Other Comprehensive Income (Loss) Tax Effects Allocated to Each Component of Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Comprehensive Income, before Tax [Abstract]
Net unrealized holding gains (losses) arising during the period on investment securities available-for-sale, Before Tax Amount	$ 558	$ (446)	$ 2,775	$ (1,920)
Reclassification adjustment for net gains on investment securities available-for-sale realized in net income, Before Tax Amount			(8)	0
Total other comprehensive income (loss), Before Tax Amount	558	(446)	2,767	(1,920)
Other Comprehensive Income, Tax [Abstract]
Net unrealized holding gains (losses) arising during the period on investment securities available-for-sale, Tax	(117)	94	(583)	404
Reclassification adjustment for net gains on investment securities available-for-sale realized in net income, Tax			2	0
Total other comprehensive income (loss), Tax	(117)	94	(581)	404
Net unrealized holding gains (losses) arising during the period on investment securities available-for-sale	441	(352)	2,192	(1,516)
Reclassification adjustment for net gains on sales of investment securities available-for-sale realized in net income	0	0	(6)	0
Total other comprehensive income (loss), Net of Tax Amount	$ 441	$ (352)	$ 2,186	$ (1,516)