Stockholders' Equity and Earnings per Share, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017
Stockholders Equity Note [Abstract]
Beginning Balance	$ 105,019	$ 94,998	$ 102,006	$ 96,388
Ending Balance	107,425	99,293	107,425	99,293
Other comprehensive income, pretax [Abstract]
Unrealized holding gains (losses) arising during the period, pretax	1,639	(152)	3,615	(2,368)
Reclassification adjustment for gains recognized in income, pretax	0	(40)	(26)	(120)
Total change in accumulated other comprehensive income (loss), net, pretax	1,639	(192)	3,589	(2,488)
Other Comprehensive Income, Tax Effect [Abstract]
Unrealized holding gains (losses) arising during the period, tax effect	344	(32)	759	(497)
Reclassification adjustment for gains recognized in income, tax effect	0	(8)	(5)	(25)
Total change in accumulated other comprehensive income (loss), net, tax effect	344	(40)	754	(522)
Other Comprehensive Income, Net of Tax [Abstract]
Unrealized holding gains (losses) arising during the period, net of tax	1,295	(120)	2,856	(1,871)
Reclassification adjustment for gains recognized in income, net of tax	0	(32)	(21)	(95)
Other comprehensive income (loss), net of tax	1,295	(152)	2,835	(1,966)
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	(616)	(2,737)	(2,156)	(707)
Net other comprehensive income (loss)	1,295	(152)	2,835	(1,966)
Ending Balance	679	(2,889)	679	(2,889)
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	(616)	(2,737)	(2,156)	(707)
Net other comprehensive income (loss)	1,295	(152)	2,835	(1,966)
Ending Balance	679	(2,889)	679	(2,889)
Other Comprehensive Income, Net of Tax [Abstract]
Other comprehensive income (loss), net of tax	$ 1,295	$ (152)	$ 2,835	(1,966)
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)