| Gewerbeimmobilien in Verwertung [Mitglied] | de | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Commercial real estate in exploitation [member] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Immeuble commercial en exploitation [membre] | fr | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Commercieel vastgoed in exploitatie [member] | nl | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Gewerbeimmobilien in Verwertung | de | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Commercial real estate in exploitation | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Immeuble commercial en exploitation | fr | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Commercieel vastgoed in exploitatie | nl | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Commercial real estate in exploitation | en | http://www.nltaxonomie.nl/2016/labelrole/domainSpecificTerseLabel | http://www.xbrl.org/2003/role/link |
| Niet-DAEB vastgoed in exploitatie | nl | http://www.nltaxonomie.nl/2016/labelrole/domainSpecificTerseLabel | http://www.xbrl.org/2003/role/link |