Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other Comprehensive Income
Net unrealized gain (loss) on securities available-for-sale, before tax	$ (6,221)	$ 1,165
Less: Reclassification adjustment for net gains/loss included in net income, before tax	(42)	(505)
Total unrealized gain (loss), before tax	(6,263)	660
Net unrealized gain (loss) on derivatives, before tax	2,607	1,752
Less: Reclassification adjustment for gains/losses included in net income, before tax	(88)	(578)
Total unrealized gain (loss) on derivatives, before tax	2,519	1,174
Other Comprehensive Income (Loss), before tax	(3,744)	1,834
Net unrealized gain (loss) on securities available-for-sale, tax effect	1,098	453
Less: Reclassification adjustment for net gains/loss included in net income, tax	(11)	(183)
Total unrealized gain (loss), tax effect	1,087	270
Net unrealized gain (loss) on derivatives, tax effect	374	673
Less: Reclassification adjustment for gains/losses included in net income, tax effect	(23)	(209)
Total unrealized gain (loss) on derivatives, tax effect	351	464
Other Comprehensive Income (Loss), tax effect	1,438	734
Net unrealized gain (loss) on securities available-for-sale, net of tax	(5,123)	712
Less: Reclassification adjustment for net gains/loss included in net income, net of tax	(31)	(322)
Total unrealized loss on investment securities	(5,154)	390
Net unrealized gain (loss) on derivatives, net of tax	2,233	1,079
Less: Reclassification adjustment for gains/losses included in net income, net of tax	(65)	(369)
Total unrealized gain (loss) on derivatives	2,168	710
Other comprehensive income (loss)	$ (2,986)	$ 1,100