Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 4,378	$ 3,869	$ 1,784
Securities available for sale:
Unrealized holding (losses) gains on available-for-sale securities	(692)	5,465	(3,166)
Tax effect	235	(1,858)	1,076
Reclassification adjustment for other-than-temporary impairment losses on debt securities			1,954
Tax effect			(664)
Reclassification adjustment for net gains realized in net income	(75)	(588)	(535)
Tax effect	26	200	182
Total securities available-for-sale	(506)	3,219	(1,153)
Change in post-retirement obligations	(108)	45	(28)
Total other comprehensive (loss) income	(614)	3,264	(1,181)
Total comprehensive income	$ 3,764	$ 7,133	$ 603