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MANDATORILY REDEEMABLE NONCONTROLLING INTEREST (ROLLFORWARD TABLE) (DETAILS) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Mandatorily redeemable noncontrolling interest [Line Items]        
Mandatorily redeemable noncontrolling interest, January 1     $ 2,509  
Net income attributable to mandatorily redeemable noncontrolling interest 18,130 12,722 39,433 31,325
Working capital distributed to mandatorily redeemable noncontrolling interest (1,244) (272) (1,244) (272)
Change in redemption value     (1,730)  
Mandatorily redeemable noncontrolling interest, March 31 3,274   3,274  
Iknowtion [Member]
       
Mandatorily redeemable noncontrolling interest [Line Items]        
Mandatorily redeemable noncontrolling interest, January 1     2,509 1,067
Net income attributable to mandatorily redeemable noncontrolling interest     279 159
Change in redemption value     1,730 1,065
Mandatorily redeemable noncontrolling interest, March 31 $ 3,274 $ 2,019 $ 3,274 $ 2,019