| Standard label: | Payments for (Proceeds from) Delayed Tax Exempt Exchange |
| Name: | us-gaap:PaymentsForProceedsFromDelayedTaxExemptExchange |
| Documentation: | Net cash outflow or inflow from a property which is traded for the promise to provide a replacement like-kind property in the near future also known as tax deferred exempt exchange. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PaymentsForProceedsFromDelayedTaxExemptExchange |
| Label | Role | Language |
| Payments for (Proceeds from) Delayed Tax Exempt Exchange | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 235 10 S99 3 (SX 210.12-04(a)) | http://www.xbrl.org/2009/role/commonPracticeRef | 235 |