INTANGIBLE ASSETS AND GOODWILL (Goodwill) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2016
Goodwill [Roll Forward]
Balance, beginning of year		$ 3,375,000	$ 3,326,474
Acquisitions		0	74,584
Impairment of goodwill		940,700	0	$ 0
Currency translation adjustments		(37,394)	(26,058)
Balance, end of year		2,396,906	3,375,000	3,326,474
OpenTable
Goodwill [Line Items]
Reporting Unit, Amount of Carrying Value					$ 580,100
Goodwill [Roll Forward]
Balance, beginning of year	[1]		$ 1,500,000
Impairment of goodwill		$ 940,700
Balance, end of year	[1]			$ 1,500,000

[1] Goodwill is not tax deductible.