Supplemental Comprehensive Income Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Supplemental Comprehensive Income Disclosures [Abstract]
Unrealized holding gains on securities arising during the period	$ 2,543	$ 10,070
Reclassification adjustment for gains on securities included in net income	(652)	0
Total unrealized gains on securities	1,891	10,070
Unrealized holding (losses) gains on derivatives arising during the period	(516)	1,735
Unrealized holding gains on securities arising during the period	(890)	(3,524)
Reclassification adjustment for gains on derivatives included in net income, before Tax	78	(15)
Total unrealized gain on derivatives	(438)	1,720
Reclassification adjustment for gains on securities included in net income	228	0
Total other comprehensive (loss) income	1,453	11,790
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	(662)	(3,524)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	181	(607)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	(28)	5
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Total	153	(602)
Other Comprehensive Income (Loss), Tax	(509)	(4,126)
Other comprehensive income (loss) before reclassification adjustment	1,653	6,546
Total unrealized (losses) gains on securities	1,229	6,546
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(335)	1,128
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	(50)	10
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Total	(285)	1,118
Total other comprehensive (loss) income	944	7,664
Reclassification adjustment for gains on securities included in net income	$ 424	$ 0