| Standard label: | Concentration Risk Type [Domain] |
| Name: | us-gaap:ConcentrationRiskTypeDomain |
| Documentation: | For an entity that discloses a concentration risk as a percentage of some financial balance or benchmark, identifies the type (for example, asset, liability, net assets, geographic, customer, employees, supplier, lender) of the concentration. |
| 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:ConcentrationRiskTypeDomain |
| Label | Role | Language |
| Concentration Risk Type [Domain] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 275 10 50 18 | http://fasb.org/us-gaap/role/ref/legacyRef | 275 |
| FASB Accounting Standards Codification 275 10 50 20 | http://fasb.org/us-gaap/role/ref/legacyRef | 275 |
| FASB Accounting Standards Codification 825 10 50 20 | http://fasb.org/us-gaap/role/ref/legacyRef | 825 |
| FASB Accounting Standards Codification 825 10 50 21 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 825 |