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Loans and Leases (Interest Income on Non-accrual Loans) (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Loans and Leases [Abstract]      
Non-accrual loans $ 15,500,000   $ 9,600,000
Loans 90 day past due and still accruing 827,000   869,000
Interest income which would have been recorded under original terms 213,000 91,000  
Net impact on interest income $ 213,000 $ 91,000