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
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Loans and Leases Receivable Disclosure [Line Items]        
LHFI, net of unearned income $ 27,946,424 $ 27,796,167    
Total Allowance for credit losses (291,100) (295,108) $ (193,796) $ (178,644)
Total loans held for investment, net 27,655,324 27,501,059    
Loans receivable, deferred fees and costs 761,000 803,200    
Construction and Land Development        
Loans and Leases Receivable Disclosure [Line Items]        
LHFI, net of unearned income 1,748,413 1,666,381    
CRE - Owner Occupied        
Loans and Leases Receivable Disclosure [Line Items]        
LHFI, net of unearned income 4,319,847 4,305,796    
CRE - Non-Owner Occupied        
Loans and Leases Receivable Disclosure [Line Items]        
LHFI, net of unearned income 7,212,035 7,178,515    
Multifamily Real Estate        
Loans and Leases Receivable Disclosure [Line Items]        
LHFI, net of unearned income 2,321,504 2,418,250    
Commercial and Industrial        
Loans and Leases Receivable Disclosure [Line Items]        
LHFI, net of unearned income 5,384,856 5,229,728    
Residential 1-4 Family - Commercial        
Loans and Leases Receivable Disclosure [Line Items]        
LHFI, net of unearned income 1,053,303 1,100,157    
Residential 1-4 Family - Consumer        
Loans and Leases Receivable Disclosure [Line Items]        
LHFI, net of unearned income 2,839,216 2,825,259    
Residential 1-4 Family - Revolving        
Loans and Leases Receivable Disclosure [Line Items]        
LHFI, net of unearned income 1,257,079 1,248,284    
Auto        
Loans and Leases Receivable Disclosure [Line Items]        
LHFI, net of unearned income 156,843 183,720    
Consumer        
Loans and Leases Receivable Disclosure [Line Items]        
LHFI, net of unearned income 109,755 121,488    
Other Commercial        
Loans and Leases Receivable Disclosure [Line Items]        
LHFI, net of unearned income $ 1,543,573 $ 1,518,589