| Standard label: | Use of Estimates, Policy [Policy Text Block] |
| Name: | us-gaap:UseOfEstimates |
| Documentation: | Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles. |
| Object type: | cm:Level2TextBlock |
| Data type: | Text Block (HTML) (nonnum:textBlockItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:UseOfEstimates |
| Label | Role | Language |
| Use of Estimates, Policy [Policy Text Block] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 275 10 50 1 (b) | http://www.xbrl.org/2003/role/disclosureRef | 275 |
| FASB Accounting Standards Codification 275 10 50 1 (c) | http://www.xbrl.org/2003/role/disclosureRef | 275 |
| FASB Accounting Standards Codification 275 10 50 4 | http://fasb.org/us-gaap/role/ref/legacyRef | 275 |
| FASB Accounting Standards Codification 275 10 50 8 | http://fasb.org/us-gaap/role/ref/legacyRef | 275 |
| FASB Accounting Standards Codification 275 10 50 9 | http://fasb.org/us-gaap/role/ref/legacyRef | 275 |
| FASB Accounting Standards Codification 275 10 50 11 | http://www.xbrl.org/2003/role/disclosureRef | 275 |
| FASB Accounting Standards Codification 275 10 50 12 | http://www.xbrl.org/2003/role/disclosureRef | 275 |