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Loans and Related Allowance for Loan Losses (Allowance for Loan Losses Summarized by Loan Portfolio Segments) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]    
ALL Beginning Balance $ 9,918 $ 11,922
Charge-offs (712) (438)
Recoveries 1,768 204
Provision for loan losses 609 568
ALL Ending Balance 11,583 12,256
Commercial Real Estate [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
ALL Beginning Balance 3,913 2,580
Charge-offs (429) (211)
Recoveries 5 0
Provision for loan losses 2,078 931
ALL Ending Balance 5,567 3,300
Acquisition and Development [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
ALL Beginning Balance 871 4,129
Charge-offs (18) 0
Recoveries 11 100
Provision for loan losses 19 (482)
ALL Ending Balance 883 3,747
Commercial and industrial [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
ALL Beginning Balance 858 722
Charge-offs (33) (53)
Recoveries 1,455 30
Provision for loan losses (1,344) 59
ALL Ending Balance 936 758
Residential Mortgage [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
ALL Beginning Balance 3,588 3,785
Charge-offs (148) (90)
Recoveries 220 32
Provision for loan losses (158) 32
ALL Ending Balance 3,502 3,759
Consumer [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
ALL Beginning Balance 188 206
Charge-offs (84) (84)
Recoveries 77 42
Provision for loan losses 14 28
ALL Ending Balance 195 192
Unallocated [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
ALL Beginning Balance 500 500
Charge-offs 0 0
Recoveries 0 0
Provision for loan losses 0 0
ALL Ending Balance $ 500 $ 500