SEGMENT INFORMATION - Summary of Net Sales by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 221,744	$ 146,160	$ 448,843	$ 346,687
Operating income	9,414	(1,746)	21,553	(57,314)
Impairment of goodwill and other long-lived assets	0	0	0	61,109
Operating Segments | Performance Materials
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	77,186	58,473	156,519	123,693
Operating income	14,853	5,443	30,149	(51,498)
Intercompany sales	1,000	300	2,100	1,200
Impairment of goodwill and other long-lived assets				61,100
Amortization of intangible assets	3,000	4,000	6,100	7,900
Operating Segments | Performance Materials | Filtration Products
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	34,066	29,636	68,412	55,523
Operating Segments | Performance Materials | Sealing and Advanced Solutions Products
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	43,120	28,837	88,107	68,170
Operating Segments | Technical Nonwovens
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	72,479	52,007	134,154	109,410
Operating income	8,765	6,684	13,869	10,497
Amortization of intangible assets	1,100	1,200	2,100	2,300
Operating Segments | Technical Nonwovens | Industrial Filtration Products
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	35,411	29,413	71,812	60,782
Operating Segments | Technical Nonwovens | Advanced Materials Products
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	37,068	22,594	62,342	48,628
Intercompany sales	3,600	1,400	7,500	6,400
Operating Segments | Thermal Acoustical Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	76,858	37,448	167,902	121,209
Operating income	(1,500)	(6,285)	174	(657)
Operating Segments | Thermal Acoustical Solutions | Parts
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	71,222	32,448	157,716	109,769
Operating Segments | Thermal Acoustical Solutions | Tooling
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	5,636	5,000	10,186	11,440
Eliminations and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	(4,779)	(1,768)	(9,732)	(7,625)
Corporate Office Expenses
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating income	$ (12,704)	$ (7,588)	$ (22,639)	$ (15,656)