Other Comprehensive Income (Activity in Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Changes in fair value of securities available for sale, before tax	$ 2,837		$ (5,958)		$ 3,801		$ (7,569)
Changes in fair value of securities available for sale, tax	1,020		(2,137)		1,372		(2,695)
Changes in fair value in securities available for sale	1,817		(3,821)		2,429		(4,874)
Net losses (gains) on securities reclassified into earnings, before tax	0	[1]	0	[1]	0	[1]	613	[1]
Net losses (gains) on securities reclassified into earnings, tax	0	[1]	0	[1]	0	[1]	220	[1]
Net losses (gains) on securities reclassified into earnings	0	[1]	0	[1]	0	[1]	393	[1]
Net change in fair value of securities available for sale, before tax	2,837		(5,958)		3,801		(6,956)
Net change in fair value of securities available for sale, tax	1,020		(2,137)		1,372		(2,475)
Net change in fair value of securities available for sale	1,817		(3,821)		2,429		(4,481)
Reclassification adjustment for other-than-temporary impariment losses transferred into earnings, before tax	0	[2]	0	[2]	0	[2]	2,159	[2]
Reclassification adjustment for other-than-temporary impairment losses transferred into earnings, tax	0	[2]	0	[2]	0	[2]	775	[2]
Reclassification adjustment for other-than-temporary impairment losses transferred into earnings	0	[2]	0	[2]	0	[2]	1,384	[2]
Change in fair value of cash flow hedges, before tax	19		52		(24)		45
Change in fair value of cash flow hedges, tax	33		18		6		13
Change in fair value of cash flow hedges	(14)		34		(30)		32
Net cash flow hedge losses reclassified into earnings, before tax	145	[3]	184	[3]	290	[3]	374	[3]
Net cash flow hedge losses reclassified into earnings, tax	52	[3]	66	[3]	105	[3]	134	[3]
Net cash flow hedge losses reclassified into earnings	93	[3]	118	[3]	185	[3]	240	[3]
Net change in fair value of cash flow hedges, before tax	164		236		266		419
Net change in fair value of cash flow hedges, tax	85		84		111		147
Net change in fair value of cash flow hedges	79		152		155		272
Defined benefit plan obligation adjustment, before tax	127	[4]	454	[4]	254	[4]	909	[4]
Defined benefit plan obligation adjustment, tax	46	[4]	162	[4]	85	[4]	280	[4]
Defined benefit plan obligation adjustment, net of tax	81	[4]	292	[4]	169	[4]	629	[4]
Total other comprehensive (loss) income, before tax	3,128		(5,268)		4,321		(3,469)
Total other comprehensive (loss) income, tax	1,151		(1,891)		1,568		(1,273)
Total other comprehensive (loss) income, net of tax	$ 1,977		$ (3,377)		$ 2,753		$ (2,196)

[1] Reported as total other-than-temporary impairment losses on securities in the Consolidated Statements of Income.

[2] Reported as the portion of loss recognized in other comprehensive income in the Consolidated Statements of Income.

[3] Included in interest expense on junior subordinated debentures in the Consolidated Statements of Income.

[4] Included in salaries and employee benefits expense in the Consolidated Statements of Income.