| Standard label: | Payments to Acquire Notes Receivable | 
| Name: | us-gaap:PaymentsToAcquireNotesReceivable | 
| Documentation: | The cash outflow to acquire an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among myriad other features and characteristics. | 
| 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:PaymentsToAcquireNotesReceivable | 
| Label | Role | Language | 
| Payments to Acquire Notes Receivable | http://www.xbrl.org/2003/role/label | en-US | 
| Reference | Role | Topic | 
| FASB Accounting Standards Codification 230 10 45 13 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 230 | 
| Part Of Roll Up: | 
| us-gaap:PaymentsToAcquireReceivables |