Revenue - Summary of Disaggregated Information Pertaining to Net Sales (Detail) - 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	$ 235,053	$ 215,742	$ 464,186	$ 426,949
Product [Member]
Disaggregation Of Revenue [Line Items]
Net sales	235,053	215,742	464,186	426,949
Composite Fibers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	132,581	142,934	261,298	284,531
Composite Fibers [Member] \| Europe, Middle East and Africa [Member]
Disaggregation Of Revenue [Line Items]
Net sales	80,002	91,790	157,916	186,572
Composite Fibers [Member] \| Americas [Member]
Disaggregation Of Revenue [Line Items]
Net sales	33,964	28,992	65,604	53,040
Composite Fibers [Member] \| Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Net sales	18,615	22,152	37,778	44,919
Composite Fibers [Member] \| Food & Beverage [Member]
Disaggregation Of Revenue [Line Items]
Net sales	70,390	70,186	141,843	140,583
Composite Fibers [Member] \| Wallcovering [Member]
Disaggregation Of Revenue [Line Items]
Net sales	22,958	27,789	41,508	55,921
Composite Fibers [Member] \| Technical Specialties [Member]
Disaggregation Of Revenue [Line Items]
Net sales	19,266	21,609	38,554	42,567
Composite Fibers [Member] \| Composite Laminates [Member]
Disaggregation Of Revenue [Line Items]
Net sales	9,218	8,960	17,693	18,358
Composite Fibers [Member] \| Metallized [Member]
Disaggregation Of Revenue [Line Items]
Net sales	10,749	14,390	21,700	27,102
Advanced Airlaid Materials [Member]
Disaggregation Of Revenue [Line Items]
Net sales	102,472	72,808	202,888	142,418
Advanced Airlaid Materials [Member] \| Europe, Middle East and Africa [Member]
Disaggregation Of Revenue [Line Items]
Net sales	55,206	35,905	109,645	72,133
Advanced Airlaid Materials [Member] \| Americas [Member]
Disaggregation Of Revenue [Line Items]
Net sales	45,261	36,310	89,595	69,128
Advanced Airlaid Materials [Member] \| Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Net sales	2,005	593	3,648	1,157
Advanced Airlaid Materials [Member] \| Feminine Hygiene [Member]
Disaggregation Of Revenue [Line Items]
Net sales	51,851	46,937	106,839	95,410
Advanced Airlaid Materials [Member] \| Specialty Wipes [Member]
Disaggregation Of Revenue [Line Items]
Net sales	17,656	10,495	34,988	18,262
Advanced Airlaid Materials [Member] \| Table Top [Member]
Disaggregation Of Revenue [Line Items]
Net sales	16,347	2,179	29,678	4,244
Advanced Airlaid Materials [Member] \| Adult Incontinence [Member]
Disaggregation Of Revenue [Line Items]
Net sales	6,365	5,190	11,853	9,622
Advanced Airlaid Materials [Member] \| Home Care [Member]
Disaggregation Of Revenue [Line Items]
Net sales	4,352	3,875	8,316	7,902
Advanced Airlaid Materials [Member] \| Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 5,901	$ 4,132	$ 11,214	$ 6,978