| Name | DebtSecuritiesAvailableForSaleMaturityRollingWithinOneYearWeightedAverageYield |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | num:percentItemType |
| Period type | instant |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Debt Securities, Available-for-sale, Maturity, Rolling within One Year, Weighted Average Yield | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 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 rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| Publisher | SEC | http://www.xbrl.org/2009/role/commonPracticeRef |
| Name | Industry Guide | http://www.xbrl.org/2009/role/commonPracticeRef |
| Number | 3 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Section | II | http://www.xbrl.org/2009/role/commonPracticeRef |
| Paragraph | B | http://www.xbrl.org/2009/role/commonPracticeRef |