Accumulated Other Comprehensive Income (Schedule of Reclassifications from Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (loss) on sale of investment securities	$ 20	$ (2)		$ (4)		$ 5	$ 107	$ (58)	$ (147)				$ 14	$ 54	$ (147)
Provision for income taxes	(584)	(611)	$ (591)	(540)	$ (525)	(559)	(539)	(506)	872	$ (658)	$ (739)	$ (681)	(2,326)	(2,129)	(1,206)
Net income	$ 2,714	$ 3,058	$ 3,002	$ 2,802	$ 2,847	$ 2,863	$ 2,768	$ 2,528	$ 2,327	$ 2,226	$ 2,183	$ 1,980	11,576	11,006	8,716
Reclassified from Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes													(3)	(2)	50
Net income													11	8	(97)
Unrealized Gains (Losses) on Available-for-Sale Securities [Member] | Reclassified from Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (loss) on sale of investment securities													$ 14	$ 10	$ (147)