Deposits (Summary Of Deposit Account Balances) (Details) - USD ($) $ in Thousands |
Dec. 31, 2022 |
Sep. 30, 2022 |
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| Deposits Liability [Line Items] | ||
| Checking accounts | $ 1,181,361 | $ 1,210,035 |
| Certificates of deposit | 6,164,106 | 5,862,274 |
| Subtotal deposits | 9,011,000 | 8,918,780 |
| Accrued interest | 3,295 | 2,237 |
| Total deposits | 9,014,295 | 8,921,017 |
| Savings Accounts, excluding MMA | ||
| Deposits Liability [Line Items] | ||
| Savings accounts | 1,302,131 | 1,364,821 |
| Money Market Funds | ||
| Deposits Liability [Line Items] | ||
| Savings accounts | $ 363,402 | $ 481,650 |
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- Definition Amount of accrued but unpaid interest on deposit liabilities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The aggregate of all domestic interest-bearing and noninterest-bearing deposit liabilities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deposits in interest-bearing transaction accounts at banks or savings and loans, that are restricted in regard to ownership and can usually only be held by individuals, nonprofit entities and governments. Negotiable order of withdrawal accounts differ from money market demand accounts as they typically have higher reserve requirements and no limit on the number of checks that can be written. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of interest bearing deposits with no stated maturity, which may include passbook and statement savings accounts and money-market deposit accounts (MMDAs). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Total amount of interest-bearing domestic deposit liabilities, which may include brokered, retail, demand, checking, notice of withdrawal, money market and other interest-bearing deposits. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of time deposit liabilities, including certificates of deposit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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