| Standard label: | Obligation with Joint and Several Liability Arrangement, Amount Receivable |
| Name: | us-gaap:ObligationWithJointAndSeveralLiabilityArrangementAmountReceivable |
| Documentation: | Amount of receivable from other entities recognized in the balance sheet resulting from the joint and several liability arrangement. |
| 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:ObligationWithJointAndSeveralLiabilityArrangementAmountReceivable |
| Label | Role | Language |
| Obligation with Joint and Several Liability Arrangement, Amount Receivable | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 405 40 50 1 (c) | http://fasb.org/us-gaap/role/ref/legacyRef | 405 |