Other Comprehensive Income (Activity in Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Unrealized (losses) gains on securities arising during the period, before tax	$ (1,611)		$ 241
Unrealized (losses) gains on securities arising during the period, tax	(558)		98
Changes in fair value in securities available for sale	(1,053)		143
Less: reclassification adjustment for net gains on securities realized in net income, before tax	(613)	[1]	(85)	[1]
Less: reclassification adjustment for net gains on securities realized in net income, tax	(220)	[1]	(30)	[1]
Less: net losses on securities reclassified into earnings	393	[1]	55	[1]
Net unrealized (losses) gains on securities available for sale, before tax	(998)		326
Net unrealized (losses) gains on securities available for sale, tax	(338)		128
Net change in fair value of securities available for sale	(660)		198
Reclassification adjustment for change in non-credit portion of OTTI realized losses transferred to net income, before tax	2,159	[2]	124	[2]
Reclassification adjustment for change in non-credit portion of OTTI realized losses transferred to net income, tax	775	[2]	44	[2]
Reclassification adjustment for other-than-temporary impairment losses transferred into earnings	(1,384)	[2]	(80)	[2]
Unrealized losses on cash flow hedges arising during the period, before tax	(7)		(119)
Unrealized losses on cash flow hedges arising during the period, tax	(5)		(44)
Change in fair value of cash flow hedges	(2)		(75)
Less: reclassification adjustment for amount of gains on cash flow hedges realized in net income, before tax	190	[3]	171	[3]
Less: reclassification adjustment for amount of gains on cash flow hedges realized in net income, tax	68	[3]	61	[3]
Less: net cash flow hedge losses reclassified into earnings	(122)	[3]	(110)	[3]
Net unrealized (losses) gains on cash flow hedges, before tax	183		52
Net unrealized (losses) gains on cash flow hedges, tax	63		17
Net change in fair value of cash flow hedges	120		35
Defined benefit plan obligation adjustment, before tax	455	[4]	266	[4]
Defined benefit plan obligation adjustment, tax	118	[4]	82	[4]
Defined benefit plan obligation adjustment, net of tax	337	[4]	184	[4]
Total other comprehensive (loss) income, before tax	1,799		768
Total other comprehensive (loss) income, tax	618		271
Total other comprehensive (loss) income, net of tax	$ 1,181		$ 497

[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.