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Loans And Allowance For Loan Losses (Loan Portfolio Credit Exposure) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]    
Allowance for loan and lease losses, percent of loan amount 50.00% 50.00%
Deferred fees and costs, net $ 77,700 $ 25,400
Financing Receivable, Year One, Originated, Current Fiscal Year 8,763,771  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 6,271,354  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 4,987,685  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 3,878,049  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 2,595,487  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 4,701,977  
Financing Receivable, before Allowance for Credit Loss and Fee 38,330,656 37,187,814
Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 6,984,920  
Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 147,413  
Payment Protection Program Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Deferred fees and costs, net (48,900)  
Total commercial and industrial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 5,289,855  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 2,583,039  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 2,029,156  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 1,664,851  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 1,131,383  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 2,016,380  
Financing Receivable, before Allowance for Credit Loss and Fee 19,373,679 16,769,370
Total commercial and industrial | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 4,608,185  
Total commercial and industrial | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 50,830  
Total commercial and industrial | Commercial, financial, and agricultural    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 3,954,945  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,415,849  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 905,015  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 640,996  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 567,139  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 726,043  
Financing Receivable, before Allowance for Credit Loss and Fee 12,574,899 10,239,559
Total commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 4,314,082  
Total commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 50,830  
Total commercial and industrial | Owner-occupied    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 1,334,910  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,167,190  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,124,141  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 1,023,855  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 564,244  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,290,337  
Financing Receivable, before Allowance for Credit Loss and Fee 6,798,780 6,529,811
Total commercial and industrial | Owner-occupied | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 294,103  
Total commercial and industrial | Owner-occupied | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Total commercial real estate    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 1,356,036  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 2,620,960  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 2,442,605  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 1,432,392  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 696,939  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,651,050  
Financing Receivable, before Allowance for Credit Loss and Fee 10,570,434 10,493,784
Total commercial real estate | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 370,452  
Total commercial real estate | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Total commercial real estate | Investment properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 1,069,244  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 2,348,942  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 2,276,157  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 1,248,459  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 644,460  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,472,007  
Financing Receivable, before Allowance for Credit Loss and Fee 9,346,530 9,004,327
Total commercial real estate | Investment properties | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 287,261  
Total commercial real estate | Investment properties | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Total commercial real estate | 1-4 family properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 199,371  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 95,863  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 75,134  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 89,757  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 40,082  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 99,796  
Financing Receivable, before Allowance for Credit Loss and Fee 629,168 780,015
Total commercial real estate | 1-4 family properties | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 29,165  
Total commercial real estate | 1-4 family properties | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Total commercial real estate | Land and development    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 87,421  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 176,155  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 91,314  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 94,176  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 12,397  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 79,247  
Financing Receivable, before Allowance for Credit Loss and Fee 594,736 709,442
Total commercial real estate | Land and development | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 54,026  
Total commercial real estate | Land and development | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Total consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 2,117,880  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,067,355  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 515,924  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 780,806  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 767,165  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,034,547  
Financing Receivable, before Allowance for Credit Loss and Fee 8,386,543 9,924,660
Total consumer | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 2,006,283  
Total consumer | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 96,583  
Total consumer | Consumer mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 1,865,703  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 875,756  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 426,469  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 679,154  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 686,680  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 972,898  
Financing Receivable, before Allowance for Credit Loss and Fee 5,507,700 5,546,368
Total consumer | Consumer mortgages | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 1,040  
Total consumer | Consumer mortgages | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Total consumer | Home equity lines    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0  
Financing Receivable, before Allowance for Credit Loss and Fee 1,523,836 1,713,157
Total consumer | Home equity lines | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 1,427,253  
Total consumer | Home equity lines | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 96,583  
Total consumer | Credit cards    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0  
Financing Receivable, before Allowance for Credit Loss and Fee 281,018 268,841
Total consumer | Credit cards | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 281,018  
Total consumer | Credit cards | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Total consumer | Other consumer loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 252,177  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 191,599  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 89,455  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 101,652  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 80,485  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 61,649  
Financing Receivable, before Allowance for Credit Loss and Fee 1,073,989 2,396,294
Total consumer | Other consumer loans | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 296,972  
Total consumer | Other consumer loans | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Pass    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   36,572,183
Pass | Total commercial and industrial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   16,313,114
Pass | Total commercial and industrial | Commercial, financial, and agricultural    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 3,862,940  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,334,892  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 847,647  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 582,854  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 552,666  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 685,326  
Financing Receivable, before Allowance for Credit Loss and Fee 12,084,947 9,927,059
Pass | Total commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 4,168,795  
Pass | Total commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 49,827  
Pass | Total commercial and industrial | Owner-occupied    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 1,326,170  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,134,402  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,061,206  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 983,684  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 555,346  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,246,775  
Financing Receivable, before Allowance for Credit Loss and Fee 6,601,686 6,386,055
Pass | Total commercial and industrial | Owner-occupied | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 294,103  
