Quarterly report pursuant to Section 13 or 15(d)

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

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LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Loans Stated at Face Amount, Net of Unearned Income) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of deferred fees and costs $ 15,283,620   $ 14,449,142      
Total Allowance for credit losses (125,627) $ (120,683) (110,768) $ (108,009) $ (104,184) $ (99,787)
Total loans held for investment, net 15,157,993   14,338,374      
Loans receivable, deferred fees and costs 58,400   50,400      
Construction and Land Development            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of deferred fees and costs 1,132,940   1,101,260      
Commercial Real Estate - Owner Occupied            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of deferred fees and costs 1,975,281   1,982,608      
Commercial Real Estate - Non-Owner Occupied            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of deferred fees and costs 4,148,218   3,996,130      
Multifamily Real Estate            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of deferred fees and costs 947,153   802,923      
Commercial and Industrial            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of deferred fees and costs 3,432,319   2,983,349      
Residential 1-4 Family - Commercial            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of deferred fees and costs 517,034   538,063      
Residential 1-4 Family - Mortgage            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of deferred fees and costs 1,057,294   940,275      
Residential 1-4 Family - Revolving            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of deferred fees and costs 599,282   585,184      
Auto            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of deferred fees and costs 534,361   592,976      
Consumer            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of deferred fees and costs 126,151   152,545      
Other Commercial            
Loans and Leases Receivable Disclosure [Line Items]            
LHFI, net of deferred fees and costs $ 813,587   $ 773,829