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Contingent Liabilities (Narrative) (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
Aug. 01, 2009
Sep. 30, 2013
item
Dec. 31, 2005
item
Dec. 31, 2015
USD ($)
item
Dec. 31, 2014
USD ($)
Contingent Liabilities [Line Items]          
Total expense | $       $ 1,937  
Rental expense | $       $ 528 $ 542
Banking Facility [Member]          
Contingent Liabilities [Line Items]          
Number of leases       4  
Mortgage Production Office [Member]          
Contingent Liabilities [Line Items]          
Number of leases       1  
Commercial Loan Production Office [Member]          
Contingent Liabilities [Line Items]          
Number of leases       1  
615 Church Street [Member]          
Contingent Liabilities [Line Items]          
Period of lease 10 years        
Remaining period on lease (in years) 3 years 6 months        
828 Main Street [Member]          
Contingent Liabilities [Line Items]          
Period of lease       10 years  
Number of renewals       2  
Period of renewal (in years)       5 years  
Period of lease after of renewal options (in years)       20 years  
Remaining period on lease (in years)       8 years 6 months  
Total expense | $       $ 4,277  
828 Main Street [Member] | Board Member [Member]          
Contingent Liabilities [Line Items]          
Ownership interest in LLC       100.00%  
4935 Boonsboro Road [Member]          
Contingent Liabilities [Line Items]          
Period of lease     5 years    
Number of renewals     2    
Period of renewal (in years)     5 years    
Period of lease after of renewal options (in years)     15 years    
Remaining period on lease (in years)     5 years    
1430 Rolkin Court [Member]          
Contingent Liabilities [Line Items]          
Period of lease   5 years      
Number of renewals   1      
Period of renewal (in years)   5 years      
Period of lease after of renewal options (in years)   10 years      
Remaining period on lease (in years)   8 years      
Number of option periods   1