Stockholders' Equity and Earnings per Common Share, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2018
Stockholders Equity Note [Abstract]
Beginning Balance		$ 96,388	$ 93,990
Ending Balance		102,006	96,388
Other comprehensive income, pretax [Abstract]
Unrealized holding gains (losses) arising during the period, pretax		(1,440)	1,659
Reclassification adjustment for gains (loss) recognized in income, pretax		(120)	(96)
Net unrealized gains (losses) on securities		(1,560)	1,563
Net actuarial loss for the period, pretax			(99)
Amortization of actuarial loss from prior period, pretax		0	490
Net change, pretax			3,741
Total change in accumulated other comprehensive loss, pretax		(1,560)	5,304
Other Comprehensive Income, Tax Effect [Abstract]
Unrealized holding gains (losses) arising during the period, tax effect		(302)	564
Reclassification adjustment for gains (losses) recognized in income, tax effect		(25)	(33)
Net unrealized losses on securities, tax effect			531
Net actuarial loss for the period, tax effect			(34)
Amortization of actuarial loss from prior period, tax effect		0	167
Net change, tax effect			1,272
Total change in other comprehensive loss, tax effect		(327)	1,803
Other Comprehensive Income, Net of Tax [Abstract]
Unrealized holding gains (losses) arising during the period, net of tax		(1,138)	1,095
Reclassification adjustment for gains (losses) recognized in income, net of tax		(95)	(63)
Net unrealized losses on securities, net of tax		(1,233)	1,032
Net actuarial loss for the period, net of tax			(65)
Amortization of actuarial loss from prior period, net of tax		0	323
Net change, net of tax		0	2,469
Total change in accumulated other comprehensive loss, net, net of tax		(1,233)	3,501
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		(707)	(1,739)
Net change for the year		(1,449)	1,032
Net other comprehensive loss		(1,233)
Ending Balance		(2,156)	(707)
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)
Defined Benefit Pension Plans [Member]
Stockholders Equity Note [Abstract]
Beginning Balance		0	(2,469)
Net change for the year	[1]	0	2,469
Net other comprehensive loss		0
Ending Balance		0	0
Defined Benefit Pension Plans [Member] | ASU 2018-02 [Member]
Stockholders Equity Note [Abstract]
Reclassification of the income tax effects of the Tax Cuts and Jobs Act			0
Defined Benefit Pension Plans [Member] | ASU 2016-01 [Member]
Stockholders Equity Note [Abstract]
Reclassification of net unrealized gains on equity securities from AOCI			0
Accumulated Other Comprehensive Loss [Member]
Stockholders Equity Note [Abstract]
Beginning Balance		(707)	(4,208)
Net change for the year		(1,449)	3,501
Net other comprehensive loss		(1,233)
Ending Balance		(2,156)	(707)
Other Comprehensive Income, Net of Tax [Abstract]
Total change in accumulated other comprehensive loss, net, net of tax		$ (1,233)	3,501
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)	$ (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)	$ (77)

[1] Net change reflects termination and settlement of pension plan during year ended December 31, 2017.