| Amount, before accumulated depreciation, of real estate investment by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. Excludes real estate not held as investment or interest. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross, Total | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross, Beginning Balance | en-US | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross, Ending Balance | en-US | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |