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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
Dec. 31, 2013
Dec. 31, 2012
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 $ 56,060 $ 63,253
Tier 1 Capital (to Risk Weighted Assets), Actual Amount 51,027 58,186
Tier 1 Capital (to Average Assets), Actual Amount 51,027 58,186
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount 43,300 49,447
Total Capital (to Risk Weighted Assets), Actual Ratio 13.95% 15.64%
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount 21,650 24,724
Tier 1 Capital (to Risk Weighted Assets), Actual Ratio 12.70% 14.39%
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Amount 21,888 24,948
Tier 1 Capital (to Average Assets), Actual Ratio 9.33% 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 55,758 61,908
Tier 1 Capital (to Risk Weighted Assets), Actual Amount 50,730 56,840
Tier 1 Capital (to Average Assets), Actual Amount 50,730 56,840
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount 43,270 49,447
Total Capital (to Risk Weighted Assets), Actual Ratio 13.86% 15.31%
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount 21,635 24,723
Tier 1 Capital (to Risk Weighted Assets), Actual Ratio 12.61% 14.05%
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Amount 21,872 24,952
Tier 1 Capital (to Average Assets), Actual Ratio 9.28% 9.11%
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount 54,087 61,808
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 32,452 37,085
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 $ 27,340 $ 31,190
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%