Loans and Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable Net of Deferred Income, Acquired	$ 352,552		$ 377,376
Carrying amount	693		695
Impaired loans with no related reserve, Recorded Investment	$ 11,848		13,174
Maximum modification period on short-term basis	1 year
Restructured loan past due period	90 days
Receivable related to an operating lease contract	$ 7		0
Interest income on lease financing	2,000	$ 1,800
Lease Financings [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable Net of Deferred Income, Acquired	0		0
Impaired loans with no related reserve, Recorded Investment	0		$ 0
Fox Chase Bank [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable Net of Deferred Income, Acquired	301,300
Carrying amount	62
Valley Green Bank [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable Net of Deferred Income, Acquired	51,300
Carrying amount	631
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