XML 44 R62.htm IDEA: XBRL DOCUMENT v2.4.0.6
Short Term Borrowings - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Short-term Debt [Line Items]      
Federal home loan bank shares owned 14,480    
Percentage of investment to be maintained on total assets 0.20%    
Additional percentage of investment to be maintained on total advances 4.50%    
Percentage of credit available on total assets 20.00%    
Amount Of Credit Available On Total Assets $ 54,692,000    
Long-term federal home loan bank advances 20,000,000 20,000,000 20,000,000
Average short-term borrowings 399,000 811,000 307,000
Unsecured Line Of Credit
      
Short-term Debt [Line Items]      
Line of credit, amount available for borrowing 3,000,000 3,000,000 3,000,000
Federal Funds
      
Short-term Debt [Line Items]      
Line of credit, amount available for borrowing $ 5,000,000