COMMITMENTS AND CONTINGENCIES (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Concentrations
Operating revenue	$ 264,233	$ 162,009	$ 187,584	$ 191,120	$ 236,758	$ 159,578	$ 204,484	$ 165,541	$ 804,946	$ 766,360	$ 601,285
Peretz Network
Concentrations
Operating revenue									72,709	59,623	47,134
Total operating revenues
Concentrations
Percentage of benchmark derived from specified source									34.00%
Operating revenue									$ 775,806
Total operating revenues | Customer concentration risk | Top ten advertisers
Concentrations
Number of top advertisers									10