Segment Information - Summary (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 207,085		$ 205,274	$ 553,772	$ 644,110
Operating income	(9,281)		7,447	(66,595)	29,676
Impairment of goodwill and other long-lived assets	0	$ 61,109	0	61,109	0
Restructuring expenses	14,984		0	14,984	0
Performance Materials
Segment Reporting, Revenue Reconciling Item [Line Items]
Impairment of goodwill and other long-lived assets		61,109
Technical Nonwovens
Segment Reporting, Revenue Reconciling Item [Line Items]
Impairment of goodwill and other long-lived assets		0
Thermal Acoustical Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Impairment of goodwill and other long-lived assets		$ 0
Operating Segments | Performance Materials
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	67,817		60,000	191,510	189,682
Operating income	(6,759)		712	(58,257)	5,474
Impairment of goodwill and other long-lived assets				61,100
Restructuring expenses	14,800			14,800
Amortization of intangible assets	4,000		4,100	11,900	12,200
Operating Segments | Performance Materials | Filtration
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	30,899		22,427	86,422	71,093
Operating Segments | Performance Materials | Sealing and Advanced Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	36,918		37,573	105,088	118,589
Operating Segments | Technical Nonwovens
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	58,509		63,912	167,919	198,596
Operating income	5,061		7,165	15,558	19,743
Amortization of intangible assets	1,200		1,300	3,500	3,800
Operating Segments | Technical Nonwovens | Industrial Filtration
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	29,643		32,935	90,425	114,005
Operating Segments | Technical Nonwovens | Advanced Materials
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	28,866		30,977	77,494	84,591
Intercompany sales	3,900		4,300	10,200	13,600
Operating Segments | Thermal Acoustical Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	85,523		87,926	206,732	275,511
Operating income	1,174		5,022	517	21,870
Operating Segments | Thermal Acoustical Solutions | Parts
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	79,687		80,309	189,456	250,591
Operating Segments | Thermal Acoustical Solutions | Tooling
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	5,836		7,617	17,276	24,920
Eliminations and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	(4,764)		(6,564)	(12,389)	(19,679)
Corporate Office Expenses
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating income	(8,757)		$ (5,452)	(24,413)	$ (17,411)
Restructuring expenses	$ 200			$ 200