Segment Information - Net Sales By Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 209,938	$ 197,886	$ 186,413	$ 191,660	$ 178,030	$ 180,041	$ 174,879	$ 165,487	$ 785,897	$ 698,437	$ 566,852
Operating Segments | Performance Materials Segment
Segment Reporting Information [Line Items]
Net sales									169,217	116,669	111,128
Operating Segments | Performance Materials Segment | Filtration
Segment Reporting Information [Line Items]
Net sales									93,089	87,173	83,345
Operating Segments | Performance Materials Segment | Sealing and Advanced Solutions
Segment Reporting Information [Line Items]
Net sales									76,128	29,496	27,783
Operating Segments | Technical Nonwovens Segment
Segment Reporting Information [Line Items]
Net sales									277,071	269,077	155,505
Operating Segments | Technical Nonwovens Segment | Industrial Filtration
Segment Reporting Information [Line Items]
Net sales									157,606	147,087	90,415
Operating Segments | Technical Nonwovens Segment | Advanced Materials
Segment Reporting Information [Line Items]
Net sales									119,465	121,990	65,090
Operating Segments | Thermal Acoustical Solutions Segment
Segment Reporting Information [Line Items]
Net sales									365,427	342,105	321,192
Operating Segments | Thermal Acoustical Solutions Segment | Parts
Segment Reporting Information [Line Items]
Net sales									328,057	318,217	298,016
Operating Segments | Thermal Acoustical Solutions Segment | Tooling
Segment Reporting Information [Line Items]
Net sales									37,370	23,888	23,176
Eliminations and Other
Segment Reporting Information [Line Items]
Net sales									$ (25,818)	$ (29,414)	$ (20,973)