ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			$ 3,001,532				$ 3,001,532
Other comprehensive (loss)/income	$ (19,545)	$ 5,875	17,361	$ (62,275)	$ 9,793	$ (31,943)	3,691	$ (84,425)
Ending balance	3,299,439						3,299,439
Foreign currency translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(81,158)		(101,780)	(68,469)		(52,747)	(101,780)	(52,747)
Unrealized (loss)/ gain in fair value	(33,292)			(69,674)			(9,231)	(82,812)
Net loss reclassified into Loss on sale of business	23,931			0			23,931	0
Income tax benefit	3,560			12,751			121	10,167
Other comprehensive (loss)/income	(5,801)			(56,923)			14,821	(72,645)
Ending balance	(86,959)	(81,158)		(125,392)	(68,469)		(86,959)	(125,392)
Cash flow hedging instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	10,920		8,306	(9,845)		(3,417)	8,306	(3,417)
Unrealized (loss)/ gain in fair value	(8,805)			(15,222)			7,028	(72,827)
Net (gain)/ loss reclassified into Cost of revenues (exclusive of depreciation and amortization)	(8,764)			8,186			(21,248)	13,647
Net (gain)/ loss reclassified into Foreign exchange loss	(211)			112			(178)	43,940
Income tax benefit	4,036			1,572			3,268	3,460
Other comprehensive (loss)/income	(13,744)			(5,352)			(11,130)	(11,780)
Ending balance	(2,824)	10,920		(15,197)	(9,845)		(2,824)	(15,197)
Defined benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,847)		(1,847)	1,957		1,957	(1,847)	1,957
Ending balance	(1,847)	(1,847)		1,957	1,957		(1,847)	1,957
Accumulated other comprehensive loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive (loss)/income	(19,545)	$ 5,875	$ 17,361	(62,275)	$ 9,793	$ (31,943)
Ending balance	$ (91,630)			$ (138,632)			$ (91,630)	$ (138,632)