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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Consolidated Statements of Comprehensive Income
Net income	$ 15,138	$ 15,684	$ 15,385
Unrealized holding (losses) gains on available-for-sale securities arising during the period	17,863	(1,155)	(8,624)
Related tax benefit (expense)	(7,183)	445	3,382
Holding (losses) gains after tax on available-for-sale securities	10,680	(710)	(5,242)
Less: Reclassification adjustment for the net (losses) gains realized during the period
Net realized (losses) gains	474	(2,213)	(178)
Income tax benefit (expense) on net realized gains	(198)	882	71
Net realized (losses) gains after tax	276	(1,331)	(107)
Other comprehensive (loss) income on available-for-sale securities	10,404	621	(5,135)
Accretion of net unrealized holding gains on held-to-maturity transferred from available-for-sale securities		5,939	964
Related tax expense		(2,446)	(396)
Other comprehensive income on held-to-maturity securities		3,493	568
Changes in fair value of derivatives used for cashflow hedges	(293)	(363)	(631)
Related tax benefit	130	146	252
Other comprehensive loss on cashflow hedges	(163)	(217)	(379)
Total other comprehensive income (loss) income	10,241	3,897	(4,946)
Total comprehensive income	$ 25,379	$ 19,581	$ 10,439

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