Stockholders' Equity and Earnings per Share, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2017
Stockholders Equity Note [Abstract]
Beginning Balance	$ 107,425	$ 99,293	$ 102,006	$ 96,388
Ending Balance	109,063	99,575	109,063	99,575
Other comprehensive income, pretax [Abstract]
Unrealized holding gains (losses) arising during the period, pretax	270	(1,017)	3,884	(3,385)
Reclassification adjustment for gains recognized in income, pretax	(286)	0	(312)	(120)
Total change in accumulated other comprehensive income (loss), net, pretax	(16)	(1,017)	3,572	(3,505)
Other Comprehensive Income, Tax Effect [Abstract]
Unrealized holding gains (losses) arising during the period, tax effect	58	(214)	816	(711)
Reclassification adjustment for gains recognized in income, tax effect	(61)	0	(66)	(25)
Total change in accumulated other comprehensive income (loss), net, tax effect	(3)	(214)	750	(736)
Other Comprehensive Income, Net of Tax [Abstract]
Unrealized holding gains (losses) arising during the period, net of tax	212	(803)	3,068	(2,674)
Reclassification adjustment for gains recognized in income, net of tax	(225)	0	(246)	(95)
Other comprehensive income (loss), net of tax	(13)	(803)	2,822	(2,769)
ASU 2018-02 [Member]
Stockholders Equity Note [Abstract]
Reclassification of the income tax effects of the Tax Cuts and Jobs Act from AOCI				0
ASU 2016-01 [Member]
Stockholders Equity Note [Abstract]
Reclassification of net unrealized gains on equity securities from AOCI					$ 0
Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Stockholders Equity Note [Abstract]
Beginning Balance	679	(2,889)	(2,156)	(707)
Net other comprehensive income (loss)	(13)	(803)	2,822	(2,769)
Ending Balance	666	(3,692)	666	(3,692)
Unrealized Gains (Losses) on Available-for-Sale Securities [Member] | ASU 2018-02 [Member]
Stockholders Equity Note [Abstract]
Reclassification of the income tax effects of the Tax Cuts and Jobs Act from AOCI				(139)
Unrealized Gains (Losses) on Available-for-Sale Securities [Member] | ASU 2016-01 [Member]
Stockholders Equity Note [Abstract]
Reclassification of net unrealized gains on equity securities from AOCI					(77)
Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders Equity Note [Abstract]
Beginning Balance	679	(2,889)	(2,156)	(707)
Net other comprehensive income (loss)	(13)	(803)	2,822	(2,769)
Ending Balance	666	(3,692)	666	(3,692)
Other Comprehensive Income, Net of Tax [Abstract]
Other comprehensive income (loss), net of tax	$ (13)	$ (803)	$ 2,822	(2,769)
Accumulated Other Comprehensive Income (Loss) [Member] | ASU 2018-02 [Member]
Stockholders Equity Note [Abstract]
Reclassification of the income tax effects of the Tax Cuts and Jobs Act from AOCI				$ (139)
Accumulated Other Comprehensive Income (Loss) [Member] | ASU 2016-01 [Member]
Stockholders Equity Note [Abstract]
Reclassification of net unrealized gains on equity securities from AOCI					$ (77)