Stockholders' Equity and Earnings per Share, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Stockholders Equity Note [Abstract]
Beginning Balance	$ 110,044	$ 105,019	$ 109,756	$ 102,006
Ending Balance	115,869	107,425	115,869	107,425
Other comprehensive income, pretax [Abstract]
Unrealized holding gains arising during the period, pretax	5,090	1,639	4,527	3,615
Reclassification adjustment for gains recognized in income, pretax	(184)	0	(184)	(26)
Total change in accumulated other comprehensive income (loss), net, pretax	4,906	1,639	4,343	3,589
Other Comprehensive Income, Tax Effect [Abstract]
Unrealized holding gains arising during the period, tax effect	1,069	344	951	759
Reclassification adjustment for gains recognized in income, tax effect	(39)	0	(39)	(5)
Total change in accumulated other comprehensive income (loss), net, tax effect	1,030	344	912	754
Other Comprehensive Income, Net of Tax [Abstract]
Unrealized holding gains arising during the period, net of tax	4,021	1,295	3,576	2,856
Reclassification adjustment for gains recognized in income, net of tax	(145)	0	(145)	(21)
Other comprehensive income, net of tax	3,876	1,295	3,431	2,835
Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Stockholders Equity Note [Abstract]
Beginning Balance	(524)	(616)	(79)	(2,156)
Net other comprehensive income	3,876	1,295	3,431	2,835
Ending Balance	3,352	679	3,352	679
Accumulated Other Comprehensive Income [Member]
Stockholders Equity Note [Abstract]
Beginning Balance	(524)	(616)	(79)	(2,156)
Net other comprehensive income	3,876	1,295	3,431	2,835
Ending Balance	3,352	679	3,352	679
Other Comprehensive Income, Net of Tax [Abstract]
Other comprehensive income, net of tax	$ 3,876	$ 1,295	$ 3,431	$ 2,835