Index| Name | TrustForBenefitOfEmployeesMember |
|---|---|
| Namespace | http://fasb.org/us-gaap/2021-01-31 |
| Prefix | us-gaap |
| Data type | dtr-types:domainItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | True |
Related Parent Concepts
| Name | Relation Type | Role | |
|---|---|---|---|
 | us-gaap:RelatedPartyDomain | domain-member | http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists |
| dei:LegalEntityAxis | dimension-domain | http://fasb.org/us-gaap/role/dqc/0001 |
| us-gaap:StatementEquityComponentsAxis | dimension-domain | http://fasb.org/us-gaap/role/dqc/0001 |