| Standard label: | Derivative Asset |
| Name: | us-gaap:DerivativeAssets |
| Documentation: | Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. |
| 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:DerivativeAssets |
| Label | Role | Language |
| Derivative Asset | http://www.xbrl.org/2003/role/label | en-US |
| Derivative Asset, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 20 50 3 (c) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| FASB Accounting Standards Codification 210 20 55 10 | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| FASB Accounting Standards Codification 825 10 50 10 | http://www.xbrl.org/2003/role/disclosureRef | 825 |
| Part Of Roll Up: |
| us-gaap:AssetsFairValueDisclosure |