Loans and Leases (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Acquired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	$ 6,573	$ 2,380
Carrying amount	3,722	2,335
VIST Financial Corp. ("VIST Financial") | Acquired Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	107,633	114,516
Carrying amount	67,690	80,223
VIST Financial Corp. ("VIST Financial") | Acquired Non-Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	727,763	750,380
Carrying amount	678,261	741,281
VIST Financial Corp. ("VIST Financial") | Acquired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	835,396	864,896
Carrying amount	$ 745,951	$ 821,504