FAIR VALUE MEASUREMENTS (Details 1) (USD $)				3 Months Ended		9 Months Ended			9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2011 OkCupid	Sep. 30, 2012 Auction rate security	Sep. 30, 2011 Auction rate security	Sep. 30, 2012 Auction rate security	Sep. 30, 2011 Auction rate security	Dec. 31, 2011 Auction rate security	Sep. 30, 2012 Contingent Consideration Arrangement	Sep. 30, 2011 Contingent Consideration Arrangement	Jun. 30, 2011 Contingent Consideration Arrangement
Changes in assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance at the beginning of the period, assets				$ 6,730,000	$ 8,680,000	$ 5,870,000	$ 13,100,000
Total net gains (losses) (realized and unrealized) included in other comprehensive income, assets				600,000	(2,820,000)	1,460,000	(2,240,000)
Settlements, assets							(5,000,000)
Balance at the end of the period, assets				7,330,000	5,860,000	7,330,000	5,860,000
Changes in liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance at the beginning of the period, liabilities									(10,000,000)	0	(10,000,000)
Fair value at date of acquisition, liabilities										(40,000,000)
Settlements, liabilities									10,000,000	30,000,000
Balance at the end of the period, liabilities									0	(10,000,000)	(10,000,000)
Auction rate securities
Cost basis				10,000,000		10,000,000
Gross unrealized losses	2,000	37,000		2,700,000		2,700,000		4,100,000
Acquisition information
Fair value of contingent consideration arrangement			$ 10,000,000