XML 41 R32.htm IDEA: XBRL DOCUMENT v3.22.1
Allowance for Losses on Loans - Additional Information (Details) - USD ($)
 3 Months Ended 6 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Sep. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Provision (release) for credit losses $ (500,000) $ 0 $ 0 $ 3,000,000        
Net (charge-offs) recoveries 473,000 2,464,000 2,584,000 4,198,000        
Allowance for credit losses on loans 171,384,000 172,653,000 171,384,000 172,653,000 $ 171,411,000 $ 171,300,000 $ 170,189,000 $ 166,955,000
Gross loans $ 15,266,310,000   $ 15,266,310,000     $ 14,004,870,000    
% based on $, past due 0.30%   0.30%     0.19%    
Financial Asset Originated                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Non-accrual loans $ 33,639,000   $ 33,639,000     $ 31,749,000    
Non-Performing Loans                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Gross loans $ 47,243,000   $ 47,243,000     $ 43,625,000    
Ratio of non-performing assets to total assets 0.23%   0.23%     0.22%    
Commercial loans                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Allowance for credit losses on loans $ 129,440,000 125,444,000 $ 129,440,000 125,444,000 127,837,000 $ 125,375,000 119,207,000 109,923,000
Gross loans $ 9,106,457,000   $ 9,106,457,000     $ 8,316,591,000    
% based on $, past due 0.24%   0.24%     0.05%    
Commercial loans | Financial Asset Originated                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Non-accrual loans $ 13,884,000   $ 13,884,000     $ 11,723,000    
Commercial loans | Commercial & industrial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Allowance for credit losses on loans 53,903,000 $ 47,794,000 53,903,000 $ 47,794,000 $ 47,231,000 45,957,000 $ 44,317,000 $ 38,665,000
Gross loans $ 2,497,008,000   $ 2,497,008,000     $ 2,303,927,000    
% based on $, past due 0.62%   0.62%     0.01%    
Commercial loans | Commercial & industrial | Financial Asset Originated                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Non-accrual loans $ 4,789,000   $ 4,789,000     $ 365,000    
Commercial loans | Commercial & industrial | SBA Payroll Protection Program, CARES Act                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Allowance for credit losses on loans 0   0     0    
Loans receivable, net of allowance for loan losses $ 109,746,000   $ 109,746,000     $ 305,162,000