Magnera (MAGN) 10-K 27 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Feb. 25, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	GLT
Entity Registrant Name	GLATFELTER P H CO
Entity Central Index Key	41719
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		43,095,572
Entity Public Float			$1,123

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net sales	$436,261	$465,092	$445,341	$455,721	$434,811	$456,648	$425,967	$405,189	$1,802,415	$1,722,615	$1,577,788
Energy and related sales, net									7,927	3,153	7,000
Total revenues									1,810,342	1,725,768	1,584,788
Costs of products sold									1,575,188	1,507,108	1,371,139
Gross profit	58,164	80,513	41,437	55,040	54,406	66,039	40,840	57,375	235,154	218,660	213,649
Selling, general and administrative expenses									133,235	133,867	121,590
Gains on dispositions of plant, equipment and timberlands, net									-4,861	-1,726	-9,815
Operating income									106,780	86,519	101,874
Non-operating income (expense)
Interest expense									-18,921	-17,965	-18,694
Interest income									159	310	460
Other, net									-635	337	-4,699
Total other expense									-19,397	-17,318	-22,933
Income before income taxes									87,383	69,201	78,941
Income tax provision									18,137	2,043	19,562
Net income									$69,246	$67,158	$59,379
Earnings per share
Basic									$1.60	$1.56	$1.39
Diluted	$0.45	$0.69	$0.11	$0.33	$0.37	$0.77	$0.02	$0.36	$1.57	$1.52	$1.36
Cash dividends declared per common share									$0.44	$0.40	$0.36
Weighted average shares outstanding
Basic									43,201	43,158	42,851
Diluted									44,066	44,299	43,672

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$69,246	$67,158	$59,379
Foreign currency translation adjustments	-49,365	14,826	11,358
Net change in:
Deferred gains (losses) on cash flow hedges, net of taxes of $(1,281), $178 and $638, respectively	3,297	-517	-1,609
Unrecognized retirement obligations, net of taxes of $20,730, $(45,118) and $3,914, respectively	-33,445	74,300	-6,974
Other comprehensive income (loss)	-79,513	88,609	2,775
Comprehensive (loss) income	($10,267)	$155,767	$62,154

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Taxes on deferred gains (losses) on cash flow hedges	($1,281)	$178	$638
Taxes on unrecognized retirement obligations	$20,730	($45,118)	$3,914

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets
Cash and cash equivalents	$99,837	$122,882
Accounts receivable (less allowance for doubtful accounts: 2014 - $2,703; 2013 - $2,725)	163,760	167,830
Inventories	248,705	236,310
Prepaid expenses and other current assets	62,320	59,560
Total current assets	574,622	586,582
Plant, equipment and timberlands, net	697,608	723,340
Goodwill	84,137	95,948
Intangible assets	77,098	96,081
Other assets	128,039	176,459
Total assets	1,561,504	1,678,410
Liabilities and Shareholders' Equity
Current portion of long-term debt	5,734
Accounts payable	157,070	161,242
Dividends payable	4,775	4,363
Environmental liabilities	1,075	125
Other current liabilities	111,077	122,637
Total current liabilities	279,731	288,367
Long-term debt	398,878	442,325
Deferred income taxes	104,016	141,020
Other long-term liabilities	129,770	122,222
Total liabilities	912,395	993,934
Commitments and contingencies
Shareholders' equity
Common stock, $0.01 par value; authorized - 120,000,000; issued - 54,361,980 (including treasury shares: 2014 - 11,307,589; 2013 - 11,234,039)	544	544
Capital in excess of par value	54,342	53,940
Retained earnings	919,468	869,329
Accumulated other comprehensive loss	-154,870	-75,357
Shareholders' equity before treasury stock	819,484	848,456
Less cost of common stock in treasury	-170,375	-163,980
Total shareholders' equity	649,109	684,476
Total liabilities and shareholders' equity	$1,561,504	$1,678,410

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$2,703	$2,725
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	54,361,980	54,361,980
Treasury stock, shares	11,307,589	11,234,039

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities
Net income	$69,246	$67,158	$59,379
Adjustments to reconcile to net cash provided by operations:
Depreciation, depletion and amortization	70,555	68,196	69,500
Amortization of debt issue costs and original issue discount	1,315	1,305	3,177
Pension expense, net of unfunded benefits paid	5,173	12,787	10,427
Charge for impairment of intangible asset	3,262
Deferred income tax benefit	-9,419	-11,485	-2,209
Gains on dispositions of plant, equipment and timberlands, net	-4,861	-1,726	-9,815
Share-based compensation	7,859	7,337	6,520
Change in operating assets and liabilities
Accounts receivable	-5,404	-777	-3,379
Inventories	-21,456	2,704	-12,615
Prepaid and other current assets	-3,521	7,965	-14,952
Accounts payable	-4,175	24,822	6,953
Accruals and other current liabilities	-12,802	3,140	8,406
Other	3,805	-7,791	-8,546
Net cash provided by operating activities	99,577	173,635	112,846
Investing activities
Expenditures for purchases of plant, equipment and timberlands	-66,046	-103,047	-58,752
Proceeds from disposals of plant, equipment and timberlands, net	5,072	1,947	10,272
Acquisition, net of cash acquired	-8,015	-210,911
Other	-600	-425	-225
Net cash used by investing activities	-69,589	-312,436	-48,705
Financing activities
Proceeds from note offerings			250,000
Repayments of note offerings			-205,131
Net borrowings under (repayments of) revolving credit facility	-30,720	126,139	-27,000
Payments of borrowing costs		-419	-4,748
Proceeds from term loans	12,592	56,091
Repurchases of common stock	-12,180		-5,675
Payments of dividends	-18,696	-16,965	-15,608
Payments related to share-based compensation awards and other	-1,877	-1,671	2,673
Net cash (used) provided by financing activities	-50,881	163,175	-5,489
Effect of exchange rate changes on cash	-2,152	829	750
Net (decrease) increase in cash and cash equivalents	-23,045	25,203	59,402
Cash and cash equivalents at the beginning of period	122,882	97,679	38,277
Cash and cash equivalents at the end of period	99,837	122,882	97,679
Cash paid for:
Interest, net of amounts capitalized	17,643	17,231	14,400
Income taxes, net	$24,139	$15,588	$44,657

Consolidated_Statements_of_Sha

Consolidated Statements of Shareholders' Equity (USD $)	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]
In Thousands, unless otherwise specified
Beginning Balance at Dec. 31, 2011	$490,404	$544	$51,477	$775,825	($166,741)	($170,701)
Net income	59,379			59,379
Other comprehensive income (loss)	2,775				2,775
Comprehensive income (loss)	62,154
Tax effect on exercise of stock awards	631		631
Cash dividends declared ($0.36, $0.40 and $0.44 per share at 2012, 2013 and 2014 respectively)	-15,611			-15,611
Share-based compensation expense	3,970		3,970
Repurchase of common shares	-5,675					-5,675
Delivery of treasury shares
RSUs	-337		-1,433			1,096
401 (k) plans	2,446		234			2,212
Employee stock options exercised - net	1,697		-2,387			4,084
Ending Balance at Dec. 31, 2012	539,679	544	52,492	819,593	-163,966	-168,984
Net income	67,158			67,158
Other comprehensive income (loss)	88,609				88,609
Comprehensive income (loss)	155,767
Tax effect on exercise of stock awards	1,451		1,451
Cash dividends declared ($0.36, $0.40 and $0.44 per share at 2012, 2013 and 2014 respectively)	-17,422			-17,422
Share-based compensation expense	4,473		4,473
Delivery of treasury shares
RSUs	-529		-1,763			1,234
401 (k) plans	2,890		1,099			1,791
Employee stock options exercised - net	-1,833		-3,812			1,979
Ending Balance at Dec. 31, 2013	684,476	544	53,940	869,329	-75,357	-163,980
Net income	69,246			69,246
Other comprehensive income (loss)	-79,513				-79,513
Comprehensive income (loss)	-10,267
Tax effect on exercise of stock awards	-14		-14
Cash dividends declared ($0.36, $0.40 and $0.44 per share at 2012, 2013 and 2014 respectively)	-19,107			-19,107
Share-based compensation expense	4,738		4,738
Repurchase of common shares	-12,180					-12,180
Delivery of treasury shares
RSUs	-1,758		-4,121			2,363
401 (k) plans	3,093		1,318			1,775
Employee stock options exercised - net	128		-1,519			1,647
Ending Balance at Dec. 31, 2014	$649,109	$544	$54,342	$919,468	($154,870)	($170,375)

Consolidated_Statements_of_Sha1

Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Per share amount of cash dividends declared	$0.44	$0.40	$0.36
Retained Earnings [Member]
Per share amount of cash dividends declared	$0.44	$0.40	$0.36

Organization

Organization	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Organization	1	ORGANIZATION
	P. H. Glatfelter Company and subsidiaries (“Glatfelter”) is a manufacturer of specialty papers and fiber-based engineered materials. Headquartered in York, PA, U.S. operations include facilities in Spring Grove, PA and Chillicothe and Fremont, OH. International operations include facilities in Canada, Germany, France, the United Kingdom and the Philippines, and sales and distribution offices in Russia and China. Our products are marketed worldwide, either through wholesale paper merchants, brokers and agents, or directly to customers.

Accounting_Policies

Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Accounting Policies	2	ACCOUNTING POLICIES
	Principles of Consolidation    The consolidated financial statements include the accounts of Glatfelter and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated.
	Accounting Estimates    The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingencies as of the balance sheet date and the reported amounts of revenues and expenses during the reporting period. Management believes the estimates and assumptions used in the preparation of these consolidated financial statements are reasonable, based upon currently available facts and known circumstances, but recognizes that actual results may differ from those estimates and assumptions.
	Cash and Cash Equivalents    We classify all highly liquid instruments with an original maturity of three months or less at the time of purchase as cash equivalents.
	Inventories    Inventories are stated at the lower of cost or market. Raw materials, in-process and finished inventories of our U.S. manufacturing operations are valued using the last-in, first-out (LIFO) method, and the supplies inventories are valued principally using the average-cost method. Inventories at our foreign operations are valued using the average cost method.
	Plant, Equipment and Timberlands    For financial reporting purposes, depreciation is computed using the straight-line method over the estimated useful lives of the respective assets.
	The range of estimated service lives used to calculate financial reporting depreciation for principal items of plant and equipment are as follows:
	Buildings			15 – 45 Years
	Machinery and equipment			5 – 40 Years
	Other			3 – 25 Years
	Maintenance and Repairs    Maintenance and repairs costs are charged to income and major renewals and betterments are capitalized. At the time property is retired or sold, the net carrying value is eliminated and any resultant gain or loss is included in income.
	Valuation of Long-lived Assets, Intangible Assets and Goodwill    We evaluate long-lived assets for impairment when a specific event indicates that the carrying value of an asset may not be recoverable. Recoverability is assessed based on estimates of future cash flows expected to result from the use and eventual disposition of the asset. If the sum of expected undiscounted cash flows is less than the carrying value of the asset, the asset’s fair value is estimated and an impairment loss is recognized for any deficiencies. Goodwill and non-amortizing tradename intangible assets are reviewed, on a discounted cash flow basis, during the third quarter of each year for impairment or more frequently if impairment indicators are present. Impairment losses, if any, are recognized for the amount by which the carrying value of the reporting unit exceeds its fair value. The carrying value of a reporting unit is defined using an enterprise premise which is generally determined by the difference between the unit’s assets and operating liabilities.
	Asset Retirement Obligations    In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) No. 410, Asset Retirement and Environmental Obligations, we accrue asset retirement obligations in the period in which obligations relating to future asset retirements are incurred and when a reasonable estimate of fair value can be determined. Under these standards, costs are to be accrued at estimated fair value, and a related long-lived asset is capitalized. Over time, the liability is accreted to its settlement value and the capitalized cost is depreciated over the useful life of the related asset for which the obligation exists. Upon settlement of the liability, we recognize a gain or loss for any difference between the settlement amount and the liability recorded.
	Income Taxes    Income taxes are determined using the asset and liability method of accounting for income taxes in accordance with FASB ASC 740 Income Taxes (“ASC 740”). Under ASC 740, tax expense includes U.S. and international income taxes plus the provision for U.S. taxes on undistributed earnings of international subsidiaries not deemed to be permanently invested. Tax credits and other incentives reduce tax expense in the year the credits are claimed. Certain items of income and expense are not reported in tax returns and financial statements in the same year. The tax effect of such temporary differences is reported in deferred income taxes. Deferred tax assets are recognized if it is more likely than not that the assets will be realized in future years. We establish a valuation allowance for deferred tax assets for which realization is not more likely than not.
	Income tax contingencies are accounted for in accordance with FASB ASC 740-10-20 Income Taxes. Significant judgment is required in determining our worldwide provision for income taxes and recording the related assets and liabilities. In the ordinary course of our business, there are many transactions and calculations where the ultimate tax determination is less than certain. We and our subsidiaries are examined by various Federal, State, and foreign tax authorities. We regularly assess the potential outcomes of these examinations and any future examinations for the current or prior years in determining the adequacy of our provision for income taxes. We continually assess the likelihood and amount of potential adjustments and record any necessary adjustments in the period in which the facts that give rise to a revision become known.
	Treasury Stock    Common stock purchased for treasury is recorded at cost. At the date of subsequent reissue, the treasury stock account is reduced by the cost of such stock on the weighted-average cost basis.
	Foreign Currency Translation    Foreign currency translation gains and losses and the effect of exchange rate changes on transactions designated as hedges of net foreign investments are included as a component of other comprehensive income (loss). Transaction gains and losses are included in income in the period in which they occur.
	Revenue Recognition    We recognize revenue on product sales when the customer takes title and assumes the risks and rewards of ownership. Estimated costs for sales incentives, discounts and sales returns and allowances are recorded as sales deductions in the period in which the related revenue is recognized.
	Revenue from energy sales is recognized when electricity is delivered to the customer. Certain costs associated with the production of electricity, such as fuel, labor, depreciation and maintenance are netted against energy sales for presentation on the consolidated statements of income.
	Revenue from renewable energy credits is recorded under the caption “Energy and related sales, net” in the Consolidated Statements of Income and is recognized when all risks, rights and rewards to the certificate are transferred to the counterparty.
	Environmental Liabilities    Accruals for losses associated with environmental obligations are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated based on existing legislation and remediation technologies. Costs related to environmental remediation are charged to expense. These accruals are adjusted periodically as assessment and remediation actions continue and/or further legal or technical information develops. Such undiscounted liabilities are exclusive of any insurance or other claims against third parties. Environmental costs are capitalized if the costs extend the life of the asset, increase its capacity and/or mitigate or prevent contamination from future operations. Recoveries of environmental remediation costs from other parties, including insurance carriers, are recorded as assets when their receipt is assured beyond a reasonable doubt.
	Earnings Per Share    Basic earnings per share is computed by dividing net income by the weighted-average common shares outstanding during the respective periods. Diluted earnings per share is computed by dividing net income by the weighted-average common shares and common share equivalents outstanding during the period. The dilutive effect of common share equivalents is considered in the diluted earnings per share computation using the treasury stock method.
	Financial Derivatives and Hedging Activities    We use financial derivatives to manage exposure to changes in foreign currencies. In accordance with FASB ASC 815 Derivatives and Hedging (“ASC 815”), we record all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting, and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting.
	Cash Flow Hedges    The effective portion of the gain or loss on those derivative instruments designated and qualifying as a hedge of the exposure to variability in expected future cash flows related to forecasted transactions is deferred and reported as a component of accumulated other comprehensive income (loss). Deferred gains or losses are reclassified to our results of operations at the time the hedged forecasted transaction is recorded in our results of operations. The effectiveness of cash flow hedges is assessed at inception and quarterly thereafter. If the instrument becomes ineffective or it becomes probable that the originally-forecasted transaction will not occur, the related change in fair value of the derivative instrument is also reclassified from accumulated other comprehensive income (loss) and recognized in earnings.
	Fair Value of Financial Instruments    Under the accounting for fair value measurements and disclosures, a fair value hierarchy was established that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The three levels of the fair value hierarchy are described below:
	Level 1 –		Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.
	Level 2 –		Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, including quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates); and inputs that are derived principally from or corroborated by observable market data by correlation or other means.
	Level 3 –		Inputs that are both significant to the fair value measurement and unobservable.
	Recently Issued Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update No. 2014-09 – Revenue from Contracts with Customers which clarifies the principles for recognizing revenue and develops a common revenue standard for GAAP and International Financial Reporting Standards. The new standard is required to be adopted for fiscal years beginning after December 15, 2016 and early adoption is not permitted. We are in the process of evaluating the impact this standard may have, if any, on our reported results of operations or financial position.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Acquisitions	3	ACQUISITIONS
	On October 1, 2014, we completed the acquisition of all of the outstanding equity of Spezialpapierfabrik Oberschmitten GmbH (SPO) from FINSPO Beteiligungs-GmbH for $8.0 million, in cash. SPO has annual sales of approximately $33 million. SPO, located near Frankfurt, Germany, primarily produces highly technical papers for a wide range of capacitors used in consumer and industrial products; insulation papers for cables and transformers; and materials for industrial power inverters, electromagnetic current filters and electric rail traction. SPO also produces glassine products, which are used in cosmetics packaging, food packaging, and pharmaceutical dosage bags. SPO is operated as part of the Composite Fibers business unit, and complements other technical specialties.
	On April 30, 2013, we completed the acquisition of all outstanding shares of Dresden Papier GmbH (“Dresden”) from Fortress Paper Ltd. for $211 million, net of cash acquired. Dresden, based in Heidenau, Germany, is the leading global supplier of nonwoven wallpaper base materials, and is a major supplier to most of the world’s largest wallpaper manufacturers. Dresden’s revenue for the full year 2013 was $158.6 million and it employed approximately 146 people at its state-of-the-art, 72,800 short-ton-capacity manufacturing facility. We financed the acquisition through a combination of cash on hand and borrowings under our Revolving Credit Facility.
	The acquisition of Dresden added another industry-leading nonwovens product line to our Composite Fibers business unit, and broadened our relationship with leading producers of consumer and industrial products. This acquisition also provides additional operational leverage and growth opportunities for Glatfelter globally, particularly in large markets such as China, and other developing markets in eastern Europe and Asia.
	The allocation of the purchase price to assets acquired and liabilities assumed was as follows:
	In thousands		Final Allocation
	Assets
	Cash and cash equivalents		$	12,227
	Accounts receivable			23,870
	Inventory			13,864
	Prepaid and other current assets			8,060
	Plant, equipment and timberlands			60,951
	Intangible assets			87,596
	Goodwill			74,870
	Total assets			281,438
	Liabilities
	Accounts payable			20,253
	Deferred tax liabilities			36,120
	Other long term liabilities			1,927
	Total liabilities			58,300
	Total			223,138
	less cash acquired			(12,227	)
	Total purchase price		$	210,911
	For purposes of allocating the total purchase price, assets acquired and liabilities assumed are recorded at their estimated fair market value. The allocation set forth above is based on management’s estimate of the fair value using valuation techniques such as discounted cash flow models, appraisals and similar methodologies. The amount allocated to intangible assets represents the estimated value of customer relationships, technological know-how and trade name.
	Acquired property, plant and equipment are preliminarily being depreciated on a straight-line basis with estimated remaining lives ranging from 5 years to 30 years. Intangible assets are being amortized on a straight-line basis over an average estimated remaining life of 17 years reflecting the expected future value.
	In connection with the Dresden acquisition we recorded $74.9 million of goodwill and $87.6 million of intangible assets. The goodwill arising from the acquisition largely relates to strategic benefits, product and market diversification, assembled workforce, and similar factors. For tax purposes, none of the goodwill is deductible. Intangible assets consisted of $9.8 million of non-amortizing tradename, and the remainder consists of technology and customer relationships. Refer to Note 6 – Asset Impairment Charge for additional information.
	Our results of operations include the results of Dresden prospectively since the acquisition was completed on April 30, 2013. All such results reported herein are included as part of the Composite Fibers business unit. Revenue and operating income of Dresden included in our consolidated results of operations for 2013 totaled $101.8 million and $18.3 million, respectively.
	The table below summarizes pro forma financial information as if the acquisition and related financing transaction occurred as of January 1, 2012:
			Year ended December 31
	In thousands, except per share			2013			2012
	Pro forma
	Net sales		$	1,779,434		$	1,727,538
	Net income			80,381			79,075
	Diluted earnings per share			1.82			1.81
	During 2013, we incurred legal, professional and advisory costs directly related to the Dresden acquisition totaling $3.2 million. For purposes of presenting the above pro forma financial information, such costs have been eliminated. All such costs are presented under the caption “Selling, general and administrative expenses” in the accompanying consolidated statements of income. In addition, the pro forma financial information excludes $1.1 million of charges to costs of products sold related to the write up of inventory to fair value and $2.0 million of integration related costs. This unaudited pro forma financial information above is not necessarily indicative of what the operating results would have been had the acquisition been completed at the beginning of the respective period nor is it indicative of future results.

