Other Comprehensive Income Tax Effects Allocated to Each Component of Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Other Comprehensive Income, before Tax [Abstract]
Net unrealized holding gains (losses) arising during the year on investment securities available-for-sale, Before-Tax Amount	$ 2,099	$ 2,568
Reclassification adjustment for net gains on investment securities available-for-sale realized in net income, Before-Tax Amount	(11)	(25)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	2,088	2,543
Other Comprehensive Income, Tax [Abstract]
Net unrealized holding gains (losses) arising during the period on investment securities available-for-sale, Tax	(440)	(539)
Reclassification adjustment for net gains on investment securities available-for-sale realized in net income, Tax	2	5
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(438)	(534)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net unrealized holding gains arising during the year on investment securities available-for-sale	1,659	2,029
Reclassification adjustments for investment securities available-for-sale	(9)	(20)
Total other comprehensive income	$ 1,650	$ 2,009

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