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Assets Measured at Fair Value on Recurring and Nonrecurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale $ 107,254 $ 108,762
Agency mortgage-backed securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 28,105 18,369
Agency CMO
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 17,562 20,241
Agency notes and bonds
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 25,179 30,914
Municipal obligations
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 34,048 36,040
Mutual fund investment
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 2,360 3,198
Fair Value, Measurements, Recurring
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 107,254 108,762
Fair Value, Measurements, Recurring | Agency mortgage-backed securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 28,105 18,369
Fair Value, Measurements, Recurring | Agency CMO
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 17,562 20,241
Fair Value, Measurements, Recurring | Agency notes and bonds
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 25,179 30,914
Fair Value, Measurements, Recurring | Municipal obligations
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 34,048 36,040
Fair Value, Measurements, Recurring | Mutual fund investment
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 2,360 3,198
Fair Value, Measurements, Nonrecurring
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 4,796 5,391
Loans held for sale 3,824 1,611
Foreclosed real estate 49 466
Fair Value, Measurements, Nonrecurring | Residential
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 1,385 1,928
Foreclosed real estate 49 466
Fair Value, Measurements, Nonrecurring | Land
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 113 120
Fair Value, Measurements, Nonrecurring | Construction
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Fair Value, Measurements, Nonrecurring | Commercial Real Estate
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 2,564 2,441
Fair Value, Measurements, Nonrecurring | Real Estate Construction
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 638 639
Fair Value, Measurements, Nonrecurring | Home Equity and Second Mortgage
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 96 263
Level 1
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 2,360 3,198
Loans held for sale 0 0
Level 1 | Fair Value, Measurements, Recurring
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 2,360 3,198
Level 1 | Fair Value, Measurements, Recurring | Agency mortgage-backed securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 1 | Fair Value, Measurements, Recurring | Agency CMO
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 1 | Fair Value, Measurements, Recurring | Agency notes and bonds
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 1 | Fair Value, Measurements, Recurring | Municipal obligations
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 1 | Fair Value, Measurements, Recurring | Mutual fund investment
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 2,360 3,198
Level 1 | Fair Value, Measurements, Nonrecurring
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Loans held for sale 0 0
Foreclosed real estate 0 0
Level 1 | Fair Value, Measurements, Nonrecurring | Residential
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Foreclosed real estate 0 0
Level 1 | Fair Value, Measurements, Nonrecurring | Land
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Level 1 | Fair Value, Measurements, Nonrecurring | Construction
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Level 1 | Fair Value, Measurements, Nonrecurring | Commercial Real Estate
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Level 1 | Fair Value, Measurements, Nonrecurring | Real Estate Construction
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Level 1 | Fair Value, Measurements, Nonrecurring | Home Equity and Second Mortgage
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Level 2
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 104,894 105,564
Loans held for sale 3,912 1,644
Level 2 | Fair Value, Measurements, Recurring
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 104,894 105,564
Level 2 | Fair Value, Measurements, Recurring | Agency mortgage-backed securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 28,105 18,369
Level 2 | Fair Value, Measurements, Recurring | Agency CMO
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 17,562 20,241
Level 2 | Fair Value, Measurements, Recurring | Agency notes and bonds
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 25,179 30,914
Level 2 | Fair Value, Measurements, Recurring | Municipal obligations
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 34,048 36,040
Level 2 | Fair Value, Measurements, Recurring | Mutual fund investment
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 2 | Fair Value, Measurements, Nonrecurring
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Loans held for sale 3,824 1,611
Foreclosed real estate 0 0
Level 2 | Fair Value, Measurements, Nonrecurring | Residential
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Foreclosed real estate 0 0
Level 2 | Fair Value, Measurements, Nonrecurring | Land
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Level 2 | Fair Value, Measurements, Nonrecurring | Construction
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Level 2 | Fair Value, Measurements, Nonrecurring | Commercial Real Estate
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Level 2 | Fair Value, Measurements, Nonrecurring | Real Estate Construction
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Level 2 | Fair Value, Measurements, Nonrecurring | Home Equity and Second Mortgage
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Level 3
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Loans held for sale 0 0
Level 3 | Fair Value, Measurements, Recurring
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 3 | Fair Value, Measurements, Recurring | Agency mortgage-backed securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 3 | Fair Value, Measurements, Recurring | Agency CMO
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 3 | Fair Value, Measurements, Recurring | Agency notes and bonds
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 3 | Fair Value, Measurements, Recurring | Municipal obligations
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 3 | Fair Value, Measurements, Recurring | Mutual fund investment
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Level 3 | Fair Value, Measurements, Nonrecurring
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 4,796 5,391
Loans held for sale 0 0
Foreclosed real estate 49 466
Level 3 | Fair Value, Measurements, Nonrecurring | Residential
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 1,385 1,928
Foreclosed real estate 49 466
Level 3 | Fair Value, Measurements, Nonrecurring | Land
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 113 120
Level 3 | Fair Value, Measurements, Nonrecurring | Construction
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Level 3 | Fair Value, Measurements, Nonrecurring | Commercial Real Estate
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 2,564 2,441
Level 3 | Fair Value, Measurements, Nonrecurring | Real Estate Construction
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 638 639
Level 3 | Fair Value, Measurements, Nonrecurring | Home Equity and Second Mortgage
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans $ 96 $ 263