Energy_and_Related_Sales_Net

Energy and Related Sales, Net	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Energy and Related Sales, Net	4	ENERGY AND RELATED SALES, NET
	We sell excess power generated by the Spring Grove, PA facility. We also sell renewable energy credits generated by the Spring Grove, PA and Chillicothe, OH facilities representing sales of certified credits earned related to burning renewable sources of energy such as black liquor and wood waste.
	The following table summarizes this activity for each of the past three years:
			Year ended December 31
	In thousands			2014			2013			2012
	Energy sales		$	11,886		$	8,189		$	5,284
	Costs to produce			(6,204	)		(6,784	)		(4,187	)
	Net			5,682			1,405			1,097
	Renewable energy credits			2,245			1,748			5,903
	Total		$	7,927		$	3,153		$	7,000

Gain_on_Dispositions_of_Plant_

Gain on Dispositions of Plant, Equipment and Timberlands	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Gain on Dispositions of Plant, Equipment and Timberlands	5	GAIN ON DISPOSITIONS OF PLANT, EQUIPMENT AND TIMBERLANDS
	During 2014, 2013 and 2012, we completed the following sales of assets:
	Dollars in thousands		Acres		Proceeds		Gain
	2014
	Timberlands		2,753	$	5,062	$	4,855
	Other		n/a		10		6
	Total			$	5,072	$	4,861
	2013
	Timberlands		876	$	1,445	$	1,410
	Other		n/a		502		316
	Total			$	1,947	$	1,726
	2012
	Timberlands		4,830	$	9,494	$	9,203
	Other		n/a		778		612
	Total			$	10,272	$	9,815

Asset_Impairment_Charge

Asset Impairment Charge	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Asset Impairment Charge	6	ASSET IMPAIRMENT CHARGE
	During the third quarter of 2014, in connection with our annual test of potential impairment of indefinite lived intangible assets, we recorded a $3.3 million non-cash asset impairment charge related to a trade name intangible asset acquired in connection with the 2013 Dresden acquisition. The charge was due to a change in the estimated fair value of the trade name, primarily driven by a substantial increase in discount rates related to Dresden’s business in Russia and Ukraine and this region’s political instability. The estimated fair value, a Level 3 measurement, included the use of several key assumptions including, among others, estimated revenue and discount rates.
	The charge is recorded in the accompanying consolidated statements of income under the caption “selling, general and administrative expenses.” For additional information on Goodwill and Intangible Assets, see Note 14.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share	7	EARNINGS PER SHARE
	The following table sets forth the details of basic and diluted earnings per share (EPS):
			Year ended December 31
	In thousands, except per share			2014		2013		2012
	Net income		$	69,246	$	67,158	$	59,379
	Weighted average common shares outstanding used in basic EPS			43,201		43,158		42,851
	Common shares issuable upon exercise of dilutive stock options and PSAs / RSUs			865		1,141		821
	Weighted average common shares outstanding and common share equivalents used in diluted EPS			44,066		44,299		43,672
	Earnings per share
	Basic		$	1.6	$	1.56	$	1.39
	Diluted			1.57		1.52		1.36
	The following table sets forth the potential common shares outstanding for stock options and restricted stock units that were not included in the computation of diluted EPS for the period indicated, because their effect would be anti-dilutive:
			Year ended December 31
	In thousands			2014		2013		2012
	Potential common shares			277		7		8

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Accumulated Other Comprehensive Income	8	ACCUMULATED OTHER COMPREHENSIVE INCOME
	The following table sets forth details of the changes in accumulated other comprehensive income (losses) for the three years ended December 31, 2014, 2013 and 2012.
	in thousands			Currency			Unrealized			Change in			Change in			Total
				translation			gain (loss)			pensions			other
				adjustments			on cash						postretirement
							flow hedges						defined
													benefit plans
	Balance at January 1, 2014		$	15,141		$	(941	)	$	(89,547	)	$	(10	)	$	(75,357	)
	Other comprehensive income before reclassifications (net of tax)			(49,365	)		2,826			(40,266	)		(2,803	)		(89,608	)
	Amounts reclassified from accumulated other comprehensive income			–			471			9,553			71			10,095
	(net of tax)
	Net current period other comprehensive income (loss)			(49,365	)		3,297			(30,713	)		(2,732	)		(79,513	)
	Balance at December 31, 2014		$	(34,224	)	$	2,356		$	(120,260	)	$	(2,742	)	$	(154,870	)
	Balance at January 1, 2013		$	315		$	(424	)	$	(159,560	)	$	(4,297	)	$	(163,966	)
	Other comprehensive income before reclassifications (net of tax)			14,826			(1,198	)		54,906			4,187			72,721
	Amounts reclassified from accumulated other comprehensive income (net of tax)			–			681			15,107			100			15,888
	Net current period other comprehensive income (loss)			14,826			(517	)		70,013			4,287			88,609
	Balance at December 31, 2013		$	15,141		$	(941	)	$	(89,547	)	$	(10	)	$	(75,357	)
	Balance at January 1, 2012		$	(11,043	)	$	1,185		$	(153,002	)	$	(3,881	)	$	(166,741	)
	Other comprehensive income before reclassifications (net of tax)			11,358			(39	)		(18,657	)		(244	)		(7,582	)
	Amounts reclassified from accumulated other comprehensive income			–			(1,570	)		12,099			(172	)		10,357
	(net of tax)
	Net current period other comprehensive income (loss)			11,358			(1,609	)		(6,558	)		(416	)		2,775
	Balance at December 31, 2012		$	315		$	(424	)	$	(159,560	)	$	(4,297	)	$	(163,966	)
	The following table sets forth the amounts reclassified from accumulated other comprehensive income (losses) for the years indicated.
			Year ended December 31
	In thousands			2014			2013			2012
	Description											Line Item in Statements of Income
	Cash flow hedges (Note 20)
	(Gains) losses on cash flow hedges		$	655		$	945		$	(2,183	)	Costs of products sold
	Tax (benefit) expense			(184	)		(264	)		613		Income tax provision
	Net of tax			471			681			(1,570	)
	Retirement plan obligations (Note 11)
	Amortization of deferred benefit pension			2,503			2,470			2,025		Costs of products sold
	plan items
	Prior service costs			830			649			430		Selling, general and administrative
	Actuarial losses			8,965			16,399			13,764		Costs of products sold
				3,086			4,699			3,256		Selling, general and administrative
				15,384			24,217			19,475
				(5,831	)		(9,110	)		(7,376	)	Income tax provision
	Net of tax			9,553			15,107			12,099
	Amortization of deferred benefit other			(237	)		(384	)		(760	)	Costs of products sold
	plan items
	Prior service costs			(51	)		(96	)		(177	)	Selling, general and administrative
	Actuarial losses			331			494			511		Costs of products sold
				71			147			149		Selling, general and administrative
				114			161			(277	)
				(43	)		(61	)		105		Income tax provision
	Net of tax			71			100			(172	)
	Total reclassifications, net of tax		$	10,095		$	15,888		$	10,357

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	9	INCOME TAXES
	Income taxes are recognized for the amount of taxes payable or refundable for the current year and deferred tax liabilities and assets for the future tax consequences of events that have been recognized in our consolidated financial statements or tax returns. The effects of income taxes are measured based on enacted tax laws and rates.
	The provision for income taxes from operations consisted of the following:
			Year ended December 31
	In thousands		2014				2013			2012
	Current taxes
	Federal		$	3,291			$	625		$	8,869
	State			238				(4,365	)		3,386
	Foreign			24,027				17,268			9,516
				27,556				13,528			21,771
	Deferred taxes and other
	Federal			(3,975	)			(10,973	)		(5,456	)
	State			(147	)			(474	)		(920	)
	Foreign			(5,297	)			(38	)		4,167
				(9,419	)			(11,485	)		(2,209	)
	Income tax provision		$	18,137			$	2,043		$	19,562
	The amounts set forth above for total deferred taxes and other included a deferred tax benefit of $9.6 million, $15.1 million and $2.3 million in 2014, 2013 and 2012, respectively. Other taxes totaled an expense of $0.2 million, $3.6 million and $0.1 million in 2014, 2013 and 2012, respectively, associated with the deferred tax impact of uncertain tax positions.
	The following are the domestic and foreign components of pretax income from operations:
			Year ended December 31
	In thousands		2014				2013			2012
	United States		$	4,637			$	(3,052	)	$	24,525
	Foreign			82,746				72,253			54,416
	Total pretax income		$	87,383			$	69,201		$	78,941
	A reconciliation between the income tax provision, computed by applying the statutory federal income tax rate of 35% to income before income taxes, and the actual income tax provision is as follows:
			Year ended December 31
			2014				2013			2012
	Federal income tax provision at statutory rate			35	%			35	%		35	%
	State income taxes, net of federal income tax benefit			0.2				0.5			1.3
	Foreign income tax rate differential			(5.0	)			(5.0	)		(3.9	)
	Change in statutory tax rates			(2.2	)			(0.6	)		(0.8	)
	Tax credits			(2.0	)			(4.4	)		(0.5	)
	Change in unrecognized tax benefits, net			1.3				(22.7	)		0.4
	Permanent differences on non-U.S. earnings			(2.8	)			(0.4	)		–
	Cellulosic biofuel credit, net of incremental state tax and manufacturing deduction benefit			–				–			(6.1	)
	Valuation allowance			(2.7	)			–			–
	Other			(1.0	)			0.6			(0.6	)
	Provision for income taxes			20.8	%			3	%		24.8	%
	The sources of deferred income taxes were as follows at December 31:
			2014							2013
	In thousands			Current				Non			Current			Non
				Asset				current			Asset			current
				(Liability)				Asset			(Liability)			Asset
								(Liability)						(Liability)
	Reserves		$	5,032			$	7,987		$	5,001		$	7,919
	Compensation			3,087				5,075			3,111			5,000
	Post-retirement benefits			1,531				21,338			1,070			19,819
	Property			–				(89,432	)		–			(98,889	)
	Intangible Assets			–				(21,285	)		–			(28,918	)
	Pension			532				(30,412	)		802			(51,148	)
	Inventories			2,758				–			1,491			–
	Other			(783	)			1,171			893			2,377
	Tax carryforwards			8,560				12,660			10,322			16,922
	Subtotal			20,717				(92,898	)		22,690			(126,918	)
	Valuation allowance			(934	)			(2,288	)		(1,255	)		(4,905	)
	Total		$	19,783			$	(95,186	)	$	21,435		$	(131,823	)
	Current and non-current deferred tax assets and liabilities are included in the following balance sheet captions:
			December 31
	In thousands			2014				2013
	Prepaid expenses and		$	20,017			$	21,447
	other current assets
	Other assets			8,830				9,197
	Other current liabilities			234				12
	Deferred income taxes			104,016				141,020
	At December 31, 2014 we had state and foreign tax net operating loss (“NOL”) carryforwards of $86.9 million and $24.6 million, respectively. These NOL carryforwards are available to offset future taxable income, if any. The state NOL carryforwards expire between 2015 and 2031; certain foreign NOL carryforwards expire between 2019 and 2033.
The state and foreign NOL carryforwards on the income tax returns filed included unrecognized tax benefits taken in prior years. The NOLs for which a deferred tax asset is recognized for financial statement purposes in accordance with ASC 740 are presented net of these unrecognized tax benefits.
In addition, we had various state tax credit carryforwards totaling $0.4 million, which expire between 2015 and 2027, and foreign investment tax credits of $3.3 million which expire between 2020 and 2034.
As of December 31, 2014 and 2013, we established a valuation allowance of $3.2 million and $6.2 million, respectively, against net deferred tax assets, primarily due to uncertainty regarding the ability to utilize state and foreign tax NOL carryforwards and certain deferred foreign tax credits. The change in the valuation allowance was primarily due to a non-U.S. legal entity restructuring that made realization of the deferred tax assets more likely than not.
Tax credits and other incentives reduce tax expense in the year the credits are claimed. We recorded tax credits of $1.8 million, $3.0 million and $0.4 million in 2014, 2013 and 2012, respectively, related to research and development credits and the fuels tax credits.
At December 31, 2014 and 2013, unremitted earnings of subsidiaries outside the United States deemed to be permanently reinvested totaled $305.6 million and $288.8 million, respectively. Because the unremitted earnings of subsidiaries are deemed to be permanently reinvested as of December 31, 2014 and because we have no need for or plans to repatriate such earnings, no deferred tax liability has been recognized in our consolidated financial statements. It is not practicable to determine the amount of additional taxes that have not been provided.
As of December 31, 2014, 2013 and 2012, we had $14.9 million, $14.9 million and $30.4 million of gross unrecognized tax benefits, respectively. As of December 31, 2014, if such benefits were to be recognized, approximately $14.9 million would be recorded as a component of income tax expense, thereby affecting our effective tax rate.
A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows:
In millions			2014				2013			2012
Balance at January 1		$	14.9			$	30.4		$	29.7
Increases in tax positions for prior years			0.7				0.2			1.4
Decreases in tax positions for prior years			(0.5	)			(4.9	)		(1.0	)
Acquisition related:
Purchase Accounting			0.3				1.3			–
Increases in tax positions for current year			3.4				1.7			1.9
Settlements			(1.3	)			–			(0.4	)
Lapse in statutes of limitation			(2.6	)			(13.8	)		(1.2	)
Balance at December 31		$	14.9			$	14.9		$	30.4
We, or one of our subsidiaries, file income tax returns with the United States Internal Revenue Service, as well as various state and foreign authorities. The following table summarizes tax years that remain subject to examination by major jurisdiction:
		Open Tax Years
Jurisdiction		Examinations not yet		Examination in
		initiated		progress
United States
Federal		2013 – 2014			2011 – 2012
State		2010 – 2014			2011 – 2012
Canada(1)		2010 – 2014			2009
Germany(1)		2012 – 2014			2007 – 2011
France		2013 – 2014			2011 – 2012
United Kingdom		2013 – 2014			N/A
Philippines		2012 – 2014			2011
-1	includes provincial or similar local jurisdictions, as applicable.
The amount of income taxes we pay is subject to ongoing audits by federal, state and foreign tax authorities, which often result in proposed assessments. Management performs a comprehensive review of its global tax positions on a quarterly basis and accrues amounts for uncertain tax positions. Based on these reviews and the result of discussions and resolutions of matters with certain tax authorities and the closure of tax years subject to tax audit, reserves are adjusted as necessary. However, future results may include favorable or unfavorable adjustments to our estimated tax liabilities in the period the assessments are determined or resolved or as such statutes are closed. Due to potential for resolution of federal, state and foreign examinations, and the expiration of various statutes of limitation, it is reasonably possible our gross unrecognized tax benefits balance may decrease within the next twelve months by a range of zero to $5.2 million. Substantially all of this range relates to tax positions taken in the U.S. and in Germany.
We recognize interest and penalties related to uncertain tax positions as income tax expense. The following table summarizes information related to interest and penalties on uncertain tax positions:
		As of or for the year ended
		December 31,
In millions			2014				2013			2012
Accrued interest payable		$	0.6			$	0.6		$	1.4
Interest expense (income)			–				(0.8	)		(0.3	)
Penalties			–				–			–

StockBased_Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	10	STOCK-BASED COMPENSATION
	The P. H. Glatfelter Amended and Restated Long Term Incentive Plan (the “LTIP”) provides for the issuance of Glatfelter common stock to eligible participants in the form of restricted stock units, restricted stock awards, non-qualified stock options, performance shares, incentive stock options and performance units. As of December 31, 2014, there were 1,873,027 shares of common stock available for future issuance under the LTIP.
	Since the approval of the LTIP, we have issued to eligible participants restricted stock units, performance share awards and stock only stock appreciation rights (“SOSARs”).
	Restricted Stock Units (“RSUs”) and Performance Share Awards (“PSAs”)    Awards of RSUs and PSAs are made under our LTIP. The vesting of RSUs is generally based on the passage of time, generally on a graded scale over a three, four, and five-year period. Beginning in March of 2011, PSAs were issued annually to members of senior management and each respective grant cliff vests each December 31, assuming the achievement of predetermined, three-year cumulative performance targets. The performance measures include a minimum, target and maximum performance level providing the grantees an opportunity to receive more or less shares than targeted depending on actual financial performance. For both RSUs and PSAs, the grant date fair value of the awards, which is equal to the closing price per common share on the date of the award, is used to determine the amount of expense to be recognized over the applicable service period. Settlement of RSUs and PSAs will be made in shares of our common stock currently held in treasury.
	The following table summarizes RSU and PSA activity during the past three years:
	Units			2014			2013			2012
	Balance at January 1,			1,001,814			847,679			788,088
	Granted			178,882			315,196			209,021
	Forfeited			(47,379	)		(47,831	)		(52,800	)
	Shares delivered			(244,375	)		(113,230	)		(96,630	)
	Balance at December 31,			888,942			1,001,814			847,679
				2014			2013			2012
	Compensation expense		$	2,652		$	2,882		$	2,576
	The amount granted in 2014, 2013 and 2012 includes 101,743, 183,910 and 161,083 PSAs, respectively, exclusive of reinvested dividends. The performance period for the 2012 PSAs concluded on December 31, 2014 and, based on actual performance relative to target, approximately 60% of the award was issued to participants in 2015. The weighted average grant date fair value per unit for awards in 2014, 2013 and 2012 was $28.89, $22.34 and $15.49, respectively. As of December 31, 2014, unrecognized compensation expense for outstanding RSUs and PSAs totaled $4.0 million. The weighted average remaining period over which the expense will be recognized is 2.7 years.
	Stock Only Stock Appreciation Rights    The following table sets forth information related to outstanding SOSARS:
			2014						2013					2012
	SOSARS			Shares			Wtd Avg			Shares			Wtd Avg		Shares			Wtd Avg
							Exercise Price						Exercise Price					Exercise Price
	Outstanding at January 1,			1,977,133		$	13.91			2,121,454		$	12.93		2,298,288		$	12.35
	Granted			281,881			29.78			368,687			18.51		364,114			15.58
	Exercised			(364,465	)		13.99			(435,562	)		12.63		(500,074	)		12.06
	Canceled / forfeited			(29,842	)		19.36			(77,446	)		16.28		(40,874	)		14.31
	Outstanding at December 31,			1,864,707		$	16.2			1,977,133		$	13.91		2,121,454		$	12.93
	Exercisable at December 31,			1,285,998			12.94			1,330,816			12.58		1,469,537			12.3
	Vested and expected to vest			1,754,295						1,863,244					2,055,599
	SOSAR Grants
	Weighted average grant date fair value per share		$	9.81					$	5.74				$	4.94
	Aggregate grant date fair value (in thousands)		$	2,764					$	2,103				$	1,797
	Black-Scholes assumptions
	Dividend yield			1.48	%					2.16	%				2.31	%
	Risk free rate of return			1.74	%					1.01	%				1.02	%
	Volatility			37.59	%					39.58	%				41.48	%
	Expected life			6 yrs						6 yrs					6 yrs
	Compensation expense (in thousands)		$	2,086					$	1,591				$	1,448
	Under terms of the SOSAR, the recipients received the right to receive a payment in the form of shares of common stock equal to the difference, if any, in the fair market value of one share of common stock at the time of exercising the SOSAR and the exercise price. The SOSARs vest ratably over a three year period. As of December 31, 2014, the intrinsic value of SOSARs vested and expected to vest totaled $18.3 million. The remaining weighted average contractual life of outstanding SOSARs was 6.4 years as of December 31, 2014.

Retirement_Plans_and_Other_Pos

Retirement Plans and Other Post-Retirement Benefits	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Retirement Plans and Other Post-Retirement Benefits	11	RETIREMENT PLANS AND OTHER POST-RETIREMENT BENEFITS
	We provide non-contributory retirement benefits under both funded and unfunded plans to all U.S. employees and to certain non-U.S. employees. Participation and benefits under the plans are based upon the employees’ date of hire and the covered group in which that employee falls. U.S. benefits are based on either a unit-benefit formula for bargained hourly employees, or a final average pay formula or cash balance formula for salaried employees. Non-U.S. benefits are based, in the case of certain plans, on average salary and years of service and, in the case of other plans, on a fixed amount for each year of service. U.S. plan provisions and funding meet the requirements of the Employee Retirement Income Security Act of 1974. We use a December 31- measurement date for all of our defined benefit plans.
	We also provide certain health care benefits to eligible U.S.-based retired employees and exclude all salaried employees hired after January 1, 2008. These benefits include a comprehensive medical plan for retirees prior to age 65 and fixed supplemental premium payments to certain retirees over age 65 to help defray the costs of Medicare. Claims are paid as reported.
			Pension Benefits						Other Benefits
	In millions		2014			2013			2014			2013
	Change in Benefit Obligation
	Balance at beginning of year		$	487.7		$	528.4		$	54.8		$	63
	Service cost			10.4			11.6			1.5			2.9
	Interest cost			24.8			21.8			2.5			2.1
	Plan amendments			3.6			–			–			–
	Participant contributions			–			–			1.3			1.4
	Actuarial (gain)/loss			83.9			(44.0	)		4.5			(10.5	)
	Benefits paid			(31.5	)		(30.5	)		(4.8	)		(4.1	)
	Effect of currency rate changes			(1.3	)		0.4			–			–
	Balance at end of year		$	577.6		$	487.7		$	59.8		$	54.8
	Change in Plan Assets
	Fair value of plan assets at beginning of year		$	601.2		$	545.7		$	–		$	–
	Actual return on plan assets			66.3			84.2			–			–
	Total contributions			2			1.8			4.8			4.1
	Benefits paid			(31.5	)		(30.5	)		(4.8	)		(4.1	)
	Fair value of plan assets at end of year			638			601.2			–			–
	Funded status at end of year		$	60.4		$	113.5		$	(59.8	)	$	(54.8	)
	The December 31, 2014 measurement of projected benefit obligations reflects the adoption of new mortality assumptions. The assumed mortality rates were derived from actuarially determined expected lives. The impact of changing assumptions is reflected as an actuarial loss in the change in benefit obligation. Other items included in this caption include the changes in discount rates offset by better than expected return on assets.
	Amounts recognized in the consolidated balance sheets consist of the following as of December 31:
			Pension Benefits						Other Benefits
	In millions		2014			2013			2014			2013
	Other long-term assets		$	102		$	148.9		$	–		$	–
	Current liabilities			(2.0	)		(2.3	)		(3.7	)		(4.0	)
	Other long-term liabilities			(39.6	)		(33.1	)		(56.1	)		(50.8	)
	Net amount recognized		$	60.4		$	113.5		$	(59.8	)	$	(54.8	)
	The components of amounts recognized as “Accumulated other comprehensive income” consist of the following on a pre-tax basis:
			Pension Benefits						Other Benefits
	In millions		2014			2013			2014			2013
	Prior service cost/(credit)		$	15.1		$	14.8		$	(1.1	)	$	(1.4	)
	Net actuarial loss			181.3			131.9			5.5			1.4
	The accumulated benefit obligation for all defined benefit pension plans was $553.8 million and $471.1 million at December 31, 2014 and 2013, respectively.
	The weighted-average assumptions used in computing the benefit obligations above were as follows:
			Pension Benefits						Other Benefits
			2014			2013			2014			2013
	Discount rate – benefit obligation			4.21	%		5.2	%		3.89	%		4.52	%
	Future compensation growth rate			4			4			–			–
	The discount rates set forth above were estimated based on the modeling of expected cash flows for each of our benefit plans and selecting a portfolio of high-quality debt instruments with maturities matching the respective cash flows of each plan. The resulting discount rates as of December 31, 2014 ranged from 2.00% to 4.36% for pension plans and from 3.56% to 3.95% for other benefit plans.
	Information for pension plans with an accumulated benefit obligation in excess of plan assets was as follows:
	In millions			2014			2013
	Projected benefit obligation		$	41.7		$	35.4
	Accumulated benefit obligation			36.1			31.6
	Fair value of plan assets			–			–
	Net periodic benefit cost includes the following components:
			Year Ended December 31
	In millions			2014			2013			2012
	Pension Benefits
	Service cost		$	10.4		$	11.6		$	11.3
	Interest cost			24.8			21.8			23
	Expected return on plan assets			(43.9	)		(43.4	)		(42.2	)
	Amortization of prior service cost			3.3			3.1			2.5
	Amortization of actuarial loss			12.1			21.1			17
	Total net periodic benefit cost		$	6.7		$	14.2		$	11.6
	Other Benefits
	Service cost		$	1.5		$	2.9		$	2.8
	Interest cost			2.5			2.1			2.4
	Expected return on plan assets			–			–			(0.5	)
	Amortization of prior service cost/(credit)			(0.3	)		(0.5	)		(0.9	)
	Amortization of actuarial loss			0.4			0.6			0.7
	Total net periodic benefit cost		$	4.1		$	5.1		$	4.5
The prior service cost and actuarial net loss for our defined benefit pension plans that will be amortized from accumulated other comprehensive income (loss) into our results of operations as a component of net periodic benefit cost over the next fiscal year are $3.1 million and $18.3 million, respectively. The comparable amounts of expected amortization for other benefit plans are a credit of $0.3 million and expense of $0.4 million, respectively.
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss) were as follows:
		Year Ended
		December 31
In millions		2014			2013
Pension Benefits
Actuarial (gain) loss		$	61.5		$	(84.7	)
Plan amendments			3.6			–
Amortization of prior service cost			(3.3	)		(3.1	)
Amortization of actuarial losses			(12.1	)		(21.1	)
Total recognized in other comprehensive (income) loss			49.7			(108.9	)
Total recognized in net periodic benefit cost and other comprehensive (income) loss		$	56.4		$	(94.7	)
Other Benefits
Actuarial (gain) loss		$	4.5		$	(10.5	)
Amortization of prior service cost			0.3			0.5
Amortization of actuarial losses			(0.4	)		(0.6	)
Total recognized in other comprehensive (income) loss			4.4			(10.6	)
Total recognized in net periodic benefit cost and other comprehensive (income) loss		$	8.5		$	(5.5	)
The weighted-average assumptions used in computing the net periodic benefit cost information above were as follows:
		Year Ended December 31
		2014			2013			2012
Pension Benefits
Discount rate – benefit expense			5.2	%		4.28	%		5.09	%
Future compensation growth rate			4			4			4
Expected long-term rate of return on plan assets			8			8.5			8.5
Other Benefits
Discount rate – benefit expense			4.52	%		3.58	%		4.45	%
Expected long-term rate of return on plan assets			–			–			8.5
To develop the expected long-term rate of return assumption, we considered the historical returns and the future expected returns for each asset class, as well as the target asset allocation of the pension portfolio.
Assumed health care cost trend rates used to determine benefit obligations at December 31 were as follows:
		2014			2013
Health care cost trend rate assumed for next year			7.46	%		7.46	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)			4.5			4.5
Year that the rate reaches the ultimate rate			2028			2028
Assumed health care cost trend rates have a significant effect on the amounts reported for health care plans. A one percentage-point change in assumed health care cost trend rates would have the following effects:
		One Percentage Point
In millions		Increase			Decrease
Effect on:
Post-retirement benefit obligation		$	5.3		$	4.7
Total of service and interest cost components			0.4			0.4
Plan Assets    All pension plan assets in the U.S. are invested through a single master trust fund. The strategic asset allocation for this trust fund is selected by management, reflecting the results of comprehensive asset and liability modeling. The general principles guiding U.S. pension asset investment policies are those embodied in the Employee Retirement Income Security Act of 1974 (ERISA). These principles include discharging our investment responsibilities for the exclusive benefit of plan participants and in accordance with the “prudent expert” standard and other ERISA rules and regulations. We establish strategic asset allocation percentage targets and appropriate benchmarks for significant asset classes with the aim of achieving a prudent balance between return and risk.
Investments and decisions will be made solely in the interest of the Plan’s participants and beneficiaries, and for the exclusive purpose of providing benefits accrued thereunder. The primary goal of the Plan is to ensure the solvency of the Plan over time and thereby meet its distribution objectives. All investments in the Plan will be made in accordance with ERISA and other applicable statutes.
Risk is minimized by diversification by asset class, by style of each manager and by sector and industry limits when applicable. The target allocation for the Plan assets are:
Domestic Equity
Large cap			35	%
Small and mid cap			12
International equity			13
Real Estate Investment
Trusts (REIT)			5
Fixed income, cash and cash equivalents			35
Diversification is achieved by:
	i.	placing restrictions on the percentage of equity investments in any one company, percentage of investment in any one industry, limiting the amount of assets placed with any one manager; and
	ii.	setting targets for duration of fixed income securities, maintaining a certain level of credit quality, and limiting the amount of investment in a single security and in non-investment grade paper.
A formal asset allocation review is done periodically to ensure that the Plan has an appropriate asset allocation based on the Plan’s projected benefit obligations. The target return for each equity and fixed income manager will be one that places the manager’s performance in the top 40% of its peers and on a gross basis, exceeds that of the manager’s respective benchmark index. The target return for cash and cash equivalents is a return that at least equals that of the 90-day T-bills.
The Investment Policy statement lists specific categories of securities or activities that are prohibited including options, futures, commodities, hedge funds, limited partnerships, and our stock.
The table below presents the fair values of our benefit plan assets by level within the fair value hierarchy, as described in Note 2:
		December 31, 2014
In millions			Total			Level 1			Level 2			Level 3
Domestic Equity
Large cap		$	187.6		$	187.6		$	–		$	–
Small and mid cap			61.1			61.1			–			–
International equity			104.5			65.1			39.4			–
REIT			31.6			31.6			–			–
Fixed income			235			27.3			207.7			–
Cash and equivalents			18.2			–			18.2			–
Total		$	638		$	372.7		$	265.3		$	–
		31-Dec-13
In millions			Total			Level 1			Level 2			Level 3
Domestic Equity
Large cap			$204.60			$204.60		$	–		$	–
Small and mid cap			68.1			68.1			–			–
International equity			114.3			73.7			40.6			–
REIT			25.9			25.9			–			–
Fixed income			171.6			40.4			131.2			–
Cash and equivalents			16.7			–			16.7			–
Total		$	601.2		$	412.7		$	188.5		$	–
Cash Flow    We were not required to make contributions to our qualified pension plan in 2014 nor do we expect to make any to this plan in 2015. Benefit payments expected to be made in 2015 under our non-qualified pension plans and other benefit plans are summarized below:
In thousands
Nonqualified pension plans		$	2,108
Other benefit plans			3,769
The following benefit payments under all pension and other benefit plans, and giving effect to expected future service, as appropriate, are expected to be paid:
In thousands			Pension			Other
			Benefits			Benefits
2015		$	36,012		$	3,769
2016			35,826			3,987
2017			36,061			4,450
2018			35,751			4,808
2019			35,919			5,202
2020 through 2024			186,858			40,001
Defined Contribution Plans    We maintain 401(k) plans for certain hourly and salaried employees. Employees may contribute up to 50% of their earnings, subject to certain restrictions. We will match a portion of the employee’s contribution, subject to certain limitations, in the form of shares of Glatfelter common stock out of treasury. The expense associated with our 401(k) match was $2.0 million, $1.9 million and $1.7 million in 2014, 2013 and 2012, respectively.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventories	12	INVENTORIES
	Inventories, net of reserves were as follows:
			December 31
	In thousands			2014		2013
	Raw materials		$	61,266	$	59,440
	In-process and finished			117,580		109,578
	Supplies			69,859		67,292
	Total		$	248,705	$	236,310
	We value all of our U.S. inventories, excluding supplies, on the LIFO method. If we had valued these inventories using the first-in, first-out method, inventories would have been $25.4 million and $24.5 million higher than reported at December 31, 2014 and 2013, respectively.

Plant_Equipment_and_Timberland

Plant, Equipment and Timberlands	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Plant, Equipment and Timberlands	13	PLANT, EQUIPMENT AND TIMBERLANDS
	Plant, equipment and timberlands at December 31 were as follows:
	In thousands			2014			2013
	Land and buildings		$	208,230		$	206,891
	Machinery and equipment			1,265,317			1,279,264
	Furniture, fixtures, and other			157,730			159,674
	Accumulated depreciation			(989,093	)		(976,645	)
				642,184			669,184
	Construction in progress			49,078			47,271
	Asset retirement obligation, net			3,021			4,748
	Timberlands, less depletion			3,325			2,137
	Total		$	697,608		$	723,340
	As of December 31, 2014 and 2013, we had $16.3 million and $11.9 million, respectively, of accrued capital expenditures.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	14	GOODWILL AND INTANGIBLE ASSETS
	The following table sets forth information with respect to goodwill and other intangible assets:
			December 31
	In thousands			2014			2013
	Goodwill – Composite Fibers		$	84,137		$	95,948
	Specialty Papers
	Customer relationships		$	6,155		$	6,155
	Composite Fibers
	Tradename			5,902			10,325
	Technology and related			41,749			46,038
	Customer relationships and related			37,421			42,251
	Advanced Airlaid Materials
	Technology and related			1,500			1,623
	Customer relationships and related			3,042			3,445
	Total intangibles			95,769			109,837
	Accumulated amortization			(18,671	)		(13,756	)
	Net intangibles		$	77,098		$	96,081
	The change in goodwill was due to foreign currency translation adjustments. Other than non-amortizable goodwill and tradename, intangible assets are amortized on a straight-line basis. Customer relationships are amortized over periods ranging from 10 years to 14 years and technology and related intangible assets are amortized over periods ranging from 14 years to 20 years. The following table sets forth information pertaining to amortization of intangible assets:
	In thousands			2014			2013			2012
	Aggregate amortization expense:		$	6,136		$	4,511		$	1,778
	Estimated amortization expense:
	2015			5,859
	2016			5,398
	2017			5,124
	2018			5,124
	2019			5,124
	The remaining weighted average useful life of intangible assets was 14.7 years at December 31, 2014.

Other_LongTerm_Assets

Other Long-Term Assets	12 Months Ended
	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other Long-Term Assets	15	OTHER LONG-TERM ASSETS
	Other long-term assets consist of the following:
			December 31
	In thousands			2014		2013
	Pension		$	102,007	$	148,849
	Other			26,032		27,610
	Total		$	128,039	$	176,459

Other_Current_Liabilities

Other Current Liabilities	12 Months Ended
	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Other Current Liabilities	16	OTHER CURRENT LIABILITIES
	Other current liabilities consist of the following:
			December 31
	In thousands			2014		2013
	Accrued payroll and benefits		$	39,471	$	41,492
	Other accrued compensation and retirement benefits			7,920		8,372
	Income taxes payable			3,502		6,546
	Accrued rebates			18,910		20,208
	Other accrued expenses			41,274		46,019
	Total		$	111,077	$	122,637

LongTerm_Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Long-Term Debt	17	LONG-TERM DEBT
	Long-term debt is summarized as follows:
			December 31
	In thousands			2014			2013
	Revolving credit facility, due Nov. 2016		$	90,555		$	133,540
	5.375% Notes, due Oct. 2020			250,000			250,000
	2.40% Term Loan, due Jun. 2022			12,155			–
	2.05% Term Loan, due Mar. 2023			51,902			58,785
	Total long-term debt			404,612			442,325
	Less current portion			(5,734	)		–
	Long-term debt, net of current portion		$	398,878		$	442,325
	On November 21, 2011, we entered into an amendment to our revolving credit agreement with a consortium of banks (the “Revolving Credit Facility”) which increased the amount available for borrowing to $350 million, extended the maturity of the facility to November 21, 2016, and instituted a lower interest rate pricing grid.
	For all U.S. dollar denominated borrowings under the Revolving Credit Facility, the borrowing rate is, at our option, (a) the bank’s base rate which is equal to the greater of i) the prime rate; ii) the federal funds rate plus 50 basis points plus an applicable spread ranging from 25 basis points to 125 basis points based on our corporate credit ratings determined by Standard & Poor’s Rating Services and Moody’s Investor Service, Inc. (the “Corporate Credit Rating”); or iii) the daily Euro-rate plus 100 basis points; or (b) the daily Euro-rate plus an applicable margin ranging from 125 basis points to 225 basis points based on the Corporate Credit Rating. For non-US dollar denominated borrowings, interest is based on (b) above.
	The Revolving Credit Facility contains a number of customary covenants for financings of this type that, among other things, restrict our ability to dispose of or create liens on assets, incur additional indebtedness, repay other indebtedness, limits certain intercompany financing arrangements, make acquisitions and engage in mergers or consolidations. We are also required to comply with specified financial tests and ratios including: i) maximum net debt to earnings before interest, taxes, depreciation and amortization (“EBITDA”) ratio (the “leverage ratio”); and ii) a consolidated EBITDA to interest expense ratio. The most restrictive of our covenants is a maximum leverage ratio of 3.5x. As of December 31, 2014, the leverage ratio, as calculated in accordance with the definition in our credit agreement, was 2.15x, within the limits set forth in our credit agreement. A breach of these requirements would give rise to certain remedies under the Revolving Credit Facility, among which are the termination of the agreement and accelerated repayment of the outstanding borrowings plus accrued and unpaid interest under the credit facility.
	On October 3, 2012, we completed a private placement offering of $250.0 million aggregate principal amount of 5.375% Senior Notes due 2020 (the “5.375% Notes”). The 5.375% Notes are fully and unconditionally guaranteed, jointly and severally, by PHG Tea Leaves, Inc., Mollanvick, Inc., and Glatfelter Holdings, LLC (the “Guarantors”).
	Interest on the 5.375% Notes is payable semiannually in arrears on April 15 and October 15, commencing on April 15, 2013.
	The 5.375% Notes are redeemable, in whole or in part, at anytime on or after October 15, 2016 at the redemption prices specified in the applicable Indenture. Prior to October 15, 2016, we may redeem some or all of the Notes at a “make-whole” premium as specified in the Indenture. These Notes and the guarantees of the notes are senior obligations of the Company and the Guarantors, respectively, rank equally in right of payment with future senior indebtedness of the Company and the Guarantors and will mature on October 15, 2020.
	The 5.375% Notes contain various covenants customary to indebtedness of this nature including limitations on i) the amount of indebtedness that may be incurred; ii) certain restricted payments including common stock dividends; iii) distributions from certain subsidiaries; iv) sales of assets; v) transactions amongst subsidiaries; and vi) incurrence of liens on assets. In addition, the 5.375% Notes contain cross default provisions that could result in all such notes becoming due and payable in the event of a failure to repay debt outstanding under the Revolving Credit Agreement at maturity or a default under the Revolving Credit Agreement that accelerates the debt outstanding thereunder. As of December 31, 2014, we met all of the requirements of our debt covenants.
	Glatfelter Gernsbach GmbH & Co. KG (“Gernsbach”), a wholly-owned subsidiary of ours, entered into two separate agreements with IKB Deutsche Industriebank AG, Düsseldorf (“IKB”). Pursuant to the first agreement, dated April 11, 2013, Gernsbach borrowed approximately €42.7 million (or $57.6 million) aggregate principal amount (the “2013 IKB Loan”). The 2013 IKB Loan is repayable in 32 quarterly installments beginning on June 30, 2015 and ending on March 31, 2023 and bears interest at a rate of 2.05% per annum.
	Pursuant to the second agreement with IKB dated September 4, 2014, Gernsbach borrowed €10.0 million (or $12.6 million) aggregate principal amount (the “2014 IKB Loan”). The 2014 IKB Loan is repayable in 27 quarterly installments beginning on September 30, 2015 and ending on June 30, 2022 and bears interest at a rate of 2.40% per annum. Interest on the IKB Loan or portion thereof is payable quarterly in each year of the term of the loan with interest accruing from the date the loan or portion thereof is drawn.
	The IKB loans provide for representations, warranties and covenants customary for financings of these types. The financial covenants contained in each of the IKB loans, which relate to the minimum ratio of consolidated EBITDA to consolidated interest expense and the maximum ratio of consolidated total net debt to consolidated adjusted EBITDA, will be calculated by reference to our Amended and Restated Credit Agreement, dated November 21, 2011.
	Aggregated unamortized deferred debt issuance costs incurred in connection with all of our outstanding debt totaled $5.1 million at December 31, 2014 and are reported under the caption “Other assets” in the accompanying consolidated balance sheets. The deferred costs are being amortized on a straight line basis over the life of the underlying instruments. Amortization expense related to deferred debt issuance costs totaled $1.3 million in 2014.
	The following schedule sets forth the amortization of our term loan agreements together with the maturity of our other long-term debt during the indicated year.
	In thousands
	2015		$	5,734
	2016			98,779
	2017			8,224
	2018			8,224
	2019			8,224
	Thereafter			275,427
	P. H. Glatfelter Company guarantees all debt obligations of its subsidiaries. All such obligations are recorded in these consolidated financial statements.
	As of December 31, 2014 and 2013, we had $5.3 million and $5.2 million, respectively, of letters of credit issued to us by certain financial institutions. The letters of credit, which reduce amounts available under our revolving credit facility, primarily provide financial assurances for the benefit of certain state workers compensation insurance agencies in conjunction with our self-insurance program. We bear the credit risk on this amount to the extent that we do not comply with the provisions of certain agreements. No amounts are outstanding under the letters of credit.

Asset_Retirement_Obligation

Asset Retirement Obligation	12 Months Ended
	Dec. 31, 2014
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligation	18	ASSET RETIREMENT OBLIGATION
	During 2008, we recorded $11.5 million, net present value, of asset retirement obligations related to the legal requirement to close several lagoons at the Spring Grove, PA facility. Historically, lagoons were used to dispose of residual waste material. Closure of the lagoons, which is expected to be completed in 2016, will be accomplished by filling the lagoons, installing a non-permeable liner which will be covered with soil to construct the required cap over the lagoons. The amount referred to above, in addition to upward revisions, was accrued with a corresponding increase in the carrying value of the property, equipment and timberlands caption on the consolidated balance sheet. The amount capitalized is being amortized as a charge to operations on the straight-line basis in relation to the expected closure period.
	Following is a summary of the reserve for asset retirement obligations for the periods indicated:
	In thousands			2014			2013
	Balance at January 1,		$	5,032		$	8,882
	Accretion			145			229
	Payments			(827	)		(2,824	)
	Gain			(236	)		(1,255	)
	Balance at December 31,		$	4,114		$	5,032
	During 2014 and 2013, we recognized gains of $0.2 million and $1.3 million, respectively, related to the progress of closure activities for a portion of the lagoons required to be retired. The gains are reflected in the accompanying consolidated statements of income under the caption “costs of products sold.”
	The following table summarizes the line items in the accompanying consolidated balance sheets where the asset retirement obligations are recorded:
			December 31
	In thousands			2014			2013
	Other current liabilities		$	2,855		$	915
	Other long-term liabilities			1,259			4,117
	Total		$	4,114		$	5,032

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	19	FAIR VALUE OF FINANCIAL INSTRUMENTS
	The amounts reported on the consolidated balance sheets for cash and cash equivalents, accounts receivable and short-term debt approximate fair value. The following table sets forth the carrying value and fair value of long-term debt as of December 31:
			December 31, 2014				December 31, 2013
	In thousands			Carrying		Fair		Carrying		Fair
				Value		Value		Value		Value
	Variable rate debt		$	90,555	$	90,555	$	133,540	$	133,540
	Fixed-rate bonds			250,000		255,470		250,000		254,533
	2.05% Term loan			51,902		53,106		58,785		57,952
	2.40% Term loan			12,155		12,626		–		–
	Total		$	404,612	$	411,757	$	442,325	$	446,025
	As of December 31, 2014 and 2013, we had $250.0 million of 5.375% fixed rate bonds. These bonds are publicly registered, but thinly traded. Accordingly, the values set forth above for the bonds, as well as our other debt instruments, are based on observable inputs and other relevant market data (Level 2). The fair value of financial derivatives is set forth below in Note 20.

Financial_Derivatives_and_Hedg

Financial Derivatives and Hedging Activities	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Derivatives and Hedging Activities	20	FINANCIAL DERIVATIVES AND HEDGING ACTIVITIES
	As part of our overall risk management practices, we enter into financial derivatives primarily designed to either i) hedge foreign currency risks associated with forecasted transactions – “cash flow hedges”; or ii) mitigate the impact that changes in currency exchange rates have on intercompany financing transactions and foreign currency denominated receivables and payables – “foreign currency hedges.”
	Derivatives Designated as Hedging Instruments – Cash Flow Hedges    We use currency forward contracts as cash flow hedges to manage our exposure to fluctuations in the currency exchange rates on certain forecasted production costs expected to be incurred over a maximum of twelve months. Currency forward contracts involve fixing the EUR-USD exchange rate or USD-CAD for delivery of a specified amount of foreign currency on a specified date.
	We designate certain currency forward contracts as cash flow hedges of forecasted raw material purchases or other production costs with exposure to changes in foreign currency exchange rates. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges of foreign exchange risk is deferred as a component of accumulated other comprehensive income in the accompanying consolidated balance sheets and is subsequently reclassified into cost of products sold in the period that inventory produced using the hedged transaction affects earnings. The ineffective portion of the change in fair value of the derivative is recognized directly to earnings and reflected in the accompanying consolidated statements of income as non-operating income (expense) under the caption “Other-net.”
	We had the following outstanding derivatives that were used to hedge foreign exchange risks associated with forecasted transactions and designated as hedging instruments:
			December 31
	In thousands			2014			2013
	Derivative			Sell (Buy) Notional
	Sell / Buy
	Euro / U.S. dollar			(32,527	)		(27,105	)
	U.S. dollar / Canadian dollar			(10,036	)		(13,077	)
	Euro / Philippine peso			(523,313	)		–
	British Pound / Philippine peso			(260,535	)		–
	Euro / British Pound			4,592			–
	These contracts have maturities of twelve months or less.
	Derivatives Not Designated as Hedging Instruments – Foreign Currency Hedges    We also enter into forward foreign exchange contracts to mitigate the impact changes in currency exchange rates have on balance sheet monetary assets and liabilities. None of these contracts are designated as hedges for financial accounting purposes and, accordingly, changes in value of the foreign exchange forward contracts and in the offsetting underlying on-balance-sheet transactions are reflected in the accompanying consolidated statements of income under the caption “Other, net.”
			December 31
	In thousands			2014			2013
	Derivative			Sell (Buy) Notional
	Sell / Buy
	U.S. dollar / British Pound			9,000			6,000
	Euro / British Pound			(3,000	)		(8,000	)
	Euro / British Pound			2,000			5,000
	Canadian dollar / U.S. dollar			–			2,000
	U.S. dollar / Euro			4,000			2,000
	Euro / U.S. dollar			–			9,000
	These contracts have maturities of one month from the date originally entered into.
	Fair Value Measurements
	The following table summarizes the fair values of derivative instruments as of December 31 for the year indicated and the line items in the accompanying consolidated balance sheets where the instruments are recorded:
			December 31						December 31
	In thousands			2014			2013			2014			2013
	Balance sheet caption			Prepaid Expenses						Other Current
				and Other						Liabilities
				Current Assets
	Designated as hedging:
	Forward foreign currency exchange contracts		$	3,106		$	–			$394		$	1,163
	Not designated as hedging:
	Forward foreign currency exchange contracts		$	70		$	36			$161		$	46
	The amounts set forth in the table above represent the net asset or liability giving effect to rights of offset with each counterparty.
	The following table summarizes the amount of income or loss from derivative instruments recognized in our results of operations for the periods indicated and the line items in the accompanying consolidated statements of income where the results are recorded:
			Year ended December 31
	In thousands			2014			2013			2012
	Designated as hedging:
	Forward foreign currency exchange contracts:
	Effective portion – cost of products sold		$	(655	)	$	(945	)	$	2,183
	Ineffective portion – other – net			184			38			311
	Not designated as hedging:
	Forward foreign currency exchange contracts:
	Other – net		$	1,599		$	(455	)	$	(696	)
	The impact of activity not designated as hedging was substantially all offset by the remeasurement of the underlying on-balance sheet item.
	The fair value hierarchy consists of three broad levels, which gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The three levels of the fair value hierarchy are described in Note 2.
	The fair values of the foreign exchange forward contracts are considered to be Level 2. Foreign currency forward contracts are valued using foreign currency forward and interest rate curves. The fair value of each contract is determined by comparing the contract rate to the forward rate and discounting to present value. Contracts in a gain position are recorded in the accompanying consolidated balance sheets under the caption “Prepaid expenses and other current assets” and the value of contracts in a loss position is recorded under the caption “Other current liabilities.”
	A rollforward of fair value amounts recorded as a component of accumulated other comprehensive income is as follows:
	In thousands			2014			2013
	Balance at January 1,		$	(1,296	)	$	(599	)
	Deferred (losses) gains on cash flow hedges			3,923			(1,642	)
	Reclassified to earnings			655			945
	Balance at December 31,		$	3,282		$	(1,296	)
	We expect substantially all of the amounts recorded as a component of accumulated other comprehensive income will be realized in results of operations within the next twelve months and the amount ultimately recognized will vary depending on actual market rates.
	Credit risk related to derivative activity arises in the event a counterparty fails to meet its obligations to us. This exposure is generally limited to the amounts, if any, by which the counterparty’s obligations exceed our obligation to them. Our policy is to enter into contracts only with financial institutions which meet certain minimum credit ratings.

Shareholders_Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Shareholders' Equity	21	SHAREHOLDERS’ EQUITY
	The following table summarizes outstanding shares of common stock:
			Year ended December 31
	In thousands			2014		2013	2012
	Shares outstanding at beginning of year			43,130		42,784	42,650
	Shares repurchased			(464	)	–	(374	)
	Treasury shares issued for:
	Restricted stock awards			162		86	76
	401(k) plan			116		123	152
	Employee stock options			110		137	280
	exercised
	Shares outstanding at end of year			43,054		43,130	42,784

Share_Repurchases

Share Repurchases	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Share Repurchases	22	SHARE REPURCHASES
	On May 1, 2014, our Board of Directors approved a $25 million increase to the share repurchase program and extended the expiration date to May 1, 2016. Under the revised program, we may repurchase up to $50 million of outstanding common stock. The following table summarizes share repurchases made under this program through December 31, 2014:
			shares		(thousands)
	Authorized amount			n/a	$	50,000
	Repurchases			755,310		(16,627	)
	Remaining authorization				$	33,373
	During 2014, we repurchased 464,190 shares for $12.2 million.

Commitments_Contingencies_and_

Commitments, Contingencies and Legal Proceedings	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Legal Proceedings	23	COMMITMENTS, CONTINGENCIES AND LEGAL PROCEEDINGS
	Contractual Commitments    The following table summarizes the minimum annual payments due on noncancelable operating leases and other similar contractual obligations having initial or remaining terms in excess of one year:
	In thousands			Leases		Other
	2015		$	6,244	$	71,402
	2016			3,742		23,818
	2017			2,256		1,176
	2018			1,392		536
	2019			394		98
	Thereafter			1		–
	Other contractual obligations primarily represent minimum purchase commitments under energy supply contracts and other purchase obligations.
	At December 31, 2014, required minimum annual payments due under operating leases and other similar contractual obligations aggregated $14.0 million and $97.0 million, respectively.
	Fox River – Neenah, Wisconsin
	Background.    We have significant uncertainties associated with environmental claims arising out of the presence of polychlorinated biphenyls (“PCBs”) in sediments in the lower Fox River, on which our former Neenah facility was located, and in the Bay of Green Bay Wisconsin (collectively, the “Site”). Since the early 1990s, the United States, the State of Wisconsin and two Indian tribes (collectively, the “Governments”) have pursued a cleanup of a 39-mile stretch of river from Little Lake Butte des Morts into Green Bay and natural resource damages (“NRDs”).
	The potentially responsible parties (“PRPs”) consisted of us, Appvion, Inc. (formerly known as Appleton Papers Inc.), CBC Coating, Inc. (formerly known as Riverside Paper Corporation), Georgia-Pacific Consumer Products, L.P. (“Georgia Pacific”, formerly known as Fort James Operating Company), Menasha Corporation, NCR Corporation (“NCR”), U.S. Paper Mills Corp., and WTM I Company. After giving effect to settlements reached with the Governments, the remaining PRPs consist of us, Georgia-Pacific Consumer Products, L.P. and NCR.
	The United States Environmental Protection Agency (“EPA”) has divided the Site into five “operable units”, including the most upstream and portion of the site on which our facility was located (“OU1”) and four downstream reaches of the river and bay (“OU2-5”).
	The Site has been subject to certain studies and the parties conducted certain demonstration projects and completed certain interim cleanups. The permanent cleanup, known as a “remedial action” under the Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA” or “Superfund”), consists of sediment dredging, installation of engineered caps, and placement of sand covers in various areas in the bed of the river.
	We and WTM I Company implemented the remedial action in OU1 under a consent decree with the Governments; Menasha Corporation made a financial contribution to that work. That project began in 2004 and the work is complete other than on-going monitoring and maintenance.
	For the downstream portion of the Site, referred to as OU2-5, work has proceeded primarily under a Unilateral Administrative Order (“UAO”) issued in November 2007 by the EPA to us and seven other respondents. The remedial actions have been funded, to date, primarily by NCR and its indemnitors, including Appvion, Inc. (formerly known as Appleton Papers Inc.). Work is scheduled to continue in OU2-5 through 2017, with monitoring and maintenance to follow.
	Although we have not contributed funds towards remedial actions other than in OU1, as more fully discussed below, significant uncertainties exist pertaining to the ultimate allocation of OU2-5 remediation costs as well as the shorter term funding of the remedial actions for OU2-5.
	Cost estimates.    Estimates of the Site remediation change over time as we, or others, gain additional data and experience at the Site. In addition, disagreement exists over the likely costs for some of this work. On October 14, 2014, the Governments represented to the United States District Court in Green Bay that $1.1 billion provided an “upper end estimate of total past and future response costs” including a $100 million “uncertainty premium for future response costs.” Based upon estimates made by the Governments and independent estimates commissioned by various potentially responsible parties, we have no reason to disagree with the Governments’ assertion. Much of that amount has already been incurred, including approximately $100 million for OU1 and what we believe to be approximately $500 million for OU2-5.
	The Governments previously indicated their expectation to have work in OU2-5 completed at a rate estimated to cost at least $70 million in 2015 and 2016 and at lower rates thereafter. We understand the cost for the 2015 dredging season may exceed $90 million.
	As the result of a partial settlement, Georgia-Pacific has no obligation to pay for work upstream of a line near Georgia-Pacific’s Green Bay West Mill located in OU4. We believe substantially all in-water work upstream of this line has been completed as of the end of the 2014 dredging season.
	NRDs.    The Governments’ NRD assessment documents originally claimed we are jointly and severally responsible for NRDs with a value between $176 million and $333 million. The Governments claimed this range should be inflated to current dollars and then certain unreimbursed past assessment costs should be added, so the range of their claim was $287 million to $423 million in 2009.
	However, on October 14, 2014, the Governments represented to the district court that if certain settlements providing $45.9 million toward compensation of NRDs were approved, the total NRD recovery would amount to $105 million. The Governments would consider those recoveries adequate and they would withdraw their claims against us and NCR for additional compensation of NRDs. Some of the settling parties, including all of the settling parties contributing the $45.9 million, have waived their rights to seek contribution from us of the settlement amounts. We previously paid a portion of the other $59 million in earlier settlements.
	Allocation Litigation.    In January 2008, NCR and Appvion brought an action in the federal district court in Green Bay to allocate among all of the parties responsible for this Site all of the costs incurred by the Governments, all of the costs incurred by the parties, and all of the NRDs owed to the Natural Resource Trustees. We have previously referred to this case as the “Whiting Litigation.” After several summary judgment rulings and a trial, the trial court entered judgment in the Whiting Litigation, allocating to NCR 100 percent of the costs (a) of the OU2-5 cleanup, (b) NRDs, (c) past and future costs incurred by the Governments in OU2-5, and (d) past and future costs incurred by any of the other parties net of an appropriate equitable adjustment for insurance recoveries. As to Glatfelter, NCR was judged liable to us for $4.28 million and any future costs or damages we may incur. NCR was held not responsible for costs incurred in OU1.
	All parties appealed the Whiting Litigation judgment to the United States Court of Appeals for the Seventh Circuit. On September 25, 2014, that court affirmed, holding that if knowledge and fault were the only equitable factors governing allocation of costs and NRDs at the Site, NCR would owe 100% of all costs and damages in OU2-5, but would not have a share of costs in OU1, which is upstream of the outfall of the facilities for which NCR is responsible. However, the court of appeals vacated the judgment and remanded the case for the district court’s further consideration of whether any other equitable factors might cause the district court to alter its allocation.
	We contend the district court should, after further consideration, reinstate the 100%, or some similar very high, allocation to NCR of all the costs, and we should bear no share or a very small share. However, NCR has taken a contrary position and has sought contributions from others for future work until all allocation issues are resolved. In order to ensure compliance with the UAO and to ensure work continues in OU2-5, in the absence of an agreement amongst us, NCR and Georgia-Pacific, it is possible the Governments may attempt to force the funding while a final allocation in the Whiting Litigation is pursued. We cannot predict the outcome of any such actions or any possible resulting litigation. Therefore, in the interim it is conceivable we may be required to contribute resources to fund a portion of the annual cost of remedial actions in OU2-5. Although we are unable to determine with any degree of certainty the amount we may fund, those amounts could be significant. Any amounts we pay or any other party pays in the interim are likely to be subject to reallocation when the Whiting Litigation is resolved. The district court has established a schedule for the Whiting Litigation under which it would hold a trial in June 2016 on remaining issues.
	Appvion and NCR have had a cost-sharing agreement since at least 1998. The court of appeals held if Appvion incurred any recoverable costs because the Governments had named Appvion as a potentially responsible party rather than as a consequence of Appvion’s obligations to NCR, then Appvion may have a right to recover those costs under CERCLA. We contend Appvion has no such costs, and if it did, we would have a right to contribution of any recovery against NCR and others.
	Enforcement Litigation.    In October 2010, the United States and the State of Wisconsin brought an action (“Government Action”) in the federal district court in Green Bay against us and 13 other defendants seeking (a) to recover all of their unreimbursed past costs, (b) a declaration of joint and several liability for all of their future costs, (c) NRDs, and (d) a declaration of liability of all of the respondents on the UAO to perform the remedy in OU2-5 as required by the UAO and a mandatory permanent injunction to the same effect. The last of these claims was tried in 2012, and in May 2013, the district court enjoined us, NCR, WTM I, and Menasha Corp. to perform the work under the UAO. As the result of partial settlements, U.S. Paper Mills Corp. and Georgia-Pacific Consumer Products L.P. agreed to joint and several liability for some of the work. Appvion was held not liable for this Site under CERCLA.
	All other potentially responsible parties, including the United States and the State of Wisconsin, have either settled with the Governments or entered into a consent decree that awaits approval from the district court. As a result, the remaining defendants consist of us, NCR, and Georgia-Pacific.
	We appealed the injunction to the United States Court of Appeals for the Seventh Circuit, as did NCR, WTM I, and Menasha. On September 25, 2014, the court of appeals decided our and NCR’s appeals; the others’ appeals were not decided because they have entered into a settlement that awaits approval. The court of appeals vacated the injunction as to us and NCR. However, it affirmed the district court’s ruling that we are liable for response actions in OU2-5 and for complying with the UAO. The court of appeals vacated and remanded the district court’s decision that NCR had failed to prove that liability for OU2-5 could be apportioned, directing the lower court to consider issues it had not considered initially. The United States has since moved for a judgment against NCR based on further findings from the existing evidentiary record, and we await a decision on that motion.
	Except as described above with respect to the claim for NRDs, the pending settlement, and the motion for a judgment on further findings, we do not know the Governments’ intentions concerning further litigation of the Government Action, nor do we know the schedule for any further proceedings. We cannot now predict when it will be resolved.
	Reserves for the Site.    As of December 31, 2014, our reserve for the Site totaled $16.3 million, including our remediation and ongoing monitoring obligations in OU1, our share of remediation of the rest of the Site, NRDs and all pending, threatened or asserted and unasserted claims against us relating to PCB contamination at the Site. Of our total reserve for the Fox River, $1.1 million is recorded in the accompanying consolidated balance sheets under the caption “Environmental liabilities” and the remainder is recorded under the caption “Other long term liabilities.” In the event we are required to fund remediation activities in OU2-5, such developments would affect the classification of the current portion of our reserve.
	As described above, the appellate court vacated and remanded for reconsideration the district court’s ruling in the Whiting Litigation that NCR would bear 100% of costs for the downstream portion of the Site. We continue to believe we will not be allocated a significant share of liability in any final equitable allocation of the response costs for OU2-5 or for NRDs. The accompanying consolidated financial statements do not include reserves for any future defense costs, which could be significant, related to our involvement at the Site.
	In setting our reserve for the Site, we have assessed our legal defenses, including our successful defenses to the allegations made in the Whiting Litigation and the original determination in the Whiting Litigation that NCR owes us “full contribution” for response costs and for NRDs that we may become obligated to pay except in OU1. We assume we will not bear the entire cost of remediation or damages to the exclusion of other known parties at the Site, who are also jointly and severally liable. The existence and ability of other parties to participate has also been taken into account in setting our reserve, and setting our reserve is generally based on our evaluation of recent publicly available financial information on certain of the responsible parties and any known insurance, indemnity or cost sharing agreements between responsible parties and third parties. In addition, we have considered the magnitude, nature, location and circumstances associated with the various discharges of PCBs to the river and the relationship of those discharges to identified contamination. We will continue to evaluate our exposure and the level of our reserves, including, but not limited to, our potential share of the costs and NRDs, if any, associated with the Site.
	Other Information.    The Governments have published studies estimating the amount of PCBs discharged by each identified potentially responsible party to the lower Fox River and Green Bay. These reports estimate our Neenah mill’s share of the mass of PCBs discharged to be as high as 27%. The district court has found the discharge mass estimates used in these studies not to be accurate. We believe the Neenah mill’s absolute and relative contribution of PCB mass is significantly lower than the estimates set forth in these studies. The trial court in the Government Action has found that the Neenah mill discharged an unknown amount of PCBs.
	Based upon the rulings in the Whiting Litigation and the Government Action, neither of which endorsed an equitable allocation in proportion to the mass of PCBs discharged, we continue to believe an allocation in proportion to mass of PCBs discharged would not constitute an equitable allocation of the potential liability for the contamination at the Fox River. We contend other factors, such as a party’s role in causing costs, the location of discharge, and the location of contamination must be considered in order for the allocation to be equitable.
	Range of Reasonably Possible Outcomes.    Our analysis of the range of reasonably possible outcomes is derived from all available information, including but not limited to decisions of the courts, official documents such as records of decision, discussions with the United States and other parties, as well as legal counsel and engineering consultants. Based on our analysis of the current records of decision and cost estimates for work to be performed at the Site, and substantially dependent on the resolution of the allocation arguments discussed above, we believe it is reasonably possible that our costs associated with the Fox River matter could exceed the aggregate amounts accrued for the Fox River matter by amounts ranging from insignificant to $185 million.
	We expect remediation costs to be incurred primarily over the next two to three years, although we are unable to determine with any degree of certainty whether we will be required to share in the funding of the downstream remediation. We believe the likelihood of an outcome in the upper end of the monetary range is significantly less than other possible outcomes within the range and the possibility of an outcome in excess of the upper end of the monetary range is remote.
	However, we cannot predict the outcome of any actions related to interim funding. To the extent we are required to provide any such interim funding, we contend that NCR or another party would be required to reimburse us once the final allocation is determined.
	Summary.    Our current assessment is we will be able to manage this environmental matter without a long-term, material adverse impact on the Company. This matter could, however, at any particular time or for any particular year or yeas, have a material adverse effect on our consolidated financial position, liquidity and/or results of operations or could result in a default under our debt covenants. Moreover, there can be no assurance our reserves will be adequate to provide for future obligations related to this matter, or our share of costs and/or damages will not exceed our available resources, or those obligations will not have a long-term, material adverse effect on our consolidated financial position, liquidity or results of operations. Should a court grant the United States or the State of Wisconsin relief requiring us individually either to perform directly or to contribute significant amounts towards remedial action downstream
	of Little Lake Butte des Morts those developments could have a material adverse effect on our consolidated financial position, liquidity and results of operations and might result in a default under our loan covenants.

Segment_and_Geographic_Informa

Segment and Geographic Information	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment and Geographic Information	24	SEGMENT AND GEOGRAPHIC INFORMATION
	The following tables set forth profitability and other information by business unit:
	For the year ended December 31, 2014			Composite		Advanced		Specialty		Other and			Total
	In millions			Fibers		Airlaid		Papers		Unallocated
						Materials
	Net sales		$	617.9	$	281.7	$	902.9	$	–		$	1,802.40
	Energy and related sales, net			–		–		7.9		–			7.9
	Total revenue			617.9		281.7		910.8		–			1,810.30
	Cost of products sold			498		247.6		821.8		7.8			1,575.20
	Gross profit			119.9		34.1		89		(7.8	)		235.2
	SG&A			51.6		8.8		50.4		22.4			133.2
	Gains on dispositions of plant, equipment and timberlands, net			–		–		–		(4.9	)		(4.9	)
	Total operating income (loss)			68.3		25.3		38.6		(25.3	)		106.8
	Non-operating expense			–		–		–		(19.4	)		(19.4	)
	Income (loss) before income taxes		$	68.3	$	25.3	$	38.6	$	(44.7	)	$	87.4
	Supplementary Data
	Plant, equipment and timberlands, net		$	277.8	$	163.6	$	250.1	$	6.1		$	697.6
	Depreciation, depletion and amortization			29.7		9.1		29.9		1.9			70.6
	Capital expenditures			23.9		7.6		32.1		2.4			66
	For the year ended December 31, 2013			Composite		Advanced		Specialty		Other and			Total
	In millions			Fibers		Airlaid		Papers		Unallocated
						Materials
	Net sales		$	566.4	$	268.4	$	887.9	$	–		$	1,722.60
	Energy and related sales, net			–		–		3.2		–			3.2
	Total revenue			566.4		268.4		891		–			1,725.80
	Cost of products sold			456.5		238		799.3		13.3			1,507.10
	Gross profit			109.8		30.4		91.7		(13.3	)		218.7
	SG&A			47.4		8.9		52		25.5			133.9
	Gains on dispositions of plant, equipment and timberlands, net			–		–		–		(1.7	)		(1.7	)
	Total operating income (loss)			62.4		21.5		39.7		(37.1	)		86.5
	Non-operating expense			–		–		–		(17.3	)		(17.3	)
	Income (loss) before income taxes		$	62.4	$	21.5	$	39.7	$	(54.4	)	$	69.2
	Supplementary Data
	Plant, equipment and timberlands, net		$	300	$	175.1	$	242.6	$	5.6		$	723.3
	Depreciation, depletion and amortization			24.8		8.9		33.2		1.3			68.2
	Capital expenditures			56.9		6.7		34.3		5.1			103
	For the year ended December 31, 2012			Composite		Advanced		Specialty		Other and			Total
	In millions			Fibers		Airlaid		Papers		Unallocated
						Materials
	Net sales		$	436.7	$	246.3	$	894.8	$	–		$	1,577.80
	Energy and related sales, net			–		–		7		–			7
	Total revenue			436.7		246.3		901.8		–			1,584.80
	Cost of products sold			362.6		218.7		779.5		10.3			1,371.10
	Gross profit			74.2		27.6		122.3		(10.4	)		213.6
	SG&A			38.1		9.6		55		18.9			121.6
	Gains on dispositions of plant, equipment and timberlands, net			–		–		–		(9.8	)		(9.8	)
	Total operating income (loss)			36.1		18		67.3		(19.5	)		101.9
	Non-operating expense			–		–		–		(22.9	)		(22.9	)
	Income (loss) before income taxes		$	36.1	$	18	$	67.3	$	(42.4	)	$	78.9
	Supplementary Data
	Plant, equipment and timberlands, net		$	200.1	$	172.9	$	247.9	$	0.3		$	621.2
	Depreciation, depletion and amortization			23.5		8.7		37.4		–			69.5
	Capital expenditures			31.4		3.9		23.1		0.3			58.8
	The sum of individual amounts set forth above may not agree to the consolidated financial statements included herein due to rounding.
	Results of individual business units are presented based on our management accounting practices and management structure. There is no comprehensive, authoritative body of guidance for management accounting equivalent to accounting principles generally accepted in the United States of America; therefore, the financial results of individual business units are not necessarily comparable with similar information for any other company. The management accounting process uses assumptions and allocations to measure performance of the business units. Methodologies are refined from time to time as management accounting practices are enhanced and businesses change. The costs incurred by support areas not directly aligned with the business unit are allocated primarily based on an estimated utilization of support area services.
	Management evaluates results of operations of the business units before pension income or expense, alternative fuel mixture credits, debt redemption costs, restructuring related charges, certain corporate level costs, and the effects of certain asset dispositions. Management believes that this is a more meaningful representation of the operating performance of its core businesses, the profitability of business units and the extent of cash flow generated from these core operations. Such amounts are presented under the caption “Other and Unallocated.” This presentation is aligned with the management and operating structure of our company. It is also on this basis that the Company’s performance is evaluated internally and by the Company’s Board of Directors.
	Our Composite Fibers business unit serves customers globally and focuses on higher value-added products in the following markets:
		•		Food & Beverage paper primarily used for single-serve coffee and tea products;
		•		Non-woven wall covering base materials used by the world’s largest wallpaper manufacturers;
		•		Metallized products used in the labeling of beer bottles, packaging innerliners, gift wrap, self-adhesive labels and other consumer product applications;
		•		Composite Laminates papers used in production of decorative laminates; and
		•		Technical Specialties a diverse line of special paper products used in batteries and capacitors, adhesive tapes and other highly-engineered applications.
	Composite Fibers’ revenue composition by market consisted of the following for the years indicated:
	In thousands			2014		2013		2012
Food & beverage		$	296,304	$	302,738	$	265,423
Wall covering			149,957		97,698		–
Metallized			80,839		83,949		87,720
Composite laminates			38,159		39,296		44,613
Technical specialties and other			52,592		42,679		38,984
Total		$	617,851	$	566,360	$	436,740
The Advanced Airlaid Materials business unit is a leading global supplier of highly absorbent cellulose-based airlaid non-woven materials used to manufacture a diverse range of consumer and industrial products for growing global end-user markets. These products include:
	•		feminine hygiene;
	•		adult incontinence;
	•		specialty wipes; home care;
	•		table top; and
	•		food pads.
Advanced Airlaid Materials’ revenue composition by market consisted of the following for the years indicated:
In thousands			2014		2013		2012
Feminine hygiene		$	216,836	$	219,222	$	197,792
Adult incontinence			17,586		5,046		6,959
Wipes			16,002		15,186		13,562
Home care			15,401		14,857		14,527
Other			15,848		14,085		13,442
Total		$	281,673	$	268,396	$	246,282
Our Specialty Papers business unit focuses on producing papers for the following markets:
	•		Carbonless & noncarbonless forms papers for credit card receipts, multi-part forms, security papers and other end-user applications;
	•		Engineered products for digital imaging, packaging, casting, release, transfer, playing card, postal, FDA-compliant food and beverage applications, and other niche specialty applications;
	•		Envelope and converting papers primarily utilized for transactional and direct mail envelopes; and
	•		Book publishing papers for the production of high quality hardbound books and other book publishing needs.
Specialty Papers’ revenue composition by market consisted of the following for the years indicated:
In thousands			2014		2013		2012
Carbonless & forms		$	376,959	$	369,618	$	372,950
Engineered products			194,189		184,913		187,724
Envelope & converting			183,194		175,928		174,781
Book publishing			144,744		153,054		155,925
Other			3,805		4,346		3,397
Total		$	902,891	$	887,859	$	894,777
No individual customer accounted for more than 10% of our consolidated net sales in 2014, 2013 or 2012. However, one customer accounted for the majority of Advanced Airlaid Materials’ net sales in 2014, 2013 and 2012.
Our net sales to external customers and location of net plant, equipment and timberlands are summarized below. Net sales are attributed to countries based upon origin of shipment.
		2014				2013					2012
In thousands			Net sales		Plant,		Net sales		Plant,			Net sales			Plant,
					Equipment and				Equipment and						Equipment and
					Timberlands–Net				Timberlands–Net						Timberlands–Net
United States		$	980,933	$	256,251	$	968,833	$	248,306		$	952,195		$	248,185
Germany			529,003		257,311		483,859		287,880			358,442			191,559
United Kingdom			103,219		62,617		107,082		63,650			119,092			59,131
Canada			129,401		82,774		113,414		83,033			106,702			83,796
Other			59,859		38,655		49,427		40,471			41,357			38,515
Total		$	1,802,415	$	697,608	$	1,722,615	$	723,340		$	1,577,788		$	621,186

Condensed_Consolidating_Financ

Condensed Consolidating Financial Statements	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Financial Statements	25	CONDENSED CONSOLIDATING FINANCIAL STATEMENTS
	Our 5.375% Notes are fully and unconditionally guaranteed, on a joint and several basis, by certain of our 100%-owned domestic subsidiaries, PHG Tea Leaves, Inc., Mollanvick, Inc., and Glatfelter Holdings, LLC. The guarantees are subject to certain customary release provisions including i) the designation of such subsidiary as an unrestricted or excluded subsidiary; (ii) in connection with any sale or disposition of the capital stock of the subsidiary guarantor; and (iii) upon our exercise of our legal defeasance option or our covenant defeasance option, all of which are more fully described in the Indenture dated as of October 3, 2012 among us, the Guarantors and US Bank National Association, as Trustee, relating to the 5.375% Notes. The following presents our condensed consolidating statements of income, including comprehensive income (“statements of income”), and cash flows for the years ended December 31, 2014, 2013 and 2012 and our condensed consolidating balance sheets (“balance sheets”) as of December 31, 2014 and 2013. Our presentation of the Guarantors’ statements of income for the years ended December 31, 2013 and 2012 and balance sheet as of December 31, 2013, has been restated to correctly apply the equity method of accounting to reflect the Guarantors’ equity interests in certain Non Guarantors. Such changes are reflected under the captions “Equity in earnings of subsidiaries” and “Investments in subsidiaries” in the accompanying condensed consolidating statements of income and condensed consolidating balance sheets, respectively. The correction had no impact on any financial information of the Parent Company or the Non Guarantors nor on the statement of cash flows.
	Condensed Consolidating Statement of Income for the
	year ended December 31, 2014
	In thousands		Parent			Guarantors			Non			Adjustments/			Consolidated
			Company						Guarantors			Eliminations
	Net sales		$	902,892		$	35		$	899,523		$	(35	)	$	1,802,415
	Energy and related sales, net			7,927			–			–			–			7,927
	Total revenues			910,819			35			899,523			(35	)		1,810,342
	Costs of products sold			829,336			34			745,853			(35	)		1,575,188
	Gross profit			81,483			1			153,670			–			235,154
	Selling, general and administrative expenses			67,086			492			65,657			–			133,235
	Gains on dispositions of plant, equipment and timberlands, net			(3,545	)		(1,316	)		–			–			(4,861	)
	Operating income			17,942			825			88,013			–			106,780
	Other non-operating income (expense)
	Interest expense			(19,105	)		–			(102,571	)		102,755			(18,921	)
	Interest income			638			102,241			36			(102,756	)		159
	Equity in earnings of subsidiaries			66,628			(35,226	)		–			(31,402	)		–
	Other, net			(1,366	)		314			417			–			(635	)
	Total other non-operating income (expense)			46,795			67,329			(102,118	)		(31,403	)		(19,397	)
	Income (loss) before income taxes			64,737			68,154			(14,105	)		(31,403	)		87,383
	Income tax (benefit) provision			(4,509	)		3,060			19,586			–			18,137
	Net income (loss)			69,246			65,094			(33,691	)		(31,403	)		69,246
	Other comprehensive (loss) income			(79,513	)		(40,704	)		28,840			11,864			(79,513	)
	Comprehensive (loss) income		$	(10,267	)	$	24,390		$	(4,851	)	$	(19,539	)	$	(10,267	)
	Condensed Consolidating Statement of Income for the
	year ended December 31, 2013
	In thousands		Parent			Guarantors			Non			Adjustments/			Consolidated
			Company						Guarantors			Eliminations
	Net sales		$	887,859		$	16		$	834,756		$	(16	)	$	1,722,615
	Energy and related sales, net			3,153			–			–			–			3,153
	Total revenues			891,012			16			834,756			(16	)		1,725,768
	Costs of products sold			812,298			15			694,819			(24	)		1,507,108
	Gross profit			78,714			1			139,937			8			218,660
	Selling, general and administrative expenses			69,614			718			63,535			–			133,867
	Gains on dispositions of plant, equipment and timberlands, net			(1,390	)		(319	)		(17	)		–			(1,726	)
	Operating income (loss)			10,490			(398	)		76,419			8			86,519
	Other non-operating income (expense)
	Interest expense			(18,891	)		–			(8,064	)		8,990			(17,965	)
	Interest income			627			8,662			12			(8,991	)		310
	Equity in earnings of subsidiaries			58,412			48,538			–			(106,950	)		–
	Other, net			(1,569	)		104			1,802			–			337
	Total other non-operating income (expense)			38,579			57,304			(6,250	)		(106,951	)		(17,318	)
	Income before income taxes			49,069			56,906			70,169			(106,943	)		69,201
	Income tax (benefit) provision			(18,089	)		453			19,675			4			2,043
	Net income			67,158			56,453			50,494			(106,947	)		67,158
	Other comprehensive income			88,609			6,883			4,223			(11,106	)		88,609
	Comprehensive income		$	155,767		$	63,336		$	54,717		$	(118,053	)	$	155,767
	Condensed Consolidating Statement of Income for the
	year ended December 31, 2012
	In thousands		Parent			Guarantors			Non			Adjustments/			Consolidated
			Company						Guarantors			Eliminations
	Net sales		$	894,777		$	14		$	683,022		$	(25	)	$	1,577,788
	Energy and related sales, net			7,000			–			–			–			7,000
	Total revenues			901,777			14			683,022			(25	)		1,584,788
	Costs of products sold			789,589			13			581,544			(7	)		1,371,139
	Gross profit			112,188			1			101,478			(18	)		213,649
	Selling, general and administrative expenses			73,877			169			47,544			–			121,590
	Gains on dispositions of plant, equipment and timberlands, net			(9,790	)		–			(25	)		–			(9,815	)
	Operating income (loss)			48,101			(168	)		53,959			(18	)		101,874
	Other non-operating income (expense)
	Interest expense			(22,311	)		(57	)		(3,891	)		7,565			(18,694	)
	Interest income			452			7,191			382			(7,565	)		460
	Equity in earnings of subsidiaries			40,682			33,954			–			(74,636	)		–
Other, net			(6,459	)		477			1,283			–			(4,699	)
Total other non-operating income (expense)			12,364			41,565			(2,226	)		(74,636	)		(22,933	)
Income before income taxes			60,465			41,397			51,733			(74,654	)		78,941
Income tax provision			1,086			1,587			16,889			–			19,562
Net income			59,379			39,810			34,844			(74,654	)		59,379
Other comprehensive income			2,775			3,243			3,920			(7,163	)		2,775
Comprehensive income		$	62,154		$	43,053		$	38,764		$	(81,817	)	$	62,154
Condensed Consolidating Balance Sheet as of December 31, 2014
In thousands		Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
Assets
Cash and cash equivalents		$	42,208		$	514		$	57,115		$	—		$	99,837
Other current assets			218,544			420,451			263,567			(427,777	)		474,785
Plant, equipment and timberlands, net			255,255			991			441,362			—			697,608
Investments in subsidiaries			824,480			399,931			—			(1,224,411	)		—
Other assets			121,125			—			186,129			(17,980	)		289,274
Total assets		$	1,461,612		$	821,887		$	948,173		$	(1,670,168	)	$	1,561,504
Liabilities and Shareholders’ Equity
Current liabilities		$	403,662		$	3,394		$	307,737		$	(435,062	)	$	279,731
Long-term debt			250,000			—			721,457			(572,579	)		398,878
Deferred income taxes			46,483			(453	)		70,275			(12,289	)		104,016
Other long-term liabilities			112,358			—			11,633			5,779			129,770
Total liabilities			812,503			2,941			1,111,102			(1,014,151	)		912,395
Shareholders’ equity			649,109			818,946			(162,929	)		(656,017	)		649,109
Total liabilities and shareholders’ equity		$	1,461,612		$	821,887		$	948,173		$	(1,670,168	)	$	1,561,504
Condensed Consolidating Balance Sheet as of December 31, 2013
In thousands		Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
Assets
Cash and cash equivalents		$	56,216		$	501		$	66,165		$	—		$	122,882
Other current assets			208,814			327,152			253,779			(326,045	)		463,700
Plant, equipment and timberlands, net			247,243			1,054			475,043			—			723,340
Investments in subsidiaries			803,688			468,533			—			(1,272,221	)		—
Other assets			170,060			—			214,301			(15,873	)		368,488
Total assets		$	1,486,021		$	797,240		$	1,009,288		$	(1,614,139	)	$	1,678,410
Liabilities and Shareholders’ Equity
Current liabilities		$	375,535		$	2,855		$	247,855		$	(337,878	)	$	288,367
Long-term debt			250,000			—			513,120			(320,795	)		442,325
Deferred income taxes			70,989			(283	)		78,633			(8,319	)		141,020
Other long-term liabilities			105,021			—			13,792			3,409			122,222
Total liabilities			801,545			2,572			853,400			(663,583	)		993,934
Shareholders’ equity			684,476			794,668			155,888			(950,556	)		684,476
Total liabilities and shareholders’ equity		$	1,486,021		$	797,240		$	1,009,288		$	(1,614,139	)	$	1,678,410
The amounts of the Guarantors’ Investments in subsidiaries set forth above include investments in equity of the Non Guarantors as well as amounts due from the Non Guarantors arising from the conversion of certain equity interests into debt instruments. Such debt instruments are reported in the Non Guarantors column under the caption “Long-term debt.”
Condensed Consolidating Statement of Cash Flows for the year
ended December 31, 2014
In thousands		Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
Net cash provided (used) by
Operating activities		$	36,240		$	4,158		$	59,179		$	–		$	99,577
Investing activities
Expenditures for purchases of plant, equipment and timberlands			(34,518	)		–			(31,528	)		–			(66,046	)
Proceeds from disposal plant, equipment and timberlands, net			3,707			1,355			10			–			5,072
Repayments from intercompany loans			–			20,840			–			(20,840	)		–
Advances of intercompany loans			(12,671	)		(26,340	)		–			39,011			–
Acquisitions, net of cash acquired			–			–			(8,015	)		–			(8,015	)
Other			(600	)		–			–			–			(600	)
Total investing activities			(44,082	)		(4,145	)		(39,533	)		18,171			(69,589	)
Financing activities
Net repayments of indebtedness			–			–			(18,128	)		–			(18,128	)
Payment of dividends to shareholders			(18,696	)		–			–			–			(18,696	)
Repurchases of common stock			(12,180	)		–			–			–			(12,180	)
Repayments of intercompany loans			–			–			(20,840	)		20,840			–
Borrowings of intercompany loans			26,340			–			12,671			(39,011	)		–
Payments related to share-based compensation awards and other			(1,630	)		–			(247	)		–			(1,877	)
Total financing activities			(6,166	)		–			(26,544	)		(18,171	)		(50,881	)
Effect of exchange rate on cash			–			–			(2,152	)		–			(2,152	)
Net (decrease) increase in cash			(14,008	)		13			(9,050	)		–			(23,045	)
Cash at the beginning of period			56,216			501			66,165			–			122,882
Cash at the end of period		$	42,208		$	514		$	57,115		$	–		$	99,837
Condensed Consolidating Statement of Cash Flows for the year
ended December 31, 2013
In thousands		Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
Net cash provided (used) by
Operating activities		$	55,507		$	4,974		$	113,154		$	–		$	173,635
Investing activities
Expenditures for plant, equipment and timberlands			(39,496	)		–			(63,551	)		–			(103,047	)
Proceeds from disposals of plant, equipment and timberlands, net			1,435			333			179			–			1,947
Repayments from intercompany loans			–			18,223			–			(18,223	)		–
Advances of intercompany loans			–			(27,216	)		–			27,216			–
Intercompany capital contributed			–			(91	)		–			91			–
Acquisitions, net of cash acquired			–			–			(210,911	)		–			(210,911	)
Other			(425	)		–			–			–			(425	)
Total investing activities			(38,486	)		(8,751	)		(274,283	)		9,084			(312,436	)
Financing activities
Net proceeds from indebtedness			–			–			182,230			–			182,230
Payments of note offering costs			(160	)		–			(259	)		–			(419	)
Payment of dividends to shareholders			(16,965	)		–			–			–			(16,965	)
Repayments of intercompany loans			(1,100	)					(17,123	)		18,223			–
Borrowings of intercompany loans			15,310						11,906			(27,216	)		–
Intercompany capital received			–			–			91			(91	)		–
Payments for share-based compensation awards and other			(1,671	)		–			–			–			(1,671	)
Total financing activities			(4,586	)		–			176,845			(9,084	)		163,175
Effect of exchange rate on cash			–			–			829			–			829
Net increase (decrease) in cash			12,435			(3,777	)		16,545			–			25,203
Cash at the beginning of period			43,781			4,278			49,620			–			97,679
Cash at the end of period		$	56,216		$	501		$	66,165		$	–		$	122,882
Condensed Consolidating Statement of Cash Flows for the year
ended December 31, 2012
In thousands		Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
Net cash provided (used) by
Operating activities		$	25,787		$	5,958		$	81,101		$	–		$	112,846
Investing activities
Expenditures for plant, equipment and timberlands			(23,463	)		–			(35,289	)		–			(58,752	)
Proceeds from disposals of plant, equipment and timberlands, net			10,236			–			36			–			10,272
Repayments from intercompany loans			6,088			29,343			–			(35,431	)		–
Advances of intercompany loans			(91	)		(34,375	)		(514	)		34,980			–
Other			(225	)		–			–			–			(225	)
Total investing activities			(7,455	)		(5,032	)		(35,767	)		(451	)		(48,705	)
Financing activities
Net proceeds from indebtedness			17,869			–			–			–			17,869
Payments of note offering costs			(4,748	)		–			–			–			(4,748	)
Payment of dividends to shareholders			(15,608	)		–			–			–			(15,608	)
Repurchases of common stock			(5,675	)		–			–			–			(5,675	)
Repayments of intercompany loans			–			–			(35,431	)		35,431			–
Borrowings of intercompany loans			27,875			514			6,591			(34,980	)		–
Proceeds from stock options exercised and other			2,673			–			–			–			2,673
Total financing activities			22,386			514			(28,840	)		451			(5,489	)
Effect of exchange rate on cash			–			–			750			–			750
Net increase in cash			40,718			1,440			17,244			–			59,402
Cash at the beginning of period			3,063			2,838			32,376			–			38,277
Cash at the end of period		$	43,781		$	4,278		$	49,620		$	–		$	97,679

Quarterly_Results

Quarterly Results	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results	26	QUARTERLY RESULTS (UNAUDITED)
	In thousands,		Net sales					Gross Profit						Net Income				Diluted earnings per
	except per share																	share
			2014			2013		2014			2013			2014		2013		2014		2013
	First		$	455,721		$	405,189	$	55,040		$	57,375		$	14,648	$	15,629	$	0.33	$	0.36
	Second			445,341			425,967		41,437			40,840			4,669		933		0.11		0.02
	Third			465,092			456,648		80,513			66,039			30,372		34,119		0.69		0.77
	Fourth			436,261			434,811		58,164			54,406			19,557		16,477		0.45		0.37
	The information set forth above for net income and earnings per share includes the impact of the following, on an after-tax basis:
			Asset Impairment					Restructuring Costs &						Alternative Fuel				Gains on Sales of Plant				Acquisition
			Charge					Workforce Efficiency						Mixture/ Cellulosic				Equipment and Timberlands				Integration Costs
														Biofuel Credits
	In thousands		2014			2013		2014			2013			2014		2013		2014		2013		2014			2013
	First		$	–		$	–	$	–		$	(260	)	$	–	$	–	$	507	$	282	$	–		$	(1,761	)
	Second			–			–		–			(193	)		–		–		872		–		–			(3,969	)
	Third			(2,356	)		–		–			(117	)		1,032		9,866		1,004		142		(115	)		(154	)
	Fourth			–			–		(373	)		(60	)		81		450		612		1,301		(487	)		(194	)

Valuation_and_Qualifying_Accou

Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts	Schedule II
	P. H. GLATFELTER COMPANY AND SUBSIDIARIES
	SUPPLEMENTAL FINANCIAL STATEMENT SCHEDULE
	For each of the three years ended December 31, 2014
	Valuation and Qualifying Accounts
			Allowance for
	In thousands		Doubtful Accounts									Sales Discounts and Deductions
			2014			2013			2012			2014			2013			2012
	Balance, beginning of year		$	2,725		$	2,858		$	2,861		$	1,810		$	2,302		$	2,831
	Provision			1,061			945			71			4,356			5,526			3,661
	Write-offs, recoveries and discounts allowed			(946	)		(1,119	)		(91	)		(4,719	)		(6,148	)		(4,173	)
	Other (a)			(137	)		41			17			362			130			(17	)
	Balance, end of year		$	2,703		$	2,725		$	2,858		$	1,809		$	1,810		$	2,302
	The provision for doubtful accounts is included in selling, general and administrative expense and the provision for sales discounts and deductions is deducted from sales. The related allowances are deducted from accounts receivable.
	(a)	Relates primarily to changes in currency exchange rates.

Accounting_Policies_Policies

Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation    The consolidated financial statements include the accounts of Glatfelter and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated.
Accounting Estimates	Accounting Estimates    The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingencies as of the balance sheet date and the reported amounts of revenues and expenses during the reporting period. Management believes the estimates and assumptions used in the preparation of these consolidated financial statements are reasonable, based upon currently available facts and known circumstances, but recognizes that actual results may differ from those estimates and assumptions.
Cash and Cash Equivalents	Cash and Cash Equivalents    We classify all highly liquid instruments with an original maturity of three months or less at the time of purchase as cash equivalents.
Inventories	Inventories    Inventories are stated at the lower of cost or market. Raw materials, in-process and finished inventories of our U.S. manufacturing operations are valued using the last-in, first-out (LIFO) method, and the supplies inventories are valued principally using the average-cost method. Inventories at our foreign operations are valued using the average cost method.
Plant, Equipment and Timberlands	Plant, Equipment and Timberlands    For financial reporting purposes, depreciation is computed using the straight-line method over the estimated useful lives of the respective assets.
	The range of estimated service lives used to calculate financial reporting depreciation for principal items of plant and equipment are as follows:
	Buildings		15 – 45 Years
	Machinery and equipment		5 – 40 Years
	Other		3 – 25 Years
Maintenance and Repairs	Maintenance and Repairs    Maintenance and repairs costs are charged to income and major renewals and betterments are capitalized. At the time property is retired or sold, the net carrying value is eliminated and any resultant gain or loss is included in income.
Valuation of Long-lived Assets, Intangible Assets and Goodwill	Valuation of Long-lived Assets, Intangible Assets and Goodwill    We evaluate long-lived assets for impairment when a specific event indicates that the carrying value of an asset may not be recoverable. Recoverability is assessed based on estimates of future cash flows expected to result from the use and eventual disposition of the asset. If the sum of expected undiscounted cash flows is less than the carrying value of the asset, the asset’s fair value is estimated and an impairment loss is recognized for any deficiencies. Goodwill and non-amortizing tradename intangible assets are reviewed, on a discounted cash flow basis, during the third quarter of each year for impairment or more frequently if impairment indicators are present. Impairment losses, if any, are recognized for the amount by which the carrying value of the reporting unit exceeds its fair value. The carrying value of a reporting unit is defined using an enterprise premise which is generally determined by the difference between the unit’s assets and operating liabilities.
Asset Retirement Obligations	Asset Retirement Obligations    In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) No. 410, Asset Retirement and Environmental Obligations, we accrue asset retirement obligations in the period in which obligations relating to future asset retirements are incurred and when a reasonable estimate of fair value can be determined. Under these standards, costs are to be accrued at estimated fair value, and a related long-lived asset is capitalized. Over time, the liability is accreted to its settlement value and the capitalized cost is depreciated over the useful life of the related asset for which the obligation exists. Upon settlement of the liability, we recognize a gain or loss for any difference between the settlement amount and the liability recorded.
Income Taxes	Income Taxes    Income taxes are determined using the asset and liability method of accounting for income taxes in accordance with FASB ASC 740 Income Taxes (“ASC 740”). Under ASC 740, tax expense includes U.S. and international income taxes plus the provision for U.S. taxes on undistributed earnings of international subsidiaries not deemed to be permanently invested. Tax credits and other incentives reduce tax expense in the year the credits are claimed. Certain items of income and expense are not reported in tax returns and financial statements in the same year. The tax effect of such temporary differences is reported in deferred income taxes. Deferred tax assets are recognized if it is more likely than not that the assets will be realized in future years. We establish a valuation allowance for deferred tax assets for which realization is not more likely than not.
	Income tax contingencies are accounted for in accordance with FASB ASC 740-10-20 Income Taxes. Significant judgment is required in determining our worldwide provision for income taxes and recording the related assets and liabilities. In the ordinary course of our business, there are many transactions and calculations where the ultimate tax determination is less than certain. We and our subsidiaries are examined by various Federal, State, and foreign tax authorities. We regularly assess the potential outcomes of these examinations and any future examinations for the current or prior years in determining the adequacy of our provision for income taxes. We continually assess the likelihood and amount of potential adjustments and record any necessary adjustments in the period in which the facts that give rise to a revision become known.
Treasury Stock	Treasury Stock    Common stock purchased for treasury is recorded at cost. At the date of subsequent reissue, the treasury stock account is reduced by the cost of such stock on the weighted-average cost basis.
Foreign Currency Translation	Foreign Currency Translation    Foreign currency translation gains and losses and the effect of exchange rate changes on transactions designated as hedges of net foreign investments are included as a component of other comprehensive income (loss). Transaction gains and losses are included in income in the period in which they occur.
Revenue Recognition	Revenue Recognition    We recognize revenue on product sales when the customer takes title and assumes the risks and rewards of ownership. Estimated costs for sales incentives, discounts and sales returns and allowances are recorded as sales deductions in the period in which the related revenue is recognized.
	Revenue from energy sales is recognized when electricity is delivered to the customer. Certain costs associated with the production of electricity, such as fuel, labor, depreciation and maintenance are netted against energy sales for presentation on the consolidated statements of income.
	Revenue from renewable energy credits is recorded under the caption “Energy and related sales, net” in the Consolidated Statements of Income and is recognized when all risks, rights and rewards to the certificate are transferred to the counterparty.
Environmental Liabilities	Environmental Liabilities    Accruals for losses associated with environmental obligations are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated based on existing legislation and remediation technologies. Costs related to environmental remediation are charged to expense. These accruals are adjusted periodically as assessment and remediation actions continue and/or further legal or technical information develops. Such undiscounted liabilities are exclusive of any insurance or other claims against third parties. Environmental costs are capitalized if the costs extend the life of the asset, increase its capacity and/or mitigate or prevent contamination from future operations. Recoveries of environmental remediation costs from other parties, including insurance carriers, are recorded as assets when their receipt is assured beyond a reasonable doubt.
Earnings Per Share	Earnings Per Share    Basic earnings per share is computed by dividing net income by the weighted-average common shares outstanding during the respective periods. Diluted earnings per share is computed by dividing net income by the weighted-average common shares and common share equivalents outstanding during the period. The dilutive effect of common share equivalents is considered in the diluted earnings per share computation using the treasury stock method.
Financial Derivatives and Hedging Activities	Financial Derivatives and Hedging Activities    We use financial derivatives to manage exposure to changes in foreign currencies. In accordance with FASB ASC 815 Derivatives and Hedging (“ASC 815”), we record all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting, and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting.
	Cash Flow Hedges    The effective portion of the gain or loss on those derivative instruments designated and qualifying as a hedge of the exposure to variability in expected future cash flows related to forecasted transactions is deferred and reported as a component of accumulated other comprehensive income (loss). Deferred gains or losses are reclassified to our results of operations at the time the hedged forecasted transaction is recorded in our results of operations. The effectiveness of cash flow hedges is assessed at inception and quarterly thereafter. If the instrument becomes ineffective or it becomes probable that the originally-forecasted transaction will not occur, the related change in fair value of the derivative instrument is also reclassified from accumulated other comprehensive income (loss) and recognized in earnings.
Fair Value of Financial Instruments	Fair Value of Financial Instruments    Under the accounting for fair value measurements and disclosures, a fair value hierarchy was established that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The three levels of the fair value hierarchy are described below:
	Level 1 –	Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.
	Level 2 –	Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, including quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates); and inputs that are derived principally from or corroborated by observable market data by correlation or other means.
	Level 3 –	Inputs that are both significant to the fair value measurement and unobservable.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update No. 2014-09 – Revenue from Contracts with Customers which clarifies the principles for recognizing revenue and develops a common revenue standard for GAAP and International Financial Reporting Standards. The new standard is required to be adopted for fiscal years beginning after December 15, 2016 and early adoption is not permitted. We are in the process of evaluating the impact this standard may have, if any, on our reported results of operations or financial position.

