Quarterly report [Sections 13 or 15(d)]

LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Schedule of Stated at Face Amount, Net of Unearned Income) (Details)

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LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Schedule of Stated at Face Amount, Net of Unearned Income) (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Jun. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Dec. 31, 2024
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of unearned income $ 29,296,616   $ 27,796,167      
Total Allowance for credit losses (301,432) $ (298,756) (295,108) $ (293,035) $ (315,574) $ (178,644)
Total loans held for investment, net 28,995,184   27,501,059      
Loans receivable, deferred fees and costs 693,900   803,200      
Construction and Land Development            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of unearned income 2,025,385   1,666,381      
CRE - Owner Occupied            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of unearned income 4,356,099   4,305,796      
CRE - Non-Owner Occupied            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of unearned income 7,275,895   7,178,515      
Multifamily Real Estate            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of unearned income 2,382,541   2,418,250      
Commercial and Industrial            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of unearned income 5,850,846   5,229,728      
Residential 1-4 Family - Commercial            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of unearned income 984,149   1,100,157      
Residential 1-4 Family - Consumer            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of unearned income 2,991,674   2,825,259      
Residential 1-4 Family - Revolving            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of unearned income 1,346,890   1,248,284      
Auto            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of unearned income 110,418   183,720      
Consumer            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of unearned income 107,158   121,488      
Other Commercial            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of unearned income $ 1,865,561   $ 1,518,589