Quarterly report [Sections 13 or 15(d)]

LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Narrative) (Details)

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LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Narrative) (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
segment
Jan. 01, 2026
segment
Jan. 01, 2026
loan
Loans and Allowance for Loan Losses [Abstract]          
Loans held for investment, accrued interest receivable $ 101,900,000   $ 106,500,000    
Financing Receivable Accrued Interest After Allowance For Credit Loss Statement Of Financial Position Extensible List Not Disclosed (Flag) true   true    
Nonaccrual loans, interest income $ 0 $ 0      
TLM loans that went into default 0 0      
TLMs that are past due 0 0      
Unfunded commitments on loans modified and designated as TLMs 0   $ 0    
Number of loan portfolio segments     2 3 3
Revolving loans converted to term 0   $ 0    
Accrued interest receivable write-offs $ 0 $ 0