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Loans - Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees $ 11,408,840 $ 11,220,355
Loans, including unearned loan fees 11,263,707 11,082,405
Non-Covered Loans    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 11,410,648 11,220,818
Loans, including unearned loan fees 11,408,840 11,220,355
Unearned loan fees, net (1,808) (463)
Loans, before unearned loan fees, after allowance 11,410,648 11,220,818
Non-Covered Loans | Commercial and industrial    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 4,875,484 4,720,428
Loans, including unearned loan fees 4,875,484 4,720,428
Non-Covered Loans | Commercial - investor owned    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 2,741,593 2,607,755
Loans, including unearned loan fees 2,741,593 2,607,755
Non-Covered Loans | Commercial - owner occupied    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 2,326,431 2,359,956
Loans, including unearned loan fees 2,326,431 2,359,956
Non-Covered Loans | Construction and land development    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 846,143 892,563
Loans, including unearned loan fees 846,143 892,563
Non-Covered Loans | Residential    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 363,836 358,923
Loans, including unearned loan fees 363,836 358,923
Non-Covered Loans | Other    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 257,161 281,193
Loans, including unearned loan fees 257,161 281,193
Total Past Due | Non-Covered Loans    
Financing Receivable, Past Due [Line Items]    
Loans, before unearned loan fees 150,677 67,874
Total Past Due | Non-Covered Loans | Commercial and industrial    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 28,121 14,176
Total Past Due | Non-Covered Loans | Commercial - investor owned    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 86,511 15,710
Total Past Due | Non-Covered Loans | Commercial - owner occupied    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 26,405 29,133
Total Past Due | Non-Covered Loans | Construction and land development    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 512 5,721
Total Past Due | Non-Covered Loans | Residential    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 8,991 3,091
Total Past Due | Non-Covered Loans | Other    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 137 43
30-89 Days Past Due | Non-Covered Loans    
Financing Receivable, Past Due [Line Items]    
Loans, before unearned loan fees 38,705 16,835
30-89 Days Past Due | Non-Covered Loans | Commercial and industrial    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 15,593 1,948
30-89 Days Past Due | Non-Covered Loans | Commercial - investor owned    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 9,127 1,377
30-89 Days Past Due | Non-Covered Loans | Commercial - owner occupied    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 11,064 10,542
30-89 Days Past Due | Non-Covered Loans | Construction and land development    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 512 101
30-89 Days Past Due | Non-Covered Loans | Residential    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 2,302 2,833
30-89 Days Past Due | Non-Covered Loans | Other    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 107 34
90 or More Days Past Due | Non-Covered Loans    
Financing Receivable, Past Due [Line Items]    
Loans, before unearned loan fees 111,972 51,039
90 or More Days Past Due | Non-Covered Loans | Commercial and industrial    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 12,528 12,228
90 or More Days Past Due | Non-Covered Loans | Commercial - investor owned    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 77,384 14,333
90 or More Days Past Due | Non-Covered Loans | Commercial - owner occupied    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 15,341 18,591
90 or More Days Past Due | Non-Covered Loans | Construction and land development    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 0 5,620
90 or More Days Past Due | Non-Covered Loans | Residential    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 6,689 258
90 or More Days Past Due | Non-Covered Loans | Other    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 30 9
Current | Non-Covered Loans    
Financing Receivable, Past Due [Line Items]    
Loans, before unearned loan fees 11,259,971 11,152,944
Current | Non-Covered Loans | Commercial and industrial    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 4,847,363 4,706,252
Current | Non-Covered Loans | Commercial - investor owned    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 2,655,082 2,592,045
Current | Non-Covered Loans | Commercial - owner occupied    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 2,300,026 2,330,823
Current | Non-Covered Loans | Construction and land development    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 845,631 886,842
Current | Non-Covered Loans | Residential    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees 354,845 355,832
Current | Non-Covered Loans | Other    
Financing Receivable, Past Due [Line Items]    
Loans, including unearned loan fees $ 257,024 $ 281,150