v3.26.3
Allowance for Credit Losses - Schedule of Accruing and Nonaccrual Modified Loans (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Sep. 30, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months $ 46,440 $ 32,027
Current    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 19,649 20,550
30-59 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 49 0
60-89 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
90+ days past due and still accruing    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Nonaccrual    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 26,742 11,477
Real estate loan | Commercial mortgage    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 17,350 2,347
Real estate loan | Commercial mortgage | Current    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 4,225 2,347
Real estate loan | Commercial mortgage | 30-59 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Real estate loan | Commercial mortgage | 60-89 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Real estate loan | Commercial mortgage | 90+ days past due and still accruing    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Real estate loan | Commercial mortgage | Nonaccrual    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 13,125 0
Real estate loan | Residential mortgage    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 222 1,310
Real estate loan | Residential mortgage | Current    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Real estate loan | Residential mortgage | 30-59 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Real estate loan | Residential mortgage | 60-89 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Real estate loan | Residential mortgage | 90+ days past due and still accruing    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Real estate loan | Residential mortgage | Nonaccrual    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 222 1,310
Real estate loan | Construction and land development    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 15,162 17,079
Real estate loan | Construction and land development | Current    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 3,500 11,068
Real estate loan | Construction and land development | 30-59 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Real estate loan | Construction and land development | 60-89 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Real estate loan | Construction and land development | 90+ days past due and still accruing    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Real estate loan | Construction and land development | Nonaccrual    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 11,662 6,011
Commercial, industrial & other finance receivables    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 10,431 2,441
Commercial, industrial & other finance receivables | Current    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 9,639 1,949
Commercial, industrial & other finance receivables | 30-59 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Commercial, industrial & other finance receivables | 60-89 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Commercial, industrial & other finance receivables | 90+ days past due and still accruing    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Commercial, industrial & other finance receivables | Nonaccrual    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 792 492
Small business loans    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 3,057 7,897
Small business loans | Current    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 2,286 5,186
Small business loans | 30-59 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 49 0
Small business loans | 60-89 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Small business loans | 90+ days past due and still accruing    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Small business loans | Nonaccrual    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 723 2,711
Leases, net    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 218 953
Leases, net | Current    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Leases, net | 30-59 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Leases, net | 60-89 days past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Leases, net | 90+ days past due and still accruing    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months 0 0
Leases, net | Nonaccrual    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Modified loans to borrowers experiencing financial difficulty, modified in the last 12 months $ 218 $ 953