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Fair Value Measurements - Schedule of Carrying Amount And Estimated Fair Value Of Financial Instruments (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
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Dec. 31, 2014
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|---|---|---|
| Carrying Value | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Loans receivable, net | $ 107,403 | $ 109,425 |
| Revolving Credit Facilities, net | 181,518 | 12,780 |
| Mortgages and notes payable, net | 3,456,609 | 3,629,998 |
| Convertible Notes, net | 681,109 | 678,190 |
| Estimated Fair Value | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Loans receivable, net | 113,495 | 115,747 |
| Revolving Credit Facilities, net | 185,212 | 15,254 |
| Mortgages and notes payable, net | 3,697,971 | 3,899,950 |
| Convertible Notes, net | $ 747,589 | $ 729,231 |