Segment and Geographic Information - Schedule of Financial and Other Information by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 230,972	$ 232,515	$ 235,053	$ 229,133	$ 229,480	$ 209,855	$ 215,742	$ 211,209	$ 927,673	$ 866,286	$ 800,362
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Cost of products sold									$ 780,131	$ 735,879	$ 656,773
Type of Cost, Good or Service [Extensible List]									us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Gross profit	$ 36,404	$ 38,021	$ 37,500	$ 35,617	$ 30,674	$ 29,872	$ 33,300	$ 36,561	$ 147,542	$ 130,407	$ 143,589
SG&A									94,967	111,721	110,534
Gains (Loss) on dispositions of plant, equipment and timberlands, net									(2,060)	(3,256)	(197)
Operating income									54,635	21,942	33,252
Non-operating expense									(89,088)	(14,667)	(13,785)
Income (loss) before income taxes									(34,453)	7,275	19,467
Supplementary Data
Plant, equipment and timberlands, net	537,421				556,044				537,421	556,044	515,183
Depreciation, depletion and amortization									50,820	47,525	42,078
Capital expenditures									27,800	42,100	80,800
Composite Fibers [Member]
Segment Reporting Information [Line Items]
Net sales									$ 521,700	$ 554,900	$ 544,300
Type of Revenue [Extensible List]									us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Cost of products sold									$ 432,200	$ 462,300	$ 437,600
Type of Cost, Good or Service [Extensible List]									us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Gross profit									$ 89,500	$ 92,600	$ 106,700
SG&A									41,600	44,200	44,400
Operating income									47,900	48,400	62,300
Income (loss) before income taxes									47,900	48,400	62,300
Supplementary Data
Plant, equipment and timberlands, net	222,700				233,200				222,700	233,200	254,000
Depreciation, depletion and amortization									26,200	28,300	28,300
Capital expenditures									12,000	15,700	15,900
Airlaid Materials [Member]
Segment Reporting Information [Line Items]
Net sales									$ 406,000	$ 311,400	$ 256,100
Type of Revenue [Extensible List]									us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Cost of products sold									$ 346,600	$ 269,300	$ 216,700
Type of Cost, Good or Service [Extensible List]									us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Gross profit									$ 59,400	$ 42,100	$ 39,400
SG&A									18,300	12,200	9,300
Operating income									41,100	29,900	30,100
Income (loss) before income taxes									41,100	29,900	30,100
Supplementary Data
Plant, equipment and timberlands, net	293,800				298,200				293,800	298,200	235,600
Depreciation, depletion and amortization									21,100	14,900	9,600
Capital expenditures									$ 13,700	$ 21,600	$ 50,600
Other and Unallocated [Member]
Segment Reporting Information [Line Items]
Type of Revenue [Extensible List]									us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Cost of products sold									$ 1,300	$ 4,300	$ 2,500
Type of Cost, Good or Service [Extensible List]									us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Gross profit									$ (1,300)	$ (4,300)	$ (2,500)
SG&A									35,100	55,300	56,800
Gains (Loss) on dispositions of plant, equipment and timberlands, net									(2,100)	(3,300)	(200)
Operating income									(34,300)	(56,300)	(59,100)
Non-operating expense									(89,100)	(14,700)	(13,800)
Income (loss) before income taxes									(123,400)	(71,000)	(72,900)
Supplementary Data
Plant, equipment and timberlands, net	$ 20,900				$ 24,600				20,900	24,600	25,600
Depreciation, depletion and amortization									3,500	4,300	4,200
Capital expenditures									$ 2,100	$ 4,800	$ 14,300