Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 1,173	$ 916	$ 2,535	$ 2,065
Securities available for sale:
Unrealized holding gains (losses) on available-for-sale securities	1,292	(1,767)	2,438	(1,088)
Tax effect	(440)	600	(830)	369
Reclassification adjustment for net gains realized in net income	(17)		(375)
Tax effect	6		128
Total securities available-for-sale	841	(1,167)	1,361	(719)
Change in post-retirement obligations	12	(23)	25	(45)
Total other comprehensive income (loss)	853	(1,190)	1,386	(764)
Total comprehensive income (loss)	$ 2,026	$ (274)	$ 3,921	$ 1,301