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Investment in Securities (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Investment in Securities [Abstract]      
Number of securities that had an unrealized loss 56   102
Percentage of total securities 17.00%   31.00%
Proceeds from sales of securities available-for-sale    $ 28,021 $ 28,021
Gross realized gains      1,453
Securities pledged as collateral $ 3,750