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RESTRUCTURING INITIATIVES - Business Transformation Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring reserve
Restructuring reserve, balance at the beginning of the period			$ 10,489
Net Charges	$ 10,223	$ 3,415	18,771	$ 15,585
Cash Paid			(25,623)
Interest and FX Impact			(225)
Restructuring reserve, balance at the end of the period	3,412		3,412
Employee severance
Restructuring reserve
Restructuring reserve, balance at the beginning of the period			7,956
Net Charges			293
Cash Paid			(5,506)
Interest and FX Impact			(179)
Restructuring reserve, balance at the end of the period	2,564		2,564
Professional fees and other costs
Restructuring reserve
Restructuring reserve, balance at the beginning of the period			2,533
Net Charges			18,478
Cash Paid			(20,117)
Interest and FX Impact			(46)
Restructuring reserve, balance at the end of the period	$ 848		$ 848