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Segment and Geographic Information - Schedule of Financial and Other Information by Business Unit (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 390,865 | $ 405,301 | $ 406,413 | $ 402,218 | $ 412,852 | $ 410,803 | $ 417,469 | $ 419,960 | $ 1,604,797 | $ 1,661,084 | $ 1,802,415
Energy and related sales, net |  |  |  |  |  |  |  |  | 6,141 | 5,664 | 7,927
Total revenues |  |  |  |  |  |  |  |  | 1,610,938 | 1,666,748 | 1,810,342
Cost of products sold |  |  |  |  |  |  |  |  | 1,392,335 | 1,463,783 | 1,575,188
Gross profit | 56,867 | $ 61,170 | $ 42,723 | $ 57,843 | 58,116 | $ 32,833 | $ 52,108 | $ 59,908 | 218,603 | 202,965 | 235,154
SG&A |  |  |  |  |  |  |  |  | 190,694 | 127,706 | 133,235
Losses (gains) on dispositions of plant, equipment and timberlands, net |  |  |  |  |  |  |  |  | 216 | (21,113) | (4,861)
Operating income |  |  |  |  |  |  |  |  | 27,693 | 96,372 | 106,780
Non-operating expense |  |  |  |  |  |  |  |  | (16,887) | (17,796) | (19,397)
Income before income taxes |  |  |  |  |  |  |  |  | 10,806 | 78,576 | 87,383
Supplementary Data |  |  |  |  |  |  |  |  |  |  |
Plant, equipment and timberlands, net | 775,898 |  |  |  | 698,864 |  |  |  | 775,898 | 698,864 | 697,608
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 65,826 | 63,236 | 70,555
Capital expenditures |  |  |  |  |  |  |  |  | 160,200 | 99,900 | 66,000
Composite Fibers [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 516,954 | 541,468 | 617,851
Total revenues |  |  |  |  |  |  |  |  | 517,000 | 541,500 | 617,900
Cost of products sold |  |  |  |  |  |  |  |  | 416,400 | 434,400 | 498,000
Gross profit |  |  |  |  |  |  |  |  | 100,600 | 107,100 | 119,900
SG&A |  |  |  |  |  |  |  |  | 46,300 | 45,700 | 51,600
Operating income |  |  |  |  |  |  |  |  | 54,300 | 61,400 | 68,300
Income before income taxes |  |  |  |  |  |  |  |  | 54,300 | 61,400 | 68,300
Supplementary Data |  |  |  |  |  |  |  |  |  |  |
Plant, equipment and timberlands, net | 235,100 |  |  |  | 258,100 |  |  |  | 235,100 | 258,100 | 277,800
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 27,800 | 26,200 | 29,700
Capital expenditures |  |  |  |  |  |  |  |  | 18,800 | 26,800 | 23,900
Advanced Airlaid Materials [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 244,262 | 244,589 | 281,673
Total revenues |  |  |  |  |  |  |  |  | 244,300 | 244,600 | 281,700
Cost of products sold |  |  |  |  |  |  |  |  | 209,500 | 215,700 | 247,600
Gross profit |  |  |  |  |  |  |  |  | 34,800 | 28,900 | 34,100
SG&A |  |  |  |  |  |  |  |  | 8,400 | 7,600 | 8,800
Operating income |  |  |  |  |  |  |  |  | 26,400 | 21,300 | 25,300
Income before income taxes |  |  |  |  |  |  |  |  | 26,400 | 21,300 | 25,300
Supplementary Data |  |  |  |  |  |  |  |  |  |  |
Plant, equipment and timberlands, net | 179,300 |  |  |  | 153,500 |  |  |  | 179,300 | 153,500 | 163,600
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 9,000 | 8,800 | 9,100
Capital expenditures |  |  |  |  |  |  |  |  | 36,800 | 7,800 | 7,600
Specialty Papers [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 843,582 | 875,026 | 902,891
Energy and related sales, net |  |  |  |  |  |  |  |  | 6,100 | 5,700 | 7,900
Total revenues |  |  |  |  |  |  |  |  | 849,700 | 880,700 | 910,800
Cost of products sold |  |  |  |  |  |  |  |  | 752,600 | 804,500 | 821,800
Gross profit |  |  |  |  |  |  |  |  | 97,100 | 76,200 | 89,000
SG&A |  |  |  |  |  |  |  |  | 55,900 | 43,300 | 50,400
Operating income |  |  |  |  |  |  |  |  | 41,200 | 32,900 | 38,600
Income before income taxes |  |  |  |  |  |  |  |  | 41,200 | 32,900 | 38,600
Supplementary Data |  |  |  |  |  |  |  |  |  |  |
Plant, equipment and timberlands, net | 352,900 |  |  |  | 281,600 |  |  |  | 352,900 | 281,600 | 250,100
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 26,300 | 26,000 | 29,900
Capital expenditures |  |  |  |  |  |  |  |  | 99,000 | 63,500 | 32,100
Other and Unallocated [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cost of products sold |  |  |  |  |  |  |  |  | 13,800 | 9,200 | 7,800
Gross profit |  |  |  |  |  |  |  |  | (13,800) | (9,200) | (7,800)
SG&A |  |  |  |  |  |  |  |  | 80,100 | 31,000 | 22,400
Losses (gains) on dispositions of plant, equipment and timberlands, net |  |  |  |  |  |  |  |  | 200 | (21,100) | (4,900)
Operating income |  |  |  |  |  |  |  |  | (94,100) | (19,100) | (25,300)
Non-operating expense |  |  |  |  |  |  |  |  | (16,900) | (17,800) | (19,400)
Income before income taxes |  |  |  |  |  |  |  |  | (111,000) | (36,900) | (44,700)
Supplementary Data |  |  |  |  |  |  |  |  |  |  |
Plant, equipment and timberlands, net | $ 8,600 |  |  |  | $ 5,700 |  |  |  | 8,600 | 5,700 | 6,100
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 2,700 | 2,200 | 1,900
Capital expenditures |  |  |  |  |  |  |  |  | $ 5,600 | $ 1,800 | $ 2,400

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