Revenue - Summary of Disaggregated Information Pertaining to Net Sales (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation Of Revenue [Line Items]
Net sales	$ 406,717	$ 388,323	$ 818,792	$ 780,165
Product [Member]
Disaggregation Of Revenue [Line Items]
Net sales	405,773	387,342	816,420	778,055
Composite Fibers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	142,934	133,137	284,531	258,241
Composite Fibers [Member] | Europe, Middle East and Africa [Member]
Disaggregation Of Revenue [Line Items]
Net sales	91,790	84,041	186,572	167,588
Composite Fibers [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Net sales	22,152	21,619	44,919	40,117
Composite Fibers [Member] | Americas [Member]
Disaggregation Of Revenue [Line Items]
Net sales	28,992	27,477	53,040	50,536
Composite Fibers [Member] | Food & Beverage [Member]
Disaggregation Of Revenue [Line Items]
Net sales	70,186	65,434	140,583	128,036
Composite Fibers [Member] | Wallcovering [Member]
Disaggregation Of Revenue [Line Items]
Net sales	27,789	26,173	55,921	48,628
Composite Fibers [Member] | Technical Specialties [Member]
Disaggregation Of Revenue [Line Items]
Net sales	21,609	17,676	42,567	35,383
Composite Fibers [Member] | Composite Laminates [Member]
Disaggregation Of Revenue [Line Items]
Net sales	8,960	9,255	18,358	18,094
Composite Fibers [Member] | Metallized [Member]
Disaggregation Of Revenue [Line Items]
Net sales	14,390	14,599	27,102	28,100
Composite Fibers [Member] | Product [Member]
Disaggregation Of Revenue [Line Items]
Net sales	142,900	133,100	284,500	258,200
Advanced Airlaid Materials [Member]
Disaggregation Of Revenue [Line Items]
Net sales	72,808	62,836	142,420	122,674
Advanced Airlaid Materials [Member] | Europe, Middle East and Africa [Member]
Disaggregation Of Revenue [Line Items]
Net sales	35,905	32,404	72,133	62,133
Advanced Airlaid Materials [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Net sales	593	421	1,159	609
Advanced Airlaid Materials [Member] | Americas [Member]
Disaggregation Of Revenue [Line Items]
Net sales	36,310	30,011	69,128	59,932
Advanced Airlaid Materials [Member] | Feminine Hygiene [Member]
Disaggregation Of Revenue [Line Items]
Net sales	46,937	44,503	95,410	86,927
Advanced Airlaid Materials [Member] | Specialty Wipes [Member]
Disaggregation Of Revenue [Line Items]
Net sales	10,495	6,992	18,262	13,042
Advanced Airlaid Materials [Member] | Adult Incontinence [Member]
Disaggregation Of Revenue [Line Items]
Net sales	5,190	3,220	9,622	6,864
Advanced Airlaid Materials [Member] | Home Care [Member]
Disaggregation Of Revenue [Line Items]
Net sales	3,875	3,169	7,902	5,927
Advanced Airlaid Materials [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales	6,311	4,952	11,224	9,914
Advanced Airlaid Materials [Member] | Product [Member]
Disaggregation Of Revenue [Line Items]
Net sales	72,800	62,800	142,400	122,700
Specialty Papers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	190,900	192,400	391,900	399,200
Specialty Papers [Member] | Americas [Member]
Disaggregation Of Revenue [Line Items]
Net sales	188,505	190,546	386,333	395,321
Specialty Papers [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,526	822	3,136	1,819
Specialty Papers [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales	577	403	1,731	911
Specialty Papers [Member] | Carbonless & Forms [Member]
Disaggregation Of Revenue [Line Items]
Net sales	69,743	70,976	141,613	148,048
Specialty Papers [Member] | Engineered Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	51,697	47,113	101,648	95,275
Specialty Papers [Member] | Envelope & Converting [Member]
Disaggregation Of Revenue [Line Items]
Net sales	36,051	36,765	73,956	79,622
Specialty Papers [Member] | Book Publishing [Member]
Disaggregation Of Revenue [Line Items]
Net sales	31,963	36,111	70,521	73,284
Specialty Papers [Member] | Product [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 190,031	$ 191,368	$ 389,469	$ 397,140