Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance	$ 67,122	$ 60,007
Other comprehensive income (loss) before reclassifications	1,799	1,897
Balance	72,207	65,976
Gains (Losses) on Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance	(78)	172
Other comprehensive income (loss) before reclassifications	(348)	(369)
Balance	(426)	(197)
Unrealized Gains (Losses) on Available for Sale Securities [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance	1,292	(850)
Other comprehensive income (loss) before reclassifications	2,147	2,266
Balance	3,439	1,416
Supplemental Executive Retirement Plans [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance	157	140
Balance	157	140
Accumulated Other Comprehensive Income (Loss) [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance	1,371	(538)
Balance	$ 3,170	$ 1,359