Loans, Allowance for Credit Losses, and Asset Quality Information (Schedule of Recorded Investment in Loans by Credit Quality Indicators) (Details) - USD ($)
$ in Thousands

Loans, Allowance for Credit Losses, and Asset Quality Information (Schedule of Recorded Investment in Loans by Credit Quality Indicators) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
2021	$ 1,156,539
2020	1,334,495
2019	597,858
2018	381,836
2017	296,387
Prior	575,556
Revolving	444,175
Total	4,786,846	$ 4,735,013	$ 4,776,911
Unamortized net deferred loan fees	(4,782)	(3,698)	(6,848)
Total loans	4,782,064	4,731,315	4,770,063
Commercial, financial, and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Total	704,096	782,549	723,053
Commercial, financial, and agricultural \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	704,096	782,412
Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	9,568
2020	25,485
2019	4,686
2018	2,410
2017	996
Prior	921
Revolving	9,862
Total	53,928	53,955	51,161
Consumer loans \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	53,928	53,917
Commercial, financial, and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
2021	196,042
2020	184,582
2019	100,730
2018	89,630
2017	18,658
Prior	25,022
Revolving	89,432
Total	704,096
Real estate – construction, land development & other land loans \| Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	211,359
2020	252,331
2019	55,020
2018	10,770
2017	13,060
Prior	10,948
Revolving	12,929
Total	566,417	570,672	648,590
Real estate – construction, land development & other land loans \| Real estate, commercial \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	566,417	570,522
Real estate – mortgage – residential (1-4 family) first mortgages \| Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	104,827
2020	214,535
2019	125,162
2018	86,882
2017	93,162
Prior	280,845
Revolving	8,905
Total	914,318	972,378	1,076,411
Real estate – mortgage – residential (1-4 family) first mortgages \| Real estate, mortgage \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	914,318	968,151
Real estate – mortgage – home equity loans / lines of credit \| Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,370
2020	535
2019	841
2018	1,379
2017	282
Prior	1,988
Revolving	279,200
Total	285,595	306,256	318,618
Real estate – mortgage – home equity loans / lines of credit \| Real estate, mortgage \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	285,595	306,156
Real estate – mortgage – commercial and other \| Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	633,373
2020	657,027
2019	311,419
2018	190,765
2017	170,229
Prior	255,832
Revolving	43,847
Total	2,262,492	2,049,203	$ 1,959,078
Real estate – mortgage – commercial and other \| Real estate, commercial \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	2,262,492	2,045,264
Purchased credit impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Total		8,591
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total		4,613,259
Pass \| Commercial, financial, and agricultural \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		762,091
Pass \| Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	9,564
2020	25,411
2019	4,660
2018	2,393
2017	987
Prior	861
Revolving	9,703
Total	53,579
Pass \| Consumer loans \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		53,488
Pass \| Commercial, financial, and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
2021	196,025
2020	183,879
2019	96,149
2018	78,898
2017	18,263
Prior	24,935
Revolving	88,325
Total	686,474
Pass \| Real estate – construction, land development & other land loans \| Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	211,053
2020	251,155
2019	50,615
2018	10,583
2017	12,887
Prior	10,797
Revolving	12,915
Total	560,005
Pass \| Real estate – construction, land development & other land loans \| Real estate, commercial \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		560,845
Pass \| Real estate – mortgage – residential (1-4 family) first mortgages \| Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	103,275
2020	213,061
2019	124,409
2018	85,317
2017	92,248
Prior	264,553
Revolving	7,931
Total	890,794
Pass \| Real estate – mortgage – residential (1-4 family) first mortgages \| Real estate, mortgage \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		943,455
Pass \| Real estate – mortgage – home equity loans / lines of credit \| Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,358
2020	424
2019	758
2018	1,379
2017	282
Prior	1,334
Revolving	272,050
Total	277,585
Pass \| Real estate – mortgage – home equity loans / lines of credit \| Real estate, mortgage \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		297,795
Pass \| Real estate – mortgage – commercial and other \| Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	624,944
2020	648,750
2019	306,306
2018	182,547
2017	163,321
Prior	253,697
Revolving	43,030
Total	2,222,595
Pass \| Real estate – mortgage – commercial and other \| Real estate, commercial \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		1,988,684
Pass \| Purchased credit impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Total		6,901
Special Mention Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	39,600	61,260
Special Mention Loans \| Commercial, financial, and agricultural \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		9,553
Special Mention Loans \| Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	3
Total	3
