| Standard label: | Fair Value, Nonrecurring [Member] |
| Name: | us-gaap:FairValueMeasurementsNonrecurringMember |
| Documentation: | Infrequent fair value measurement. Includes, but is not limited to, fair value adjustment for impairment of asset, liability or equity, not frequently measured at fair value. |
| 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:FairValueMeasurementsNonrecurringMember |
| Label | Role | Language |
| Fair Value, Nonrecurring [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 820 10 50 6A | http://www.xbrl.org/2003/role/disclosureRef | 820 |
| FASB Accounting Standards Codification 820 10 50 2 (a) | http://www.xbrl.org/2003/role/disclosureRef | 820 |
| FASB Accounting Standards Codification 820 10 50 2 (b) | http://www.xbrl.org/2003/role/disclosureRef | 820 |
| FASB Accounting Standards Codification 820 10 50 2 (bbb)(1) | http://www.xbrl.org/2003/role/disclosureRef | 820 |
| FASB Accounting Standards Codification 820 10 50 2 (bbb)(2) | http://www.xbrl.org/2003/role/disclosureRef | 820 |
| FASB Accounting Standards Codification 820 10 50 2 (h) | http://www.xbrl.org/2003/role/disclosureRef | 820 |