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Loans And Related Allowances For Loan Losses (Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment $ 2,634 $ 869
Impaired Loans with Specific Allowance: Related Allowance 362 260
Impaired Loans with No Specific Allowance: Recorded Investment 12,317 23,131
Total Impaired Loans: Recorded Investment 14,951 24,000
Unpaid Principal Balance 24,983 30,191
Commercial real estate- non owner-occupied [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment 1,711 131
Impaired Loans with Specific Allowance: Related Allowance 245 23
Impaired Loans with No Specific Allowance: Recorded Investment 1,907 6,635
Total Impaired Loans: Recorded Investment 3,618 6,766
Unpaid Principal Balance 10,579 9,372
Commercial real estate- all other CRE [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment 0 432
Impaired Loans with Specific Allowance: Related Allowance 0 154
Impaired Loans with No Specific Allowance: Recorded Investment 5,458 10,012
Total Impaired Loans: Recorded Investment 5,458 10,444
Unpaid Principal Balance 5,731 11,057
Acquisition and development- 1-4 family residential construction [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment 0 0
Impaired Loans with Specific Allowance: Related Allowance 0 0
Impaired Loans with No Specific Allowance: Recorded Investment 527 582
Total Impaired Loans: Recorded Investment 527 582
Unpaid Principal Balance 527 628
Acquisition and development- All other A&D [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment 295 245
Impaired Loans with Specific Allowance: Related Allowance 40 40
Impaired Loans with No Specific Allowance: Recorded Investment 154 1,698
Total Impaired Loans: Recorded Investment 449 1,943
Unpaid Principal Balance 722 2,213
Commercial and industrial [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment 0 0
Impaired Loans with Specific Allowance: Related Allowance 0 0
Impaired Loans with No Specific Allowance: Recorded Investment 668 290
Total Impaired Loans: Recorded Investment 668 290
Unpaid Principal Balance 2,882 2,504
Residential mortgage- term [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment 598 61
Impaired Loans with Specific Allowance: Related Allowance 65 43
Impaired Loans with No Specific Allowance: Recorded Investment 3,023 3,763
Total Impaired Loans: Recorded Investment 3,621 3,824
Unpaid Principal Balance 3,919 4,249
Residential mortgage- home equity [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment 0 0
Impaired Loans with Specific Allowance: Related Allowance 0 0
Impaired Loans with No Specific Allowance: Recorded Investment 580 151
Total Impaired Loans: Recorded Investment 580 151
Unpaid Principal Balance 593 168
Consumer [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment 30 0
Impaired Loans with Specific Allowance: Related Allowance 12 0
Impaired Loans with No Specific Allowance: Recorded Investment 0 0
Total Impaired Loans: Recorded Investment 30 0
Unpaid Principal Balance $ 30 $ 0