Annual report pursuant to Section 13 and 15(d)

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

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Stated at Face Amount, Net of Unearned Income) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]        
Loans held for investment, net of deferred fees and costs $ 13,195,843 $ 14,021,314    
Total Allowance for credit losses (99,787) (160,540) $ (94,838) $ (43,194)
Total loans held for investment, net 13,096,056 13,860,774    
Loans receivable, deferred fees and costs 49,300 69,700    
Construction and Land Development        
Loans and Leases Receivable Disclosure [Line Items]        
Loans held for investment, net of deferred fees and costs 862,236 925,798    
Commercial Real Estate - Owner Occupied        
Loans and Leases Receivable Disclosure [Line Items]        
Loans held for investment, net of deferred fees and costs 1,995,409 2,128,909    
Commercial Real Estate - Non-Owner Occupied        
Loans and Leases Receivable Disclosure [Line Items]        
Loans held for investment, net of deferred fees and costs 3,789,377 3,657,562    
Multifamily Real Estate        
Loans and Leases Receivable Disclosure [Line Items]        
Loans held for investment, net of deferred fees and costs 778,626 814,745    
Commercial and Industrial        
Loans and Leases Receivable Disclosure [Line Items]        
Loans held for investment, net of deferred fees and costs 2,542,243 3,263,460    
Residential 1-4 Family - Commercial        
Loans and Leases Receivable Disclosure [Line Items]        
Loans held for investment, net of deferred fees and costs 607,337 671,949    
Residential 1-4 Family - Mortgage        
Loans and Leases Receivable Disclosure [Line Items]        
Loans held for investment, net of deferred fees and costs 816,524 822,866    
Residential 1-4 Family - Revolving        
Loans and Leases Receivable Disclosure [Line Items]        
Loans held for investment, net of deferred fees and costs 560,796 596,996    
Auto        
Loans and Leases Receivable Disclosure [Line Items]        
Loans held for investment, net of deferred fees and costs 461,052 401,324    
Consumer        
Loans and Leases Receivable Disclosure [Line Items]        
Loans held for investment, net of deferred fees and costs 176,992 247,730    
Other Commercial        
Loans and Leases Receivable Disclosure [Line Items]        
Loans held for investment, net of deferred fees and costs 605,251 489,975    
Paycheck Protection Program (PPP) | Commercial and Industrial        
Loans and Leases Receivable Disclosure [Line Items]        
Total loans held for investment, net 145,300 1,200,000    
Paycheck Protection Program (PPP) | Other Commercial        
Loans and Leases Receivable Disclosure [Line Items]        
Total loans held for investment, net $ 5,100 $ 11,300