RESTRUCTURING - Charges by Cost (Details) - Technical Nonwovens - USD ($) $ in Thousands	12 Months Ended			39 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Total pre-tax expense incurred	$ 15,903	$ 767	$ 2,297	$ 18,967
Severance and Related Expenses
Restructuring Cost and Reserve [Line Items]
Total pre-tax expense incurred	10,097	145	606	10,848
Facility Exit and Asset Write-Off Expenses
Restructuring Cost and Reserve [Line Items]
Total pre-tax expense incurred	$ 5,806	$ 622	$ 1,691	$ 8,119