Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Consolidated Statements of Comprehensive Income [Abstract]
Net income		$ 808	$ 2,411	$ 2,286	$ 2,441	$ 2,313	$ 1	$ 1,109	$ 1,556	$ 7,946	$ 4,979
Other Comprehensive Income (Loss):
Unrealized holding losses on AFS investment securities arising during the period, Before tax amount										(117)	(56)
Unrealized holding losses on AFS investment securities arising during the period, Tax effect										40	19
Unrealized holding losses on AFS investment securities arising during the period										(77)	(37)
Accretion of discount on AFS to HTM reclassification, Before tax amount	[1]									8	9
Accretion of discount on AFS to HTM reclassification, Tax effect	[2]									(3)	(3)
Accretion of discount on AFS to HTM reclassification										5	6
Less reclassification for gains on sales of AFS investment securities included in net income, Before Tax amount	[3]									(9)	(410)
Less reclassification for gains on sales of AFS investment securities included in net income, Tax effect	[2]									3	139
Less reclassification for gains on sales of AFS investment securities included in net income										(6)	(271)
Other comprehensive loss - securities										(78)	(302)
Unrealized actuarial (losses) gains - pension, Before tax amount										(57)	20
Unrealized actuarial (losses) gains - pension, Tax effect										19	(7)
Unrealized actuarial (losses) gains - pension										(38)	13
Total other comprehensive loss										(116)	(289)
Total comprehensive income										$ 7,830	$ 4,690

[1] Amounts are included in "Interest and dividends on investment securities" in the consolidated statements of income.

[2] Amounts are included in "Income tax expense" in the consolidated statements of income.

[3] Amounts are included in "Gains on sale of investment securities, net" in the consolidated statements of income.