Other Comprehensive Income Tax Effects Allocated to Each Component of Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Comprehensive Income, before Tax [Abstract]
Net unrealized holding gains arising during the period on investment securities available-for-sale, Before Tax Amount	$ 830	$ 1,023	$ 2,202	$ 2,217
Reclassification adjustment for net gains on investment securities available-for-sale realized in net income, Before Tax Amount	0	(4)	(11)	(8)
Total other comprehensive income, Before Tax Amount	830	1,019	2,191	2,209
Other Comprehensive Income, Tax [Abstract]
Net unrealized holding gains arising during the period on investment securities available-for-sale, Tax	(174)	(215)	(462)	(466)
Reclassification adjustment for net gains on investment securities available-for-sale realized in net income, Tax	0	1	2	2
Total other comprehensive income, Tax	(174)	(214)	(460)	(464)
Net unrealized holding gains arising during the period on investment securities available-for-sale	656	808	1,740	1,751
Reclassification adjustment for net gains on sales of investment securities available-for-sale realized in net income	0	(3)	(9)	(6)
Total other comprehensive income, Net of Tax Amount	$ 656	$ 805	$ 1,731	$ 1,745