v3.22.4
Fair Value (Estimated Fair Value Of Financial Instruments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Sep. 30, 2022
Carrying Amount    
Assets:    
Investments securities available-for-sale $ 473,131 $ 457,908
Mortgage loans held for sale 12,549 9,661
Federal Home Loan Bank stock 222,415 212,290
Cash collateral received from or held by counterparty 36,202 26,045
Liabilities:    
Borrowed funds 4,987,287 4,793,221
Carrying Amount | Checking Accounts    
Liabilities:    
Deposits 2,846,894 3,056,506
Carrying Amount | Certificates of Deposit    
Liabilities:    
Deposits 6,167,401 5,864,511
Carrying Amount | Borrowers' Advances for insurance and Taxes    
Liabilities:    
Other Liabilities 109,070 117,250
Carrying Amount | Principal, Interest, And Escrow Owed On Loans Serviced    
Liabilities:    
Other Liabilities 28,500 29,913
Carrying Amount | Forward Commitments For Sale Of Mortgage Loans    
Liabilities:    
Derivative Liability 29 333
Carrying Amount | Cash and Due From Banks    
Assets:    
Cash and Cash Equivalents 31,515 18,961
Carrying Amount | Interest Earning Cash Equivalents    
Assets:    
Cash and Cash Equivalents 412,066 350,603
Carrying Amount | Total real estate loans    
Assets:    
Loans, net 14,470,014 14,253,804
Carrying Amount | Other Loans    
Assets:    
Loans, net 3,481 3,263
Carrying Amount | Accrued Interest Receivable    
Assets:    
Accrued interest receivable 45,317 40,256
Investments securities available-for-sale 473,131 457,908
Mortgage loans held for sale 12,549 9,661
Federal Home Loan Bank stock 222,415 212,290
Cash collateral received from or held by counterparty 36,202 26,045
Liabilities:    
Borrowed funds 4,936,724 4,734,377
Checking Accounts    
Liabilities:    
Deposits 2,846,894 3,056,506
Certificates of Deposit    
Liabilities:    
Deposits 6,063,239 5,733,418
Borrowers' Advances for insurance and Taxes    
Liabilities:    
Other Liabilities 109,070 117,250
Principal, Interest, And Escrow Owed On Loans Serviced    
Liabilities:    
Other Liabilities 28,500 29,913
Forward Commitments For Sale Of Mortgage Loans    
Liabilities:    
Derivative Liability 29 333
Cash and Due From Banks    
Assets:    
Cash and Cash Equivalents 31,515 18,961
Interest Earning Cash Equivalents    
Assets:    
Cash and Cash Equivalents 412,066 350,603
Total real estate loans    
Assets:    
Loans, net 13,393,127 13,106,346
Other Loans    
Assets:    
Loans, net 3,481 3,263
Accrued Interest Receivable    
Assets:    
Accrued interest receivable 45,317 40,256
Fair Value, Inputs, Level 1    
Assets:    
Investments securities available-for-sale 0 0
Mortgage loans held for sale 0 0
Cash collateral received from or held by counterparty 36,202 26,045
Liabilities:    
Borrowed funds 0 0
Fair Value, Inputs, Level 1 | Checking Accounts    
Liabilities:    
Deposits 0 0
Fair Value, Inputs, Level 1 | Certificates of Deposit    
Liabilities:    
Deposits 0 0
Fair Value, Inputs, Level 1 | Borrowers' Advances for insurance and Taxes    
Liabilities:    
Other Liabilities 0 0
Fair Value, Inputs, Level 1 | Principal, Interest, And Escrow Owed On Loans Serviced    
Liabilities:    
Other Liabilities 0 0
Fair Value, Inputs, Level 1 | Forward Commitments For Sale Of Mortgage Loans    
Liabilities:    
Derivative Liability 0 0
Fair Value, Inputs, Level 1 | Cash and Due From Banks    
Assets:    
Cash and Cash Equivalents 31,515 18,961
Fair Value, Inputs, Level 1 | Interest Earning Cash Equivalents    
Assets:    
Cash and Cash Equivalents 412,066 350,603
Fair Value, Inputs, Level 1 | Total real estate loans    
Assets:    
Loans, net 0 0
Fair Value, Inputs, Level 1 | Other Loans    
Assets:    
Loans, net 0 0
Fair Value, Inputs, Level 1 | Accrued Interest Receivable    
Assets:    
Accrued interest receivable 0 0
Fair Value, Inputs, Level 2    
Assets:    
Investments securities available-for-sale 473,131 457,908
Mortgage loans held for sale 12,549 9,661
Federal Home Loan Bank stock 0 0
Cash collateral received from or held by counterparty 0 0
Liabilities:    
Borrowed funds 4,936,724 4,734,377
Fair Value, Inputs, Level 2 | Checking Accounts    
Liabilities:    
Deposits 2,846,894 3,056,506
Fair Value, Inputs, Level 2 | Certificates of Deposit    
Liabilities:    
Deposits 6,063,239 5,733,418
Fair Value, Inputs, Level 2 | Borrowers' Advances for insurance and Taxes    
Liabilities:    
Other Liabilities 109,070 117,250
Fair Value, Inputs, Level 2 | Principal, Interest, And Escrow Owed On Loans Serviced    
Liabilities:    
Other Liabilities 28,500 29,913
Fair Value, Inputs, Level 2 | Forward Commitments For Sale Of Mortgage Loans    
Liabilities:    
Derivative Liability 0 0
Fair Value, Inputs, Level 2 | Cash and Due From Banks    
Assets:    
Cash and Cash Equivalents 0 0
Fair Value, Inputs, Level 2 | Interest Earning Cash Equivalents    
Assets:    
Cash and Cash Equivalents 0 0
Fair Value, Inputs, Level 2 | Total real estate loans    
Assets:    
Loans, net 0 0
Fair Value, Inputs, Level 2 | Other Loans    
Assets:    
Loans, net 0 0
Fair Value, Inputs, Level 2 | Accrued Interest Receivable    
Assets:    
Accrued interest receivable 45,317 40,256
Fair Value, Inputs, Level 3    
Assets:    
Investments securities available-for-sale 0 0
Mortgage loans held for sale 0 0
Federal Home Loan Bank stock 0 0
Cash collateral received from or held by counterparty 0 0
Liabilities:    
Borrowed funds 0 0
Fair Value, Inputs, Level 3 | Checking Accounts    
Liabilities:    
Deposits 0 0
Fair Value, Inputs, Level 3 | Certificates of Deposit    
Liabilities:    
Deposits 0 0
Fair Value, Inputs, Level 3 | Borrowers' Advances for insurance and Taxes    
Liabilities:    
Other Liabilities 0 0
Fair Value, Inputs, Level 3 | Principal, Interest, And Escrow Owed On Loans Serviced    
Liabilities:    
Other Liabilities 0 0
Fair Value, Inputs, Level 3 | Forward Commitments For Sale Of Mortgage Loans    
Liabilities:    
Derivative Liability 29 333
Fair Value, Inputs, Level 3 | Cash and Due From Banks    
Assets:    
Cash and Cash Equivalents 0 0
Fair Value, Inputs, Level 3 | Interest Earning Cash Equivalents    
Assets:    
Cash and Cash Equivalents 0 0
Fair Value, Inputs, Level 3 | Total real estate loans    
Assets:    
Loans, net 13,393,127 13,106,346
Fair Value, Inputs, Level 3 | Other Loans    
Assets:    
Loans, net 3,481 3,263
Fair Value, Inputs, Level 3 | Accrued Interest Receivable    
Assets:    
Accrued interest receivable $ 0 $ 0