Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Other Comprehensive Income
Net unrealized gain on securities available-for-sale, before tax	$ 890	$ 2,395	$ 2,055	$ 8,358
Less: Reclassification adjustment for net gains included in net income, before tax	(26)	(498)	(531)	(1,122)
Total unrealized gain, before tax	864	1,897	1,524	7,236
Net unrealized gain (loss) on derivatives, before tax	(125)	(1,616)	1,629	(9,019)
Less: Reclassification adjustment for losses included in net income, before tax	(439)	(742)	(1,019)	(742)
Total unrealized gain (loss) on derivatives, before tax	(564)	(2,358)	610	(9,761)
Other Comprehensive Income (Loss), before tax	300	(461)	2,134	(2,525)
Net unrealized gain on securities available-for-sale, tax effect	369	958	828	3,343
Less: Reclassification adjustment for net gains included in net income, tax	(10)	(199)	(199)	(449)
Total unrealized gain, tax effect	359	759	629	2,894
Net unrealized gain (loss) on derivatives, tax effect	(50)	(646)	626	(3,607)
Less: Reclassification adjustment for losses included in net income, tax effect	(169)	297	(381)	(297)
Total unrealized gain (loss) on derivatives, tax effect	(219)	(349)	245	(3,904)
Other Comprehensive Income (Loss), tax effect	140	410	874	(1,010)
Net unrealized gain on securities available-for-sale, net of tax	521	1,437	1,227	5,015
Less: Reclassification adjustment for net gains included in net income, net of tax	(16)	(299)	(332)	(673)
Total unrealized gain on investment securities	505	1,138	895	4,342
Net unrealized gain (loss) on derivatives, net of tax	(75)	(970)	1,003	(5,412)
Less: Reclassification adjustment for losses included in net income, net of tax	(270)	(445)	(638)	(445)
Total unrealized (loss) gain on derivatives	(345)	(1,415)	365	(5,857)
Other Comprehensive Income (Loss), net of tax	$ 160	$ (277)	$ 1,260	$ (1,515)