MANDATORILY REDEEMABLE NONCONTROLLING INTEREST (ROLLFORWARD TABLE) (DETAILS) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Mandatorily redeemable noncontrolling interest [Line Items]
Mandatorily redeemable noncontrolling interest, January 1	$ 1,067
Net income attributable to mandatorily redeemable noncontrollilng interest	71,471	73,923	78,275
Dividends distributed to mandatorily redeemable noncontrolling interest	(4,183)	(2,205)	(3,548)
Transfer from permanent equity		(1,067)
Change in redemption value	(1,677)
Mandatorily redeemable noncontrolling interest, December 31	2,509	1,067
Iknowtion [Member]
Mandatorily redeemable noncontrolling interest [Line Items]
Mandatorily redeemable noncontrolling interest, January 1	1,067	0
Net income attributable to mandatorily redeemable noncontrollilng interest	482	0
Dividends distributed to mandatorily redeemable noncontrolling interest	(717)	0
Transfer from permanent equity	0	1,067
Change in redemption value	1,677	0
Mandatorily redeemable noncontrolling interest, December 31	$ 2,509	$ 1,067