Revenue - Summary of Disaggregated Information Pertaining to Net Sales (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation Of Revenue [Line Items]
Net sales	$ 209,855	$ 210,120	$ 636,806	$ 591,035
Product [Member]
Disaggregation Of Revenue [Line Items]
Net sales	209,855	210,120	636,806	591,035
Composite Fibers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	139,176	142,349	423,707	400,590
Composite Fibers [Member] | Europe, Middle East and Africa [Member]
Disaggregation Of Revenue [Line Items]
Net sales	87,870	91,944	274,442	259,532
Composite Fibers [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Net sales	21,101	24,207	66,020	64,324
Composite Fibers [Member] | Americas [Member]
Disaggregation Of Revenue [Line Items]
Net sales	30,205	26,198	83,245	76,734
Composite Fibers [Member] | Food & Beverage [Member]
Disaggregation Of Revenue [Line Items]
Net sales	68,534	66,539	209,117	194,575
Composite Fibers [Member] | Wallcovering [Member]
Disaggregation Of Revenue [Line Items]
Net sales	26,135	28,365	82,056	76,993
Composite Fibers [Member] | Technical Specialties [Member]
Disaggregation Of Revenue [Line Items]
Net sales	20,615	21,309	63,182	56,692
Composite Fibers [Member] | Composite Laminates [Member]
Disaggregation Of Revenue [Line Items]
Net sales	10,544	10,558	28,902	28,652
Composite Fibers [Member] | Metallized [Member]
Disaggregation Of Revenue [Line Items]
Net sales	13,348	15,578	40,450	43,678
Advanced Airlaid Materials [Member]
Disaggregation Of Revenue [Line Items]
Net sales	70,679	67,771	213,099	190,445
Advanced Airlaid Materials [Member] | Europe, Middle East and Africa [Member]
Disaggregation Of Revenue [Line Items]
Net sales	35,283	36,025	107,416	98,158
Advanced Airlaid Materials [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Net sales	497	449	1,656	1,058
Advanced Airlaid Materials [Member] | Americas [Member]
Disaggregation Of Revenue [Line Items]
Net sales	34,899	31,297	104,027	91,229
Advanced Airlaid Materials [Member] | Feminine Hygiene [Member]
Disaggregation Of Revenue [Line Items]
Net sales	46,054	46,623	141,464	133,550
Advanced Airlaid Materials [Member] | Specialty Wipes [Member]
Disaggregation Of Revenue [Line Items]
Net sales	11,104	8,899	29,366	21,941
Advanced Airlaid Materials [Member] | Adult Incontinence [Member]
Disaggregation Of Revenue [Line Items]
Net sales	5,036	3,761	14,658	10,625
Advanced Airlaid Materials [Member] | Home Care [Member]
Disaggregation Of Revenue [Line Items]
Net sales	4,009	3,715	11,911	9,642
Advanced Airlaid Materials [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 4,476	$ 4,773	$ 15,700	$ 14,687