Pass | Total commercial and industrial | Owner-occupied | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Pass | Total commercial real estate    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   10,377,892
Pass | Total commercial real estate | Investment properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 1,066,755  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 2,278,012  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 2,074,887  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 1,092,635  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 484,223  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,302,097  
Financing Receivable, before Allowance for Credit Loss and Fee 8,530,395 8,930,360
Pass | Total commercial real estate | Investment properties | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 231,786  
Pass | Total commercial real estate | Investment properties | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Pass | Total commercial real estate | 1-4 family properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 197,442  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 95,210  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 70,314  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 88,507  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 38,742  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 97,379  
Financing Receivable, before Allowance for Credit Loss and Fee 615,419 766,529
Pass | Total commercial real estate | 1-4 family properties | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 27,825  
Pass | Total commercial real estate | 1-4 family properties | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Pass | Total commercial real estate | Land and development    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 85,335  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 173,735  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 83,784  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 92,979  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 12,261  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 76,430  
Financing Receivable, before Allowance for Credit Loss and Fee 577,914 681,003
Pass | Total commercial real estate | Land and development | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 53,390  
Pass | Total commercial real estate | Land and development | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Pass | Total consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   9,881,177
Pass | Total consumer | Consumer mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 1,865,670  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 874,795  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 425,721  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 678,265  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 685,814  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 965,383  
Financing Receivable, before Allowance for Credit Loss and Fee 5,496,688 5,527,746
Pass | Total consumer | Consumer mortgages | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 1,040  
Pass | Total consumer | Consumer mortgages | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Pass | Total consumer | Home equity lines    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0  
Financing Receivable, before Allowance for Credit Loss and Fee 1,506,697 1,697,086
Pass | Total consumer | Home equity lines | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 1,416,272  
Pass | Total consumer | Home equity lines | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 90,425  
Pass | Total consumer | Credit cards    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0  
Financing Receivable, before Allowance for Credit Loss and Fee 279,142 266,146
Pass | Total consumer | Credit cards | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 279,142  
Pass | Total consumer | Credit cards | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Pass | Total consumer | Other consumer loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 252,158  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 190,837  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 89,193  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 100,457  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 80,364  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 61,029  
Financing Receivable, before Allowance for Credit Loss and Fee 1,070,783 2,390,199
Pass | Total consumer | Other consumer loans | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 296,745  
Pass | Total consumer | Other consumer loans | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Special Mention    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   225,218
Special Mention | Total commercial and industrial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   186,836
Special Mention | Total commercial and industrial | Commercial, financial, and agricultural    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 63,307  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 40,618  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 12,723  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 22,070  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 1,665  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 5,545  
Financing Receivable, before Allowance for Credit Loss and Fee 207,158 128,506
Special Mention | Total commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 60,741  
Special Mention | Total commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 489  
Special Mention | Total commercial and industrial | Owner-occupied    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 6,170  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 9,995  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 10,682  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 14,138  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 1,582  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 13,768  
Financing Receivable, before Allowance for Credit Loss and Fee 56,335 58,330
Special Mention | Total commercial and industrial | Owner-occupied | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Special Mention | Total commercial and industrial | Owner-occupied | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Special Mention | Total commercial real estate    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   38,382
Special Mention | Total commercial real estate | Investment properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 1,482  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 66,160  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 176,794  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 136,004  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 138,362  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 129,401  
Financing Receivable, before Allowance for Credit Loss and Fee 703,643 16,490
Special Mention | Total commercial real estate | Investment properties | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 55,440  
Special Mention | Total commercial real estate | Investment properties | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Special Mention | Total commercial real estate | 1-4 family properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 402  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 508  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 109  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 786  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 118  
Financing Receivable, before Allowance for Credit Loss and Fee 1,923 3,249
Special Mention | Total commercial real estate | 1-4 family properties | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Special Mention | Total commercial real estate | 1-4 family properties | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Special Mention | Total commercial real estate | Land and development    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 857  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,995  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 2,866  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 282  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,332  
Financing Receivable, before Allowance for Credit Loss and Fee 7,968 18,643
Special Mention | Total commercial real estate | Land and development | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 636  
Special Mention | Total commercial real estate | Land and development | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Special Mention | Total consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Special Mention | Total consumer | Consumer mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Special Mention | Total consumer | Home equity lines    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Special Mention | Total consumer | Credit cards    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Special Mention | Total consumer | Other consumer loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Substandard    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   385,862
Substandard | Total commercial and industrial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   268,257
Substandard | Total commercial and industrial | Commercial, financial, and agricultural    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 28,698  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 36,618  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 24,867  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 36,072  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 12,808  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 35,172  
Financing Receivable, before Allowance for Credit Loss and Fee 259,247 182,831
Substandard | Total commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 84,498  
Substandard | Total commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 514  
Substandard | Total commercial and industrial | Owner-occupied    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 2,570  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 22,793  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 42,615  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 26,033  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 7,316  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 29,794  
