Other Comprehensive Income Tax Effects Allocated to Each Component of Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Other Comprehensive Income, before Tax [Abstract]
Net unrealized holding gains arising during the period on investment securities available-for-sale, Before Tax Amount	$ 1,372	$ 1,194
Reclassification adjustment for net gains on investment securities available-for-sale realized in net income, Before Tax Amount	(11)	(4)
Total other comprehensive income, Before Tax Amount	1,361	1,190
Other Comprehensive Income, Tax [Abstract]
Net unrealized holding gains arising during the period on investment securities available-for-sale, Tax	(288)	(251)
Reclassification adjustment for net gains on investment securities available-for-sale realized in net income, Tax	2	1
Total other comprehensive income, Tax	(286)	(250)
Net unrealized holding gains arising during the period on investment securities available-for-sale	1,084	943
Reclassification adjustment for net gains on sales of investment securities available-for-sale realized in net income	(9)	(3)
Total other comprehensive income, Net of Tax Amount	$ 1,075	$ 940

Amount before tax, after reclassification adjustments of other comprehensive income (loss).

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