Supplemental Comprehensive Income Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Supplemental Comprehensive Income Disclosures [Abstract]
Unrealized holding (losses) gains on securities arising during the period	$ (3,814)	$ 9,950	$ 6,166	$ 22,407
Reclassification adjustment for gains on securities included in net income	(20)	(2)	(125)	(2)
Total unrealized (losses) gains on securities	(3,834)	9,948	6,041	22,405
Unrealized holding (losses) gains on derivatives arising during the period	(527)	0	668	0
Unrealized holding (losses) gains on securities arising during the period	1,335	(3,479)	(2,156)	(7,840)
Reclassification adjustment for gains on derivatives included in net income, before Tax	(11)	0	(6)	0
Total unrealized gain on derivatives	(538)	0	662	0
Reclassification adjustment for gains on securities included in net income	7	1	44	1
Total other comprehensive (loss) income	(4,372)	9,948	6,703	22,405
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	1,342	(3,478)	(2,112)	(7,839)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	184	0	(234)	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	4	0	2	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Total	188	0	(232)	0
Other Comprehensive Income (Loss), Tax	1,530	(3,478)	(2,344)	(7,839)
Other comprehensive income (loss) before reclassification adjustment	(2,479)	6,471	4,010	14,567
Total unrealized (losses) gains on securities	(2,492)	6,470	3,929	14,566
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(343)	0	434	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	7	0	4	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Total	(350)	0	430	0
Total other comprehensive (loss) income	(2,842)	6,470	4,359	14,566
Reclassification adjustment for gains on securities included in net income	$ 13	$ 1	$ 81	$ 1