Segment Information - Total Assets by Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total assets	$ 488,099	$ 358,260
Operating Segments | Performance Materials
Segment Reporting Information [Line Items]
Total assets	69,887	66,706
Operating Segments | Technical Nonwovens
Segment Reporting Information [Line Items]
Total assets	211,253	89,566
Operating Segments | Thermal/Acoustical Metals
Segment Reporting Information [Line Items]
Total assets	124,377	111,195
Operating Segments | Thermal/Acoustical Fibers
Segment Reporting Information [Line Items]
Total assets	47,407	38,881
Corporate Office Expenses
Segment Reporting Information [Line Items]
Total assets	$ 35,175	$ 51,912