| Name | AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:monetaryItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | debit |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss (Deprecated 2018-01-31) | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:DeprecatedItems | parent-child | http://fasb.org/us-gaap/role/deprecated/deprecated | |
us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss | dep-concept-deprecatedConcept | http://fasb.org/us-gaap/role/deprecated/deprecated |