| Standard label: | Restricted Cash, Asset, Statement of Financial Position [Extensible List] | 
| Name: | us-gaap:RestrictedCashAssetStatementOfFinancialPositionExtensibleList | 
| Documentation: | Indicates line item in statement of financial position that includes cash restricted to withdrawal or usage. | 
| Object type: | cm:Concept | 
| Data type: | srt-types:extensibleListItemType | 
| Period type: | As Of (instant) | 
| Balance type: | (no balance type) | 
| Abstract: | false | 
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:RestrictedCashAssetStatementOfFinancialPositionExtensibleList | 
| Label | Role | Language | 
| Restricted Cash, Asset, Statement of Financial Position [Extensible List] | http://www.xbrl.org/2003/role/label | en-US | 
| Reference | Role | Topic | 
| FASB Accounting Standards Codification 230 10 50 8 | http://fasb.org/us-gaap/role/ref/legacyRef | 230 |