Consolidated Statements of Comprehensive Income (unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net unrealized gain (loss) on cashflow hedge	$ 496	$ 270	$ 1,437	$ 1,059
Net unrealized gain (loss) on cashflow hedge, deferred tax	119	100	345	392
Net unrealized gain (loss) on available for sale debt securities	(625)	2,983	(5,013)	3,286
Net unrealized gain (loss) on available for sale debt securities, deferred taxes	(150)	1,104	(1,203)	1,216
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	87	90	819	32
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	21	33	197	12
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	0	348	0	348
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax	$ 0	$ 129	$ 0	$ 129