Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Net sales	$ 279,651	$ 233,473	$ 750,236	$ 681,216
Product
Disaggregation Of Revenue [Line Items]
Net sales	279,651	233,473	750,236	681,216
Composite Fibers
Disaggregation Of Revenue [Line Items]
Net sales	138,118	132,419	420,965	387,267
Composite Fibers | Europe, Middle East and Africa
Disaggregation Of Revenue [Line Items]
Net sales	81,576	82,032	254,317	230,434
Composite Fibers | Americas
Disaggregation Of Revenue [Line Items]
Net sales	33,461	31,583	100,671	97,656
Composite Fibers | Asia Pacific
Disaggregation Of Revenue [Line Items]
Net sales	23,081	18,804	65,977	59,177
Composite Fibers | Food & beverage
Disaggregation Of Revenue [Line Items]
Net sales	73,667	68,593	224,155	213,074
Composite Fibers | Wallcovering
Disaggregation Of Revenue [Line Items]
Net sales	22,116	24,695	68,927	55,847
Composite Fibers | Technical specialties
Disaggregation Of Revenue [Line Items]
Net sales	22,029	22,517	70,232	61,340
Composite Fibers | Composite laminates
Disaggregation Of Revenue [Line Items]
Net sales	11,841	8,640	32,199	26,529
Composite Fibers | Metallized
Disaggregation Of Revenue [Line Items]
Net sales	8,465	7,974	25,452	30,477
Airlaid Materials
Disaggregation Of Revenue [Line Items]
Net sales	141,533	101,054	329,271	293,949
Airlaid Materials | Europe, Middle East and Africa
Disaggregation Of Revenue [Line Items]
Net sales	64,730	52,835	159,354	151,434
Airlaid Materials | Americas
Disaggregation Of Revenue [Line Items]
Net sales	74,876	44,141	164,392	133,789
Airlaid Materials | Asia Pacific
Disaggregation Of Revenue [Line Items]
Net sales	1,927	4,078	5,525	8,726
Airlaid Materials | Feminine hygiene
Disaggregation Of Revenue [Line Items]
Net sales	55,177	53,463	150,002	154,227
Airlaid Materials | Specialty wipes
Disaggregation Of Revenue [Line Items]
Net sales	37,190	17,929	74,477	56,088
Airlaid Materials | Tabletop
Disaggregation Of Revenue [Line Items]
Net sales	26,447	12,445	50,498	33,026
Airlaid Materials | Adult incontinence
Disaggregation Of Revenue [Line Items]
Net sales	6,324	5,255	16,085	16,411
Airlaid Materials | Home care
Disaggregation Of Revenue [Line Items]
Net sales	7,811	7,121	18,073	18,611
Airlaid Materials | Other
Disaggregation Of Revenue [Line Items]
Net sales	$ 8,584	$ 4,841	$ 20,136	$ 15,586