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MANDATORILY REDEEMABLE NONCONTROLLING INTEREST (ROLLFORWARD TABLE) (DETAILS) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Mandatorily redeemable noncontrolling interest [Line Items]        
Mandatorily redeemable noncontrolling interest, January 1     $ 4,131  
Net income attributable to mandatorily redeemable noncontrolling interest $ 12,542 $ 15,493 24,447 $ 35,528
Change in redemption value     (466)  
Purchase of mandatorily redeemable noncontrolling interest     (4,105)  
Iknowtion [Member]        
Mandatorily redeemable noncontrolling interest [Line Items]        
Mandatorily redeemable noncontrolling interest, January 1     4,131 2,814
Net income attributable to mandatorily redeemable noncontrolling interest       325
Working capital distributed to mandatorily redeemable noncontrolling interest     (492) (632)
Change in redemption value     466 903
Purchase of mandatorily redeemable noncontrolling interest     $ (4,105)  
Mandatorily redeemable noncontrolling interest, June 30   $ 3,410   $ 3,410