Special Mention Loans \| Consumer loans \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		80
Special Mention Loans \| Commercial, financial, and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
2021	17
2020	600
2019	3,199
2018	2,713
2017	202
Prior	34
Revolving	664
Total	7,429
Special Mention Loans \| Real estate – construction, land development & other land loans \| Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	220
2020	761
2019	4,283
2018	1
2017	114
Prior	28
Revolving	12
Total	5,419
Special Mention Loans \| Real estate – construction, land development & other land loans \| Real estate, commercial \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		7,877
Special Mention Loans \| Real estate – mortgage – residential (1-4 family) first mortgages \| Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,182
2020	1,310
2019	205
2018	167
2017	373
Prior	3,170
Revolving	96
Total	6,503
Special Mention Loans \| Real estate – mortgage – residential (1-4 family) first mortgages \| Real estate, mortgage \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		7,609
Special Mention Loans \| Real estate – mortgage – home equity loans / lines of credit \| Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	17
2018	0
2017	0
Prior	19
Revolving	1,151
Total	1,187
Special Mention Loans \| Real estate – mortgage – home equity loans / lines of credit \| Real estate, mortgage \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		1,468
Special Mention Loans \| Real estate – mortgage – commercial and other \| Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	3,889
2020	5,245
2019	2,593
2018	2,780
2017	2,290
Prior	1,479
Revolving	817
Total	19,093
Special Mention Loans \| Real estate – mortgage – commercial and other \| Real estate, commercial \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		34,588
Special Mention Loans \| Purchased credit impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Total		85
Classified
Financing Receivable, Credit Quality Indicator [Line Items]
Total	56,200
Classified \| Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	4
2020	74
2019	26
2018	17
2017	9
Prior	60
Revolving	156
Total	346
Classified \| Commercial, financial, and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	103
2019	1,382
2018	8,019
2017	193
Prior	53
Revolving	443
Total	10,193
Classified \| Real estate – construction, land development & other land loans \| Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	86
2020	415
2019	122
2018	186
2017	59
Prior	123
Revolving	2
Total	993
Classified \| Real estate – mortgage – residential (1-4 family) first mortgages \| Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	370
2020	164
2019	548
2018	1,398
2017	541
Prior	13,122
Revolving	878
Total	17,021
Classified \| Real estate – mortgage – home equity loans / lines of credit \| Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	12
2020	111
2019	66
2018	0
2017	0
Prior	635
Revolving	5,999
Total	6,823
Classified \| Real estate – mortgage – commercial and other \| Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	4,540
2020	3,032
2019	2,520
2018	5,438
2017	4,618
Prior	656
Revolving	0
Total	$ 20,804
Classified Accruing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		25,418
Classified Accruing Loans \| Commercial, financial, and agricultural \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		1,087
Classified Accruing Loans \| Consumer loans \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		169
Classified Accruing Loans \| Real estate – construction, land development & other land loans \| Real estate, commercial \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		1,157
Classified Accruing Loans \| Real estate – mortgage – residential (1-4 family) first mortgages \| Real estate, mortgage \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		11,039
Classified Accruing Loans \| Real estate – mortgage – home equity loans / lines of credit \| Real estate, mortgage \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		5,560
Classified Accruing Loans \| Real estate – mortgage – commercial and other \| Real estate, commercial \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		4,801
Classified Accruing Loans \| Purchased credit impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Total		1,605
Classified Nonaccrual Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		35,076
Classified Nonaccrual Loans \| Commercial, financial, and agricultural \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		9,681
Classified Nonaccrual Loans \| Consumer loans \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		180
Classified Nonaccrual Loans \| Real estate – construction, land development & other land loans \| Real estate, commercial \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		643
Classified Nonaccrual Loans \| Real estate – mortgage – residential (1-4 family) first mortgages \| Real estate, mortgage \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		6,048
Classified Nonaccrual Loans \| Real estate – mortgage – home equity loans / lines of credit \| Real estate, mortgage \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		1,333
Classified Nonaccrual Loans \| Real estate – mortgage – commercial and other \| Real estate, commercial \| Loans, Excluding Purchased Credit Impaired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total		17,191
Classified Nonaccrual Loans \| Purchased credit impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Total		$ 0