| Standard label: | Proceeds from Advances for Construction |
| Name: | us-gaap:ProceedsFromAdvancesForConstruction |
| Documentation: | The cash inflow from borrowing by the entity from developers, builders, government agencies and municipalities for construction that are repaid in cash, generally on a straight-line basis over periods ranging from five to forty years. |
| 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:ProceedsFromAdvancesForConstruction |
| Label | Role | Language |
| Proceeds from Advances for Construction | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 230 10 45 12 | http://fasb.org/us-gaap/role/ref/legacyRef | 230 |
| Part Of Roll Up: |
| us-gaap:NetCashProvidedByUsedInInvestingActivitiesContinuingOperations |