Loans and Leases - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable Net of Deferred Income, Acquired	$ 690,903,000	$ 895,054,000
Carrying amount	6,616,000	7,352,000
Nonaccrual Loans and Leases	19,856,000	17,916,000
Other accruing impaired loans	20,300,000	23,300,000
Specific reserves for other accruing impaired loans	650,000	84,000
Impaired Financing Receivable, Recorded Investment	37,414,000
Impaired Financing Receivable, Related Allowance	$ 399,000	235,000
Maximum modification period on short-term basis	up to one year
Restructured loan past due period	less than ninety days past due
Software Lease [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual Loans and Leases	$ 5,000,000
Lease Financings [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable Net of Deferred Income, Acquired	0	0
Nonaccrual Loans and Leases	5,561,000	536,000
Impaired Financing Receivable, Recorded Investment	5,000,000	$ 0
Impaired Financing Receivable, Related Allowance	580,000
Fox Chase Bank [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable Net of Deferred Income, Acquired	535,700,000
Carrying amount	5,800,000
Valley Green Bank [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable Net of Deferred Income, Acquired	155,200,000
Carrying amount	$ 788,000