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Commitments, Contingencies and Concentrations of Credit Risk (Schedule of Fair Value Off Balance Sheet Risks) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Supply Commitment [Line Items]
Off-balance sheet commitements	$ 244,863	$ 201,139
Standby letters of credit [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	1,700	1,800
Performance Letters of Credit [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	27,743	20,482
Commercial and industrial [Member] | Loans and lines of credit [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	129,797	90,866
Home Equity Line of Credit [Member] | Loans and lines of credit [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	46,795	49,203
Commercial Real Estate Portfolio Segment [Member] | Loans and lines of credit [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	30,955	32,938
Residential Portfolio Segment [Member] | Loans and lines of credit [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	2,207
Overdraft protection lines [Member] | Loans and lines of credit [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	$ 5,666	$ 5,850

X

- Definition

The floor amount as of the balance sheet date that the entity must expend to satisfy the terms of disclosed arrangements (excluding long-term commitments) in which the entity must commit resources to supply goods or services to one or more customers.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 17

-Article 9



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.17)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.25)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.(a)(19))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 25

-Article 5



Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 19

-Article 7

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_SupplyCommitmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration