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Real Estate - Commitments (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 properties
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Commitments and Contingencies Disclosure [Abstract] |  |
Real estate investment, number of properties | 47 |
Real estate held-for-sale, number of properties | 2 |
Real estate, number of properties | 49 |
Real estate investment, funding commitments | $ 148,662 | [1]
Real estate held-for-sale, funding commitments | 1,662 | [1]
Real estate, funding commitments | 150,324 | [1]
Real estate investment, amount funded | 112,387 |
Real estate held-for-sale, amount funded | 947 |
Real estate, amount funded | 113,334 |
Real estate investment, remaining commitment | 36,275 |
Real estate held-for-sale, remaining commitment | 715 |
Real estate, remaining commitment | $ 36,990 |
[1] | Includes land, construction costs and tenant improvements.

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