ACCUMULATED OTHER COMPREHENSIVE LOSS - Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance beginning of period	$ 1,513,887	$ 1,341,551
Other comprehensive income (loss) before reclassifications	35,011
Amounts reclassified out of accumulated other comprehensive loss	3,194
Tax benefit (provision)	(4,356)
Other comprehensive income, net of tax	33,849	11,948
Balance ending of period	1,593,237	1,348,450
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance beginning of period	(177,824)
Other comprehensive income (loss) before reclassifications	6,512
Amounts reclassified out of accumulated other comprehensive loss	0
Tax benefit (provision)	0
Other comprehensive income, net of tax	6,512
Balance ending of period	(171,312)
Unrealized (Loss) Gain on Available-For-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance beginning of period	(150)
Other comprehensive income (loss) before reclassifications	(668)
Amounts reclassified out of accumulated other comprehensive loss	0
Tax benefit (provision)	140
Other comprehensive income, net of tax	(528)
Balance ending of period	(678)
Unrealized (Loss) Gain on Interest Rate Hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance beginning of period	(17,383)
Other comprehensive income (loss) before reclassifications	29,177
Amounts reclassified out of accumulated other comprehensive loss	3,194
Tax benefit (provision)	(4,496)
Other comprehensive income, net of tax	27,875
Balance ending of period	10,492
Unrealized Loss on Unfunded Pension Liability
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance beginning of period	(655)
Other comprehensive income (loss) before reclassifications	(10)
Amounts reclassified out of accumulated other comprehensive loss	0
Tax benefit (provision)	0
Other comprehensive income, net of tax	(10)
Balance ending of period	(665)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance beginning of period	(196,012)	(211,477)
Other comprehensive income, net of tax	33,849	11,948
Balance ending of period	$ (162,163)	$ (199,529)