Stockholders' Equity and Earnings per Share, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Stockholders Equity Note [Abstract]
Beginning Balance	$ 115,869	$ 107,425	$ 109,756	$ 102,006
Ending Balance	116,875	109,063	116,875	109,063
Other comprehensive income (loss), pretax [Abstract]
Unrealized holding gains arising during the period, pretax	573	269	5,100	3,884
Reclassification adjustment for gains recognized in income, pretax	(1)	(286)	(185)	(312)
Total change in accumulated other comprehensive income (loss), net, pretax	572	(17)	4,915	3,572
Other Comprehensive Income (loss), Tax Effect [Abstract]
Unrealized holding gains arising during the period, tax effect	120	56	1,071	816
Reclassification adjustment for gains recognized in income, tax effect	0	(61)	(39)	(66)
Total change in accumulated other comprehensive income (loss), net, tax effect	120	(4)	1,032	750
Other Comprehensive Income (loss), Net of Tax [Abstract]
Unrealized holding gains arising during the period, net of tax	453	212	4,029	3,068
Reclassification adjustment for gains recognized in income, net of tax	(1)	(225)	(146)	(246)
Other comprehensive income (loss), net of tax	452	(13)	3,883	2,822
Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Stockholders Equity Note [Abstract]
Beginning Balance	3,352	679	(79)	(2,156)
Net other comprehensive income (loss)	452	(13)	3,883	2,822
Ending Balance	3,804	666	3,804	666
Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders Equity Note [Abstract]
Beginning Balance	3,352	679	(79)	(2,156)
Net other comprehensive income (loss)	452	(13)	3,883	2,822
Ending Balance	3,804	666	3,804	666
Other Comprehensive Income (loss), Net of Tax [Abstract]
Other comprehensive income (loss), net of tax	$ 452	$ (13)	$ 3,883	$ 2,822