Loans and Leases (Details 2) (VIST Financial Corp. ("VIST Financial") [Member], USD $)
In Thousands, unless otherwise specified
 9 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2013
VIST Financial Corp. ("VIST Financial") [Member]
    
Accretable discounts    
Balance, beginning $ 10,954 $ 7,337
Accretion (3,740) (8,896)
Disposals (loans paid in full) (250) (212)
Reclassifications to/from nonaccretable difference 1,873 [1] 7,933 [1]
Other changes in expected cash flows 0 [2] 4,792 [2]
Balance, ending $ 8,837 $ 10,954
[1] Results in increased interest income as a prospective yield adjustment over the remaining life of the loans, as well as increased interest income from loan sales, modification and prepayments.
[2] Represents changes in cash flows expected to be collected due to factors other than credit (e.g. changes in prepayment assumptions and/or changes in interest rates on variable rate loans).