Loans and Leases (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Acquired Loans and Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	$ 12,960	$ 7,833
Carrying amount	9,220	4,733
VIST Financial Corp. ("VIST Financial") [Member] | Acquired Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	57,121	59,979
Carrying amount	43,194	46,809
VIST Financial Corp. ("VIST Financial") [Member] | Acquired Non Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	615,510	230,600
Carrying amount	605,496	620,231
VIST Financial Corp. ("VIST Financial") [Member] | Acquired Loans and Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	672,631	736,816
Carrying amount	$ 648,690	$ 667,040