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Risk Ratings of Loans by Categories of Loans (Detail) (USD $) | Dec. 31, 2012 Loan | Dec. 31, 2011 Loan | Dec. 31, 2010 Loan
--- | --- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | $ 254,022,692 | $ 237,723,480 | $ 234,285,696
Non-accrual | 4,008,665 | 5,060,693 | 6,983,004
Troubled debt restructures | 2,202,268 | 4,108,209 | 2,844,177
Number of TDRs accounts | 2 | 3 | 2
Number of TDR accounts | 2 | 1 |
Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 239,697,588 | 219,511,940 | 219,829,703
Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 8,829,428 | 7,721,303 | 3,681,469
Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 5,405,784 | 10,415,413 | 10,649,799
Doubtful |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 89,892 | 74,824 | 124,725
Loss |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 0 | 0 | 0
Non-performing TDRs |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross |  | 2,818,295 |
Troubled debt restructures | 2,202,268 |  | 2,844,177
Commercial and Industrial |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 4,901,107 | 7,193,074 | 7,193,070
Non-accrual | 17,286 | 20,286 | 1,359,554
Troubled debt restructures | 0 | 9,491 | 35,711
Number of TDRs accounts | 0 | 1 | 1
Number of TDR accounts | 0 | 0 |
Commercial and Industrial | Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 4,296,139 | 5,882,615 | 5,852,779
Commercial and Industrial | Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 183,507 | 327,048 | 642,248
Commercial and Industrial | Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 421,461 | 983,411 | 698,043
Commercial and Industrial | Doubtful |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 0 | 0 | 0
Commercial and Industrial | Loss |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 0 | 0 | 0
Commercial and Industrial | Non-performing TDRs |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross |  | 0 |
Troubled debt restructures | 0 |  |
Commercial Real Estate |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 72,879,104 | 71,073,894 | 76,449,631
Non-accrual | 2,645,320 | 4,484,260 | 4,522,246
Troubled debt restructures | 1,369,768 | 2,818,295 | 2,808,466
Number of TDRs accounts | 1 | 1 | 1
Number of TDR accounts | 1 | 1 |
Commercial Real Estate | Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 63,297,427 | 58,798,799 | 66,763,903
Commercial Real Estate | Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 5,970,942 | 4,736,458 | 686,338
Commercial Real Estate | Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 3,610,735 | 7,538,637 | 8,999,390
Commercial Real Estate | Doubtful |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 0 | 0 | 0
Commercial Real Estate | Loss |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 0 | 0 | 0
Commercial Real Estate | Non-performing TDRs |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross |  | 2,818,295 |
Troubled debt restructures | 1,369,768 |  |
Consumer and Indirect |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 66,096,285 | 50,118,030 | 46,860,351
Non-accrual | 237,193 | 74,824 | 124,925
Troubled debt restructures | 0 | 0 | 0
Number of TDRs accounts | 0 | 0 | 0
Number of TDR accounts | 0 | 0 |
Consumer and Indirect | Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 64,160,355 | 48,528,582 | 44,931,931
Consumer and Indirect | Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 1,485,366 | 1,324,580 | 1,543,756
Consumer and Indirect | Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 360,672 | 190,044 | 259,939
Consumer and Indirect | Doubtful |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 89,892 | 74,824 | 124,725
Consumer and Indirect | Loss |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 0 | 0 | 0
Consumer and Indirect | Non-performing TDRs |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross |  | 0 |
Troubled debt restructures | 0 |  |
Residential Real Estate |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 110,146,196 | 109,338,482 | 103,782,644
Non-accrual | 1,108,866 | 481,323 | 976,279
Troubled debt restructures | 832,500 | 1,280,423 | 0
Number of TDRs accounts | 1 | 1 | 0
Number of TDR accounts | 1 | 0 |
Residential Real Estate | Pass |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 107,943,667 | 106,301,944 | 102,281,090
Residential Real Estate | Special mention |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 1,189,613 | 1,333,217 | 809,127
Residential Real Estate | Substandard |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 1,012,916 | 1,703,321 | 692,427
Residential Real Estate | Doubtful |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 0 | 0 | 0
Residential Real Estate | Loss |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross | 0 | 0 | 0
Residential Real Estate | Non-performing TDRs |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and leases receivable, gross |  | 0 |
Troubled debt restructures | $ 832,500 |  |

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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6951948&loc=d3e18845-111554 + 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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