Fair Value of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financial assets
Accrued interest receivable	$ 5,507	$ 5,091
Financial liabilities
Accrued interest payable	128	166
Level 1
Financial assets
Cash and short-term investments	70,520	67,703
Accrued interest receivable	5,507	5,091
Financial liabilities
Accrued interest payable	128	166
Level 2
Financial assets
Mortgage loans held for sale	3,919	14,431
Federal Home Loan Bank stock and other securities	7,347	6,180
Financial liabilities
Deposits	1,885,158	1,786,046
Short-term borrowings	88,086	75,597
Long-term borrowings	64,582	62,826
Level 3
Financial assets
Loans, net	1,692,142	1,583,018
Level 3 \| Standby letters of credit
Off balance sheet financial instruments
Fair value	(222)	(221)
Carrying amount
Financial assets
Cash and short-term investments	70,520	67,703
Mortgage loans held for sale	3,829	14,047
Federal Home Loan Bank stock and other securities	7,347	6,180
Loans, net	1,680,268	1,552,713
Accrued interest receivable	5,507	5,091
Financial liabilities
Deposits	1,882,451	1,781,693
Short-term borrowings	88,086	75,597
Long-term borrowings	63,322	62,782
Accrued interest payable	128	166
Carrying amount \| Commitments to extend credit
Off balance sheet financial instruments
Fair value	437,249	386,372
Carrying amount \| Standby letters of credit
Off balance sheet financial instruments
Fair value	14,814	14,757
Fair value
Financial assets
Cash and short-term investments	70,520	67,703
Mortgage loans held for sale	3,919	14,431
Federal Home Loan Bank stock and other securities	7,347	6,180
Loans, net	1,692,142	1,583,018
Accrued interest receivable	5,507	5,091
Financial liabilities
Deposits	1,885,158	1,786,046
Short-term borrowings	88,086	75,597
Long-term borrowings	64,582	62,826
Accrued interest payable	128	166
Fair value \| Standby letters of credit
Off balance sheet financial instruments
Fair value	$ (222)	$ (221)

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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 amount shown on the entity's books for investments made in Federal Home Loan Bank stock and other securities.

+ References

No definition available.

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- Definition

The sum of cash and cash equivalents plus Federal Funds Sold. Cash and cash equivalents consist of short term, highly liquid investments that are readily convertible to known amounts of cash and are so near their maturity that they present negligible risk of changes in value due to changes in interest rates -- usually with an original maturity less than 90 days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.1,2,3)

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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.

+ References

No definition available.

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- Definition

The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

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- Definition

Amount of interest payable on debt, including, but not limited to, trade payables.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

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-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.15(a))

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph a

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph 5

-Article 9

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- Definition

Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.8)

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-Number 210

-Section 02

-Paragraph 8

-Article 5

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Glossary Loan

-URI http://asc.fasb.org/extlink&oid=6517073

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- Definition

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.

+ References

No definition available.

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- Definition

Fair value portion of mortgage loans held-for-sale.

+ 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 amount of short-term debt existing as of the balance sheet date.

+ References

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