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Investment Securities (Schedule of Unrealized Losses Not Recognized in Income) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	$ 54,492	$ 104,108
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(323)	(4,714)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	10,752	21,597
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	(1,618)	(5,432)
Investment Securities Available-for-Sale: Total, fair value	65,244	125,705
Investment Securities Available-for-Sale: Total, unrealized losses	(1,941)	(10,146)
Investment Securities Held-to-Maturity: Less than 12 months, fair value	932	18,187
Investment Securities Held-to-Maturity: 12 months or less, unrealized losses		(103)
Investment Securities Held-to-Maturity: 12 months or longer, unrealized losses	(5)
Investment Securities Held-to-Maturity: Total, fair value	932	18,187
Investment Securities Held-to-Maturity: Total, unrealized losses	5
Temporarily Impaired Securities, Total Fair Value	66,176	143,892
Temporarily Impaired Securities, Total Unrealized Losses	(1,946)	(10,249)
Temporarily Impaired Securities, Less than 12 Months, Fair Value	55,424	122,295
Temporarily Impaired Securities, Less than 12 Months, Aggregate Losses	(328)	(4,817)
Temporarily Impaired Securities, 12 months or longer, Fair Value	10,752	21,597
Temporarily Impaired Securities, 12 months or longer, Aggregate losses	(1,618)	(5,432)
U.S. treasury notes [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	4,460
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(23)
Investment Securities Available-for-Sale: Total, fair value	4,460
Investment Securities Available-for-Sale: Total, unrealized losses	(23)
Federal agency obligations [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	877
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(5)
Investment Securities Available-for-Sale: Total, fair value	877
Investment Securities Available-for-Sale: Total, unrealized losses	(5)
Investment Securities Held-to-Maturity: Less than 12 months, fair value		11,980
Investment Securities Held-to-Maturity: 12 months or less, unrealized losses		(34)
Investment Securities Held-to-Maturity: Total, fair value		11,980
Commercial mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Investment Securities Held-to-Maturity: Less than 12 months, fair value	932	6,207
Investment Securities Held-to-Maturity: 12 months or less, unrealized losses		(69)
Investment Securities Held-to-Maturity: 12 months or longer, unrealized losses	(5)
Investment Securities Held-to-Maturity: Total, fair value	932	6,207
Investment Securities Held-to-Maturity: Total, unrealized losses	5
Residential mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	1,669	2,013
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(1)	(6)
Investment Securities Available-for-Sale: Total, fair value	1,669	2,013
Investment Securities Available-for-Sale: Total, unrealized losses	(1)	(6)
Obligations of U.S. states and political subdivisions [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	18,360	4,352
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(132)	(36)
Investment Securities Available-for-Sale: Total, fair value	18,360	4,352
Investment Securities Available-for-Sale: Total, unrealized losses	(132)	(36)
Trust preferred securities [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	10,494	4,325
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(18)	(996)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	1,246	10,947
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	(1,156)	(3,398)
Investment Securities Available-for-Sale: Total, fair value	11,740	15,272
Investment Securities Available-for-Sale: Total, unrealized losses	(1,174)	(4,394)
Corporate bonds and notes [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	18,244	89,534
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(134)	(3,663)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	8,196	7,509
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	(237)	(414)
Investment Securities Available-for-Sale: Total, fair value	26,440	97,043
Investment Securities Available-for-Sale: Total, unrealized losses	(371)	(4,077)
Collateralized mortgage obligations [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: 12 Months or Longer, fair value		1,899
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses		(1,327)
Investment Securities Available-for-Sale: Total, fair value		1,899
Investment Securities Available-for-Sale: Total, unrealized losses		(1,327)
Asset-backed securities [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value		3,884
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses		(13)
Investment Securities Available-for-Sale: Total, fair value		3,884
Investment Securities Available-for-Sale: Total, unrealized losses		(13)
Certificates of Deposit [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	388
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(10)
Investment Securities Available-for-Sale: Total, fair value	388
Investment Securities Available-for-Sale: Total, unrealized losses	(10)
Equity securities [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	325	262
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	(210)	(273)
Investment Securities Available-for-Sale: Total, fair value	325	262
Investment Securities Available-for-Sale: Total, unrealized losses	(210)	(273)
Other securities [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	985	980
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	(15)	(20)
Investment Securities Available-for-Sale: Total, fair value	985	980
Investment Securities Available-for-Sale: Total, unrealized losses	$ (15)	$ (20)

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