Consolidated Statement of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net unrealized holding gains/(losses) arising during period on investment securities available for sale, tax	$ (169)	$ (2,355)	$ (1,239)
Reclassification adjustment for gains on investment securities included in operations,tax	13	33	48
Net unrealized gains (losses) on cash flow hedge during the period, tax	$ 63	$ 13	$ (192)