Loans - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net unamortized loan costs and fees	$ 911	$ 232
Percentage of comprised loan, commercial, industrial and agricultural loans	23.00%	28.00%
Percentage of comprised loan, commercial mortgage loans	37.00%	29.00%
Risk rating to commercial loans	250,000
Percentage of loan-to-value to business equipment	80.00%
Percentage of loan-to-value to accounts receivable	75.00%
Percentage of loan-to-value to business inventory	60.00%
Percentage of loan-to-value to real estate	85.00%
Percentage of residential real estate loan in portfolio	37.00%	38.00%
Additional provision for loan losses	514	101
Minimum period to be considered for loan to have defaulted	90 days
Principal balances forgiven in connection with loan restructuring	0	0
Troubled debt restructuring charged off		0
Impaired commercial mortgage loan placed on non-accrual status, modified as TDRs	12,136	11,621
Resulting in an increase in the allowance for loan losses		503
Outstanding balance of semi annual loans	Greater than $1 million
Outstanding balance of annual loans	Less than $1 million
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum percentage of consumer loan and credit card in portfolio	10.00%	10.00%
Reduction in stated interest rate modification having loan range period	15 years
Extension of maturity date modification having loan range period	18 years
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reduction in stated interest rate modification having loan range period	4 years
Extension of maturity date modification having loan range period	4 years
Commercial Mortgage Loan One [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additional provision for loan losses	262
Troubled debt restructuring charged off	974
Commercial mortgage loan balance amount	1,086	1,660
Commercial Mortgage Loan Two [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additional provision for loan losses	615
Commercial Mortgage Loan Three [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additional provision for loan losses	514
Impaired commercial mortgage loan placed on non-accrual status, modified as TDRs	$ 3,269

Additional provision for loan losses.

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- Definition

Commercial industrial and agricultural loan amount as maximum percentage of accounts receivable.

+ References

No definition available.

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- Definition

Commercial industrial and agricultural loan amount as maximum percentage of business equipment.

+ References

No definition available.

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- Definition

Commercial industrial and agricultural loan amount as maximum percentage of business inventory.

+ References

No definition available.

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- Definition

Commercial mortgage loan amount as maximum percentage of appraised real estate value.

+ References

No definition available.

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- Definition

Minimum period to be considered for loan to have defaulted.

+ References

No definition available.

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- Definition

Minimum risk rating category of commercial loans.

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- Definition

Modification involving extension of maturity date having loan period.

+ References

No definition available.

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Modification involving reduction of stated interest rate having loan period.

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- Definition

Outstanding balance of annual loans.

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Outstanding balance of semi annual loans.

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Percentage of commercial industrial and agricultural loans in loan portfolio.

+ References

No definition available.

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- Definition

Percentage of commercial mortgage loans in loan portfolio.

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No definition available.

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- Definition

Percentage of consumer loans and credit card products in loan portfolio.

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- Definition

Percentage of residential real estate loans in loan portfolio.

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- Definition

Troubled debt restructuring loan principal balance forgiven.

+ References

No definition available.

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- Definition

Amount of increase (decrease) of allowance reserve for credit loss.

+ References

Reference 1: 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=28368275&loc=d3e5212-111524

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-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

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph d

-Article 9

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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

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- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 34

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953682-111524

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- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

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- Definition

Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for 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 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533

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