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Commitments and Contingencies | 6 Months Ended
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Jun. 30, 2012
Commitments and Contingencies Disclosure [Abstract] |
Commitments and Contingencies | Commitments and Contingencies At June 30, 2012, we had contractual obligations that expire at various dates through 2022 to invest up to an additional $62.2 million in alternative and other investments. There is no certainty that any such additional investment will be required.

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