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Loans and Allowance for Loan Losses Loan Classification by Risk Rating Category (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Receivables [Abstract]      
Percentage of loan portfolio as commercial loan 79.20%    
Risk rated loans $ 1,500    
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 7,801,081    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 8,956,751    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 5,834,396    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 2,057,226    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 1,215,843    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,222,983    
Financing Receivable, Revolving 5,587,811    
Loans 32,676,091 $ 29,041,605  
Potential problem loans 127,400 53,800  
Charged-off loans (76,725) (54,176) $ (54,996)
2023      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (3,579)    
2022      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (24,968)    
2021      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (20,325)    
2020      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (6,123)    
2019      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (435)    
Prior      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (1,040)    
Revolving Loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (20,255)    
Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 7,731,335    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 8,844,015    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 5,742,666    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 2,038,952    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 1,202,431    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,196,095    
Financing Receivable, Revolving 5,479,475    
Loans 32,234,969    
Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 15,448    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 90,359    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 17,757    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 13,996    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 5,666    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 11,883    
Financing Receivable, Revolving 45,025    
Loans 200,134    
Substandard Accrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year [1] 41,393    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year [1] 14,543    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year [1] 28,573    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year [1] 1,290    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year [1] 2,122    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year [1] 9,793    
Financing Receivable, Revolving [1] 60,986    
Loans [1] 158,700    
Substandard Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 12,905    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 7,834    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 45,400    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 2,987    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 5,624    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 5,212    
Financing Receivable, Revolving 2,325    
Loans 82,287    
Doubtful Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [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 1    
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, Revolving 0    
Loans 1    
Commercial Real Estate Owner Occupied      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 794,738    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,170,695    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 880,637    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 505,710    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 273,469    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 362,967    
Financing Receivable, Revolving 56,680    
Loans 4,044,896 3,587,257  
Charged-off loans 0 (1,413) (1,420)
Commercial Real Estate Owner Occupied | 2023      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial Real Estate Owner Occupied | 2022      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial Real Estate Owner Occupied | 2021      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial Real Estate Owner Occupied | 2020      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial Real Estate Owner Occupied | 2019      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial Real Estate Owner Occupied | Prior      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial Real Estate Owner Occupied | Revolving Loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial Real Estate Owner Occupied | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 785,834    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,123,425    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 871,389    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 502,260    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 267,595    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 357,339    
Financing Receivable, Revolving 56,680    
Loans 3,964,522    
Commercial Real Estate Owner Occupied | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 1,595    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 37,324    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 5,300    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 2,252    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 5,306    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 4,701    
Financing Receivable, Revolving 0    
Loans 56,478    
Commercial Real Estate Owner Occupied | Substandard Accrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year [1] 5,528    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year [1] 9,331    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year [1] 3,262    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year [1] 1,145    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year [1] 568    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year [1] 610    
Financing Receivable, Revolving [1] 0    
Loans [1] 20,444    
Commercial Real Estate Owner Occupied | Substandard Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 1,781    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 615    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 686    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 53    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 317    
Financing Receivable, Revolving 0    
Loans 3,452    
Commercial Real Estate Owner Occupied | Doubtful Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [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, Revolving 0    
Loans 0    
Commercial real estate non owner occupied      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 1,329,832    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 2,715,626    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,777,455    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 720,724    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 507,178    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 376,317    
Financing Receivable, Revolving 108,362    
Loans 7,535,494 6,542,619  
Charged-off loans 0 (185) (786)
Commercial real estate non owner occupied | 2023      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial real estate non owner occupied | 2022      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial real estate non owner occupied | 2021      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial real estate non owner occupied | 2020      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial real estate non owner occupied | 2019      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial real estate non owner occupied | Prior      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial real estate non owner occupied | Revolving Loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Commercial real estate non owner occupied | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 1,304,109    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 2,682,275    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,737,275    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 713,979    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 505,767    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 370,420    
Financing Receivable, Revolving 107,841    
Loans 7,421,666    
Commercial real estate non owner occupied | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 0    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 30,229    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 6,745    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 216    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 5,335    
Financing Receivable, Revolving 0    
Loans 42,525    
Commercial real estate non owner occupied | Substandard Accrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year [1] 25,723    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year [1] 2,969    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year [1] 0    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year [1] 0    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year [1] 1,195    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year [1] 73    
Financing Receivable, Revolving [1] 0    
Loans [1] 29,960    
Commercial real estate non owner occupied | Substandard Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 0    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 153    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 40,180    
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 489    
Financing Receivable, Revolving 521    
Loans 41,343    
Commercial real estate non owner occupied | Doubtful Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [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, Revolving 0    
Loans 0    
Consumer Real Estate      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 573,808    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 978,271    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,059,671    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 450,945    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 213,055    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 322,176    
Financing Receivable, Revolving 1,253,605    
Loans 4,851,531 4,435,046  
Charged-off loans (883) (651) (632)
Consumer Real Estate | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 573,120    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 976,006    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,056,720    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 448,420    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 207,790    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 318,505    
Financing Receivable, Revolving 1,253,091    
Loans 4,833,652    
Consumer Real Estate | Special Mention      
Accounts, Notes, Loans and Financing Receivable [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, Revolving 0    
Loans 0    
Consumer Real Estate | Substandard Accrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year [1] 0    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year [1] 0    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year [1] 0    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year [1] 0    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year [1] 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year [1] 0    
