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Commitments and Contingencies
9 Months Ended
Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies
Commitments and Contingencies
At September 30, 2012, we had contractual obligations that expire at various dates through 2022 to invest up to an additional $64.8 million in alternative and other investments. There is no certainty that any such additional investment will be required.