Loans, net and allowance for loan losses, Nonaccrual Loans by Major Loan Category (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Information concerning nonaccrual loans by major loan category [Abstract]
Nonaccrual loans, Total	$ 5,523	$ 7,930
Major categories of the loan portfolio by past due status [Abstract]
30-59 Days Past Due	3,814	3,896
60-89 Days Past Due	941	639
Greater than 90 Days	737	685
Total Past Due	5,233	5,220
Current	451,821	439,883
Total	457,054	445,103
Loans > 90 Days and Accruing	737	660
Commercial [Member]
Information concerning nonaccrual loans by major loan category [Abstract]
Nonaccrual loans, Total	4,143	5,871
Major categories of the loan portfolio by past due status [Abstract]
30-59 Days Past Due	1,143	408
60-89 Days Past Due	100	324
Greater than 90 Days	2	12
Total Past Due	1,245	744
Current	166,479	160,084
Total	167,724	160,828
Loans > 90 Days and Accruing	2	12
Real Estate Commercial [Member]
Information concerning nonaccrual loans by major loan category [Abstract]
Nonaccrual loans, Total	259	1,170
Major categories of the loan portfolio by past due status [Abstract]
30-59 Days Past Due	1,228	2,177
60-89 Days Past Due	318
Greater than 90 Days	22
Total Past Due	1,568	2,177
Current	152,874	143,377
Total	154,442	145,554
Loans > 90 Days and Accruing	22
Real Estate Residential [Member]
Information concerning nonaccrual loans by major loan category [Abstract]
Nonaccrual loans, Total	1,121	889
Major categories of the loan portfolio by past due status [Abstract]
30-59 Days Past Due	1,269	976
60-89 Days Past Due	397	217
Greater than 90 Days	297	362
Total Past Due	1,950	1,555
Current	113,083	116,570
Total	115,033	118,125
Loans > 90 Days and Accruing	297	337
Consumer [Member]
Major categories of the loan portfolio by past due status [Abstract]
30-59 Days Past Due	174	335
60-89 Days Past Due	126	98
Greater than 90 Days	416	311
Total Past Due	470	744
Current	19,385	19,852
Total	19,855	20,596
Loans > 90 Days and Accruing	$ 416	$ 311

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Financing receivables that are less than 60 days past due but more than 29 days past due.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953401-111524

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- Definition

Financing receivables that are less than 90 days past due but more than 59 days past due.

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- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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-Section 50

-Paragraph 7

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Financing receivables that are current.

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- Definition

Financing receivables that are equal to or greater than 90 days past due.

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

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Recorded Investment in financing receivables that are past due at the balance sheet date.

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- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

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

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Section 563c.102

-Paragraph 8

-Subparagraph e

-Chapter V

-Subsection I

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-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 116

-IssueDate 2006-05-01

-Chapter 8

-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

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-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

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