Accounting_Policies_Tables

Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Schedule of Range of Estimated Service Lives	The range of estimated service lives used to calculate financial reporting depreciation for principal items of plant and equipment are as follows:
	Buildings	15 – 45 Years
	Machinery and equipment	5 – 40 Years
	Other	3 – 25 Years

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Summary of Allocation of Purchase Price to Assets Acquired and Liabilities Assumed	The allocation of the purchase price to assets acquired and liabilities assumed was as follows:
	In thousands	Final Allocation
	Assets
	Cash and cash equivalents	$	12,227
	Accounts receivable		23,870
	Inventory		13,864
	Prepaid and other current assets		8,060
	Plant, equipment and timberlands		60,951
	Intangible assets		87,596
	Goodwill		74,870
	Total assets		281,438
	Liabilities
	Accounts payable		20,253
	Deferred tax liabilities		36,120
	Other long term liabilities		1,927
	Total liabilities		58,300
	Total		223,138
	less cash acquired		(12,227	)
	Total purchase price	$	210,911
Summary of Pro Forma Financial Information	The table below summarizes pro forma financial information as if the acquisition and related financing transaction occurred as of January 1, 2012:
		Year ended December 31
	In thousands, except per share		2013			2012
	Pro forma
	Net sales	$	1,779,434		$	1,727,538
	Net income		80,381			79,075
	Diluted earnings per share		1.82			1.81

Energy_and_Related_Sales_Net_T

Energy and Related Sales, Net (Tables)	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Summary of Energy and Related Sales Net	The following table summarizes this activity for each of the past three years:
		Year ended December 31
	In thousands		2014			2013			2012
	Energy sales	$	11,886		$	8,189		$	5,284
	Costs to produce		(6,204	)		(6,784	)		(4,187	)
	Net		5,682			1,405			1,097
	Renewable energy credits		2,245			1,748			5,903
	Total	$	7,927		$	3,153		$	7,000

Gain_on_Dispositions_of_Plant_1

Gain on Dispositions of Plant, Equipment and Timberlands (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Summary for Sale of Timberlands and Other Assets	During 2014, 2013 and 2012, we completed the following sales of assets:
	Dollars in thousands	Acres		Proceeds		Gain
	2014
	Timberlands	2,753	$	5,062	$	4,855
	Other	n/a		10		6
	Total		$	5,072	$	4,861
	2013
	Timberlands	876	$	1,445	$	1,410
	Other	n/a		502		316
	Total		$	1,947	$	1,726
	2012
	Timberlands	4,830	$	9,494	$	9,203
	Other	n/a		778		612
	Total		$	10,272	$	9,815

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Details of Basic and Diluted Earnings Per Share (EPS)	The following table sets forth the details of basic and diluted earnings per share (EPS):
		Year ended December 31
	In thousands, except per share		2014		2013		2012
	Net income	$	69,246	$	67,158	$	59,379
	Weighted average common shares outstanding used in basic EPS		43,201		43,158		42,851
	Common shares issuable upon exercise of dilutive stock options and PSAs / RSUs		865		1,141		821
	Weighted average common shares outstanding and common share equivalents used in diluted EPS		44,066		44,299		43,672
	Earnings per share
	Basic	$	1.6	$	1.56	$	1.39
	Diluted		1.57		1.52		1.36
Number of Potential Common Shares that have been Excluded from Computation of Diluted Earnings Per Share for Indicated Period Due to Their Anti-Dilutive Nature	The following table sets forth the potential common shares outstanding for stock options and restricted stock units that were not included in the computation of diluted EPS for the period indicated, because their effect would be anti-dilutive:
		Year ended December 31
	In thousands		2014		2013		2012
	Potential common shares		277		7		8

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Income (Losses)	The following table sets forth details of the changes in accumulated other comprehensive income (losses) for the three years ended December 31, 2014, 2013 and 2012.
	in thousands		Currency			Unrealized			Change in			Change in			Total
			translation			gain (loss)			pensions			other
			adjustments			on cash						postretirement
						flow hedges						defined
												benefit plans
	Balance at January 1, 2014	$	15,141		$	(941	)	$	(89,547	)	$	(10	)	$	(75,357	)
	Other comprehensive income before reclassifications (net of tax)		(49,365	)		2,826			(40,266	)		(2,803	)		(89,608	)
	Amounts reclassified from accumulated other comprehensive income		–			471			9,553			71			10,095
	(net of tax)
	Net current period other comprehensive income (loss)		(49,365	)		3,297			(30,713	)		(2,732	)		(79,513	)
	Balance at December 31, 2014	$	(34,224	)	$	2,356		$	(120,260	)	$	(2,742	)	$	(154,870	)
	Balance at January 1, 2013	$	315		$	(424	)	$	(159,560	)	$	(4,297	)	$	(163,966	)
	Other comprehensive income before reclassifications (net of tax)		14,826			(1,198	)		54,906			4,187			72,721
	Amounts reclassified from accumulated other comprehensive income (net of tax)		–			681			15,107			100			15,888
	Net current period other comprehensive income (loss)		14,826			(517	)		70,013			4,287			88,609
	Balance at December 31, 2013	$	15,141		$	(941	)	$	(89,547	)	$	(10	)	$	(75,357	)
	Balance at January 1, 2012	$	(11,043	)	$	1,185		$	(153,002	)	$	(3,881	)	$	(166,741	)
	Other comprehensive income before reclassifications (net of tax)		11,358			(39	)		(18,657	)		(244	)		(7,582	)
	Amounts reclassified from accumulated other comprehensive income		–			(1,570	)		12,099			(172	)		10,357
	(net of tax)
	Net current period other comprehensive income (loss)		11,358			(1,609	)		(6,558	)		(416	)		2,775
	Balance at December 31, 2012	$	315		$	(424	)	$	(159,560	)	$	(4,297	)	$	(163,966	)
Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Losses)	The following table sets forth the amounts reclassified from accumulated other comprehensive income (losses) for the years indicated.
		Year ended December 31
	In thousands		2014			2013			2012
	Description										Line Item in Statements of Income
	Cash flow hedges (Note 20)
	(Gains) losses on cash flow hedges	$	655		$	945		$	(2,183	)	Costs of products sold
	Tax (benefit) expense		(184	)		(264	)		613		Income tax provision
	Net of tax		471			681			(1,570	)
	Retirement plan obligations (Note 11)
	Amortization of deferred benefit pension		2,503			2,470			2,025		Costs of products sold
	plan items
	Prior service costs		830			649			430		Selling, general and administrative
	Actuarial losses		8,965			16,399			13,764		Costs of products sold
			3,086			4,699			3,256		Selling, general and administrative
			15,384			24,217			19,475
			(5,831	)		(9,110	)		(7,376	)	Income tax provision
	Net of tax		9,553			15,107			12,099
	Amortization of deferred benefit other		(237	)		(384	)		(760	)	Costs of products sold
	plan items
	Prior service costs		(51	)		(96	)		(177	)	Selling, general and administrative
	Actuarial losses		331			494			511		Costs of products sold
			71			147			149		Selling, general and administrative
			114			161			(277	)
			(43	)		(61	)		105		Income tax provision
	Net of tax		71			100			(172	)
	Total reclassifications, net of tax	$	10,095		$	15,888		$	10,357

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Schedule of Provision for Income Taxes from Operations	The provision for income taxes from operations consisted of the following:
			Year ended December 31
	In thousands		2014				2013			2012
	Current taxes
	Federal		$	3,291			$	625		$	8,869
	State			238				(4,365	)		3,386
	Foreign			24,027				17,268			9,516
				27,556				13,528			21,771
	Deferred taxes and other
	Federal			(3,975	)			(10,973	)		(5,456	)
	State			(147	)			(474	)		(920	)
	Foreign			(5,297	)			(38	)		4,167
				(9,419	)			(11,485	)		(2,209	)
	Income tax provision		$	18,137			$	2,043		$	19,562
Schedule of Domestic and Foreign Components of Pretax Income from Operations	The following are the domestic and foreign components of pretax income from operations:
			Year ended December 31
	In thousands		2014				2013			2012
	United States		$	4,637			$	(3,052	)	$	24,525
	Foreign			82,746				72,253			54,416
	Total pretax income		$	87,383			$	69,201		$	78,941
Schedule of Reconciliation of Federal Statutory Rate to Company's Effective Tax Rate	A reconciliation between the income tax provision, computed by applying the statutory federal income tax rate of 35% to income before income taxes, and the actual income tax provision is as follows:
			Year ended December 31
			2014				2013			2012
	Federal income tax provision at statutory rate			35	%			35	%		35	%
	State income taxes, net of federal income tax benefit			0.2				0.5			1.3
	Foreign income tax rate differential			(5.0	)			(5.0	)		(3.9	)
	Change in statutory tax rates			(2.2	)			(0.6	)		(0.8	)
	Tax credits			(2.0	)			(4.4	)		(0.5	)
	Change in unrecognized tax benefits, net			1.3				(22.7	)		0.4
	Permanent differences on non-U.S. earnings			(2.8	)			(0.4	)		–
	Cellulosic biofuel credit, net of incremental state tax and manufacturing deduction benefit			–				–			(6.1	)
	Valuation allowance			(2.7	)			–			–
	Other			(1.0	)			0.6			(0.6	)
	Provision for income taxes			20.8	%			3	%		24.8	%
Schedule of Current and Non-Current Deferred Tax Assets and Liabilities	Current and non-current deferred tax assets and liabilities are included in the following balance sheet captions:
			December 31
	In thousands			2014				2013
	Prepaid expenses and		$	20,017			$	21,447
	other current assets
	Other assets			8,830				9,197
	Other current liabilities			234				12
	Deferred income taxes			104,016				141,020
Schedule of Unrecognized Tax Benefit	A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows:
	In millions			2014				2013			2012
	Balance at January 1		$	14.9			$	30.4		$	29.7
	Increases in tax positions for prior years			0.7				0.2			1.4
	Decreases in tax positions for prior years			(0.5	)			(4.9	)		(1.0	)
	Acquisition related:
	Purchase Accounting			0.3				1.3			–
	Increases in tax positions for current year			3.4				1.7			1.9
	Settlements			(1.3	)			–			(0.4	)
	Lapse in statutes of limitation			(2.6	)			(13.8	)		(1.2	)
	Balance at December 31		$	14.9			$	14.9		$	30.4
Summary of Tax Years that Remain Subject to Examination by Major Jurisdiction	The following table summarizes tax years that remain subject to examination by major jurisdiction:
			Open Tax Years
	Jurisdiction		Examinations not yet		Examination in
			initiated		progress
	United States
	Federal		2013 – 2014			2011 – 2012
	State		2010 – 2014			2011 – 2012
	Canada(1)		2010 – 2014			2009
	Germany(1)		2012 – 2014			2007 – 2011
	France		2013 – 2014			2011 – 2012
	United Kingdom		2013 – 2014			N/A
	Philippines		2012 – 2014			2011
	-1	includes provincial or similar local jurisdictions, as applicable.
Summary of Information Related to Interest and Penalties on Uncertain Tax Positions	The following table summarizes information related to interest and penalties on uncertain tax positions:
			As of or for the year ended
			December 31,
	In millions			2014				2013			2012
	Accrued interest payable		$	0.6			$	0.6		$	1.4
	Interest expense (income)			–				(0.8	)		(0.3	)
	Penalties			–				–			–
Deferred Income Tax [Member]
Schedule of Current and Non-Current Deferred Tax Assets and Liabilities	The sources of deferred income taxes were as follows at December 31:
			2014							2013
	In thousands			Current				Non			Current			Non
				Asset				current			Asset			current
				(Liability)				Asset			(Liability)			Asset
								(Liability)						(Liability)
	Reserves		$	5,032			$	7,987		$	5,001		$	7,919
	Compensation			3,087				5,075			3,111			5,000
	Post-retirement benefits			1,531				21,338			1,070			19,819
	Property			–				(89,432	)		–			(98,889	)
	Intangible Assets			–				(21,285	)		–			(28,918	)
	Pension			532				(30,412	)		802			(51,148	)
	Inventories			2,758				–			1,491			–
	Other			(783	)			1,171			893			2,377
	Tax carryforwards			8,560				12,660			10,322			16,922
	Subtotal			20,717				(92,898	)		22,690			(126,918	)
	Valuation allowance			(934	)			(2,288	)		(1,255	)		(4,905	)
	Total		$	19,783			$	(95,186	)	$	21,435		$	(131,823	)

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Stock Only Stock Appreciation Rights (SOSARs) [Member]
Summary of Stock Option Activity	The following table sets forth information related to outstanding SOSARS:
		2014						2013					2012
	SOSARS		Shares			Wtd Avg			Shares			Wtd Avg		Shares			Wtd Avg
						Exercise Price						Exercise Price					Exercise Price
	Outstanding at January 1,		1,977,133		$	13.91			2,121,454		$	12.93		2,298,288		$	12.35
	Granted		281,881			29.78			368,687			18.51		364,114			15.58
	Exercised		(364,465	)		13.99			(435,562	)		12.63		(500,074	)		12.06
	Canceled / forfeited		(29,842	)		19.36			(77,446	)		16.28		(40,874	)		14.31
	Outstanding at December 31,		1,864,707		$	16.2			1,977,133		$	13.91		2,121,454		$	12.93
	Exercisable at December 31,		1,285,998			12.94			1,330,816			12.58		1,469,537			12.3
	Vested and expected to vest		1,754,295						1,863,244					2,055,599
	SOSAR Grants
	Weighted average grant date fair value per share	$	9.81					$	5.74				$	4.94
	Aggregate grant date fair value (in thousands)	$	2,764					$	2,103				$	1,797
	Black-Scholes assumptions
	Dividend yield		1.48	%					2.16	%				2.31	%
	Risk free rate of return		1.74	%					1.01	%				1.02	%
	Volatility		37.59	%					39.58	%				41.48	%
	Expected life		6 yrs						6 yrs					6 yrs
	Compensation expense (in thousands)	$	2,086					$	1,591				$	1,448
Restricted Stock Units (RSU) and Performance Share Awards (PSAs) [Member]
Summary of Stock Option Activity	The following table summarizes RSU and PSA activity during the past three years:
	Units		2014			2013			2012
	Balance at January 1,		1,001,814			847,679			788,088
	Granted		178,882			315,196			209,021
	Forfeited		(47,379	)		(47,831	)		(52,800	)
	Shares delivered		(244,375	)		(113,230	)		(96,630	)
	Balance at December 31,		888,942			1,001,814			847,679
Compensation Expense for Stock Option Activity
			2014			2013			2012
	Compensation expense	$	2,652		$	2,882		$	2,576

Retirement_Plans_and_Other_Pos1

Retirement Plans and Other Post-Retirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Schedule of Change in Benefit Obligation and Plan Assets	Claims are paid as reported.
		Pension Benefits						Other Benefits
	In millions	2014			2013			2014			2013
	Change in Benefit Obligation
	Balance at beginning of year	$	487.7		$	528.4		$	54.8		$	63
	Service cost		10.4			11.6			1.5			2.9
	Interest cost		24.8			21.8			2.5			2.1
	Plan amendments		3.6			–			–			–
	Participant contributions		–			–			1.3			1.4
	Actuarial (gain)/loss		83.9			(44.0	)		4.5			(10.5	)
	Benefits paid		(31.5	)		(30.5	)		(4.8	)		(4.1	)
	Effect of currency rate changes		(1.3	)		0.4			–			–
	Balance at end of year	$	577.6		$	487.7		$	59.8		$	54.8
	Change in Plan Assets
	Fair value of plan assets at beginning of year	$	601.2		$	545.7		$	–		$	–
	Actual return on plan assets		66.3			84.2			–			–
	Total contributions		2			1.8			4.8			4.1
	Benefits paid		(31.5	)		(30.5	)		(4.8	)		(4.1	)
	Fair value of plan assets at end of year		638			601.2			–			–
	Funded status at end of year	$	60.4		$	113.5		$	(59.8	)	$	(54.8	)
Summary of Amounts Recognized in Consolidated Balance Sheets	Amounts recognized in the consolidated balance sheets consist of the following as of December 31:
		Pension Benefits						Other Benefits
	In millions	2014			2013			2014			2013
	Other long-term assets	$	102		$	148.9		$	–		$	–
	Current liabilities		(2.0	)		(2.3	)		(3.7	)		(4.0	)
	Other long-term liabilities		(39.6	)		(33.1	)		(56.1	)		(50.8	)
	Net amount recognized	$	60.4		$	113.5		$	(59.8	)	$	(54.8	)
Components of Amounts Recognized as Accumulated Other Comprehensive Income on Pre-Tax Basis	The components of amounts recognized as “Accumulated other comprehensive income” consist of the following on a pre-tax basis:
		Pension Benefits						Other Benefits
	In millions	2014			2013			2014			2013
	Prior service cost/(credit)	$	15.1		$	14.8		$	(1.1	)	$	(1.4	)
	Net actuarial loss		181.3			131.9			5.5			1.4
Weighted-Average Assumptions Used in Computing Benefit Obligations	The weighted-average assumptions used in computing the benefit obligations above were as follows:
		Pension Benefits						Other Benefits
		2014			2013			2014			2013
	Discount rate – benefit obligation		4.21	%		5.2	%		3.89	%		4.52	%
	Future compensation growth rate		4			4			–			–
Information for Pension Plans with Accumulated Benefit Obligation in Excess of Plan Assets	Information for pension plans with an accumulated benefit obligation in excess of plan assets was as follows:
	In millions		2014			2013
	Projected benefit obligation	$	41.7		$	35.4
	Accumulated benefit obligation		36.1			31.6
	Fair value of plan assets		–			–
Schedule of Net Periodic Benefit Cost of Pension and Other Benefits	Net periodic benefit cost includes the following components:
		Year Ended December 31
	In millions		2014			2013			2012
	Pension Benefits
	Service cost	$	10.4		$	11.6		$	11.3
	Interest cost		24.8			21.8			23
	Expected return on plan assets		(43.9	)		(43.4	)		(42.2	)
	Amortization of prior service cost		3.3			3.1			2.5
	Amortization of actuarial loss		12.1			21.1			17
	Total net periodic benefit cost	$	6.7		$	14.2		$	11.6
	Other Benefits
	Service cost	$	1.5		$	2.9		$	2.8
	Interest cost		2.5			2.1			2.4
	Expected return on plan assets		–			–			(0.5	)
	Amortization of prior service cost/(credit)		(0.3	)		(0.5	)		(0.9	)
	Amortization of actuarial loss		0.4			0.6			0.7
	Total net periodic benefit cost	$	4.1		$	5.1		$	4.5
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss)	Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss) were as follows:
		Year Ended
		December 31
	In millions	2014			2013
	Pension Benefits
	Actuarial (gain) loss	$	61.5		$	(84.7	)
	Plan amendments		3.6			–
	Amortization of prior service cost		(3.3	)		(3.1	)
	Amortization of actuarial losses		(12.1	)		(21.1	)
	Total recognized in other comprehensive (income) loss		49.7			(108.9	)
	Total recognized in net periodic benefit cost and other comprehensive (income) loss	$	56.4		$	(94.7	)
	Other Benefits
	Actuarial (gain) loss	$	4.5		$	(10.5	)
	Amortization of prior service cost		0.3			0.5
	Amortization of actuarial losses		(0.4	)		(0.6	)
	Total recognized in other comprehensive (income) loss		4.4			(10.6	)
	Total recognized in net periodic benefit cost and other comprehensive (income) loss	$	8.5		$	(5.5	)
Schedule of Defined Benefit Plan Weighted-Average Assumptions Used in Computing Net Periodic Benefit Cost	The weighted-average assumptions used in computing the net periodic benefit cost information above were as follows:
		Year Ended December 31
		2014			2013			2012
	Pension Benefits
	Discount rate – benefit expense		5.2	%		4.28	%		5.09	%
	Future compensation growth rate		4			4			4
	Expected long-term rate of return on plan assets		8			8.5			8.5
	Other Benefits
	Discount rate – benefit expense		4.52	%		3.58	%		4.45	%
	Expected long-term rate of return on plan assets		–			–			8.5
Schedule of Health Care Cost Trend Rates Used in Calculating Benefit Obligations	Assumed health care cost trend rates used to determine benefit obligations at December 31 were as follows:
		2014			2013
	Health care cost trend rate assumed for next year		7.46	%		7.46	%
	Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		4.5			4.5
	Year that the rate reaches the ultimate rate		2028			2028
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates	Assumed health care cost trend rates have a significant effect on the amounts reported for health care plans. A one percentage-point change in assumed health care cost trend rates would have the following effects:
		One Percentage Point
	In millions	Increase			Decrease
	Effect on:
	Post-retirement benefit obligation	$	5.3		$	4.7
	Total of service and interest cost components		0.4			0.4
Schedule of Target Allocation for Plan Assets	Risk is minimized by diversification by asset class, by style of each manager and by sector and industry limits when applicable. The target allocation for the Plan assets are:
	Domestic Equity
	Large cap		35	%
	Small and mid cap		12
	International equity		13
	Real Estate Investment
	Trusts (REIT)		5
	Fixed income, cash and cash equivalents		35
Schedule of Fair Value of Benefit Plan Assets	The table below presents the fair values of our benefit plan assets by level within the fair value hierarchy, as described in Note 2:
		December 31, 2014
	In millions		Total			Level 1			Level 2			Level 3
	Domestic Equity
	Large cap	$	187.6		$	187.6		$	–		$	–
	Small and mid cap		61.1			61.1			–			–
	International equity		104.5			65.1			39.4			–
	REIT		31.6			31.6			–			–
	Fixed income		235			27.3			207.7			–
	Cash and equivalents		18.2			–			18.2			–
	Total	$	638		$	372.7		$	265.3		$	–
		31-Dec-13
	In millions		Total			Level 1			Level 2			Level 3
	Domestic Equity
	Large cap		$204.60			$204.60		$	–		$	–
	Small and mid cap		68.1			68.1			–			–
	International equity		114.3			73.7			40.6			–
	REIT		25.9			25.9			–			–
	Fixed income		171.6			40.4			131.2			–
	Cash and equivalents		16.7			–			16.7			–
	Total	$	601.2		$	412.7		$	188.5		$	–
Benefit Payments Expected to be Made under Non-Qualified Pension Plans and Other Benefit Plans	Benefit payments expected to be made in 2015 under our non-qualified pension plans and other benefit plans are summarized below:
	In thousands
	Nonqualified pension plans	$	2,108
	Other benefit plans		3,769
Summary of Benefit Expected to be Paid Out	The following benefit payments under all pension and other benefit plans, and giving effect to expected future service, as appropriate, are expected to be paid:
	In thousands		Pension			Other
			Benefits			Benefits
	2015	$	36,012		$	3,769
	2016		35,826			3,987
	2017		36,061			4,450
	2018		35,751			4,808
	2019		35,919			5,202
	2020 through 2024		186,858			40,001

Inventories_Tables

Inventories (Tables)	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventories, Net of Reserves	Inventories, net of reserves were as follows:
		December 31
	In thousands		2014		2013
	Raw materials	$	61,266	$	59,440
	In-process and finished		117,580		109,578
	Supplies		69,859		67,292
	Total	$	248,705	$	236,310

Plant_Equipment_and_Timberland1

Plant, Equipment and Timberlands (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Summary of Plant, Equipment and Timberlands	Plant, equipment and timberlands at December 31 were as follows:
	In thousands		2014			2013
	Land and buildings	$	208,230		$	206,891
	Machinery and equipment		1,265,317			1,279,264
	Furniture, fixtures, and other		157,730			159,674
	Accumulated depreciation		(989,093	)		(976,645	)
			642,184			669,184
	Construction in progress		49,078			47,271
	Asset retirement obligation, net		3,021			4,748
	Timberlands, less depletion		3,325			2,137
	Total	$	697,608		$	723,340

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	The following table sets forth information with respect to goodwill and other intangible assets:
		December 31
	In thousands		2014			2013
	Goodwill – Composite Fibers	$	84,137		$	95,948
	Specialty Papers
	Customer relationships	$	6,155		$	6,155
	Composite Fibers
	Tradename		5,902			10,325
	Technology and related		41,749			46,038
	Customer relationships and related		37,421			42,251
	Advanced Airlaid Materials
	Technology and related		1,500			1,623
	Customer relationships and related		3,042			3,445
	Total intangibles		95,769			109,837
	Accumulated amortization		(18,671	)		(13,756	)
	Net intangibles	$	77,098		$	96,081
Summary of Amortization of Intangible Assets	The following table sets forth information pertaining to amortization of intangible assets:
	In thousands		2014			2013			2012
	Aggregate amortization expense:	$	6,136		$	4,511		$	1,778
	Estimated amortization expense:
	2015		5,859
	2016		5,398
	2017		5,124
	2018		5,124
	2019		5,124

Other_LongTerm_Assets_Tables

Other Long-Term Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Summary of Other Long-Term Assets	Other long-term assets consist of the following:
		December 31
	In thousands		2014		2013
	Pension	$	102,007	$	148,849
	Other		26,032		27,610
	Total	$	128,039	$	176,459

Other_Current_Liabilities_Tabl

Other Current Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Summary of Other Current Liabilities	Other current liabilities consist of the following:
		December 31
	In thousands		2014		2013
	Accrued payroll and benefits	$	39,471	$	41,492
	Other accrued compensation and retirement benefits		7,920		8,372
	Income taxes payable		3,502		6,546
	Accrued rebates		18,910		20,208
	Other accrued expenses		41,274		46,019
	Total	$	111,077	$	122,637

LongTerm_Debt_Tables

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Summary of Long-Term Debt	Long-term debt is summarized as follows:
		December 31
	In thousands		2014			2013
	Revolving credit facility, due Nov. 2016	$	90,555		$	133,540
	5.375% Notes, due Oct. 2020		250,000			250,000
	2.40% Term Loan, due Jun. 2022		12,155			–
	2.05% Term Loan, due Mar. 2023		51,902			58,785
	Total long-term debt		404,612			442,325
	Less current portion		(5,734	)		–
	Long-term debt, net of current portion	$	398,878		$	442,325
Amortization of Term Loan Agreements Together with Maturities of Other Long-term Debt	The following schedule sets forth the amortization of our term loan agreements together with the maturity of our other long-term debt during the indicated year.
	In thousands
	2015	$	5,734
	2016		98,779
	2017		8,224
	2018		8,224
	2019		8,224
	Thereafter		275,427

Asset_Retirement_Obligation_Ta

Asset Retirement Obligation (Tables)	12 Months Ended
	Dec. 31, 2014
Asset Retirement Obligation Disclosure [Abstract]
Schedule of Asset Retirement Obligation	Following is a summary of the reserve for asset retirement obligations for the periods indicated:
	In thousands		2014			2013
	Balance at January 1,	$	5,032		$	8,882
	Accretion		145			229
	Payments		(827	)		(2,824	)
	Gain		(236	)		(1,255	)
	Balance at December 31,	$	4,114		$	5,032
Schedule of Consolidated Balance Sheets where Asset Retirement Obligations Recorded	The following table summarizes the line items in the accompanying consolidated balance sheets where the asset retirement obligations are recorded:
		December 31
	In thousands		2014			2013
	Other current liabilities	$	2,855		$	915
	Other long-term liabilities		1,259			4,117
	Total	$	4,114		$	5,032

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Carrying Value and Fair Value of Long-Term Debt	The following table sets forth the carrying value and fair value of long-term debt as of December 31:
		December 31, 2014				December 31, 2013
	In thousands		Carrying		Fair		Carrying		Fair
			Value		Value		Value		Value
	Variable rate debt	$	90,555	$	90,555	$	133,540	$	133,540
	Fixed-rate bonds		250,000		255,470		250,000		254,533
	2.05% Term loan		51,902		53,106		58,785		57,952
	2.40% Term loan		12,155		12,626		–		–
	Total	$	404,612	$	411,757	$	442,325	$	446,025

Financial_Derivatives_and_Hedg1

Financial Derivatives and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Values of Derivative Instruments	The following table summarizes the fair values of derivative instruments as of December 31 for the year indicated and the line items in the accompanying consolidated balance sheets where the instruments are recorded:
		December 31						December 31
	In thousands		2014			2013			2014			2013
	Balance sheet caption		Prepaid Expenses						Other Current
			and Other						Liabilities
			Current Assets
	Designated as hedging:
	Forward foreign currency exchange contracts	$	3,106		$	–			$394		$	1,163
	Not designated as hedging:
	Forward foreign currency exchange contracts	$	70		$	36			$161		$	46
Income or Loss from Derivative Instruments Recognized in Results of Operations	The following table summarizes the amount of income or loss from derivative instruments recognized in our results of operations for the periods indicated and the line items in the accompanying consolidated statements of income where the results are recorded:
		Year ended December 31
	In thousands		2014			2013			2012
	Designated as hedging:
	Forward foreign currency exchange contracts:
	Effective portion – cost of products sold	$	(655	)	$	(945	)	$	2,183
	Ineffective portion – other – net		184			38			311
	Not designated as hedging:
	Forward foreign currency exchange contracts:
	Other – net	$	1,599		$	(455	)	$	(696	)
Fair Value Amounts Recorded as Component of Accumulated Other Comprehensive Income	A rollforward of fair value amounts recorded as a component of accumulated other comprehensive income is as follows:
	In thousands		2014			2013
	Balance at January 1,	$	(1,296	)	$	(599	)
	Deferred (losses) gains on cash flow hedges		3,923			(1,642	)
	Reclassified to earnings		655			945
	Balance at December 31,	$	3,282		$	(1,296	)
Designated as Hedging [Member]
Outstanding Derivatives Used to Hedge Foreign Exchange Risks	We had the following outstanding derivatives that were used to hedge foreign exchange risks associated with forecasted transactions and designated as hedging instruments:
		December 31
	In thousands		2014			2013
	Derivative		Sell (Buy) Notional
	Sell / Buy
	Euro / U.S. dollar		(32,527	)		(27,105	)
	U.S. dollar / Canadian dollar		(10,036	)		(13,077	)
	Euro / Philippine peso		(523,313	)		–
	British Pound / Philippine peso		(260,535	)		–
	Euro / British Pound		4,592			–
Not Designated as Hedging [Member]
Outstanding Derivatives Used to Hedge Foreign Exchange Risks
		December 31
	In thousands		2014			2013
	Derivative		Sell (Buy) Notional
	Sell / Buy
	U.S. dollar / British Pound		9,000			6,000
	Euro / British Pound		(3,000	)		(8,000	)
	Euro / British Pound		2,000			5,000
	Canadian dollar / U.S. dollar		–			2,000
	U.S. dollar / Euro		4,000			2,000
	Euro / U.S. dollar		–			9,000

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Summary of Outstanding Shares of Common Stock	The following table summarizes outstanding shares of common stock:
		Year ended December 31
	In thousands		2014		2013	2012
	Shares outstanding at beginning of year		43,130		42,784	42,650
	Shares repurchased		(464	)	–	(374	)
	Treasury shares issued for:
	Restricted stock awards		162		86	76
	401(k) plan		116		123	152
	Employee stock options		110		137	280
	exercised
	Shares outstanding at end of year		43,054		43,130	42,784

Share_Repurchases_Tables

Share Repurchases (Tables)	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Summary of Share Repurchases under Stock Repurchase Plan	stock. The following table summarizes share repurchases made under this program through December 31, 2014:
		shares		(thousands)
	Authorized amount		n/a	$	50,000
	Repurchases		755,310		(16,627	)
	Remaining authorization			$	33,373

Commitments_Contingencies_and_1

Commitments, Contingencies and Legal Proceedings (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Summary of Minimum Annual Payment Due on Noncancelable Operating Lease	The following table summarizes the minimum annual payments due on noncancelable operating leases and other similar contractual obligations having initial or remaining terms in excess of one year:
	In thousands		Leases		Other
	2015	$	6,244	$	71,402
	2016		3,742		23,818
	2017		2,256		1,176
	2018		1,392		536
	2019		394		98
	Thereafter		1		–

Segment_and_Geographic_Informa1

Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2014
Schedule of Financial and Other Information by Business Unit	The following tables set forth profitability and other information by business unit:
	For the year ended December 31, 2014		Composite		Advanced		Specialty		Other and			Total
	In millions		Fibers		Airlaid		Papers		Unallocated
					Materials
	Net sales	$	617.9	$	281.7	$	902.9	$	–		$	1,802.40
	Energy and related sales, net		–		–		7.9		–			7.9
	Total revenue		617.9		281.7		910.8		–			1,810.30
	Cost of products sold		498		247.6		821.8		7.8			1,575.20
	Gross profit		119.9		34.1		89		(7.8	)		235.2
	SG&A		51.6		8.8		50.4		22.4			133.2
	Gains on dispositions of plant, equipment and timberlands, net		–		–		–		(4.9	)		(4.9	)
	Total operating income (loss)		68.3		25.3		38.6		(25.3	)		106.8
	Non-operating expense		–		–		–		(19.4	)		(19.4	)
	Income (loss) before income taxes	$	68.3	$	25.3	$	38.6	$	(44.7	)	$	87.4
	Supplementary Data
	Plant, equipment and timberlands, net	$	277.8	$	163.6	$	250.1	$	6.1		$	697.6
	Depreciation, depletion and amortization		29.7		9.1		29.9		1.9			70.6
	Capital expenditures		23.9		7.6		32.1		2.4			66
	For the year ended December 31, 2013		Composite		Advanced		Specialty		Other and			Total
	In millions		Fibers		Airlaid		Papers		Unallocated
					Materials
	Net sales	$	566.4	$	268.4	$	887.9	$	–		$	1,722.60
	Energy and related sales, net		–		–		3.2		–			3.2
	Total revenue		566.4		268.4		891		–			1,725.80
	Cost of products sold		456.5		238		799.3		13.3			1,507.10
	Gross profit		109.8		30.4		91.7		(13.3	)		218.7
	SG&A		47.4		8.9		52		25.5			133.9
	Gains on dispositions of plant, equipment and timberlands, net		–		–		–		(1.7	)		(1.7	)
	Total operating income (loss)		62.4		21.5		39.7		(37.1	)		86.5
	Non-operating expense		–		–		–		(17.3	)		(17.3	)
	Income (loss) before income taxes	$	62.4	$	21.5	$	39.7	$	(54.4	)	$	69.2
	Supplementary Data
	Plant, equipment and timberlands, net	$	300	$	175.1	$	242.6	$	5.6		$	723.3
	Depreciation, depletion and amortization		24.8		8.9		33.2		1.3			68.2
	Capital expenditures		56.9		6.7		34.3		5.1			103
	For the year ended December 31, 2012		Composite		Advanced		Specialty		Other and			Total
	In millions		Fibers		Airlaid		Papers		Unallocated
					Materials
	Net sales	$	436.7	$	246.3	$	894.8	$	–		$	1,577.80
	Energy and related sales, net		–		–		7		–			7
	Total revenue		436.7		246.3		901.8		–			1,584.80
	Cost of products sold		362.6		218.7		779.5		10.3			1,371.10
	Gross profit		74.2		27.6		122.3		(10.4	)		213.6
	SG&A		38.1		9.6		55		18.9			121.6
	Gains on dispositions of plant, equipment and timberlands, net		–		–		–		(9.8	)		(9.8	)
	Total operating income (loss)		36.1		18		67.3		(19.5	)		101.9
	Non-operating expense		–		–		–		(22.9	)		(22.9	)
	Income (loss) before income taxes	$	36.1	$	18	$	67.3	$	(42.4	)	$	78.9
	Supplementary Data
	Plant, equipment and timberlands, net	$	200.1	$	172.9	$	247.9	$	0.3		$	621.2
	Depreciation, depletion and amortization		23.5		8.7		37.4		–			69.5
	Capital expenditures		31.4		3.9		23.1		0.3			58.8
Schedule of Net Sales to External Customers and Location of Net Plant, Equipment and Timberlands	Our net sales to external customers and location of net plant, equipment and timberlands are summarized below. Net sales are attributed to countries based upon origin of shipment.
		2014				2013					2012
	In thousands		Net sales		Plant,		Net sales		Plant,			Net sales			Plant,
					Equipment and				Equipment and						Equipment and
					Timberlands–Net				Timberlands–Net						Timberlands–Net
	United States	$	980,933	$	256,251	$	968,833	$	248,306		$	952,195		$	248,185
	Germany		529,003		257,311		483,859		287,880			358,442			191,559
	United Kingdom		103,219		62,617		107,082		63,650			119,092			59,131
	Canada		129,401		82,774		113,414		83,033			106,702			83,796
	Other		59,859		38,655		49,427		40,471			41,357			38,515
	Total	$	1,802,415	$	697,608	$	1,722,615	$	723,340		$	1,577,788		$	621,186
Advanced Airlaid Materials [Member]
Schedule of Segment Reporting Information of Revenue by Segment	Advanced Airlaid Materials’ revenue composition by market consisted of the following for the years indicated:
	In thousands		2014		2013		2012
	Feminine hygiene	$	216,836	$	219,222	$	197,792
	Adult incontinence		17,586		5,046		6,959
	Wipes		16,002		15,186		13,562
	Home care		15,401		14,857		14,527
	Other		15,848		14,085		13,442
	Total	$	281,673	$	268,396	$	246,282
Specialty Papers [Member]
Schedule of Segment Reporting Information of Revenue by Segment	Specialty Papers’ revenue composition by market consisted of the following for the years indicated:
	In thousands		2014		2013		2012
	Carbonless & forms	$	376,959	$	369,618	$	372,950
	Engineered products		194,189		184,913		187,724
	Envelope & converting		183,194		175,928		174,781
	Book publishing		144,744		153,054		155,925
	Other		3,805		4,346		3,397
	Total	$	902,891	$	887,859	$	894,777
Composite Fibers [Member]
Schedule of Segment Reporting Information of Revenue by Segment	Composite Fibers’ revenue composition by market consisted of the following for the years indicated:
	In thousands		2014		2013		2012
	Food & beverage	$	296,304	$	302,738	$	265,423
	Wall covering		149,957		97,698		–
	Metallized		80,839		83,949		87,720
	Composite laminates		38,159		39,296		44,613
	Technical specialties and other		52,592		42,679		38,984
	Total	$	617,851	$	566,360	$	436,740

Condensed_Consolidating_Financ1

Condensed Consolidating Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Statement of Income	Condensed Consolidating Statement of Income for the
	year ended December 31, 2014
	In thousands	Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
	Net sales	$	902,892		$	35		$	899,523		$	(35	)	$	1,802,415
	Energy and related sales, net		7,927			–			–			–			7,927
	Total revenues		910,819			35			899,523			(35	)		1,810,342
	Costs of products sold		829,336			34			745,853			(35	)		1,575,188
	Gross profit		81,483			1			153,670			–			235,154
	Selling, general and administrative expenses		67,086			492			65,657			–			133,235
	Gains on dispositions of plant, equipment and timberlands, net		(3,545	)		(1,316	)		–			–			(4,861	)
	Operating income		17,942			825			88,013			–			106,780
	Other non-operating income (expense)
	Interest expense		(19,105	)		–			(102,571	)		102,755			(18,921	)
	Interest income		638			102,241			36			(102,756	)		159
	Equity in earnings of subsidiaries		66,628			(35,226	)		–			(31,402	)		–
	Other, net		(1,366	)		314			417			–			(635	)
	Total other non-operating income (expense)		46,795			67,329			(102,118	)		(31,403	)		(19,397	)
	Income (loss) before income taxes		64,737			68,154			(14,105	)		(31,403	)		87,383
	Income tax (benefit) provision		(4,509	)		3,060			19,586			–			18,137
	Net income (loss)		69,246			65,094			(33,691	)		(31,403	)		69,246
	Other comprehensive (loss) income		(79,513	)		(40,704	)		28,840			11,864			(79,513	)
	Comprehensive (loss) income	$	(10,267	)	$	24,390		$	(4,851	)	$	(19,539	)	$	(10,267	)
	Condensed Consolidating Statement of Income for the
	year ended December 31, 2013
	In thousands	Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
	Net sales	$	887,859		$	16		$	834,756		$	(16	)	$	1,722,615
	Energy and related sales, net		3,153			–			–			–			3,153
	Total revenues		891,012			16			834,756			(16	)		1,725,768
	Costs of products sold		812,298			15			694,819			(24	)		1,507,108
	Gross profit		78,714			1			139,937			8			218,660
	Selling, general and administrative expenses		69,614			718			63,535			–			133,867
	Gains on dispositions of plant, equipment and timberlands, net		(1,390	)		(319	)		(17	)		–			(1,726	)
	Operating income (loss)		10,490			(398	)		76,419			8			86,519
	Other non-operating income (expense)
	Interest expense		(18,891	)		–			(8,064	)		8,990			(17,965	)
	Interest income		627			8,662			12			(8,991	)		310
	Equity in earnings of subsidiaries		58,412			48,538			–			(106,950	)		–
	Other, net		(1,569	)		104			1,802			–			337
	Total other non-operating income (expense)		38,579			57,304			(6,250	)		(106,951	)		(17,318	)
	Income before income taxes		49,069			56,906			70,169			(106,943	)		69,201
	Income tax (benefit) provision		(18,089	)		453			19,675			4			2,043
	Net income		67,158			56,453			50,494			(106,947	)		67,158
	Other comprehensive income		88,609			6,883			4,223			(11,106	)		88,609
	Comprehensive income	$	155,767		$	63,336		$	54,717		$	(118,053	)	$	155,767
	Condensed Consolidating Statement of Income for the
	year ended December 31, 2012
	In thousands	Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
	Net sales	$	894,777		$	14		$	683,022		$	(25	)	$	1,577,788
	Energy and related sales, net		7,000			–			–			–			7,000
	Total revenues		901,777			14			683,022			(25	)		1,584,788
	Costs of products sold		789,589			13			581,544			(7	)		1,371,139
	Gross profit		112,188			1			101,478			(18	)		213,649
	Selling, general and administrative expenses		73,877			169			47,544			–			121,590
	Gains on dispositions of plant, equipment and timberlands, net		(9,790	)		–			(25	)		–			(9,815	)
	Operating income (loss)		48,101			(168	)		53,959			(18	)		101,874
	Other non-operating income (expense)
	Interest expense		(22,311	)		(57	)		(3,891	)		7,565			(18,694	)
	Interest income		452			7,191			382			(7,565	)		460
	Equity in earnings of subsidiaries		40,682			33,954			–			(74,636	)		–
	Other, net		(6,459	)		477			1,283			–			(4,699	)
	Total other non-operating income (expense)		12,364			41,565			(2,226	)		(74,636	)		(22,933	)
Income before income taxes		60,465			41,397			51,733			(74,654	)		78,941
Income tax provision		1,086			1,587			16,889			–			19,562
Net income		59,379			39,810			34,844			(74,654	)		59,379
Other comprehensive income		2,775			3,243			3,920			(7,163	)		2,775
Comprehensive income	$	62,154		$	43,053		$	38,764		$	(81,817	)	$	62,154
Condensed Consolidating Balance Sheet	Condensed Consolidating Balance Sheet as of December 31, 2014
	In thousands	Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
	Assets
	Cash and cash equivalents	$	42,208		$	514		$	57,115		$	—		$	99,837
	Other current assets		218,544			420,451			263,567			(427,777	)		474,785
	Plant, equipment and timberlands, net		255,255			991			441,362			—			697,608
	Investments in subsidiaries		824,480			399,931			—			(1,224,411	)		—
	Other assets		121,125			—			186,129			(17,980	)		289,274
	Total assets	$	1,461,612		$	821,887		$	948,173		$	(1,670,168	)	$	1,561,504
	Liabilities and Shareholders’ Equity
	Current liabilities	$	403,662		$	3,394		$	307,737		$	(435,062	)	$	279,731
	Long-term debt		250,000			—			721,457			(572,579	)		398,878
	Deferred income taxes		46,483			(453	)		70,275			(12,289	)		104,016
	Other long-term liabilities		112,358			—			11,633			5,779			129,770
	Total liabilities		812,503			2,941			1,111,102			(1,014,151	)		912,395
	Shareholders’ equity		649,109			818,946			(162,929	)		(656,017	)		649,109
	Total liabilities and shareholders’ equity	$	1,461,612		$	821,887		$	948,173		$	(1,670,168	)	$	1,561,504
	Condensed Consolidating Balance Sheet as of December 31, 2013
	In thousands	Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
	Assets
	Cash and cash equivalents	$	56,216		$	501		$	66,165		$	—		$	122,882
	Other current assets		208,814			327,152			253,779			(326,045	)		463,700
	Plant, equipment and timberlands, net		247,243			1,054			475,043			—			723,340
	Investments in subsidiaries		803,688			468,533			—			(1,272,221	)		—
	Other assets		170,060			—			214,301			(15,873	)		368,488
	Total assets	$	1,486,021		$	797,240		$	1,009,288		$	(1,614,139	)	$	1,678,410
	Liabilities and Shareholders’ Equity
	Current liabilities	$	375,535		$	2,855		$	247,855		$	(337,878	)	$	288,367
	Long-term debt		250,000			—			513,120			(320,795	)		442,325
	Deferred income taxes		70,989			(283	)		78,633			(8,319	)		141,020
	Other long-term liabilities		105,021			—			13,792			3,409			122,222
	Total liabilities		801,545			2,572			853,400			(663,583	)		993,934
	Shareholders’ equity		684,476			794,668			155,888			(950,556	)		684,476
	Total liabilities and shareholders’ equity	$	1,486,021		$	797,240		$	1,009,288		$	(1,614,139	)	$	1,678,410
Condensed Consolidating Statement of Cash Flows	Condensed Consolidating Statement of Cash Flows for the year
	ended December 31, 2014
	In thousands	Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
	Net cash provided (used) by
	Operating activities	$	36,240		$	4,158		$	59,179		$	–		$	99,577
	Investing activities
	Expenditures for purchases of plant, equipment and timberlands		(34,518	)		–			(31,528	)		–			(66,046	)
	Proceeds from disposal plant, equipment and timberlands, net		3,707			1,355			10			–			5,072
	Repayments from intercompany loans		–			20,840			–			(20,840	)		–
	Advances of intercompany loans		(12,671	)		(26,340	)		–			39,011			–
	Acquisitions, net of cash acquired		–			–			(8,015	)		–			(8,015	)
	Other		(600	)		–			–			–			(600	)
	Total investing activities		(44,082	)		(4,145	)		(39,533	)		18,171			(69,589	)
	Financing activities
	Net repayments of indebtedness		–			–			(18,128	)		–			(18,128	)
	Payment of dividends to shareholders		(18,696	)		–			–			–			(18,696	)
	Repurchases of common stock		(12,180	)		–			–			–			(12,180	)
	Repayments of intercompany loans		–			–			(20,840	)		20,840			–
	Borrowings of intercompany loans		26,340			–			12,671			(39,011	)		–
	Payments related to share-based compensation awards and other		(1,630	)		–			(247	)		–			(1,877	)
	Total financing activities		(6,166	)		–			(26,544	)		(18,171	)		(50,881	)
	Effect of exchange rate on cash		–			–			(2,152	)		–			(2,152	)
	Net (decrease) increase in cash		(14,008	)		13			(9,050	)		–			(23,045	)
	Cash at the beginning of period		56,216			501			66,165			–			122,882
	Cash at the end of period	$	42,208		$	514		$	57,115		$	–		$	99,837
	Condensed Consolidating Statement of Cash Flows for the year
	ended December 31, 2013
	In thousands	Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
	Net cash provided (used) by
	Operating activities	$	55,507		$	4,974		$	113,154		$	–		$	173,635
	Investing activities
	Expenditures for plant, equipment and timberlands		(39,496	)		–			(63,551	)		–			(103,047	)
	Proceeds from disposals of plant, equipment and timberlands, net		1,435			333			179			–			1,947
	Repayments from intercompany loans		–			18,223			–			(18,223	)		–
	Advances of intercompany loans		–			(27,216	)		–			27,216			–
	Intercompany capital contributed		–			(91	)		–			91			–
	Acquisitions, net of cash acquired		–			–			(210,911	)		–			(210,911	)
	Other		(425	)		–			–			–			(425	)
	Total investing activities		(38,486	)		(8,751	)		(274,283	)		9,084			(312,436	)
	Financing activities
	Net proceeds from indebtedness		–			–			182,230			–			182,230
	Payments of note offering costs		(160	)		–			(259	)		–			(419	)
	Payment of dividends to shareholders		(16,965	)		–			–			–			(16,965	)
	Repayments of intercompany loans		(1,100	)					(17,123	)		18,223			–
	Borrowings of intercompany loans		15,310						11,906			(27,216	)		–
	Intercompany capital received		–			–			91			(91	)		–
	Payments for share-based compensation awards and other		(1,671	)		–			–			–			(1,671	)
	Total financing activities		(4,586	)		–			176,845			(9,084	)		163,175
	Effect of exchange rate on cash		–			–			829			–			829
	Net increase (decrease) in cash		12,435			(3,777	)		16,545			–			25,203
	Cash at the beginning of period		43,781			4,278			49,620			–			97,679
	Cash at the end of period	$	56,216		$	501		$	66,165		$	–		$	122,882
	Condensed Consolidating Statement of Cash Flows for the year
	ended December 31, 2012
	In thousands	Parent			Guarantors			Non			Adjustments/			Consolidated
		Company						Guarantors			Eliminations
	Net cash provided (used) by
	Operating activities	$	25,787		$	5,958		$	81,101		$	–		$	112,846
	Investing activities
	Expenditures for plant, equipment and timberlands		(23,463	)		–			(35,289	)		–			(58,752	)
	Proceeds from disposals of plant, equipment and timberlands, net		10,236			–			36			–			10,272
	Repayments from intercompany loans		6,088			29,343			–			(35,431	)		–
Advances of intercompany loans		(91	)		(34,375	)		(514	)		34,980			–
Other		(225	)		–			–			–			(225	)
Total investing activities		(7,455	)		(5,032	)		(35,767	)		(451	)		(48,705	)
Financing activities
Net proceeds from indebtedness		17,869			–			–			–			17,869
Payments of note offering costs		(4,748	)		–			–			–			(4,748	)
Payment of dividends to shareholders		(15,608	)		–			–			–			(15,608	)
Repurchases of common stock		(5,675	)		–			–			–			(5,675	)
Repayments of intercompany loans		–			–			(35,431	)		35,431			–
Borrowings of intercompany loans		27,875			514			6,591			(34,980	)		–
Proceeds from stock options exercised and other		2,673			–			–			–			2,673
Total financing activities		22,386			514			(28,840	)		451			(5,489	)
Effect of exchange rate on cash		–			–			750			–			750
Net increase in cash		40,718			1,440			17,244			–			59,402
Cash at the beginning of period		3,063			2,838			32,376			–			38,277
Cash at the end of period	$	43,781		$	4,278		$	49,620		$	–		$	97,679

