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Investments - Summary of Total Impairment Losses Recognized (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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| Investments in and Advances to Affiliates, Schedule of Investments [Abstract] | ||||
| Real estate and intangible asset impairment | $ 10,783 | $ 1,963 | $ 37,030 | $ 5,547 |
| Write-off of lease intangibles due to lease terminations | 1,910 | 0 | 4,509 | 488 |
| Loans receivable recovery | 0 | 0 | 0 | (367) |
| Other impairment | 34 | 0 | 522 | 0 |
| Total impairment loss continuing and discontinued operations | $ 12,727 | $ 1,963 | $ 42,061 | $ 5,668 |