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Regulatory and Operational Matters - Company's and Bank's Actual Capital Amounts and Ratios (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier 1 Capital (to Average Assets), Actual Ratio 9.00%  
Parent Company [Member]
    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total Capital (to Risk Weighted Assets), Actual Amount $ 56,405 $ 56,060
Tier 1 Capital (to Risk Weighted Assets), Actual Amount 51,406 51,027
Tier 1 Capital (to Average Assets), Actual Amount 51,406 51,027
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount 31,952 32,153
Total Capital (to Risk Weighted Assets), Actual Ratio 14.12% 13.95%
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount 15,976 16,076
Tier 1 Capital (to Risk Weighted Assets), Actual Ratio 12.87% 12.70%
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Amount 21,507 21,888
Tier 1 Capital (to Average Assets), Actual Ratio 9.56% 9.33%
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount      
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio 8.00% 8.00%
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount      
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio 4.00% 4.00%
Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount      
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Ratio 4.00% 4.00%
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio      
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio      
Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio      
Bank [Member]
    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total Capital (to Risk Weighted Assets), Actual Amount 56,342 55,758
Tier 1 Capital (to Risk Weighted Assets), Actual Amount 51,349 50,730
Tier 1 Capital (to Average Assets), Actual Amount 51,349 50,730
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount 31,919 32,153
Total Capital (to Risk Weighted Assets), Actual Ratio 14.12% 13.86%
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount 15,959 16,076
Tier 1 Capital (to Risk Weighted Assets), Actual Ratio 12.87% 12.61%
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Amount 21,491 21,888
Tier 1 Capital (to Average Assets), Actual Ratio 9.56% 9.28%
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount 39,898 32,187
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio 8.00% 8.00%
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount 23,939 24,140
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio 4.00% 4.00%
Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount $ 26,864 $ 27,340
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Ratio 4.00% 4.00%
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio 10.00% 10.00%
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio 6.00% 6.00%
Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio 5.00% 5.00%