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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 |

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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 + Details
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