Senior Notes Payable and Other Debt (Details 1) (USD $) In Thousands | Sep. 30, 2011 | Dec. 31, 2010 | |||
|---|---|---|---|---|---|
| Scheduled maturities of borrowing arrangements and other provisions excluding capital lease obligations [Abstract] | |||||
| 2011 | $ 243,498 | ||||
| 2012 | 1,042,260 | ||||
| 2013 | 916,733 | ||||
| 2014 | 260,889 | ||||
| 2015 | 868,295 | ||||
| Thereafter | 2,734,181 | ||||
| Total maturities | 6,065,856 | 2,926,954 | |||
Principal Amount Due at Maturity [Member] | |||||
| Scheduled maturities of borrowing arrangements and other provisions excluding capital lease obligations [Abstract] | |||||
| 2011 | 230,700 | ||||
| 2012 | 517,913 | ||||
| 2013 | 872,623 | ||||
| 2014 | 220,891 | ||||
| 2015 | 835,792 | ||||
| Thereafter | 2,539,451 | ||||
| Total maturities | 5,217,370 | ||||
Unsecured Revolving Credit Facilities [Member] | |||||
| Scheduled maturities of borrowing arrangements and other provisions excluding capital lease obligations [Abstract] | |||||
| 2011 | 0 | [1] | |||
| 2012 | 474,000 | [1] | |||
| 2013 | 0 | [1] | |||
| 2014 | 0 | [1] | |||
| 2015 | 0 | [1] | |||
| Thereafter | 0 | [1] | |||
| Total maturities | 474,000 | [1] | |||
Scheduled Periodic Amortization [Member] | |||||
| Scheduled maturities of borrowing arrangements and other provisions excluding capital lease obligations [Abstract] | |||||
| 2011 | 12,798 | ||||
| 2012 | 50,347 | ||||
| 2013 | 44,110 | ||||
| 2014 | 39,998 | ||||
| 2015 | 32,503 | ||||
| Thereafter | 194,730 | ||||
| Total maturities | $ 374,486 | ||||
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