Loans and Leases - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable Net of Deferred Income, Acquired	$ 456,473	$ 538,780
Carrying amount	998	1,583
Nonaccrual Loans and Leases	30,148	14,517
Other accruing impaired loans	3,300	4,100
Specific reserves for other accruing impaired loans	25	99
Impaired loans with no related reserve, Recorded Investment	16,953	27,454
Impaired Financing Receivable, Related Reserve	$ 1,524	131
Maximum modification period on short-term basis	1 year
Restructured loan past due period	90 days
Lease Financings [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable Net of Deferred Income, Acquired	$ 0	0
Nonaccrual Loans and Leases	1,526	1,599
Impaired loans with no related reserve, Recorded Investment	1,300	1,300
Impaired Financing Receivable, Related Reserve	0	$ 0
Fox Chase Bank [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable Net of Deferred Income, Acquired	368,600
Carrying amount	332
Valley Green Bank [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable Net of Deferred Income, Acquired	87,900
Carrying amount	666
Minimum [Member]
Financing Receivable, Recorded Investment [Line Items]
Amount of Loan Relationship Balance, Loans Reviewed Annually	1,000
Amount of Loan Relationship Balance, Reviewed Quarterly	15,000
Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Amount of Loan Relationship Balance, Loans Reviewed on a Performance Basis	$ 1,000