Consolidated Statements of Comprehensive Income (unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net unrealized gain (loss) on cashflow hedge	$ 336	$ 497	$ 1,772	$ 1,556
Net unrealized gain (loss) on cashflow hedge, deferred tax	81	184	425	576
Net unrealized gain (loss) on available for sale debt securities	(2,861)	608	(7,873)	3,892
Net unrealized gain (loss) on available for sale debt securities, deferred taxes	(687)	225	(1,889)	1,440
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	8	26	828	58
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	2	10	199	21
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	0	0	0	348
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax	$ 0	$ 0	$ 0	$ 129