| Standard label: | Fair Value, Inputs, Level 3 [Member] |
| Name: | us-gaap:FairValueInputsLevel3Member |
| Documentation: | Unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:FairValueInputsLevel3Member |
| Label | Role | Language |
| Fair Value, Inputs, Level 3 [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 715 20 50 1 (d)(ii) | http://www.xbrl.org/2003/role/exampleRef | 715 |
| FASB Accounting Standards Codification 715 20 50 1 (d)(iv)(01) | http://www.xbrl.org/2003/role/disclosureRef | 715 |
| FASB Accounting Standards Codification 715 20 50 1 (d)(iv)(01) | http://www.xbrl.org/2003/role/exampleRef | 715 |
| FASB Accounting Standards Codification 715 20 55 17 | http://www.xbrl.org/2003/role/exampleRef | 715 |
| FASB Accounting Standards Codification 820 10 50 2 (b) | http://www.xbrl.org/2003/role/disclosureRef | 820 |
| FASB Accounting Standards Codification 860 20 50 3 (bb)(3) | http://www.xbrl.org/2003/role/disclosureRef | 860 |