Investments in Partially Owned Entities (Parentheticals) (Details) (Lexington Realty Trust [Member], USD $) In Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended | |
---|---|---|---|---|
Sep. 30, 2011 | Sep. 30, 2011 | Sep. 30, 2010 | Dec. 31, 2008 | |
Lexington Realty Trust [Member] | ||||
Gain on Stock Issuance | $ 8,308 | $ 9,760 | $ 5,998 | |
Prior Period Non Cash Impairment Charges | $ 107,882 |