Index| Name | DebtSecuritiesHeldToMaturityMaturityRollingAfterOneThroughFiveYearsWeightedAverageYield |
|---|---|
| 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 |