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Recorded Investment in Nonperforming Loans by Class of Loans (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Nonaccrual Loans | $ 7,488 | $ 7,401
Loans 90+ Days Past Due Still Accruing | 85 | 363
Total Nonperforming Loans | 8,689 | 11,515
Nonperforming Financing Receivable |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonperforming Loans | 7,573 | 7,764
Residential |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Nonaccrual Loans | 2,370 | 2,281
Loans 90+ Days Past Due Still Accruing | 0 | 143
Total Nonperforming Loans | 5,646 | 7,308
Residential | Nonperforming Financing Receivable |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonperforming Loans | 2,370 | 2,424
Land |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Nonaccrual Loans | 41 | 5
Loans 90+ Days Past Due Still Accruing | 0 | 38
Total Nonperforming Loans | 209 | 528
Land | Nonperforming Financing Receivable |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonperforming Loans | 41 | 43
Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Nonaccrual Loans | 265 | 247
Loans 90+ Days Past Due Still Accruing | 0 | 0
Total Nonperforming Loans | 265 | 247
Construction | Nonperforming Financing Receivable |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonperforming Loans | 265 | 247
Commercial Real Estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Nonaccrual Loans | 2,730 | 2,853
Loans 90+ Days Past Due Still Accruing | 2 | 0
Total Nonperforming Loans | 1,627 | 1,934
Commercial Real Estate | Nonperforming Financing Receivable |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonperforming Loans | 2,732 | 2,853
Commercial Business |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Nonaccrual Loans | 1,843 | 1,928
Loans 90+ Days Past Due Still Accruing | 0 | 0
Total Nonperforming Loans | 38 | 256
Commercial Business | Nonperforming Financing Receivable |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonperforming Loans | 1,843 | 1,928
Home Equity and Second Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Nonaccrual Loans | 239 | 87
Loans 90+ Days Past Due Still Accruing | 67 | 159
Total Nonperforming Loans | 560 | 876
Home Equity and Second Mortgage | Nonperforming Financing Receivable |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonperforming Loans | 306 | 246
Other Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Nonaccrual Loans | 0 | 0
Loans 90+ Days Past Due Still Accruing | 16 | 23
Total Nonperforming Loans | 344 | 366
Other Consumer | Nonperforming Financing Receivable |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Nonperforming Loans | $ 16 | $ 23

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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 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5111-111524 + Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5111-111524 + Details
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- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + 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 + Details
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