v3.26.3
LOANS AND LEASES - Additional Information (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
loans
Sep. 30, 2025
USD ($)
loans
Sep. 30, 2026
USD ($)
loans
Sep. 30, 2025
USD ($)
loans
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Financing Receivable, Troubled Debt Restructuring, Subsequent Default $ 500,000 $ 600,000 $ 2,200,000 $ 1,800,000        
Real Estate Acquired Through Foreclosure 160,000 $ 111,000 160,000 $ 111,000 $ 174,000 $ 184,000 $ 204,000 $ 64,000
Unused Commitments to Extend Credit $ 4,812,069,000   $ 4,812,069,000     4,467,728,000    
Impaired receivables, Number of Contracts | loans 5 6 16 19        
Gross loans and leases, excluding accrued interest $ 13,905,082,000   $ 13,905,082,000     13,424,070,000    
Finance Receivable Past Due Period For Nonaccrual Status     90          
Nonaccrual Loans, Review Threshold Amount Minimum     $ 250,000          
Commercial segment                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Gross loans and leases, excluding accrued interest 21,127,000   21,127,000     27,461,000    
Residential real estate                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Gross loans and leases, excluding accrued interest 18,358,000   18,358,000     18,302,000    
Lease financing                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Gross loans and leases, excluding accrued interest 1,459,000   1,459,000     $ 5,660,000    
Financial Difficulty Modification                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Unused Commitments to Extend Credit $ 0 $ 0 $ 0 $ 0