207)	$ (687)
Total temporarily impaired debt securities, available-for-sale, Total, Number of Securities | security	3	3
Total temporarily impaired debt securities, available-for-sale, Total, Fair Value	$ 13,572	$ 14,071
Total temporarily impaired debt securities, available-for-sale, Total, Unrealized Losses	$ (1,207)	$ (687)
U.S. Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Number of Securities | security	0	1
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Fair Value	$ 0	$ 989
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Unrealized Losses	$ 0	$ (12)
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Number of Securities | security	4	4
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Fair Value	$ 14,742	$ 16,314
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Unrealized Losses	$ (1,258)	$ (700)
Total temporarily impaired debt securities, available-for-sale, Total, Number of Securities | security	4	5
Total temporarily impaired debt securities, available-for-sale, Total, Fair Value	$ 14,742	$ 17,303
Total temporarily impaired debt securities, available-for-sale, Total, Unrealized Losses	$ (1,258)	$ (712)
U.S. Agency Mortgage-Backed, Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Number of Securities | security	36	25
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Fair Value	$ 46,566	$ 43,329
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Unrealized Losses	$ (1,107)	$ (261)
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Number of Securities | security	11	2
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Fair Value	$ 16,963	$ 5,051
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Unrealized Losses	$ (658)	$ (95)
Total temporarily impaired debt securities, available-for-sale, Total, Number of Securities | security	47	27
Total temporarily impaired debt securities, available-for-sale, Total, Fair Value	$ 63,529	$ 48,380
Total temporarily impaired debt securities, available-for-sale, Total, Unrealized Losses	$ (1,765)	$ (356)
State And Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Number of Securities | security	58	27
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Fair Value	$ 28,641	$ 12,171
Total temporarily impaired debt securities, available-for-sale, Less than 12 months, Unrealized Losses	$ (517)	$ (60)
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Number of Securities | security	12	5
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Fair Value	$ 7,083	$ 3,277
Total temporarily impaired debt securities, available-for-sale, 12 months or more, Unrealized Losses	$ (300)	$ (29)
Total temporarily impaired debt securities, available-for-sale, Total, Number of Securities | security	70	32
Total temporarily impaired debt securities, available-for-sale, Total, Fair Value	$ 35,724	$ 15,448
Total temporarily impaired debt securities, available-for-sale, Total, Unrealized Losses	$ (817)	$ (89)