Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 1,972	$ 2,147	$ 6,811	$ 4,329
Securities available for sale:
Unrealized holding (losses) gains on available-for-sale securities	(1,395)	254	(4,444)	1,821
Tax effect	292	(86)	933	(619)
Reclassification adjustment for net losses (gains) realized in net income		7	21	(24)
Tax effect		(3)	(4)	8
Total securities available-for-sale	(1,103)	172	(3,494)	1,186
Change in post-retirement obligations	(8)	(5)	95	(16)
Total other comprehensive (loss) income	(1,111)	167	(3,399)	1,170
Total comprehensive income	$ 861	$ 2,314	$ 3,412	$ 5,499

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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