Details for Selection
| Standard label: | Estimate of Cancellations |
| Name: | us-gaap:EstimateOfCancellations |
| Documentation: | Estimates of cancellations for refundable service fees, if accounted for by analogy to FASB Statement No. 48. |
| Commentary: | |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For period (duration) |
| Balance type: | Debit |
| Object class: | [Concept] |