Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) loan item	Dec. 31, 2014 USD ($) loan	Dec. 31, 2013	Dec. 31, 2012
Summary Of Significant Accounting Policies [Line Items]
Number of community offices, providing investment and trust services | item	12
Impairment charges	$ 0	$ 0
Collection of the original recorded investment on HTM securities (percentage)	85.00%
Restricted stock	$ 3,447	2,587
Accrual of interest general discontinued period, in days	90 days
General charge-off period, in days	120 days
Aggregate liquidation preference	$ 13,000
Number of additional directors that may be elected | item	2
Partial charge-off of loan amount	$ 1,154	975
Reserve for unfunded loan commitments	188	166
Real estate loans in the process of foreclosure	1,000
Unrecognized tax positions	$ 0
Age of eligibility for noncontributory defined benefit pension plan	21 years
Defined Benefit pension plan requisite service period, in years	1 year
Highest consecutive years of average-compensation (years)	5 years
Defined benefit pension plan, years of service	10 years
Advertising and marketing	$ 631	$ 662
Commercial Mortgage [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of TDR loans | loan	0	1
TDR amount		$ 2,246
Reduction of principal loan amount	$ 0
Pre-modification recorded investment	2,272
Post-modification recorded investment	2,272
Loan defaults	$ 0	$ 0
Consumer: Other [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of TDR loans | loan	1	1
TDR amount	$ 102	$ 102
Loan Payment Period	36 months
Reduction of principal loan amount	$ 0
Pre-modification recorded investment	102
Post-modification recorded investment	102
Loan defaults	$ 0	$ 0
Consumer Installment Loan [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of TDR loans | loan	1	0
TDR amount	$ 40
Pre-modification recorded investment	42
Post-modification recorded investment	42
Partial charge-off of loan amount	2
Loan defaults	0
Investment in Federal Home Loan Bank Stock [Member]
Summary Of Significant Accounting Policies [Line Items]
Restricted stock	2,300	$ 1,400
Federal Reserve Bank Of Philadelphia [Member]
Summary Of Significant Accounting Policies [Line Items]
Restricted stock	1,100	1,100
Atlantic Central Bankers Bank [Member]
Summary Of Significant Accounting Policies [Line Items]
Restricted stock	$ 106	$ 106
Series 2011A Preferred Stock [Member]
Summary Of Significant Accounting Policies [Line Items]
Preferred Stock, Dividend Rate, Percentage			1.00%	1.00%
Qualified Small Business Lending [Member]
Summary Of Significant Accounting Policies [Line Items]
Preferred Stock, Dividend Rate, Percentage	3.874%
QSBL, 2nd Period [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Preferred Stock, Dividend Rate, Percentage	5.00%
QSBL, 2nd Period [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Preferred Stock, Dividend Rate, Percentage	1.00%
QSBL, 3rd Period [Member]
Summary Of Significant Accounting Policies [Line Items]
Preferred stock, period of unchanged rate, in years	4 years 6 months
QSBL, 3rd Period [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Preferred Stock, Dividend Rate, Percentage	7.00%
QSBL, 3rd Period [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Preferred Stock, Dividend Rate, Percentage	1.00%
QSBL, 4rd Period [Member]
Summary Of Significant Accounting Policies [Line Items]
Preferred Stock, Dividend Rate, Percentage	9.00%