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Loans (Narrative) (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Mar. 31, 2014
Bank Acquisitions [Member]
Mar. 31, 2013
Bank Acquisitions [Member]
Schedule Of Accretable Yield Activity Related to Loans Acquired With Evidence Of Credit Quality Deterioration Since Origination Table [Text Block] [Line Items]          
Certain Loans Acquired Accretable Yield Amortized To Interest Income       $ 7,770,000 $ 9,577,000
Deferred Discounts, Finance Charges and Interest Included in Receivables 40,300,000 41,900,000 40,000,000    
Loans and Leases Receivable, Deferred Income $ (6,200,000) $ (9,200,000) $ 10,500,000