Revenue - Summary of Disaggregated Information Pertaining to Net Sales (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Net sales	$ 232,515	$ 209,855	$ 696,701	$ 636,806
Product [Member]
Disaggregation Of Revenue [Line Items]
Net sales	232,515	209,855	696,701	636,806
Composite Fibers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	127,704	139,176	389,002	423,707
Composite Fibers [Member] \| Europe, Middle East and Africa [Member]
Disaggregation Of Revenue [Line Items]
Net sales	77,012	87,870	234,928	274,442
Composite Fibers [Member] \| Americas [Member]
Disaggregation Of Revenue [Line Items]
Net sales	33,179	30,205	98,783	83,245
Composite Fibers [Member] \| Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Net sales	17,513	21,101	55,291	66,020
Composite Fibers [Member] \| Food & Beverage [Member]
Disaggregation Of Revenue [Line Items]
Net sales	66,637	68,534	208,480	209,117
Composite Fibers [Member] \| Wallcovering [Member]
Disaggregation Of Revenue [Line Items]
Net sales	20,673	26,135	62,181	82,056
Composite Fibers [Member] \| Technical Specialties [Member]
Disaggregation Of Revenue [Line Items]
Net sales	20,301	20,615	58,855	63,182
Composite Fibers [Member] \| Composite Laminates [Member]
Disaggregation Of Revenue [Line Items]
Net sales	8,859	10,544	26,552	28,902
Composite Fibers [Member] \| Metallized [Member]
Disaggregation Of Revenue [Line Items]
Net sales	11,234	13,348	32,934	40,450
Airlaid Materials [Member]
Disaggregation Of Revenue [Line Items]
Net sales	104,811	70,679	307,699	213,099
Airlaid Materials [Member] \| Europe, Middle East and Africa [Member]
Disaggregation Of Revenue [Line Items]
Net sales	58,279	35,283	167,924	107,416
Airlaid Materials [Member] \| Americas [Member]
Disaggregation Of Revenue [Line Items]
Net sales	45,039	34,899	134,634	104,027
Airlaid Materials [Member] \| Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,493	497	5,141	1,656
Airlaid Materials [Member] \| Feminine Hygiene [Member]
Disaggregation Of Revenue [Line Items]
Net sales	52,159	46,054	158,998	141,464
Airlaid Materials [Member] \| Specialty Wipes [Member]
Disaggregation Of Revenue [Line Items]
Net sales	17,994	11,104	52,982	29,366
Airlaid Materials [Member] \| Table Top [Member]
Disaggregation Of Revenue [Line Items]
Net sales	19,179	2,091	48,857	6,335
Airlaid Materials [Member] \| Adult Incontinence [Member]
Disaggregation Of Revenue [Line Items]
Net sales	5,855	5,036	17,708	14,658
Airlaid Materials [Member] \| Home Care [Member]
Disaggregation Of Revenue [Line Items]
Net sales	4,857	4,009	13,173	11,911
Airlaid Materials [Member] \| Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 4,767	$ 2,385	$ 15,981	$ 9,365