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Allowance for Loan Losses (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Allowance for Loan Losses: |  |
Beginning balance | $ 4,182,000 | $ 4,473,000
Provisions | 1,525,000 | 1,825,000
Charge-offs | (1,198,000) | (2,427,000)
Recoveries | 227,000 | 311,000
Ending balance | 4,736,000 | 4,182,000
Ending allowance balance attributable to loans: |  |
Individually evaluated for impairment | 1,652,000 | 1,658,000
Collectively evaluated for impairment | 3,084,000 | 2,524,000
Ending balance | 4,736,000 | 4,182,000
Recorded Investment in Loans: |  |
Individually evaluated for impairment | 7,583,000 | 7,401,000
Collectively evaluated for impairment | 278,653,000 | 273,955,000
Recorded investment in loans | 286,236,000 | 281,356,000
Residential |  |
Allowance for Loan Losses: |  |
Beginning balance | 828,000 | 1,024,000
Provisions | 496,000 | 609,000
Charge-offs | (418,000) | (819,000)
Recoveries | 16,000 | 14,000
Ending balance | 922,000 | 828,000
Ending allowance balance attributable to loans: |  |
Individually evaluated for impairment | 213,000 | 183,000
Collectively evaluated for impairment | 709,000 | 645,000
Ending balance | 922,000 | 828,000
Recorded Investment in Loans: |  |
Individually evaluated for impairment | 2,370,000 | 2,281,000
Collectively evaluated for impairment | 106,233,000 | 114,587,000
Recorded investment in loans | 108,603,000 | 116,868,000
Land |  |
Allowance for Loan Losses: |  |
Beginning balance | 93,000 | 55,000
Provisions | (19,000) | 38,000
Charge-offs | (4,000) | 0
Recoveries | 1,000 | 0
Ending balance | 71,000 | 93,000
Ending allowance balance attributable to loans: |  |
Individually evaluated for impairment | 0 | 0
Collectively evaluated for impairment | 71,000 | 93,000
Ending balance | 71,000 | 93,000
Recorded Investment in Loans: |  |
Individually evaluated for impairment | 125,000 | 5,000
Collectively evaluated for impairment | 9,532,000 | 9,967,000
Recorded investment in loans | 9,657,000 | 9,972,000
Construction |  |
Allowance for Loan Losses: |  |
Beginning balance | 33,000 | 21,000
Provisions | (33,000) | 8,000
Charge-offs | 0 | 0
Recoveries | 0 | 4,000
Ending balance | 0 | 33,000
Ending allowance balance attributable to loans: |  |
Individually evaluated for impairment | 0 | 0
Collectively evaluated for impairment | 0 | 33,000
Ending balance | 0 | 33,000
Recorded Investment in Loans: |  |
Individually evaluated for impairment | 403,000 | 247,000
Collectively evaluated for impairment | 11,360,000 | 6,732,000
Recorded investment in loans | 11,763,000 | 6,979,000
Commercial Real Estate |  |
Allowance for Loan Losses: |  |
Beginning balance | 1,269,000 | 1,051,000
Provisions | 145,000 | 614,000
Charge-offs | (104,000) | (396,000)
Recoveries | 0 | 0
Ending balance | 1,310,000 | 1,269,000
Ending allowance balance attributable to loans: |  |
Individually evaluated for impairment | 275,000 | 539,000
Collectively evaluated for impairment | 1,035,000 | 730,000
Ending balance | 1,310,000 | 1,269,000
Recorded Investment in Loans: |  |
Individually evaluated for impairment | 2,836,000 | 2,853,000
Collectively evaluated for impairment | 66,066,000 | 54,987,000
Recorded investment in loans | 68,902,000 | 57,840,000
Commercial Business |  |
Allowance for Loan Losses: |  |
Beginning balance | 1,160,000 | 1,251,000
Provisions | 70,000 | 197,000
Charge-offs | (17,000) | (333,000)
Recoveries | 10,000 | 45,000
Ending balance | 1,223,000 | 1,160,000
Ending allowance balance attributable to loans: |  |
Individually evaluated for impairment | 1,098,000 | 936,000
Collectively evaluated for impairment | 125,000 | 224,000
Ending balance | 1,223,000 | 1,160,000
Recorded Investment in Loans: |  |
Individually evaluated for impairment | 1,776,000 | 1,928,000
Collectively evaluated for impairment | 16,879,000 | 18,848,000
Recorded investment in loans | 18,655,000 | 20,776,000
Home Equity and Second Mortgage |  |
Allowance for Loan Losses: |  |
Beginning balance | 400,000 | 606,000
Provisions | 834,000 | 322,000
Charge-offs | (342,000) | (577,000)
Recoveries | 27,000 | 49,000
Ending balance | 919,000 | 400,000
Ending allowance balance attributable to loans: |  |
Individually evaluated for impairment | 66,000 | 0
Collectively evaluated for impairment | 853,000 | 400,000
Ending balance | 919,000 | 400,000
Recorded Investment in Loans: |  |
Individually evaluated for impairment | 73,000 | 87,000
Collectively evaluated for impairment | 37,213,000 | 38,800,000
Recorded investment in loans | 37,286,000 | 38,887,000
Other Consumer |  |
Allowance for Loan Losses: |  |
Beginning balance | 399,000 | 465,000
Provisions | 32,000 | 37,000
Charge-offs | (313,000) | (302,000)
Recoveries | 173,000 | 199,000
Ending balance | 291,000 | 399,000
Ending allowance balance attributable to loans: |  |
Individually evaluated for impairment | 0 | 0
Collectively evaluated for impairment | 291,000 | 399,000
Ending balance | 291,000 | 399,000
Recorded Investment in Loans: |  |
Individually evaluated for impairment | 0 | 0
Collectively evaluated for impairment | 31,370,000 | 30,034,000
Recorded investment in loans | $ 31,370,000 | $ 30,034,000

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- Definition Reflects the amount charged against earnings during the period as bad debt expense, net of recoveries of previously expensed credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -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. 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 210.9-03.7(d)) -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 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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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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