Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 2,029	$ 2,035	$ 1,928	$ 1,701	$ 1,821	$ 1,929	$ 1,780	$ 1,573	$ 1,638	$ 1,631	$ 1,627	$ 1,456	$ 7,693	$ 7,103	$ 6,352
Other comprehensive (loss) income, before tax:
Unrealized holding (loss) gain on available-for-sale securities													(1,213)	(761)	2,878
Reclassification adjustment for net gains realized in income													(9)	(80)	(599)
Net unrealized (loss) gain													(1,222)	(841)	2,279
Tax effect													415	286	(775)
Unrealized (loss) gain, net of tax													(807)	(555)	1,504
Other comprehensive (loss) income, net of tax													(807)	(555)	1,504
Total comprehensive income, net of tax													$ 6,886	$ 6,548	$ 7,856