Loans and Leases (Details 1) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Total Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	$ 3,191	$ 6,308
Carrying amount	3,070	5,625
VIST Financial Corp. (VIST Financial) | Acquired Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	21,525	26,237
Carrying amount	16,597	22,517
VIST Financial Corp. (VIST Financial) | Acquired Non-Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	333,608	375,471
Carrying amount	331,244	371,594
VIST Financial Corp. (VIST Financial) | Total Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	355,133	401,708
Carrying amount	$ 347,841	$ 394,111