REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue by Geographical Location (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 764,041	$ 837,398	$ 785,897
North America
Disaggregation of Revenue [Line Items]
Net sales	494,475	555,256	509,844
Europe
Disaggregation of Revenue [Line Items]
Net sales	220,502	227,848	221,799
Asia
Disaggregation of Revenue [Line Items]
Net sales	49,064	54,294	54,254
Operating Segments | Performance Materials
Disaggregation of Revenue [Line Items]
Net sales	264,645	245,480	169,217
Operating Segments | Performance Materials | North America
Disaggregation of Revenue [Line Items]
Net sales	181,741	176,094	117,313
Operating Segments | Performance Materials | Europe
Disaggregation of Revenue [Line Items]
Net sales	73,378	61,889	49,055
Operating Segments | Performance Materials | Asia
Disaggregation of Revenue [Line Items]
Net sales	9,526	7,497	2,849
Operating Segments | Technical Nonwovens
Disaggregation of Revenue [Line Items]
Net sales	222,340	255,346	277,071
Operating Segments | Technical Nonwovens | North America
Disaggregation of Revenue [Line Items]
Net sales	134,509	157,579	167,519
Operating Segments | Technical Nonwovens | Europe
Disaggregation of Revenue [Line Items]
Net sales	64,624	68,456	73,912
Operating Segments | Technical Nonwovens | Asia
Disaggregation of Revenue [Line Items]
Net sales	23,207	29,311	35,640
Operating Segments | Thermal Acoustical Solutions
Disaggregation of Revenue [Line Items]
Net sales	294,807	361,577	365,427
Operating Segments | Thermal Acoustical Solutions | North America
Disaggregation of Revenue [Line Items]
Net sales	195,223	245,870	250,133
Operating Segments | Thermal Acoustical Solutions | Europe
Disaggregation of Revenue [Line Items]
Net sales	83,253	98,221	99,529
Operating Segments | Thermal Acoustical Solutions | Asia
Disaggregation of Revenue [Line Items]
Net sales	16,331	17,486	15,765
Eliminations and Other
Disaggregation of Revenue [Line Items]
Net sales	(17,751)	(25,005)	(25,818)
Eliminations and Other | North America
Disaggregation of Revenue [Line Items]
Net sales	(16,998)	(24,287)	(25,121)
Eliminations and Other | Europe
Disaggregation of Revenue [Line Items]
Net sales	(753)	(718)	(697)
Eliminations and Other | Asia
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0	$ 0