Acquisition of New Jersey Community Bank (Narrative) (Details) - USD ($)		3 Months Ended		6 Months Ended
	Apr. 11, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Business Acquisition [Line Items]
Estimated future credit losses		$ 39,000	$ 0	$ 40,000	$ 101,000
Acquisition related expenses		1,977,000	0	2,141,000	0
Income tax benefit		714,000	$ 841,000	1,555,000	$ 1,693,000
New Jersey Community Bank [Member]
Business Acquisition [Line Items]
Consideration transfered	$ 8,564,000
Number of shares issued (in shares)	249,785
Equity interest issued	$ 5,495,000
Cash payment to acquire business	3,100,000
Consideration transferred, cash paid to escrow	401,000
Loans acquired with no credit quality deterioration	75,144,000
Core deposit	80,000
Goodwill acquired during acquisition	0
Acquisition related expenses		$ 2,000,000		2,100,000
Income tax benefit				$ (568,000)
Core Deposits [Member] | New Jersey Community Bank [Member]
Business Acquisition [Line Items]
Core deposit	$ 80,000
Weighted average useful life	10 years
Financial Asset Acquired and No Credit Deterioration [Member] | New Jersey Community Bank [Member]
Business Acquisition [Line Items]
Loans acquired with no credit quality deterioration	$ 74,263,000
Financial Asset Acquired with Credit Deterioration [Member] | New Jersey Community Bank [Member]
Business Acquisition [Line Items]
Loans acquired with no credit quality deterioration	881,000
Estimated future credit losses	$ 1,600,000