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Investments	6 Months Ended
Investments	Jun. 30, 2012
Equity Method Investments and Joint Ventures [Abstract]
Investments	Investments Long Term Restricted Investments Restricted investments relate to reimbursement obligations under letters of credit issued for the benefit of lessors of office space. As of June 30, 2012 and December 31, 2011, our Long-term restricted investments were $3,973.