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Commitments and Contingencies
6 Months Ended
Jun. 30, 2013
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies
Commitments and Contingencies
At June 30, 2013, we had contractual obligations that expire at various dates through 2026 to invest up to an additional $61.5 million in alternative and other investments. There is no certainty that all of such additional investments will be required.