Loans and Leases (Details 1) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Total Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	$ 3,805	$ 6,308
Carrying amount	3,293	5,625
VIST Financial Corp. (VIST Financial) | Acquired Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	24,247	26,237
Carrying amount	20,027	22,517
VIST Financial Corp. (VIST Financial) | Acquired Non-Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	358,985	375,471
Carrying amount	355,353	371,594
VIST Financial Corp. (VIST Financial) | Total Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	383,232	401,708
Carrying amount	$ 375,380	$ 394,111