REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue by Geographical Location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 221,744	$ 146,160	$ 448,843	$ 346,687
North America
Disaggregation of Revenue [Line Items]
Net sales	150,872	92,333	301,559	225,405
Europe
Disaggregation of Revenue [Line Items]
Net sales	55,718	43,243	115,379	100,816
Asia
Disaggregation of Revenue [Line Items]
Net sales	15,154	10,584	31,905	20,466
Operating Segments | Performance Materials
Disaggregation of Revenue [Line Items]
Net sales	77,186	58,473	156,519	123,693
Operating Segments | Performance Materials | North America
Disaggregation of Revenue [Line Items]
Net sales	58,195	40,190	117,069	86,107
Operating Segments | Performance Materials | Europe
Disaggregation of Revenue [Line Items]
Net sales	15,272	16,501	32,196	33,776
Operating Segments | Performance Materials | Asia
Disaggregation of Revenue [Line Items]
Net sales	3,719	1,782	7,254	3,810
Operating Segments | Technical Nonwovens
Disaggregation of Revenue [Line Items]
Net sales	72,479	52,007	134,154	109,410
Operating Segments | Technical Nonwovens | North America
Disaggregation of Revenue [Line Items]
Net sales	46,443	31,236	82,281	66,967
Operating Segments | Technical Nonwovens | Europe
Disaggregation of Revenue [Line Items]
Net sales	18,077	15,418	34,976	32,356
Operating Segments | Technical Nonwovens | Asia
Disaggregation of Revenue [Line Items]
Net sales	7,959	5,353	16,897	10,087
Operating Segments | Thermal Acoustical Solutions
Disaggregation of Revenue [Line Items]
Net sales	76,858	37,448	167,902	121,209
Operating Segments | Thermal Acoustical Solutions | North America
Disaggregation of Revenue [Line Items]
Net sales	50,709	22,575	111,362	79,676
Operating Segments | Thermal Acoustical Solutions | Europe
Disaggregation of Revenue [Line Items]
Net sales	22,673	11,424	48,786	34,964
Operating Segments | Thermal Acoustical Solutions | Asia
Disaggregation of Revenue [Line Items]
Net sales	3,476	3,449	7,754	6,569
Eliminations and Other
Disaggregation of Revenue [Line Items]
Net sales	(4,779)	(1,768)	(9,732)	(7,625)
Eliminations and Other | North America
Disaggregation of Revenue [Line Items]
Net sales	(4,475)	(1,668)	(9,153)	(7,345)
Eliminations and Other | Europe
Disaggregation of Revenue [Line Items]
Net sales	(304)	(100)	(579)	(280)
Eliminations and Other | Asia
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0