STOCK-BASED EMPLOYEE COMPENSATION (Schedule of Assumed Stock Options) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended	5 Months Ended	7 Months Ended
	Dec. 31, 2013	May 21, 2013 KAYAK [Member]	Dec. 31, 2013 KAYAK [Member]
Number of Shares
Beginning balance (in shares)			540,179
Exercised (in shares)	(62,001)		(387,669)
Forfeited (in shares)			(23,802)
Ending balance (in shares)	9,000	540,179	128,708
Weighted Average Exercise Price
Beginning balance (in dollars per share)			$ 260.96
Exercised (in dollars per share)	$ 19.32		$ 222.73
Forfeited (in dollars per share)			$ 478.83
Ending balance (in dollars per share)	$ 22.55	$ 260.96	$ 335.83
Aggregate Intrinsic Value	$ 10,300	$ 314,133	$ 106,386
Weighted Average Remaining Contractual Term		6 years 9 months	6 years 11 months
Vested and exercisable as of December 31, 2013
Number of Shares			86,340
Weighted Average Exercise Price (in dollars per share)			$ 261.71
Aggregate Intrinsic Value			77,765
Weighted Average Remaining Contractual Term			6 years 2 months
Vested and exercisable as of December 31, 2013 and expected to vest thereafter, net of estimated forfeitures
Number of Shares			126,428
Weighted Average Exercise Price (in dollars per share)			$ 332.64
Aggregate Intrinsic Value			$ 104,905
Weighted Average Remaining Contractual Term			6 years 11 months