| Standard label: | Tax Credit Carryforward, Expiration Date |
| Name: | us-gaap:TaxCreditCarryforwardExpirationDate |
| Documentation: | Expiration date of the tax credit carryforward, in CCYY-MM-DD format. |
| Object type: | cm:Concept |
| Data type: | Date (xbrli:dateItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:TaxCreditCarryforwardExpirationDate |
| Label | Role | Language |
| Tax Credit Carryforward, Expiration Date | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 740 10 50 3 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |