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Acquisition - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended				1 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Minimum [Member]	Sep. 30, 2013 Maximum [Member]	Apr. 30, 2013 Dresden Papier GmbH [Member]	Sep. 30, 2013 Dresden Papier GmbH [Member]	Dec. 31, 2012 Dresden Papier GmbH [Member] Employees t
Business Acquisition [Line Items]
Date of acquisition								Apr. 30, 2013
Payment made for acquisition, net of cash acquired			$ 210,911,000				$ 211,000,000
Revenue	457,844,000	406,221,000	1,290,525,000	1,191,757,000				67,800,000	150,000,000
Number of employees									146
Manufacturing capacity									60,000
Useful life of property plant and equipment					5 years	30 years
Remaining useful life of intangible assets			17 years
Identifiable intangible assets			9,800,000
Operating income	31,841,000	31,285,000	62,133,000	80,051,000				12,300,000
Acquisition related costs								3,200,000
Fair value write up of acquired inventory			1,100,000
Integration related costs			$ 2,000,000

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Business acquisition preacquired manufacturing capacity.

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Business acquisition preacquired number of employees.

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Fair Value Write Up Of Acquired Inventory

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Date when the business acquisition agreement was executed, in CCYY-MM-DD format.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 23

-URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460

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Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, resulting from a business combination.

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The net result for the period of deducting operating expenses from operating revenues.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



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-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

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-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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