ACCUMULATED OTHER COMPREHENSIVE INCOME - Changes in Accumulated Other Comprehensive Income by Component (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Accumulated other comprehensive income activity
Balance at the beginning of the period	$ 1,969,407
Other comprehensive (loss) income before reclassifications	(86,976)	$ (22,865)
Amounts reclassified from accumulated other comprehensive income (loss)	(1,559)	1,516
Net current-period other comprehensive (loss) income	(88,535)	(21,349)
Balance at the end of the period	1,934,111
Accumulated Other Comprehensive Income/(Loss)
Accumulated other comprehensive income activity
Balance at the beginning of the period	(316,041)	(281,709)
Balance at the end of the period	(404,576)	(303,058)
Foreign Currency
Accumulated other comprehensive income activity
Balance at the beginning of the period	(249,500)	(178,025)
Other comprehensive (loss) income before reclassifications	(91,111)	(27,373)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Net current-period other comprehensive (loss) income	(91,111)	(27,373)
Balance at the end of the period	(340,611)	(205,398)
Defined Benefit Pension Plans
Accumulated other comprehensive income activity
Balance at the beginning of the period	(66,486)	(102,322)
Other comprehensive (loss) income before reclassifications	(750)	442
Amounts reclassified from accumulated other comprehensive income (loss)	3,205	4,773
Net current-period other comprehensive (loss) income	2,455	5,215
Balance at the end of the period	(64,031)	(97,107)
Derivatives
Accumulated other comprehensive income activity
Balance at the beginning of the period	(55)	(1,362)
Other comprehensive (loss) income before reclassifications	4,885	4,066
Amounts reclassified from accumulated other comprehensive income (loss)	(4,764)	(3,257)
Net current-period other comprehensive (loss) income	121	809
Balance at the end of the period	$ 66	$ (553)