Loans And Allowance For Loan Losses (Troubled Debt Restructurings) (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) Contract	Dec. 31, 2017 USD ($) Contract	Dec. 31, 2016 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	217	151	169
Total loans	$ 49,827,000	$ 36,723,000	$ 52,994,000
Write-down	$ 403,000	$ 0	$ 0
Total commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	62	60	72
Total loans	$ 21,058,000	$ 23,319,000	$ 33,103,000
Total commercial and industrial | Commercial, financial, and agricultural
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	46	56	63
Total loans	$ 7,764,000	$ 21,579,000	$ 24,669,000
Total commercial and industrial | Owner-occupied
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	16	4	9
Total loans	$ 13,294,000	$ 1,740,000	$ 8,434,000
Total commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	40	42	57
Total loans	$ 16,758,000	$ 6,718,000	$ 16,429,000
Total commercial real estate | Investment properties
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	10	1	4
Total loans	$ 10,285,000	$ 121,000	$ 5,343,000
Total commercial real estate | 1-4 family properties
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	25	35	39
Total loans	$ 4,495,000	$ 4,826,000	$ 6,987,000
Total commercial real estate | Land and development
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	5	6	14
Total loans	$ 1,978,000	$ 1,771,000	$ 4,099,000
Total consumer
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	115	49	40
Total loans	$ 12,011,000	$ 6,686,000	$ 3,462,000
Total consumer | Consumer mortgages
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	19	11	7
Total loans	$ 5,683,000	$ 3,729,000	$ 464,000
Total consumer | Home equity lines
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	4		5
Total loans	$ 511,000		$ 348,000
Total consumer | Credit cards
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract			0
Total loans			$ 0
Total consumer | Other consumer loans
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	92	38	28
Total loans	$ 5,817,000	$ 2,957,000	$ 2,650,000
Below Market Interest Rate
Financing Receivable, Modifications [Line Items]
Total loans	29,665,000	16,575,000	33,749,000
Below Market Interest Rate | Total commercial and industrial
Financing Receivable, Modifications [Line Items]
Total loans	11,396,000	9,469,000	25,393,000
Below Market Interest Rate | Total commercial and industrial | Commercial, financial, and agricultural
Financing Receivable, Modifications [Line Items]
Total loans	3,807,000	9,434,000	17,509,000
Below Market Interest Rate | Total commercial and industrial | Owner-occupied
Financing Receivable, Modifications [Line Items]
Total loans	7,589,000	35,000	7,884,000
Below Market Interest Rate | Total commercial real estate
Financing Receivable, Modifications [Line Items]
Total loans	10,673,000	2,943,000	7,324,000
Below Market Interest Rate | Total commercial real estate | Investment properties
Financing Receivable, Modifications [Line Items]
Total loans	8,070,000	0	1,825,000
Below Market Interest Rate | Total commercial real estate | 1-4 family properties
Financing Receivable, Modifications [Line Items]
Total loans	2,481,000	2,786,000	5,499,000
Below Market Interest Rate | Total commercial real estate | Land and development
Financing Receivable, Modifications [Line Items]
Total loans	122,000	157,000	0
Below Market Interest Rate | Total consumer
Financing Receivable, Modifications [Line Items]
Total loans	7,596,000	4,163,000	1,032,000
Below Market Interest Rate | Total consumer | Consumer mortgages
Financing Receivable, Modifications [Line Items]
Total loans	5,590,000	2,539,000	413,000
Below Market Interest Rate | Total consumer | Home equity lines
Financing Receivable, Modifications [Line Items]
Total loans	172,000		225,000
Below Market Interest Rate | Total consumer | Credit cards
Financing Receivable, Modifications [Line Items]
Total loans			0
Below Market Interest Rate | Total consumer | Other consumer loans
Financing Receivable, Modifications [Line Items]
Total loans	1,834,000	1,624,000	394,000
Other Concessions
Financing Receivable, Modifications [Line Items]
Total loans	20,162,000	20,148,000	19,245,000
Other Concessions | Total commercial and industrial
Financing Receivable, Modifications [Line Items]
Total loans	9,662,000	13,850,000	7,710,000
Other Concessions | Total commercial and industrial | Commercial, financial, and agricultural
Financing Receivable, Modifications [Line Items]
Total loans	3,957,000	12,145,000	7,160,000
Other Concessions | Total commercial and industrial | Owner-occupied
Financing Receivable, Modifications [Line Items]
Total loans	5,705,000	1,705,000	550,000
Other Concessions | Total commercial real estate
Financing Receivable, Modifications [Line Items]
Total loans	6,085,000	3,775,000	9,105,000
Other Concessions | Total commercial real estate | Investment properties
Financing Receivable, Modifications [Line Items]
Total loans	2,215,000	121,000	3,518,000
Other Concessions | Total commercial real estate | 1-4 family properties
Financing Receivable, Modifications [Line Items]
Total loans	2,014,000	2,040,000	1,488,000
Other Concessions | Total commercial real estate | Land and development
Financing Receivable, Modifications [Line Items]
Total loans	1,856,000	1,614,000	4,099,000
Other Concessions | Total consumer
Financing Receivable, Modifications [Line Items]
Total loans	4,415,000	2,523,000	2,430,000
Other Concessions | Total consumer | Consumer mortgages
Financing Receivable, Modifications [Line Items]
Total loans	93,000	1,190,000	51,000
Other Concessions | Total consumer | Home equity lines
Financing Receivable, Modifications [Line Items]
Total loans	339,000		123,000
Other Concessions | Total consumer | Credit cards
Financing Receivable, Modifications [Line Items]
Total loans			0
Other Concessions | Total consumer | Other consumer loans
Financing Receivable, Modifications [Line Items]
Total loans	$ 3,983,000	$ 1,333,000	$ 2,256,000