Supplemental Comprehensive Income Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Supplemental Comprehensive Income Disclosures [Abstract]
Unrealized holding gains on securities arising during the period	$ 3,802	$ (3,814)	$ 13,872	$ 6,166
Reclassification adjustment for gains on securities included in net income	(28)	(20)	(28)	(125)
Total unrealized gains on securities	3,774	(3,834)	13,844	6,041
Unrealized holding gains (losses) on derivatives arising during the period	359	(527)	2,094	668
Unrealized holding gains on securities arising during the period	(1,331)	1,335	(4,855)	(2,156)
Reclassification adjustment for gains on derivatives included in net income, before Tax	(26)	(11)	(41)	(6)
Total unrealized gain on derivatives	333	(538)	2,053	662
Reclassification adjustment for gains on securities included in net income	10	7	10	44
Total other comprehensive (loss) income	4,107	(4,372)	15,897	6,703
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	(1,321)	1,342	(4,845)	(2,112)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	(126)	184	(733)	(234)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	9	4	14	2
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Total	(117)	188	(719)	(232)
Other Comprehensive Income (Loss), Tax	(1,438)	1,530	(5,564)	(2,344)
Other comprehensive income (loss) before reclassification adjustment	2,471	(2,479)	9,017	4,010
Total unrealized (losses) gains on securities	2,453	(2,492)	8,999	3,929
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	233	(343)	1,361	434
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	17	7	27	4
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Total	216	(350)	1,334	430
Total other comprehensive (loss) income	2,669	(2,842)	10,333	4,359
Reclassification adjustment for gains on securities included in net income	$ 18	$ 13	$ 18	$ 81