v3.26.1
Allowance for Credit Losses - Narrative (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]      
Reserve for unfunded credits $ 13,470,000 $ 13,470,000 $ 13,746,000
Provision for credit losses on unfunded commitments 3,100,000 $ 300,000  
Allowance for credit loss, completion of revision, period from forecast start date   5 years  
Qualitative adjustments to models for credit risk, net 42,300,000 $ 42,300,000 24,800,000
General allowance for loan and lease losses 165,100,000 165,100,000 173,400,000
Specific allowance for loan and lease losses 73,100,000 73,100,000 79,400,000
Total loans and leases 17,822,218,000 17,822,218,000 18,029,552,000
Interest income on nonaccrual loans 0 0  
Total      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Total loans and leases 17,822,218,000 17,822,218,000 14,100,820,000
Definite Loss      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Total loans and leases $ 0 $ 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