Details for Selection
| Standard label: | Schedule of Nonvested Performance-based Units Activity [Table Text Block] |
| Name: | us-gaap:ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock |
| Documentation: | Tabular disclosure of the changes in outstanding nonvested performance-based units. |
| Commentary: | |
| Data type: | Text Block (HTML) (nonnum:textBlockItemType) |
| Period type: | For period (duration) |
| Balance type: | |
| Object class: | [Text Block] |