| Income (Loss) before Gain (Loss) on Sale of Properties (Deprecated 2020-01-31) | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Income (Loss) before Gain (Loss) on Sale of Properties, Total (Deprecated 2020-01-31) | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Amount of income (loss) before gain (loss) on sale of properties of Real Estate Investment Trust (REIT). | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |