Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance	$ 60,007	$ 56,142
Reclassification of net unrealized gains on equity securities from accumulated other comprehensive income (loss)	62	662
Other comprehensive income (loss) before reclassifications	1,897	(1,228)
Balance	65,976	58,277
Gains (Losses) on Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance	172	37
Other comprehensive income (loss) before reclassifications	(369)	250
Balance	(197)	287
Unrealized Gains (Losses) on Available for Sale Securities [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance	(850)	(37)
Reclassification of net unrealized gains on equity securities from accumulated other comprehensive income (loss)		(10)
Other comprehensive income (loss) before reclassifications	2,266	(1,478)
Balance	1,416	(1,525)
Supplemental Executive Retirement Plans [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance	140	125
Balance	140	125
Accumulated Other Comprehensive Income (Loss) [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Balance	(538)	125
Reclassification of net unrealized gains on equity securities from accumulated other comprehensive income (loss)		(10)
Balance	$ 1,359	$ (1,113)