Loans and Leases - Risk Category of Loans by Class of Loan Based on Most Recent Analysis (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Commercial and Other Loans, Gross	$ 17,150	$ 15,603
Commercial Real Estate, Gross	44,716	50,150
Construction and Land Development	626	969
Total Loans	62,492	66,722
Recorded Investment in Loan, risk analysis, Current	61,452	63,542
Recorded Investment in Loan, risk analysis, Past Due 30-59 days	94	65
Recorded Investment in Loan, risk analysis, Past Due 60-89 days
Recorded Investment in Loan, risk analysis, Past Due 90 days or more
Recorded Investment in Loan, risk analysis, Non-accrual	946	3,115
Total Loans	62,492	66,722
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial and Other Loans, Gross	17,114	15,572
Commercial Real Estate, Gross	35,324	39,873
Construction and Land Development	305	969
Total Loans	52,743	56,414
Recorded Investment in Loan, risk analysis, Current	52,743	56,349
Recorded Investment in Loan, risk analysis, Past Due 30-59 days		65
Recorded Investment in Loan, risk analysis, Past Due 60-89 days
Recorded Investment in Loan, risk analysis, Past Due 90 days or more
Recorded Investment in Loan, risk analysis, Non-accrual
Total Loans	52,743	56,414
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial and Other Loans, Gross
Commercial Real Estate, Gross	4,418	3,465
Construction and Land Development
Total Loans	4,418	3,465
Recorded Investment in Loan, risk analysis, Current	4,418	3,465
Recorded Investment in Loan, risk analysis, Past Due 30-59 days
Recorded Investment in Loan, risk analysis, Past Due 60-89 days
Recorded Investment in Loan, risk analysis, Past Due 90 days or more
Recorded Investment in Loan, risk analysis, Non-accrual
Total Loans	4,418	3,465
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial and Other Loans, Gross	36	31
Commercial Real Estate, Gross	4,974	6,812
Construction and Land Development	321
Total Loans	5,331	6,843
Recorded Investment in Loan, risk analysis, Current	4,291	3,728
Recorded Investment in Loan, risk analysis, Past Due 30-59 days	94
Recorded Investment in Loan, risk analysis, Past Due 60-89 days
Recorded Investment in Loan, risk analysis, Past Due 90 days or more
Recorded Investment in Loan, risk analysis, Non-accrual	946	3,115
Total Loans	5,331	6,843
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial and Other Loans, Gross
Commercial Real Estate, Gross
Construction and Land Development
Total Loans
Recorded Investment in Loan, risk analysis, Current
Recorded Investment in Loan, risk analysis, Past Due 30-59 days
Recorded Investment in Loan, risk analysis, Past Due 60-89 days
Recorded Investment in Loan, risk analysis, Past Due 90 days or more
Recorded Investment in Loan, risk analysis, Non-accrual
Total Loans

Financing receivable risk analysis recorded investment in current.

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- Definition

Financing receivable risk analysis recorded investment in equal to greater than ninety days past due.

+ References

No definition available.

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- Definition

Financing receivable risk analysis recorded investment in nonaccrual status.

+ References

No definition available.

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- Definition

Financing receivable risk analysis recorded investment in sixty to eighty nine days past due.

+ References

No definition available.

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- Definition

Financing receivable risk analysis recorded investment in thirty to fifty nine days past due.

+ References

No definition available.

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- Definition

Loans and leases receivable gross carrying amount commercial and other loans.

+ References

No definition available.

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- Definition

Loans receivable gross carrying amount construction and land development.

+ References

No definition available.

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- Definition

Amount before allowance of commercial loans and leases receivable includes, but not limited to, commercial and industrial loans, agricultural loans, mortgage loans, promissory notes, interbank and other loans to financial institutions, draws against credit facilities, trade financing, lease financings. 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=28367877&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph a, b

-Article 9

Reference 3: 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(a),(b))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

Amount before allowance of commercial loans issued to businesses to acquire, develop, construct, improve, or refinance land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans 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 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5066-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph a

-Article 9

Reference 3: 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(a))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.1(c))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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