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Segment and Geographic Information - Schedule of Financial and Other Information by Business Unit (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 229,480 | $ 209,855 | $ 215,742 | $ 211,209 | $ 209,327 | $ 210,120 | $ 195,974 | $ 184,941 | $ 866,286 | $ 800,362 | $ 761,216
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 |  |  |  |  |  |  |  |  | $ 735,879 | $ 656,773 | $ 629,467
Type of Cost, Good or Service [Extensible List] |  |  |  |  |  |  |  |  | us-gaap:ProductMember | us-gaap:ProductMember | us-gaap:ProductMember
Gross profit | $ 30,674 | $ 29,872 | $ 33,300 | $ 36,561 | $ 38,337 | $ 37,375 | $ 35,096 | $ 32,781 | $ 130,407 | $ 143,589 | $ 131,749
SG&A |  |  |  |  |  |  |  |  | 111,721 | 110,534 | 153,153
(Gains) losses on dispositions of plant, equipment and timberlands, net |  |  |  |  |  |  |  |  | (3,256) | (197) | 116
Operating income (loss) |  |  |  |  |  |  |  |  | 21,942 | 33,252 | (21,520)
Non-operating expense |  |  |  |  |  |  |  |  | (14,667) | (13,785) | (21,062)
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 7,275 | 19,467 | (42,582)
Supplementary Data |  |  |  |  |  |  |  |  |  |  |
Plant, equipment and timberlands, net | 556,044 |  |  |  | 515,183 |  |  |  | 556,044 | 515,183 | 428,772
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 47,525 | 42,078 | 39,287
Capital expenditures |  |  |  |  |  |  |  |  | 42,100 | 80,800 | 61,200
Composite Fibers [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 554,900 | $ 544,300 | $ 517,000
Type of Revenue [Extensible List] |  |  |  |  |  |  |  |  | us-gaap:ProductMember | us-gaap:ProductMember | us-gaap:ProductMember
Cost of products sold |  |  |  |  |  |  |  |  | $ 462,300 | $ 437,600 | $ 416,400
Type of Cost, Good or Service [Extensible List] |  |  |  |  |  |  |  |  | us-gaap:ProductMember | us-gaap:ProductMember | us-gaap:ProductMember
Gross profit |  |  |  |  |  |  |  |  | $ 92,600 | $ 106,700 | $ 100,600
SG&A |  |  |  |  |  |  |  |  | 44,200 | 44,400 | 46,300
Operating income (loss) |  |  |  |  |  |  |  |  | 48,400 | 62,300 | 54,300
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 48,400 | 62,300 | 54,300
Supplementary Data |  |  |  |  |  |  |  |  |  |  |
Plant, equipment and timberlands, net | 233,200 |  |  |  | 254,000 |  |  |  | 233,200 | 254,000 | 235,100
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 28,300 | 28,300 | 27,800
Capital expenditures |  |  |  |  |  |  |  |  | 15,700 | 15,900 | 18,800
Advanced Airlaid Materials [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 311,400 | $ 256,100 | $ 244,300
Type of Revenue [Extensible List] |  |  |  |  |  |  |  |  | us-gaap:ProductMember | us-gaap:ProductMember | us-gaap:ProductMember
Cost of products sold |  |  |  |  |  |  |  |  | $ 269,300 | $ 216,700 | $ 209,500
Type of Cost, Good or Service [Extensible List] |  |  |  |  |  |  |  |  | us-gaap:ProductMember | us-gaap:ProductMember | us-gaap:ProductMember
Gross profit |  |  |  |  |  |  |  |  | $ 42,100 | $ 39,400 | $ 34,800
SG&A |  |  |  |  |  |  |  |  | 12,200 | 9,300 | 8,400
Operating income (loss) |  |  |  |  |  |  |  |  | 29,900 | 30,100 | 26,400
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 29,900 | 30,100 | 26,400
Supplementary Data |  |  |  |  |  |  |  |  |  |  |
Plant, equipment and timberlands, net | 298,200 |  |  |  | 235,600 |  |  |  | 298,200 | 235,600 | 179,300
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 14,900 | 9,600 | 9,000
Capital expenditures |  |  |  |  |  |  |  |  | $ 21,600 | $ 50,600 | $ 36,800
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 |  |  |  |  |  |  |  |  | $ 4,300 | $ 2,500 | $ 3,600
Type of Cost, Good or Service [Extensible List] |  |  |  |  |  |  |  |  | us-gaap:ProductMember | us-gaap:ProductMember | us-gaap:ProductMember
Gross profit |  |  |  |  |  |  |  |  | $ (4,300) | $ (2,500) | $ (3,600)
SG&A |  |  |  |  |  |  |  |  | 55,300 | 56,800 | 98,400
(Gains) losses on dispositions of plant, equipment and timberlands, net |  |  |  |  |  |  |  |  | (3,300) | (200) | 100
Operating income (loss) |  |  |  |  |  |  |  |  | (56,300) | (59,100) | (102,100)
Non-operating expense |  |  |  |  |  |  |  |  | (14,700) | (13,800) | (21,100)
Income (loss) before income taxes |  |  |  |  |  |  |  |  | (71,000) | (72,900) | (123,200)
Supplementary Data |  |  |  |  |  |  |  |  |  |  |
Plant, equipment and timberlands, net | $ 24,600 |  |  |  | $ 25,600 |  |  |  | 24,600 | 25,600 | 14,400
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 4,300 | 4,200 | 2,500
Capital expenditures |  |  |  |  |  |  |  |  | $ 4,800 | $ 14,300 | $ 5,600

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