Securities (Schedule of Unrealized Losses) (Details) $ in Thousands	Sep. 30, 2018 USD ($) security	Dec. 31, 2017 USD ($) security
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Less Than 12 Months | security	30	52
Fair Value, Less Than 12 Months	$ 30,288	$ 72,395
Unrealized Losses, Less Than 12 Months	$ (730)	$ (745)
Number of Securities, Twelve Months or More | security	65	42
Fair Value, 12 Months or More	$ 105,859	$ 65,975
Unrealized Losses, 12 Months or More	$ (4,932)	$ (1,690)
Number of Securities, Total | security	95	94
Fair Value, Total	$ 136,147	$ 138,370
Unrealized Losses, Total	$ (5,662)	$ (2,435)
Obligations of U.S. Government Agencies and Corporations [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Less Than 12 Months | security		5
Fair Value, Less Than 12 Months		$ 10,845
Unrealized Losses, Less Than 12 Months		$ (157)
Number of Securities, Twelve Months or More | security	20	15
Fair Value, 12 Months or More	$ 33,702	$ 23,369
Unrealized Losses, 12 Months or More	$ (1,294)	$ (627)
Number of Securities, Total | security	20	20
Fair Value, Total	$ 33,702	$ 34,214
Unrealized Losses, Total	$ (1,294)	$ (784)
Obligations of State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Less Than 12 Months | security	21	23
Fair Value, Less Than 12 Months	$ 10,804	$ 10,491
Unrealized Losses, Less Than 12 Months	$ (121)	$ (70)
Number of Securities, Twelve Months or More | security	8	6
Fair Value, 12 Months or More	$ 6,208	$ 3,862
Unrealized Losses, 12 Months or More	$ (323)	$ (108)
Number of Securities, Total | security	29	29
Fair Value, Total	$ 17,012	$ 14,353
Unrealized Losses, Total	$ (444)	$ (178)
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Less Than 12 Months | security	9	23
Fair Value, Less Than 12 Months	$ 19,484	$ 51,050
Unrealized Losses, Less Than 12 Months	$ (609)	$ (518)
Number of Securities, Twelve Months or More | security	37	20
Fair Value, 12 Months or More	$ 65,949	$ 38,740
Unrealized Losses, 12 Months or More	$ (3,315)	$ (955)
Number of Securities, Total | security	46	43
Fair Value, Total	$ 85,433	$ 89,790
Unrealized Losses, Total	$ (3,924)	$ (1,473)
Debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Less Than 12 Months | security		51
Fair Value, Less Than 12 Months		$ 72,386
Unrealized Losses, Less Than 12 Months		$ (745)
Number of Securities, Twelve Months or More | security		41
Fair Value, 12 Months or More		$ 65,971
Unrealized Losses, 12 Months or More		$ (1,690)
Number of Securities, Total | security		92
Fair Value, Total		$ 138,357
Unrealized Losses, Total		$ (2,435)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Less Than 12 Months | security		1
Fair Value, Less Than 12 Months		$ 9
Number of Securities, Twelve Months or More | security		1
Fair Value, 12 Months or More		$ 4
Number of Securities, Total | security		2
Fair Value, Total		$ 13