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Segment Information - Schedule of Financial and Other Information by Business Unit (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 T | Mar. 31, 2013 T
Segment Reporting Information [Line Items] |  |
Net sales | $ 455,721 | $ 405,189
Energy and related sales, net | 5,262 | 1,101
Total revenue | 460,983 | 406,290
Cost of products sold | 405,943 | 348,915
Gross profit (loss) | 55,040 | 57,375
SG&A | 33,551 | 33,487
Gains on dispositions of plant, equipment and timberlands, net | (809) | (73)
Total operating income (loss) | 22,298 | 23,961
Non-operating expense | (4,540) | (3,492)
Income (loss) before income taxes | 17,758 | 20,469
Supplementary Data |  |
Net tons sold | 267,300,000 | 248,800,000
Depreciation, depletion and amortization | 18,615 | 15,358
Capital expenditures | 14,400 | 31,400
Composite Fibers [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 158,600 | 111,800
Energy and related sales, net |  |
Total revenue | 158,600 | 111,800
Cost of products sold | 126,000 | 90,400
Gross profit (loss) | 32,600 | 21,500
SG&A | 13,300 | 9,800
Gains on dispositions of plant, equipment and timberlands, net |  |
Total operating income (loss) | 19,300 | 11,600
Non-operating expense |  |
Income (loss) before income taxes | 19,300 | 11,600
Supplementary Data |  |
Net tons sold | 40,000,000 | 22,500,000
Depreciation, depletion and amortization | 7,600 | 4,600
Capital expenditures | 6,000 | 17,500
Advanced Airlaid Materials [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 71,300 | 66,200
Energy and related sales, net |  |
Total revenue | 71,300 | 66,200
Cost of products sold | 63,100 | 59,500
Gross profit (loss) | 8,200 | 6,700
SG&A | 2,300 | 2,200
Gains on dispositions of plant, equipment and timberlands, net |  |
Total operating income (loss) | 5,900 | 4,500
Non-operating expense |  |
Income (loss) before income taxes | 5,900 | 4,500
Supplementary Data |  |
Net tons sold | 25,100,000 | 23,900,000
Depreciation, depletion and amortization | 2,300 | 2,200
Capital expenditures | 1,500 | 2,100
Specialty Papers [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 225,800 | 227,100
Energy and related sales, net | 5,300 | 1,100
Total revenue | 231,100 | 228,200
Cost of products sold | 215,000 | 195,500
Gross profit (loss) | 16,100 | 32,700
SG&A | 13,700 | 14,500
Gains on dispositions of plant, equipment and timberlands, net |  |
Total operating income (loss) | 2,400 | 18,300
Non-operating expense |  |
Income (loss) before income taxes | 2,400 | 18,300
Supplementary Data |  |
Net tons sold | 202,200,000 | 202,300,000
Depreciation, depletion and amortization | 8,300 | 8,300
Capital expenditures | 6,200 | 8,600
Other and Unallocated [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales |  |
Energy and related sales, net |  |
Total revenue |  |
Cost of products sold | 1,800 | 3,500
Gross profit (loss) | (1,800) | (3,500)
SG&A | 4,300 | 7,000
Gains on dispositions of plant, equipment and timberlands, net | (800) | (100)
Total operating income (loss) | (5,200) | (10,500)
Non-operating expense | (4,500) | (3,500)
Income (loss) before income taxes | (9,800) | (13,900)
Supplementary Data |  |
Net tons sold |  |
Depreciation, depletion and amortization | 500 | 200
Capital expenditures | $ 800 | $ 3,200

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- Definition Total costs related to goods produced and sold during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 2 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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