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Investment in Securities (Narrative) (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Investment in Securities [Abstract]          
Number of securities that had an unrealized loss 30   30   102
Percentage of total securities 9.00%   9.00%   31.00%
Proceeds from sales of securities available-for-sale $ 587,000 $ 31,006,000 $ 587,000 $ 94,666,000  
Gross realized gains 23,000 866,000 23,000 4,003,000  
Securities pledged as collateral $ 3,750,000   $ 3,750,000