| Standard label: | Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable |
| Name: | us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions |
| Documentation: | The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. |
| Object type: | cm:Concept |
| Data type: | Shares (xbrli:sharesItemType) |
| Period type: | As Of (instant) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions |
| Label | Role | Language |
| Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable | http://www.xbrl.org/2003/role/label | en-US |
| Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable, Ending Balance | http://www.xbrl.org/2003/role/periodEndLabel | en-US |
| Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable, Beginning Balance | http://www.xbrl.org/2003/role/periodStartLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 718 10 50 2 (c)(iii) | http://fasb.org/us-gaap/role/ref/legacyRef | 718 |