|
Unconsolidated Investees (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Summary of investments | ||
| Investments in and advances to unconsolidated investees | $ 2,857,755 | $ 2,024,661 |
|
Property Funds [Member]
|
||
| Summary of investments | ||
| Investments in and advances to unconsolidated investees | 2,471,179 | 1,890,016 |
|
Other Investees [Member]
|
||
| Summary of investments | ||
| Investments in and advances to unconsolidated investees | $ 386,576 | $ 134,645 |