Fair Values Fair Value By Balance Sheet Grouping (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	$ 48,832	$ 43,736	$ 31,079	$ 67,116
Available-for-sale Securities	478,698	556,538
Available-For-Sale Securities, at Fair Value	478,698	556,538
Held-to-Maturity Securities	239,803	150,688
Federal Home Loan Bank and Federal Reserve Bank Stock	5,792	6,722
Net Loans	1,157,043	1,116,454
Accrued Interest Receivable	5,486	6,082
Deposits	1,731,155	1,644,046
Federal Home Loan Bank Term Advances	30,000	40,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000
Accrued Interest Payable	584	1,147
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	48,832	43,736
Available-for-sale Securities	478,698	556,538
Held-to-Maturity Securities	239,803	150,688
Federal Home Loan Bank and Federal Reserve Bank Stock	5,792	6,722
Net Loans	1,157,043	1,116,454
Accrued Interest Receivable	5,486	6,082
Deposits	1,731,155	1,644,046
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	12,678	26,293
Federal Home Loan Bank Term Advances	59,000	82,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000
Accrued Interest Payable	584	1,147
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	48,832	43,736
Available-For-Sale Securities, at Fair Value	478,698	556,538
Held-to-maturity Securities, Fair Value Disclosure	248,252	159,059
Federal Home Loan Bank Stock and Federal Reserve Bank Stock, Fair Value Disclosure	5,792	6,722
Net Loans, Fair Value Disclosure	1,192,628	1,141,310
Accrued Interest Receivable, Fair Value Disclosure	5,486	6,082
Deposits, Fair Value Disclosure	1,732,894	1,650,849
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase, Fair Value Disclosure	12,678	26,293
Federal Home Loan Bank Term Advances, Fair Value Disclosure	60,312	83,553
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	584	1,147
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	48,832	43,736
Available-For-Sale Securities, at Fair Value	0	257
Held-to-maturity Securities, Fair Value Disclosure	0	0
Federal Home Loan Bank Stock and Federal Reserve Bank Stock, Fair Value Disclosure	5,792	6,722
Net Loans, Fair Value Disclosure	0	0
Accrued Interest Receivable, Fair Value Disclosure	5,486	6,082
Deposits, Fair Value Disclosure	1,447,882	1,291,388
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase, Fair Value Disclosure	12,678	26,293
Federal Home Loan Bank Term Advances, Fair Value Disclosure	29,000	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0
Accrued Interest Payable, Fair Value Disclosure	584	1,147
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Available-For-Sale Securities, at Fair Value	478,698	556,281
Held-to-maturity Securities, Fair Value Disclosure	248,252	159,059
Federal Home Loan Bank Stock and Federal Reserve Bank Stock, Fair Value Disclosure	0	0
Net Loans, Fair Value Disclosure	0	0
Accrued Interest Receivable, Fair Value Disclosure	0	0
Deposits, Fair Value Disclosure	285,012	359,461
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase, Fair Value Disclosure	0	0
Federal Home Loan Bank Term Advances, Fair Value Disclosure	31,312	83,553
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Available-For-Sale Securities, at Fair Value	0	0
Held-to-maturity Securities, Fair Value Disclosure	0	0
Federal Home Loan Bank Stock and Federal Reserve Bank Stock, Fair Value Disclosure	0	0
Net Loans, Fair Value Disclosure	1,192,628	1,141,310
Accrued Interest Receivable, Fair Value Disclosure	0	0
Deposits, Fair Value Disclosure	0	0
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase, Fair Value Disclosure	0	0
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0
Accrued Interest Payable, Fair Value Disclosure	$ 0	$ 0

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

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

-Publisher FASB

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-Number FAS115-1/124-1

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 12

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

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-Number 115

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

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-Name Statement of Financial Accounting Standard (FAS)

-Number 133

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