Loans and Leases (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Acquired Loans and Leases
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Outstanding principal balance $ 7,833 $ 2,335
Carrying amount 4,733 2,335
VIST Financial Corp. ("VIST Financial") | Acquired Credit Impaired Loans
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Outstanding principal balance 70,727 114,516
Carrying amount 46,809 80,223
VIST Financial Corp. ("VIST Financial") | Acquired Non Credit Impaired Loans
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Outstanding principal balance 666,089 750,380
Carrying amount 620,231 741,281
VIST Financial Corp. ("VIST Financial") | Acquired Loans and Leases
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Outstanding principal balance 736,816 864,896
Carrying amount $ 667,040 $ 821,504