Goodwill and Other Intangible Assets - Summary of Changes in Amounts of Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Goodwill
Goodwill, beginning balance	$ 164,369
Acquisitions	36,231
Translation	(8,981)
Goodwill, ending balance	191,619
Finite-lived Intangible Assets [Roll Forward]
Accumulated amortization, beginning balance	(51,829)
Net intangibles, Amortization	(6,762)
Accumulated amortization, ending balance	(55,671)
Net intangibles, Acquisitions	20,000
Total intangibles	146,380	$ 133,664
Intangible assets, net	90,709	$ 81,835
Intangible assets, gross, translation	(7,284)
Intangible assets, accumulated amortization, translation	2,920
Intangible assets, net, translation	(4,364)
Composite Fibers
Goodwill
Goodwill, beginning balance	84,586
Translation	(4,531)
Goodwill, ending balance	80,055
Composite Fibers | Tradename - Non Amortizing
Indefinite-lived Intangible Assets [Roll Forward]
Total intangibles, beginning balance	3,902
Total intangibles, Translation	(220)
Total intangibles, ending balance	3,682
Composite Fibers | Technology and Related
Finite-lived Intangible Assets [Roll Forward]
Total intangibles, beginning balance	41,578
Total intangibles, Translation	(2,189)
Total intangibles, ending balance	39,389
Accumulated amortization, beginning balance	(18,636)
Net intangibles, Amortization	(1,424)
Accumulated amortization, Translation	952
Accumulated amortization, ending balance	(19,108)
Net intangibles, beginning balance	22,942
Net intangibles, Translation	(1,237)
Net intangibles, ending balance	20,281
Composite Fibers | Customer Relationships and Related
Finite-lived Intangible Assets [Roll Forward]
Total intangibles, beginning balance	37,535
Total intangibles, Translation	(2,051)
Total intangibles, ending balance	35,484
Accumulated amortization, beginning balance	(21,290)
Net intangibles, Amortization	(1,892)
Accumulated amortization, Translation	1,208
Accumulated amortization, ending balance	(21,974)
Net intangibles, beginning balance	16,245
Net intangibles, Translation	(843)
Net intangibles, ending balance	13,510
Airlaid Materials
Goodwill
Goodwill, beginning balance	79,783
Acquisitions	36,231
Translation	(4,450)
Goodwill, ending balance	111,564
Airlaid Materials | Technology and Related
Finite-lived Intangible Assets [Roll Forward]
Total intangibles, beginning balance	20,053
Total intangibles, Translation	(1,099)
Total intangibles, ending balance	18,954
Accumulated amortization, beginning balance	(3,591)
Net intangibles, Amortization	(968)
Accumulated amortization, Translation	223
Accumulated amortization, ending balance	(4,336)
Net intangibles, beginning balance	16,462
Net intangibles, Translation	(876)
Net intangibles, ending balance	14,618
Airlaid Materials | Customer Relationships and Related
Finite-lived Intangible Assets [Roll Forward]
Total intangibles, beginning balance	26,636
Total intangibles, Translation	(1,502)
Total intangibles, ending balance	45,134
Accumulated amortization, beginning balance	(7,856)
Net intangibles, Amortization	(2,333)
Accumulated amortization, Translation	506
Accumulated amortization, ending balance	(9,683)
Net intangibles, beginning balance	18,780
Net intangibles, Acquisitions	20,000
Net intangibles, Translation	(996)
Net intangibles, ending balance	35,451
Airlaid Materials | Tradename
Finite-lived Intangible Assets [Roll Forward]
Total intangibles, beginning balance	3,960
Total intangibles, Translation	(223)
Total intangibles, ending balance	3,737
Accumulated amortization, beginning balance	(456)
Net intangibles, Amortization	(145)
Accumulated amortization, Translation	31
Accumulated amortization, ending balance	(570)
Net intangibles, beginning balance	3,504
Net intangibles, Translation	(192)
Net intangibles, ending balance	$ 3,167