Investment Securities - Weighted Average Yields for Available-for-Sale Debt Securities (Details) |
Sep. 30, 2025 |
|---|---|
| Residential mortgage-backed securities | |
| Debt Securities, Available-for-sale [Line Items] | |
| Due within one year | 0.00% |
| Due after one year through five years | 0.00% |
| Due after five years through ten years | 3.91% |
| Due after ten years | 4.71% |
| Total | 4.71% |
| Commercial mortgage-backed securities | |
| Debt Securities, Available-for-sale [Line Items] | |
| Due within one year | 0.00% |
| Due after one year through five years | 0.00% |
| Due after five years through ten years | 4.90% |
| Due after ten years | 0.00% |
| Total | 4.90% |
| Credit risk transfer securities | |
| Debt Securities, Available-for-sale [Line Items] | |
| Due within one year | 0.00% |
| Due after one year through five years | 0.00% |
| Due after five years through ten years | 4.28% |
| Due after ten years | 0.00% |
| Total | 4.28% |
| X | ||||||||||
- Definition Weighted average yield of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing after tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Weighted average yield of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Weighted average yield of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Weighted average yield of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Weighted average yield of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|