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Redeemable Noncontrolling Interests And Subsidiary Acquisitions (Tables)
6 Months Ended
Jun. 30, 2013
Business Acquisition, Entity Acquired and Reason for Acquisition [Abstract]  
Redeemable Noncontrolling Interests
 
June 30,
 
December 31,
 
2013
 
2012
Stock options and other outstanding redeemable stock
$
7,817

 
$
4,938