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Loans and Asset Quality Information (Schedule of Nonaccrual Loans) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Company's nonaccrual loans:    
Nonaccrual loans $ 22,575 $ 20,968
Commercial, financial, and agricultural [Member]    
Company's nonaccrual loans:    
Nonaccrual loans 919 1,001
Real estate - construction, land development & other land loans    
Company's nonaccrual loans:    
Nonaccrual loans 2,265 1,822
Real estate residential, farmland and mutli-family [Member]    
Company's nonaccrual loans:    
Nonaccrual loans 10,115 12,201
Real estate home equity lines of credit [Member]    
Company's nonaccrual loans:    
Nonaccrual loans 1,685 2,524
Real estate - mortgage - commercial and other [Member]    
Company's nonaccrual loans:    
Nonaccrual loans 7,452 3,345
Non-covered loans to Individual    
Company's nonaccrual loans:    
Nonaccrual loans 139 75
Covered [Member]    
Company's nonaccrual loans:    
Nonaccrual loans $ 22,575 $ 20,968