| Source | Taxonomy Implementation Guide | http://fasb.org/us-gaap/role/tin/resource |
| SourceName | Leases under Topic 842 | http://fasb.org/us-gaap/role/tin/resource |
| pdfURI | https://www.fasb.org/leases_1 | http://fasb.org/us-gaap/role/tin/resource |
| inlineURI | https://xbrl.fasb.org/ix/?doc=../impdocs/LE_TIG/inline_f2017leasesig.htm | http://fasb.org/us-gaap/role/tin/resource |
| Note | If element is not presented separately in statement of financial position, element identified in tin-part:AlternateElement is used to convey location within statement of financial position. | http://fasb.org/us-gaap/role/tin/usage |
| AlternateElement | OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList | http://fasb.org/us-gaap/role/tin/usage |
| elementCreationTaxonomyVersion | 2017 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| Publisher | FASB | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2003/role/disclosureRef |
| Topic | 842 | http://www.xbrl.org/2003/role/disclosureRef |
| SubTopic | 20 | http://www.xbrl.org/2003/role/disclosureRef |
| Section | 45 | http://www.xbrl.org/2003/role/disclosureRef |
| Paragraph | 1 | http://www.xbrl.org/2003/role/disclosureRef |
| Subparagraph | (b) | http://www.xbrl.org/2003/role/disclosureRef |
| URI | https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 | http://www.xbrl.org/2003/role/disclosureRef |