Revenue from Contracts with Customers - Disaggregation of Revenue by Geographical Location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 220,811	$ 186,413	$ 438,836	$ 378,073
North America
Disaggregation of Revenue [Line Items]
Net sales	148,258	121,832	289,158	242,279
Europe
Disaggregation of Revenue [Line Items]
Net sales	58,548	52,754	120,490	111,542
Asia
Disaggregation of Revenue [Line Items]
Net sales	14,005	11,827	29,188	24,252
Operating Segments | Performance Materials
Disaggregation of Revenue [Line Items]
Net sales	65,102	31,234	129,682	61,927
Operating Segments | Performance Materials | North America
Disaggregation of Revenue [Line Items]
Net sales	47,822	20,879	94,199	40,040
Operating Segments | Performance Materials | Europe
Disaggregation of Revenue [Line Items]
Net sales	15,729	10,355	32,386	21,887
Operating Segments | Performance Materials | Asia
Disaggregation of Revenue [Line Items]
Net sales	1,551	0	3,097	0
Operating Segments | Technical Nonwovens
Disaggregation of Revenue [Line Items]
Net sales	69,078	71,712	134,684	139,253
Operating Segments | Technical Nonwovens | North America
Disaggregation of Revenue [Line Items]
Net sales	42,667	45,564	79,856	84,697
Operating Segments | Technical Nonwovens | Europe
Disaggregation of Revenue [Line Items]
Net sales	17,791	18,053	36,840	37,439
Operating Segments | Technical Nonwovens | Asia
Disaggregation of Revenue [Line Items]
Net sales	8,620	8,095	17,988	17,117
Operating Segments | Thermal Acoustical Solutions
Disaggregation of Revenue [Line Items]
Net sales	93,272	90,169	187,585	191,606
Operating Segments | Thermal Acoustical Solutions | North America
Disaggregation of Revenue [Line Items]
Net sales	64,235	61,922	127,837	131,901
Operating Segments | Thermal Acoustical Solutions | Europe
Disaggregation of Revenue [Line Items]
Net sales	25,203	24,515	51,645	52,570
Operating Segments | Thermal Acoustical Solutions | Asia
Disaggregation of Revenue [Line Items]
Net sales	3,834	3,732	8,103	7,135
Eliminations and Other
Disaggregation of Revenue [Line Items]
Net sales	(6,641)	(6,702)	(13,115)	(14,713)
Eliminations and Other | North America
Disaggregation of Revenue [Line Items]
Net sales	(6,466)	(6,533)	(12,734)	(14,359)
Eliminations and Other | Europe
Disaggregation of Revenue [Line Items]
Net sales	(175)	(169)	(381)	(354)
Eliminations and Other | Asia
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0