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Loans (Activity in the Allowance for Loan Losses) (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Disclosure Loans Activity In Allowance For Loan Losses [Abstract]      
Beginning Balance $ 26,424 $ 26,836 $ 26,836
Provision for loan losses 1,511 1,661 3,536
Charge-offs, net (821) (1,428)  
Ending balance $ 27,114 $ 27,069 $ 26,424