This item represents the excess of amortized cost basis over fair value of securities in a loss position and which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details

Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the available-for-sale investments determined to be temporarily impaired.

+ References+ Details

- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15C
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 16B
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 35
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=6956420&loc=d3e25351-111560

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-2/124-2
-Paragraph 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Investment Securities (Details 4) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
Investment Securities (Details 4) (USD $)	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Schedule of Available-for-sale Securities [Line Items]
Unrealized loss position on other securities	$ (3,497,000)		$ (3,497,000)		$ (45,824,000)
Investment Securities (Textuals) [Abstract]
Federal Home Loan Bank Stock	121,100,000		121,100,000		121,100,000
Federal Reserve Bank Stock	70,000,000		70,000,000		69,900,000
Impairment charges on securities	(22,000)	(146,000)	(45,000)	(146,000)	0
Obligations of state and political subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of investment securities in an unrealized position less than Twelve months	30		30
Number of investment securities in an unrealized position for Twelve months or more	4		4
Unrealized loss position on other securities	(671,000)		(671,000)		(5,350,000)
Residential mortgage-related securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of investment securities in an unrealized position less than Twelve months	45		45
Number of investment securities in an unrealized position for Twelve months or more	5		5
Unrealized loss position on other securities	(1,011,000)		(1,011,000)		(38,514,000)
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of individual trust preferred debt securities	31		31
Unrealized loss position on other securities	(465,000)		(465,000)		(621,000)
Trust Preferred Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of investment securities in an unrealized position less than Twelve months	3		3
Unrealized loss position on other securities	$ 1,400,000		$ 1,400,000