v3.26.1
Allowance for Credit Losses - Narrative (Details) - USD ($)
 3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]    
Reserve for unfunded credits $ 16,555,000 $ 13,746,000
Provision for credit losses on unfunded commitments $ 2,800,000  
Allowance for credit loss, completion of revision, period from forecast start date 5 years  
Qualitative adjustments to models for credit risk, net $ 35,000,000.0  
General allowance for loan and lease losses 165,600,000 173,400,000
Specific allowance for loan and lease losses 78,900,000 79,400,000
Total loans and leases 17,924,156,000 18,029,552,000
Interest income on nonaccrual loans 0  
Total    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Total loans and leases 17,924,156,000 14,100,820,000
Definite Loss    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Total loans and leases $ 0 $ 0
Minimum    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Allowance for credit loss, start of revision, period from forecast start date 2 years  
Maximum    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Allowance for credit loss, start of revision, period from forecast start date 3 years