| Standard label: | Proceeds from Delayed Tax Exempt Exchange |
| Name: | us-gaap:ProceedsFromDelayedTaxExemptExchange |
| Documentation: | Cash inflow related to a property which is traded for the promise to provide a replacement like-kind property in the near future also known as a tax deferred exempt exchange. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ProceedsFromDelayedTaxExemptExchange |
| Label | Role | Language |
| Proceeds from Delayed Tax Exempt Exchange | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 230 10 45 12 (c) | http://fasb.org/us-gaap/role/ref/legacyRef | 230 |
| Part Of Roll Up: |
| us-gaap:ProceedsFromSaleOfProductiveAssets |