Financing Receivable, Revolving [1] 0    
Loans [1] 0    
Consumer Real Estate | Substandard Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 688    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 2,265    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 2,951    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 2,525    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 5,265    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 3,671    
Financing Receivable, Revolving 514    
Loans 17,879    
Consumer Real Estate | Doubtful Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [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, Revolving 0    
Loans 0    
Construction and Land Development      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 1,155,865    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,930,670    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 884,060    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 16,569    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 5,580    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 6,451    
Financing Receivable, Revolving 41,886    
Loans 4,041,081 3,679,498  
Charged-off loans (3) (150) (367)
Construction and Land Development | 2023      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Construction and Land Development | 2022      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Construction and Land Development | 2021      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Construction and Land Development | 2020      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Construction and Land Development | 2019      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Construction and Land Development | Prior      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (3)    
Construction and Land Development | Revolving Loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Construction and Land Development | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 1,153,137    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,930,062    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 884,060    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 12,102    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 5,580    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 6,369    
Financing Receivable, Revolving 41,886    
Loans 4,033,196    
Construction and Land Development | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 2,728    
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 4,467    
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, Revolving 0    
Loans 7,195    
Construction and Land Development | Substandard Accrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year [1] 0    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year [1] 0    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year [1] 0    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year [1] 0    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year [1] 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year [1] 82    
Financing Receivable, Revolving [1] 0    
Loans [1] 82    
Construction and Land Development | Substandard Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 0    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 608    
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, Revolving 0    
Loans 608    
Construction and Land Development | Doubtful Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [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, Revolving 0    
Loans 0    
Commercial and Industrial      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 3,810,029    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 2,132,715    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,166,447    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 326,263    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 216,020    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 154,416    
Financing Receivable, Revolving 3,860,801    
Loans 11,666,691 10,241,362  
Charged-off loans (60,542) (39,020) (46,213)
Commercial and Industrial | 2023      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (3,428)    
Commercial and Industrial | 2022      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (24,114)    
Commercial and Industrial | 2021      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (13,857)    
Commercial and Industrial | 2020      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (3,309)    
Commercial and Industrial | 2019      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (111)    
Commercial and Industrial | Prior      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (455)    
Commercial and Industrial | Revolving Loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (15,268)    
Commercial and Industrial | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 3,778,326    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 2,103,473    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,127,096    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 325,176    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 215,158    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 142,806    
Financing Receivable, Revolving 3,753,575    
Loans 11,445,610    
Commercial and Industrial | Special Mention      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 11,125    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 22,806    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 12,457    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 532    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 144    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,847    
Financing Receivable, Revolving 45,025    
Loans 93,936    
Commercial and Industrial | Substandard Accrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year [1] 10,142    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year [1] 2,243    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year [1] 25,311    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year [1] 145    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year [1] 359    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year [1] 9,028    
Financing Receivable, Revolving [1] 60,986    
Loans [1] 108,214    
Commercial and Industrial | Substandard Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 10,436    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 4,193    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,583    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 409    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 359    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 735    
Financing Receivable, Revolving 1,215    
Loans 18,930    
Commercial and Industrial | Doubtful Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [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 1    
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, Revolving 0    
Loans 1    
Consumer and Other      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 136,809    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 28,774    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 66,126    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 37,015    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 541    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 656    
Financing Receivable, Revolving 266,477    
Loans 536,398 555,823  
Charged-off loans (15,297) $ (12,757) $ (5,578)
Consumer and Other | 2023      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (151)    
Consumer and Other | 2022      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (629)    
Consumer and Other | 2021      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (6,377)    
Consumer and Other | 2020      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (2,808)    
Consumer and Other | 2019      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (235)    
Consumer and Other | Prior      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (110)    
Consumer and Other | Revolving Loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (4,987)    
Consumer and Other | Pass      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year 136,809    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 28,774    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 66,126    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 37,015    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 541    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 656    
Financing Receivable, Revolving 266,402    
Loans 536,323    
Consumer and Other | Special Mention      
Accounts, Notes, Loans and Financing Receivable [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, Revolving 0    
Loans 0    
Consumer and Other | Substandard Accrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing Receivable, Year One, Originated, Current Fiscal Year [1] 0    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year [1] 0    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year [1] 0    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year [1] 0    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year [1] 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year [1] 0    
Financing Receivable, Revolving [1] 0    
Loans [1] 0    
Consumer and Other | Substandard Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [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, Revolving 75    
Loans 75    
Consumer and Other | Doubtful Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [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, Revolving 0    
Loans 0    
Consumer Real Estate      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (883)    
Consumer Real Estate | 2023      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans 0    
Consumer Real Estate | 2022      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (225)    
Consumer Real Estate | 2021      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (91)    
Consumer Real Estate | 2020      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (6)    
Consumer Real Estate | 2019      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (89)    
Consumer Real Estate | Prior      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans (472)    
Consumer Real Estate | Revolving Loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Charged-off loans $ 0    
[1] Potential problem loans represent those loans with a well-defined weakness and where information about possible credit problems of borrowers has caused management to have doubts about the borrower's ability to comply with present repayment terms. This definition is believed to be substantially consistent with the standards established by Pinnacle Bank's primary regulators for loans classified as substandard, excluding loan modifications made to borrowers experiencing financial difficulty. Potential problem loans, which are not included in nonaccrual loans, amounted to approximately $127.4 million at December 31, 2023, compared to $53.8 million at December 31, 2022.