Goodwill and Other Intangible Assets - Summary of Changes in Amounts of Goodwill and Other Intangible Assets (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
Finite Lived Intangible Assets [Line Items]
Goodwill, beginning balance	$ 164,369
Acquisitions	36,045
Translation	(4,953)
Goodwill, ending balance	195,461
Total intangibles, beginning balance	133,664
Total intangibles, Acquisitions	20,000
Total intangibles, Translation	(3,955)
Total intangibles, ending balance	149,709
Accumulated amortization, beginning balance	(51,829)
Accumulated amortization, Amortization	(4,299)
Accumulated amortization, Translation	1,441
Accumulated amortization, ending balance	(54,687)
Net intangibles, beginning balance	81,835
Net intangibles, Acquisitions	20,000
Net intangibles, Amortization	(4,299)
Net intangibles, Translation	(2,514)
Net intangibles, ending balance	95,022
Composite Fibers [Member]
Finite Lived Intangible Assets [Line Items]
Goodwill, beginning balance	84,586
Translation	(2,436)
Goodwill, ending balance	82,150
Composite Fibers [Member] | Tradename - Non Amortizing [Member]
Finite Lived Intangible Assets [Line Items]
Total intangibles, beginning balance	3,902
Total intangibles, Translation	(123)
Total intangibles, ending balance	3,779
Composite Fibers [Member] | Technology and Related [Member]
Finite Lived Intangible Assets [Line Items]
Total intangibles, beginning balance	41,578
Total intangibles, Translation	(1,141)
Total intangibles, ending balance	40,437
Accumulated amortization, beginning balance	(18,636)
Accumulated amortization, Amortization	(969)
Accumulated amortization, Translation	432
Accumulated amortization, ending balance	(19,173)
Net intangibles, beginning balance	22,942
Net intangibles, Amortization	(969)
Net intangibles, Translation	(709)
Net intangibles, ending balance	21,264
Composite Fibers [Member] | Customer Relationships and Related [Member]
Finite Lived Intangible Assets [Line Items]
Total intangibles, beginning balance	37,535
Total intangibles, Translation	(1,111)
Total intangibles, ending balance	36,424
Accumulated amortization, beginning balance	(21,290)
Accumulated amortization, Amortization	(1,262)
Accumulated amortization, Translation	617
Accumulated amortization, ending balance	(21,935)
Net intangibles, beginning balance	16,245
Net intangibles, Amortization	(1,262)
Net intangibles, Translation	(494)
Net intangibles, ending balance	14,489
Airlaid Materials [Member]
Finite Lived Intangible Assets [Line Items]
Goodwill, beginning balance	79,783
Acquisitions	36,045
Translation	(2,517)
Goodwill, ending balance	113,311
Airlaid Materials [Member] | Tradename [Member]
Finite Lived Intangible Assets [Line Items]
Total intangibles, beginning balance	3,960
Total intangibles, Translation	(125)
Total intangibles, ending balance	3,835
Accumulated amortization, beginning balance	(456)
Accumulated amortization, Amortization	(97)
Accumulated amortization, Translation	16
Accumulated amortization, ending balance	(537)
Net intangibles, beginning balance	3,504
Net intangibles, Amortization	(97)
Net intangibles, Translation	(109)
Net intangibles, ending balance	3,298
Airlaid Materials [Member] | Technology and Related [Member]
Finite Lived Intangible Assets [Line Items]
Total intangibles, beginning balance	20,053
Total intangibles, Translation	(615)
Total intangibles, ending balance	19,438
Accumulated amortization, beginning balance	(3,591)
Accumulated amortization, Amortization	(645)
Accumulated amortization, Translation	113
Accumulated amortization, ending balance	(4,123)
Net intangibles, beginning balance	16,462
Net intangibles, Amortization	(645)
Net intangibles, Translation	(502)
Net intangibles, ending balance	15,315
Airlaid Materials [Member] | Customer Relationships and Related [Member]
Finite Lived Intangible Assets [Line Items]
Total intangibles, beginning balance	26,636
Total intangibles, Acquisitions	20,000
Total intangibles, Translation	(840)
Total intangibles, ending balance	45,796
Accumulated amortization, beginning balance	(7,856)
Accumulated amortization, Amortization	(1,326)
Accumulated amortization, Translation	263
Accumulated amortization, ending balance	(8,919)
Net intangibles, beginning balance	18,780
Net intangibles, Acquisitions	20,000
Net intangibles, Amortization	(1,326)
Net intangibles, Translation	(577)
Net intangibles, ending balance	$ 36,877