Stockholders' Equity and Earnings per Share, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2017
Stockholders Equity Note [Abstract]
Beginning Balance	$ 102,006	$ 96,388
Ending Balance	105,019	94,998
Other comprehensive income, pretax [Abstract]
Unrealized holding gains (losses) arising during the period, pretax	1,975	(2,217)
Reclassification adjustment for gains recognized in income, pretax	(26)	(80)
Total change in accumulated other comprehensive loss, net, pretax	1,949	(2,297)
Other Comprehensive Income, Tax Effect [Abstract]
Unrealized holding gains (losses) arising during the period, tax effect	414	(466)
Reclassification adjustment for gains recognized in income, tax effect	(5)	(17)
Total change in accumulated other comprehensive loss, net, tax effect	409	(483)
Other Comprehensive Income, Net of Tax [Abstract]
Unrealized holding gains (losses) arising during the period, net of tax	1,561	(1,751)
Reclassification adjustment for gains recognized in income, net of tax	(21)	(63)
Other comprehensive income (loss), net of tax	1,540	(1,814)
ASU 2018-02 [Member]
Stockholders Equity Note [Abstract]
Reclassification of the income tax effects of the Tax Cuts and Jobs Act			$ 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	(2,156)	(707)
Net other comprehensive income (loss)	1,540	(1,814)
Ending Balance	(616)	(2,737)
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			(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 Loss [Member]
Stockholders Equity Note [Abstract]
Beginning Balance	(2,156)	(707)
Net other comprehensive income (loss)	1,540	(1,814)
Ending Balance	(616)	(2,737)
Other Comprehensive Income, Net of Tax [Abstract]
Other comprehensive income (loss), net of tax	$ 1,540	$ (1,814)
Accumulated Other Comprehensive Loss [Member] | ASU 2018-02 [Member]
Stockholders Equity Note [Abstract]
Reclassification of the income tax effects of the Tax Cuts and Jobs Act			(139)
Accumulated Other Comprehensive Loss [Member] | ASU 2016-01 [Member]
Stockholders Equity Note [Abstract]
Reclassification of net unrealized gains on equity securities from AOCI			$ (77)