Revenue from Contracts with Customers - Disaggregation of Revenue by Geographical Location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 186,413	$ 174,879	$ 378,073	$ 340,366
North America
Disaggregation of Revenue [Line Items]
Net sales	121,832		242,279
Europe
Disaggregation of Revenue [Line Items]
Net sales	52,754		111,542
Asia
Disaggregation of Revenue [Line Items]
Net sales	11,827		24,252
Operating Segments | Performance Materials
Disaggregation of Revenue [Line Items]
Net sales	31,234	29,301	61,927	58,052
Operating Segments | Performance Materials | North America
Disaggregation of Revenue [Line Items]
Net sales	20,879		40,040
Operating Segments | Performance Materials | Europe
Disaggregation of Revenue [Line Items]
Net sales	10,355		21,887
Operating Segments | Performance Materials | Asia
Disaggregation of Revenue [Line Items]
Net sales	0		0
Operating Segments | Technical Nonwovens
Disaggregation of Revenue [Line Items]
Net sales	71,712	67,098	139,253	126,016
Operating Segments | Technical Nonwovens | North America
Disaggregation of Revenue [Line Items]
Net sales	45,564		84,697
Operating Segments | Technical Nonwovens | Europe
Disaggregation of Revenue [Line Items]
Net sales	18,053		37,439
Operating Segments | Technical Nonwovens | Asia
Disaggregation of Revenue [Line Items]
Net sales	8,095		17,117
Operating Segments | Thermal Acoustical Solutions
Disaggregation of Revenue [Line Items]
Net sales	90,169	86,002	191,606	170,787
Operating Segments | Thermal Acoustical Solutions | North America
Disaggregation of Revenue [Line Items]
Net sales	61,922		131,901
Operating Segments | Thermal Acoustical Solutions | Europe
Disaggregation of Revenue [Line Items]
Net sales	24,515		52,570
Operating Segments | Thermal Acoustical Solutions | Asia
Disaggregation of Revenue [Line Items]
Net sales	3,732		7,135
Eliminations and Other
Disaggregation of Revenue [Line Items]
Net sales	(6,702)	$ (7,522)	(14,713)	$ (14,489)
Eliminations and Other | North America
Disaggregation of Revenue [Line Items]
Net sales	(6,533)		(14,359)
Eliminations and Other | Europe
Disaggregation of Revenue [Line Items]
Net sales	(169)		(354)
Eliminations and Other | Asia
Disaggregation of Revenue [Line Items]
Net sales	$ 0		$ 0