| Standard label: | Fair Value, Equity, Level 2 to Level 1 Transfers, Amount |
| Name: | us-gaap:FairValueEquityLevel2ToLevel1TransfersAmount |
| Documentation: | Amount of transfers of financial instruments classified in shareholders' equity measured on a recurring basis out of level 2 of the fair value hierarchy into level 1. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:FairValueEquityLevel2ToLevel1TransfersAmount |
| Label | Role | Language |
| Fair Value, Equity, Level 2 to Level 1 Transfers, Amount | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 820 10 50 2 (bb) | http://fasb.org/us-gaap/role/ref/legacyRef | 820 |