Details for Selection
| Standard label: | Realized Gain (Loss) on Investments [Table Text Block] |
| Name: | us-gaap:RealizedGainLossOnInvestmentsTableTextBlock |
| Documentation: | Tabular disclosure of realized gains and losses on investments reported in the statement of income. |
| Commentary: | |
| Data type: | Text Block (HTML) (nonnum:textBlockItemType) |
| Period type: | For period (duration) |
| Balance type: | |
| Object class: | [Text Block] |