XML 47 R23.htm IDEA: XBRL DOCUMENT v2.4.0.6
Investment Securities (Narrative) (Details) (USD $)
3 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Investment Securities [Abstract]      
Securities with unrealized losses 5    
Securities pledged $ 33,200,000 $ 32,100,000 $ 24,200,000
Percent of investment portfolio securities pledged 17.00% 14.00% 13.00%
Concentration risk reporting threshold 10.00% 10.00% 10.00%
Investment in Federal Home Loan Bank stock $ 2,003,000 $ 2,003,000 $ 2,003,000