Financing Receivable, before Allowance for Credit Loss and Fee 131,121 85,426
Substandard | Total commercial and industrial | Owner-occupied | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Substandard | Total commercial and industrial | Owner-occupied | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Substandard | Total commercial real estate    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   77,510
Substandard | Total commercial real estate | Investment properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 1,007  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 4,770  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 24,476  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 19,820  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 21,875  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 40,509  
Financing Receivable, before Allowance for Credit Loss and Fee 112,492 57,477
Substandard | Total commercial real estate | Investment properties | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 35  
Substandard | Total commercial real estate | Investment properties | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Substandard | Total commercial real estate | 1-4 family properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 1,527  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 653  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 4,312  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 1,141  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 554  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 2,299  
Financing Receivable, before Allowance for Credit Loss and Fee 11,826 10,237
Substandard | Total commercial real estate | 1-4 family properties | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 1,340  
Substandard | Total commercial real estate | 1-4 family properties | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Substandard | Total commercial real estate | Land and development    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 1,229  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 425  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 4,664  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 915  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 136  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,485  
Financing Receivable, before Allowance for Credit Loss and Fee 8,854 9,796
Substandard | Total commercial real estate | Land and development | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Substandard | Total commercial real estate | Land and development | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Substandard | Total consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   40,095
Substandard | Total consumer | Consumer mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 33  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 961  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 748  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 889  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 866  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 7,224  
Financing Receivable, before Allowance for Credit Loss and Fee 10,721 18,376
Substandard | Total consumer | Consumer mortgages | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Substandard | Total consumer | Consumer mortgages | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Substandard | Total consumer | Home equity lines    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0  
Financing Receivable, before Allowance for Credit Loss and Fee 15,694 14,806
Substandard | Total consumer | Home equity lines | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 9,698  
Substandard | Total consumer | Home equity lines | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 5,996  
Substandard | Total consumer | Credit cards    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0  
Financing Receivable, before Allowance for Credit Loss and Fee 595 818
Substandard | Total consumer | Credit cards | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 595  
Substandard | Total consumer | Credit cards | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Substandard | Total consumer | Other consumer loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 19  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 762  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 262  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 1,195  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 121  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 585  
Financing Receivable, before Allowance for Credit Loss and Fee 3,171 6,095
Substandard | Total consumer | Other consumer loans | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 227  
Substandard | Total consumer | Other consumer loans | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Doubtful    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   1,281
Doubtful | Total commercial and industrial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   1,163
Doubtful | Total commercial and industrial | Commercial, financial, and agricultural    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 3,721  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 19,778  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0  
Financing Receivable, before Allowance for Credit Loss and Fee 23,547 1,163
Doubtful | Total commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 48  
Doubtful | Total commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Doubtful | Total commercial and industrial | Owner-occupied    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 9,638  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0  
Financing Receivable, before Allowance for Credit Loss and Fee 9,638 0
Doubtful | Total commercial and industrial | Owner-occupied | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Doubtful | Total commercial and industrial | Owner-occupied | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Doubtful | Total commercial real estate    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Doubtful | Total commercial real estate | Investment properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Doubtful | Total commercial real estate | 1-4 family properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Doubtful | Total commercial real estate | Land and development    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Doubtful | Total consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   118
Doubtful | Total consumer | Consumer mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   97
Doubtful | Total consumer | Home equity lines    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0  
Financing Receivable, before Allowance for Credit Loss and Fee 19 21
Doubtful | Total consumer | Home equity lines | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Doubtful | Total consumer | Home equity lines | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 19  
Doubtful | Total consumer | Credit cards    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Doubtful | Total consumer | Other consumer loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Loss And Charged Off    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   3,270
Loss And Charged Off | Total commercial and industrial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Loss And Charged Off | Total commercial and industrial | Commercial, financial, and agricultural    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Loss And Charged Off | Total commercial and industrial | Owner-occupied    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Loss And Charged Off | Total commercial real estate    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Loss And Charged Off | Total commercial real estate | Investment properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Loss And Charged Off | Total commercial real estate | 1-4 family properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Loss And Charged Off | Total commercial real estate | Land and development    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   0
Loss And Charged Off | Total consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee   3,270
Loss And Charged Off | Total consumer | Consumer mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 291  
Financing Receivable, before Allowance for Credit Loss and Fee 291 149
Loss And Charged Off | Total consumer | Consumer mortgages | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Loss And Charged Off | Total consumer | Consumer mortgages | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Loss And Charged Off | Total consumer | Home equity lines    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0  
Financing Receivable, before Allowance for Credit Loss and Fee 1,426 1,244
Loss And Charged Off | Total consumer | Home equity lines | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 1,283  
Loss And Charged Off | Total consumer | Home equity lines | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 143  
Loss And Charged Off | Total consumer | Credit cards    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0  
Financing Receivable, before Allowance for Credit Loss and Fee 1,281 1,877
Loss And Charged Off | Total consumer | Credit cards | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 1,281  
Loss And Charged Off | Total consumer | Credit cards | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Loss And Charged Off | Total consumer | Other consumer loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 35  
Financing Receivable, before Allowance for Credit Loss and Fee 35 $ 0
Loss And Charged Off | Total consumer | Other consumer loans | Revolving Loans Amortized Cost Basis [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee 0  
Loss And Charged Off | Total consumer | Other consumer loans | Revolving Loans Converted to Term Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss and Fee $ 0