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Recorded Investment in Loans by Risk Category (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Dec. 31, 2011
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | $ 286,626 | $ 281,356
Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 261,431 | 258,826
Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 9,214 | 8,385
Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 7,989 | 6,744
Doubtful |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 7,992 | 7,401
Unlikely to be Collected Financing Receivable |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 0 | 0
Residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 112,105 | 116,868
Residential | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 105,004 | 113,037
Residential | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 2,113 | 862
Residential | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 2,290 | 688
Residential | Doubtful |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 2,698 | 2,281
Residential | Unlikely to be Collected Financing Receivable |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 0 | 0
Land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 9,707 | 9,972
Land | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 7,306 | 7,578
Land | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 268 | 255
Land | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 2,129 | 2,134
Land | Doubtful |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 4 | 5
Land | Unlikely to be Collected Financing Receivable |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 0 | 0
Construction |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 11,896 | 6,979
Construction | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 11,303 | 6,217
Construction | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 199 | 307
Construction | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 0 | 208
Construction | Doubtful |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 394 | 247
Construction | Unlikely to be Collected Financing Receivable |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 0 | 0
Commercial Real Estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 64,106 | 57,840
Commercial Real Estate | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 53,670 | 46,544
Commercial Real Estate | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 4,917 | 5,392
Commercial Real Estate | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 2,533 | 3,051
Commercial Real Estate | Doubtful |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 2,986 | 2,853
Commercial Real Estate | Unlikely to be Collected Financing Receivable |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 0 | 0
Commercial Business |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 19,192 | 20,776
Commercial Business | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 15,264 | 16,961
Commercial Business | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 1,526 | 1,462
Commercial Business | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 593 | 425
Commercial Business | Doubtful |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 1,809 | 1,928
Commercial Business | Unlikely to be Collected Financing Receivable |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 0 | 0
Home Equity and Second Mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 37,644 | 38,887
Home Equity and Second Mortgage | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 37,009 | 38,513
Home Equity and Second Mortgage | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 136 | 63
Home Equity and Second Mortgage | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 398 | 224
Home Equity and Second Mortgage | Doubtful |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 101 | 87
Home Equity and Second Mortgage | Unlikely to be Collected Financing Receivable |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 0 | 0
Other Consumer |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 31,976 | 30,034
Other Consumer | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 31,875 | 29,976
Other Consumer | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 55 | 44
Other Consumer | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 46 | 14
Other Consumer | Doubtful |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | 0 | 0
Other Consumer | Unlikely to be Collected Financing Receivable |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Recorded investment in loans | $ 0 | $ 0

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e -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. + Details
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