Other Comprehensive Income (Activity in Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Changes in fair value of securities available for sale, before tax	$ (5,958)	$ (934)	$ (7,569)		$ (693)
Changes in fair value of securities available for sale, tax	(2,137)	(333)	(2,695)		(235)
Changes in fair value in securities available for sale	(3,821)	(601)	(4,874)		(458)
Net losses (gains) on securities reclassified into earnings, before tax	0	(299)	613	[1]	(214)	[1]
Net losses (gains) on securities reclassified into earnings, tax	0	(107)	220	[1]	(76)	[1]
Net losses (gains) on securities reclassified into earnings	0	(192)	393	[1]	(138)	[1]
Net change in fair value of securities avialalbe for sale, before tax	(5,958)	(1,233)	(6,956)		(907)
Net change in fair value of securities available for sale, tax	(2,137)	(440)	(2,475)		(311)
Net change in fair value of securities available for sale	(3,821)	(793)	(4,481)		(596)
Reclassification adjustment for other-than-temporary impariment losses transferred into earnings, before tax	0	0	2,159	[2]	124	[2]
Reclassification adjustment for other-than-temporary impairment losses transferred into earnings, tax	0	0	775	[2]	44	[2]
Reclassification adjustment for other-than-temporary impairment losses transferred into earnings	0	0	1,384	[2]	80	[2]
Change in fair value of cash flow hedges, before tax	52	(199)	45		(320)
Change in fair value of cash flow hedges, tax	18	(71)	13		(116)
Change in fair value of cash flow hedges	34	(128)	32		(204)
Net cash flow hedge losses reclassified into earnings, before tax	184	174	374	[3]	347	[3]
Net cash flow hedge losses reclassified into earnings, tax	66	62	134	[3]	124	[3]
Net cash flow hedge losses reclassified into earnings	118	112	240	[3]	223	[3]
Net change in fair value of cash flow hedges, before tax	236	(25)	419		27
Net change in fair value of cash flow hedges, tax	84	(9)	147		8
Net change in fair value of cash flow hedges	152	(16)	272		19
Defined benefit plan obligation adjustment, before tax	454	266	909	[4]	533	[4]
Defined benefit plan obligation adjustment, tax	162	95	280	[4]	177	[4]
Defined benefit plan obligation adjustment, net of tax	292	171	629	[4]	356	[4]
Total other comprehensive (loss) income, before tax	(5,268)	(992)	(3,469)		(223)
Total other comprehensive (loss) income, tax	(1,891)	(354)	(1,273)		(82)
Total other comprehensive (loss) income, net of tax	$ (3,377)	$ (638)	$ (2,196)		$ (141)

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

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

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

[4] Included in salaries and employee benefits expense in the Consolidated Income Statement. See Note 12 and the Annual Report on Form 10‑K for fiscal year 2012 for additional information.