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Fair Value of Financial Assets and Liabilities, Estimated Fair Value Of Financial Instruments and Indication of Level Within Fair Value Hierarchy of Valuation Techniques (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financial assets: [Abstract]
Securities available-for-sale	$ 647,536	$ 609,405
Securities held-to-maturity	1,632	1,601
Mortgage servicing rights	3,062	3,424
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets: [Abstract]
Cash and cash equivalents	137,973	106,641
Certificates of deposits in other banks	0	0
Securities available-for-sale	24,751	52,782
Securities held-to-maturity	0	0
Loans held for sale	912	845
Loans, net	0	0
Federal Home Loan Bank stock	0	0
Federal Reserve Bank stock	0	0
Accrued interest receivable	0	0
Mortgage servicing rights	0	0
Financial liabilities: [Abstract]
Deposits	651,588	621,321
Repurchase agreements	0	0
Federal funds purchased	0	0
Advances from Federal Home Loan Bank	0	0
Long-term debt	0	0
Accrued interest payable	0	0
Unrecognized financial instruments: [Abstract]
Letters of credit	0	0
Commitments to extend credit	0	0
Forward sale commitments	0	0
Significant Other Observable Inputs (Level 2) [Member]
Financial assets: [Abstract]
Cash and cash equivalents	0	0
Certificates of deposits in other banks	9,505	9,582
Securities available-for-sale	622,785	556,623
Securities held-to-maturity	1,632	1,601
Loans held for sale	0	0
Loans, net	0	0
Federal Home Loan Bank stock	17,927	25,673
Federal Reserve Bank stock	4,887	4,886
Accrued interest receivable	12,354	12,886
Mortgage servicing rights	0	0
Financial liabilities: [Abstract]
Deposits	2,232,133	2,230,608
Repurchase agreements	0	0
Federal funds purchased	15,205	12,465
Advances from Federal Home Loan Bank	1,464	1,531
Long-term debt	0	0
Accrued interest payable	1,522	1,032
Unrecognized financial instruments: [Abstract]
Letters of credit	0	0
Commitments to extend credit	0	0
Forward sale commitments	0	0
Significant Unobservable Inputs (Level 3) [Member]
Financial assets: [Abstract]
Cash and cash equivalents	0	0
Certificates of deposits in other banks	0	0
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Loans held for sale	0	0
Loans, net	2,613,007	2,589,811
Federal Home Loan Bank stock	0	0
Federal Reserve Bank stock	0	0
Accrued interest receivable	0	0
Mortgage servicing rights	3,062	3,424
Financial liabilities: [Abstract]
Deposits	0	0
Repurchase agreements	218,121	207,992
Federal funds purchased	0	0
Advances from Federal Home Loan Bank	0	0
Long-term debt	35,501	31,362
Accrued interest payable	0	0
Unrecognized financial instruments: [Abstract]
Letters of credit	0	0
Commitments to extend credit	0	0
Forward sale commitments	0	0
Carrying Amount [Member]
Financial assets: [Abstract]
Cash and cash equivalents	137,973	106,641
Certificates of deposits in other banks	9,473	9,568
Securities available-for-sale	647,536	609,405
Securities held-to-maturity	1,662	1,662
Loans held for sale	895	828
Loans, net	2,598,992	2,581,346
Federal Home Loan Bank stock	17,927	25,673
Federal Reserve Bank stock	4,887	4,886
Accrued interest receivable	12,354	12,886
Mortgage servicing rights	3,062	3,424
Financial liabilities: [Abstract]
Deposits	2,887,189	2,855,074
Repurchase agreements	217,979	208,067
Federal funds purchased	15,205	12,465
Advances from Federal Home Loan Bank	1,228	1,286
Long-term debt	61,341	61,341
Accrued interest payable	1,522	1,032
Unrecognized financial instruments: [Abstract]
Letters of credit	0	0
Commitments to extend credit	0	0
Forward sale commitments	$ 0	$ 0

X

- Definition

This item represents management's methodology (for example, procedures or techniques) for estimating the fair value as of the balance sheet date of the financial instrument (as defined), including financial assets and financial liabilities (collectively, as defined).

+ References

No definition available.

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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 the sum of advances from federal home loan bank liability.

+ References

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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 the certificates of deposits in other bank asset.

+ References

No definition available.

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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 commitments to extend credit as of the balance sheet date.

+ References

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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 forward sale commitments of the balance sheet date.

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- Definition

This item represents management's methodology (for example, procedures or techniques) for estimating the fair value as of the balance sheet date of federal reserve bank stock.

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No definition available.

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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 the sum of trade and related party payables and accrued expenses as of the balance sheet date.

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- Definition

Fair value portion of trade and related party payables and accrued expenses.

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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

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- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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-Publisher FASB

-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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- Definition

Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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No definition available.

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- Definition

Fair value portion of short term borrowing where a bank borrows, at the federal funds rate, from another bank and securities that an entity sells and agrees to repurchase at a specified date for a specified price.

+ References

No definition available.

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Fair value of investments in debt securities classified as held-to-maturity.

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Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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The fair value amount of long-term debt 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.

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Fair value portion of securities that an entity sells and agrees to repurchase at a specified date for a specified price.

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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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