Collateral underlying mortgage investments terms.

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- Definition

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

+ References

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- Definition

This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 6

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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-Name Emerging Issues Task Force (EITF)

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-Paragraph 21

-Subparagraph a(2)

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- Definition

This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 9

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-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 21

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This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investments accounted for under the cost method of accounting as of the balance sheet date.

+ References

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 6

-Subparagraph a

-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.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 325

-SubTopic 20

-Section 25

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- Definition

Amount of Federal Home Loan Bank (FHLB) and Federal Reserve Bank stock.

+ References

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- Definition

The cash inflow associated with the sale of debt securities classified as available-for-sale securities.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

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-Section 45

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-Name Accounting Standards Codification

-Glossary Investing Activities

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-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 16

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-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.

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-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.

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-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.

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- Definition

Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 45

-Paragraph 1

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-Name FASB Staff Position (FSP)

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Securities (Details Textual) (USD $)	12 Months Ended
Securities (Details Textual) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Securities (Additional Textual) [Abstract]
Proceeds from sale of securities	$ 256,102,000	$ 52,689,000	$ 107,821,000
Gains from sale of securities	7,833,000	1,239,000	3,687,000
Gross losses	214,000	19,000
Federal Home Loan Bank and Federal Reserve Bank stock	11,800,000
Fair value of cost method investment securities	11,800,000
Collateral Underlying Mortgage Investments Terms	30- and 15-year fixed and 10/1 adjustable rate mortgages
Mortgage Backed Securities And Collateralized Mortgage Obligations Of US Government Sponsored Entities [Member]
Securities (Textual) [Abstract]
Aggregate Losses	1,500,000
Fair Value, Total	208,900,000
Private collateralized mortgage obligations [Member]
Securities (Textual) [Abstract]
Aggregate Losses	530,000	3,487,000
Fair Value, Total	39,190,000	59,897,000
Carrying Amount [Member] \| Collateralized mortgage obligations of U.S. Government Sponsored Entities [Member]
Securities (Textual) [Abstract]
Securities	103,351,000
Carrying Amount [Member] \| Private collateralized mortgage obligations [Member]
Securities (Textual) [Abstract]
Securities	167,993,000
Fair Value [Member] \| Collateralized mortgage obligations of U.S. Government Sponsored Entities [Member]
Securities (Textual) [Abstract]
Securities	103,400,000
Fair Value [Member] \| Private collateralized mortgage obligations [Member]
Securities (Textual) [Abstract]
Securities	$ 167,993,000