Accumulated Other Comprehensive Income - Change in other comprehensive income for the period (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning of period			$ 1,677	$ 3,794
Unrealized holding gains	$ 938	$ (1,780)	2,285	(644)
Reclassification adjustment			(246)	(91)
Unrealized loss on interest rate swaps			(185)	(1)
Reclassification adjustment	0	0	0	(4)
Balance end of period	3,531	3,054	3,531	3,054
Unrealized holding gains (losses), tax	(483)	916	(1,176)	333
Reclassification adjustment, tax	72	13	127	47
Unrealized loss on interest rate swaps tax	17	(29)	95	0
Reclassification adjustment, derivative, tax	0	0	0	2
Unrealized Gains on Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning of period			1,872	3,979
Unrealized holding gains			2,285	(644)
Reclassification adjustment			(246)	(91)
Unrealized loss on interest rate swaps			0	0
Reclassification adjustment				0
Balance end of period	3,911	3,244	3,911	3,244
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning of period			(195)	(185)
Unrealized holding gains			0	0
Reclassification adjustment			0	0
Unrealized loss on interest rate swaps			(185)	(1)
Reclassification adjustment				(4)
Balance end of period	$ (380)	$ (190)	$ (380)	$ (190)