| Standard label: | Concentration Risk Benchmark [Axis] |
| Name: | us-gaap:ConcentrationRiskByBenchmarkAxis |
| Documentation: | Information by benchmark of concentration risk. |
| Object type: | cm:Axis |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ConcentrationRiskByBenchmarkAxis |
| Label | Role | Language |
| Concentration Risk Benchmark [Axis] | 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 |
| FASB Accounting Standards Codification 944 825 50 1B | http://www.xbrl.org/2003/role/disclosureRef | 944 |