Quarterly_Results_Tables

Quarterly Results (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Net Income (Loss) and Earnings (Loss) Per Share
	In thousands,	Net sales					Gross Profit						Net Income				Diluted earnings per
	except per share																share
		2014			2013		2014			2013			2014		2013		2014		2013
	First	$	455,721		$	405,189	$	55,040		$	57,375		$	14,648	$	15,629	$	0.33	$	0.36
	Second		445,341			425,967		41,437			40,840			4,669		933		0.11		0.02
	Third		465,092			456,648		80,513			66,039			30,372		34,119		0.69		0.77
	Fourth		436,261			434,811		58,164			54,406			19,557		16,477		0.45		0.37
Impact of Certain Factors on Income (Loss) and Earning (Loss) Per Share	The information set forth above for net income and earnings per share includes the impact of the following, on an after-tax basis:
		Asset Impairment					Restructuring Costs &						Alternative Fuel				Gains on Sales of Plant				Acquisition
		Charge					Workforce Efficiency						Mixture/ Cellulosic				Equipment and Timberlands				Integration Costs
													Biofuel Credits
	In thousands	2014			2013		2014			2013			2014		2013		2014		2013		2014			2013
	First	$	–		$	–	$	–		$	(260	)	$	–	$	–	$	507	$	282	$	–		$	(1,761	)
	Second		–			–		–			(193	)		–		–		872		–		–			(3,969	)
	Third		(2,356	)		–		–			(117	)		1,032		9,866		1,004		142		(115	)		(154	)
	Fourth		–			–		(373	)		(60	)		81		450		612		1,301		(487	)		(194	)

Accounting_Policies_Additional

Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Maturity period of cash and cash equivalents	Three months or less

Accounting_Policies_Schedule_o

Accounting Policies - Schedule of Range of Estimated Service Lives (Detail)	12 Months Ended
	Dec. 31, 2014
Minimum [Member]
Property Plant And Equipment Useful Life [Abstract]
Range of estimated service lives	5 years
Maximum [Member]
Property Plant And Equipment Useful Life [Abstract]
Range of estimated service lives	30 years
Buildings [Member] | Minimum [Member]
Property Plant And Equipment Useful Life [Abstract]
Range of estimated service lives	15 years
Buildings [Member] | Maximum [Member]
Property Plant And Equipment Useful Life [Abstract]
Range of estimated service lives	45 years
Machinery and Equipment [Member] | Minimum [Member]
Property Plant And Equipment Useful Life [Abstract]
Range of estimated service lives	5 years
Machinery and Equipment [Member] | Maximum [Member]
Property Plant And Equipment Useful Life [Abstract]
Range of estimated service lives	40 years
Other [Member] | Minimum [Member]
Property Plant And Equipment Useful Life [Abstract]
Range of estimated service lives	3 years
Other [Member] | Maximum [Member]
Property Plant And Equipment Useful Life [Abstract]
Range of estimated service lives	25 years

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended	8 Months Ended	0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 30, 2013	Dec. 31, 2013	Oct. 01, 2014
Business Acquisition [Line Items]
Revenue	$1,810,342,000	$1,725,768,000	$1,584,788,000
Payment made for acquisition, net of cash acquired	8,015,000	210,911,000
Revenue		1,779,434,000	1,727,538,000
Remaining useful life of intangible assets	17 years
Goodwill	84,137,000	95,948,000			95,948,000
Intangible assets	87,596,000
Identifiable intangible assets	9,800,000
Operating income	106,780,000	86,519,000	101,874,000
Acquisition related costs		3,200,000
Fair value write up of acquired inventory		1,100,000
Integration related costs		2,000,000
Minimum [Member]
Business Acquisition [Line Items]
Useful life of property plant and equipment	5 years
Maximum [Member]
Business Acquisition [Line Items]
Useful life of property plant and equipment	30 years
Dresden Papier GmbH [Member]
Business Acquisition [Line Items]
Date of acquisition	30-Apr-13
Revenue					101,800,000
Payment made for acquisition, net of cash acquired				210,911,000
Revenue		158,600,000
Number of employees		146
Manufacturing capacity		72,800
Goodwill	74,900,000
Intangible assets	87,600,000
Operating income					18,300,000
Spezialpapierfabrik Oberschmitten GmbH [Member]
Business Acquisition [Line Items]
Date of acquisition	1-Oct-14
Payment made for acquisition						8,000,000
Revenue						$33,000,000

Acquisitions_Summary_of_Alloca

Acquisitions - Summary of Allocation of Purchase Price to Assets Acquired and Liabilities Assumed (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Assets
Cash and cash equivalents	$12,227
Accounts receivable	23,870
Inventory	13,864
Prepaid and other current assets	8,060
Plant, equipment and timberlands	60,951
Intangible assets	87,596
Goodwill	74,870
Total assets	281,438
Liabilities
Accounts payable	20,253
Deferred tax liabilities	36,120
Other long term liabilities	1,927
Total liabilities	58,300
Total	223,138
Total	223,138
less cash acquired	-12,227
Total purchase price	$210,911

Acquisitions_Summary_of_Pro_Fo

Acquisitions - Summary of Pro Forma Financial Information (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Pro forma
Net sales	$1,779,434	$1,727,538
Net income	$80,381	$79,075
Diluted earnings per share	$1.82	$1.81

Energy_and_Related_Sales_Net_S

Energy and Related Sales, Net - Summary of Energy and Related Sales Net (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Energy And Related Sales Net [Abstract]
Energy sales	$11,886	$8,189	$5,284
Costs to produce	-6,204	-6,784	-4,187
Net	5,682	1,405	1,097
Renewable energy credits	2,245	1,748	5,903
Total	$7,927	$3,153	$7,000

Gain_on_Dispositions_of_Plant_2

Gain on Dispositions of Plant, Equipment and Timberlands - Summary for Sale of Timberlands and Other Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Proceeds	$5,072	$1,947	$10,272
Gain	4,861	1,726	9,815
Timberlands [Member]
Property, Plant and Equipment [Line Items]
Acres	2,753	876	4,830
Proceeds	5,062	1,445	9,494
Gain	4,855	1,410	9,203
Other [Member]
Property, Plant and Equipment [Line Items]
Proceeds	10	502	778
Gain	$6	$316	$612

Asset_Impairment_Charge_Additi

Asset Impairment Charge - Additional Information (Detail) (USD $)	12 Months Ended	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Non-cash asset impairment charge	$3,262
Dresden Papier GmbH [Member] | Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Non-cash asset impairment charge		$3,300

Earnings_Per_Share_Details_of_

Earnings Per Share - Details of Basic and Diluted Earnings Per Share (EPS) (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Net income									$69,246	$67,158	$59,379
Weighted average common shares outstanding used in basic EPS									43,201	43,158	42,851
Common shares issuable upon exercise of dilutive stock options and PSAs / RSUs									865	1,141	821
Weighted average common shares outstanding and common share equivalents used in diluted EPS									44,066	44,299	43,672
Earnings per share
Basic									$1.60	$1.56	$1.39
Diluted	$0.45	$0.69	$0.11	$0.33	$0.37	$0.77	$0.02	$0.36	$1.57	$1.52	$1.36

Earnings_Per_Share_Number_of_P

Earnings Per Share - Number of Potential Common Shares that have been Excluded from Computation of Diluted Earnings Per Share for Indicated Period Due to Their Anti-Dilutive Nature (Detail)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Potential common shares	277	7	8

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income - Schedule of Changes in Accumulated Other Comprehensive Income (Losses) (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	($75,357)	($163,966)	($166,741)
Other comprehensive income before reclassifications (net of tax)	-89,608	72,721	-7,582
Amounts reclassified from accumulated other comprehensive income (net of tax)	10,095	15,888	10,357
Other comprehensive income (loss)	-79,513	88,609	2,775
Ending Balance	-154,870	-75,357	-163,966
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	15,141	315	-11,043
Other comprehensive income before reclassifications (net of tax)	-49,365	14,826	11,358
Other comprehensive income (loss)	-49,365	14,826	11,358
Ending Balance	-34,224	15,141	315
Unrealized Gain (Loss) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	-941	-424	1,185
Other comprehensive income before reclassifications (net of tax)	2,826	-1,198	-39
Amounts reclassified from accumulated other comprehensive income (net of tax)	471	681	-1,570
Other comprehensive income (loss)	3,297	-517	-1,609
Ending Balance	2,356	-941	-424
Change in Pensions [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	-89,547	-159,560	-153,002
Other comprehensive income before reclassifications (net of tax)	-40,266	54,906	-18,657
Amounts reclassified from accumulated other comprehensive income (net of tax)	9,553	15,107	12,099
Other comprehensive income (loss)	-30,713	70,013	-6,558
Ending Balance	-120,260	-89,547	-159,560
Change in Other Postretirement Defined Benefit Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	-10	-4,297	-3,881
Other comprehensive income before reclassifications (net of tax)	-2,803	4,187	-244
Amounts reclassified from accumulated other comprehensive income (net of tax)	71	100	-172
Other comprehensive income (loss)	-2,732	4,287	-416
Ending Balance	($2,742)	($10)	($4,297)

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Losses) (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	$1,575,188	$1,507,108	$1,371,139
Selling, general and administrative	133,235	133,867	121,590
Income tax provision	18,137	2,043	19,562
Reclassifications Out of Accumulated Other Comprehensive Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Net of tax	10,095	15,888	10,357
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	2,503	2,470	2,025
Before tax	15,384	24,217	19,475
Income tax provision	-5,831	-9,110	-7,376
Net of tax	9,553	15,107	12,099
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Pension Benefits [Member] | Prior Service Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Selling, general and administrative	830	649	430
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Pension Benefits [Member] | Actuarial Losses [Member]
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	8,965	16,399	13,764
Selling, general and administrative	3,086	4,699	3,256
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plan Items [Member]
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	-237	-384	-760
Before tax	114	161	-277
Income tax provision	-43	-61	105
Net of tax	71	100	-172
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plan Items [Member] | Prior Service Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Selling, general and administrative	-51	-96	-177
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plan Items [Member] | Actuarial Losses [Member]
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	331	494	511
Selling, general and administrative	71	147	149
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | (Gains) Losses on Cash Flow Hedges [Member]
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	655	945	-2,183
Income tax provision	-184	-264	613
Net of tax	$471	$681	($1,570)

Income_Taxes_Schedule_of_Provi

Income Taxes - Schedule of Provision for Income Taxes from Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current taxes
Federal	$3,291	$625	$8,869
State	238	-4,365	3,386
Foreign	24,027	17,268	9,516
Total current taxes	27,556	13,528	21,771
Deferred taxes and other
Federal	-3,975	-10,973	-5,456
State	-147	-474	-920
Foreign	-5,297	-38	4,167
Total deferred taxes and other	-9,419	-11,485	-2,209
Income tax provision	$18,137	$2,043	$19,562

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Contingency [Line Items]
Deferred taxes and other included a deferred tax benefit	$9,600,000	$15,100,000	$2,300,000
Other taxes total expense	200,000	3,600,000	100,000
Federal income tax rate	35.00%	35.00%	35.00%
Valuation allowance	3,200,000	6,200,000
Research and development, tax credit	1,800,000	3,000,000	400,000
Unremitted earnings, reinvested	305,600,000	288,800,000
Deferred tax liability	0
Gross unrecognized tax benefits	14,900,000	14,900,000	30,400,000	29,700,000
Unrecognized tax benefits that would impact effective tax rate	14,900,000
Lower range of gross unrecognized tax benefits balance may decrease within the next twelve months	0
Higher range of gross unrecognized tax benefits balance may decrease within the next twelve months	5,200,000
United States - State [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards	86,900,000
Tax credit carryforwards	400,000
United States - State [Member] | Minimum [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards expiration year	2015
Tax credit carryforwards expiration year	2015
United States - State [Member] | Maximum [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards expiration year	2031
Tax credit carryforwards expiration year	2027
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards	24,600,000
Tax credit carryforwards	$3,300,000
Foreign Tax Authority [Member] | Minimum [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards expiration year	2019
Tax credit carryforwards expiration year	2020
Foreign Tax Authority [Member] | Maximum [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards expiration year	2033
Tax credit carryforwards expiration year	2034

Income_Taxes_Schedule_of_Domes

Income Taxes - Schedule of Domestic and Foreign Components of Pretax Income from Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
United States	$4,637	($3,052)	$24,525
Foreign	82,746	72,253	54,416
Income before income taxes	$87,383	$69,201	$78,941

Income_Taxes_Schedule_of_Recon

Income Taxes - Schedule of Reconciliation of Federal Statutory Rate to Company's Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal income tax provision at statutory rate	35.00%	35.00%	35.00%
State income taxes, net of federal income tax benefit	0.20%	0.50%	1.30%
Foreign income tax rate differential	-5.00%	-5.00%	-3.90%
Change in statutory tax rates	-2.20%	-0.60%	-0.80%
Tax credits	-2.00%	-4.40%	-0.50%
Change in unrecognized tax benefits, net	1.30%	-22.70%	0.40%
Permanent differences on non-U.S. earnings	-2.80%	-0.40%
Cellulosic biofuel credit, net of incremental state tax and manufacturing deduction benefit			-6.10%
Valuation allowance	-2.70%
Other	-1.00%	0.60%	-0.60%
Provision for income taxes	20.80%	3.00%	24.80%

Income_Taxes_Schedule_of_Curre

Income Taxes - Schedule of Current and Non-Current Deferred Tax Assets and Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Income Tax Disclosure [Abstract]
Reserves, Current	$5,032	$5,001
Compensation, Current	3,087	3,111
Post-retirement benefits, Current	1,531	1,070
Intangible Assets, Current	0	0
Pension, Current	532	802
Inventories, Current	2,758	1,491
Other	-783	893
Tax carryforwards, Current	8,560	10,322
Subtotal, Current	20,717	22,690
Valuation allowance, Current	-934	-1,255
Total, Current	19,783	21,435
Reserves, Non-current	7,987	7,919
Compensation, Non-current	5,075	5,000
Post-retirement benefits, Non-current	21,338	19,819
Property, Non-current	-89,432	-98,889
Intangible Assets, Non-current	-21,285	-28,918
Pension, Non-current	-30,412	-51,148
Other, Non-current	1,171	2,377
Tax carryforwards, Non-current	12,660	16,922
Subtotal, Non-current	-92,898	-126,918
Valuation allowance, Non-current	-2,288	-4,905
Total, Non-current	($95,186)	($131,823)

Income_Taxes_Schedule_of_Curre1

Income Taxes - Schedule of Current and Non-Current Deferred Tax Assets and Liabilities Balance Sheet Captions (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Income Tax Disclosure [Abstract]
Prepaid expenses and other current assets	$20,017	$21,447
Other assets	8,830	9,197
Other current liabilities	234	12
Deferred income taxes	$104,016	$141,020

Income_Taxes_Schedule_of_Unrec

Income Taxes - Schedule of Unrecognized Tax Benefit (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Beginning balance	$14.90	$30.40	$29.70
Increases in tax positions for prior years	0.7	0.2	1.4
Decreases in tax positions for prior years	-0.5	-4.9	-1
Acquisition related:
Purchase Accounting	0.3	1.3
Increases in tax positions for current year	3.4	1.7	1.9
Settlements	-1.3		-0.4
Lapse in statutes of limitation	-2.6	-13.8	-1.2
Ending balance	$14.90	$14.90	$30.40

Income_Taxes_Summary_of_Tax_Ye

Income Taxes - Summary of Tax Years that Remain Subject to Examination by Major Jurisdiction (Detail)	12 Months Ended
	Dec. 31, 2014
United States - Federal [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2013 - 2014
Examination in progress	2011 - 2012
United States - State [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2010 - 2014
Examination in progress	2011 - 2012
Canada [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2010 - 2014
Examination in progress	2009
Germany [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2012 - 2014
Examination in progress	2007 - 2011
France [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2013 - 2014
Examination in progress	2011 - 2012
United Kingdom [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2013 - 2014
Examination in progress	N/A
Philippines [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2012 - 2014
Examination in progress	2011

Income_Taxes_Summary_of_Inform

Income Taxes - Summary of Information Related to Interest and Penalties on Uncertain Tax Positions (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Accrued interest payable	$0.60	$0.60	$1.40
Interest expense (income)		-0.8	-0.3
Penalties	$0	$0	$0

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available for future issuance	1,873,027
Stock Only Stock Appreciation Rights (SOSARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of stock	3 years
Intrinsic value of SOSARs vested and expected to vest	$18.30
The remaining weighted average contractual life of outstanding SOSARs	6 years 4 months 24 days
Restricted Stock Units (RSU) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
The vesting graded scale	Over a three, four, and five-year
Performance Share Awards (PSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative performance targets	3 years
Grants under performance share awards	101,743	183,910	161,083
Percentage of award issued to participants	60.00%
Weighted average grant date fair value	$28.89	$22.34	$15.49
Restricted Stock Units (RSU) and Performance Share Awards (PSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants under performance share awards	178,882	315,196	209,021
Unrecognized compensation expense for outstanding RSUs and PSAs	$4
The weighted average remaining period over which the expense will be recognized	2 years 8 months 12 days

StockBased_Compensation_Summar

Stock-Based Compensation - Summary of RSU and PSA Activity (Detail) (Restricted Stock Units (RSU) and Performance Share Awards (PSAs) [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock Units (RSU) and Performance Share Awards (PSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance	1,001,814	847,679	788,088
Granted	178,882	315,196	209,021
Forfeited	-47,379	-47,831	-52,800
Shares delivered	-244,375	-113,230	-96,630
Ending Balance	888,942	1,001,814	847,679

StockBased_Compensation_Compen

Stock-Based Compensation - Compensation Expense for Periods (Detail) (Restricted Stock Units (RSU) and Performance Share Awards (PSAs) [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock Units (RSU) and Performance Share Awards (PSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$2,652	$2,882	$2,576

StockBased_Compensation_Schedu

Stock-Based Compensation - Schedule of Information Related to Outstanding SOSARS (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised	-110,000	-137,000	-280,000
Stock Only Stock Appreciation Rights (SOSARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Outstanding	1,977,133	2,121,454	2,298,288
Granted	281,881	368,687	364,114
Exercised	-364,465	-435,562	-500,074
Canceled / forfeited	-29,842	-77,446	-40,874
Ending Balance, Outstanding	1,864,707	1,977,133	2,121,454
Exercisable at December 31	1,285,998	1,330,816	1,469,537
Vested and expected to vest	1,754,295	1,863,244	2,055,599
Beginning Balance, Weighted Average Exercise Price, Outstanding	13.91	12.93	12.35
Weighted Average Exercise Price, Granted	29.78	18.51	15.58
Weighted Average Exercise Price, Exercised	13.99	12.63	12.06
Weighted Average Exercise Price, Canceled / forfeited	19.36	16.28	14.31
Ending Balance, Weighted Average Exercise Price, Outstanding	16.2	13.91	12.93
Weighted Average Exercise Price, Exercisable at December 31,	12.94	12.58	12.3
Weighted average grant date fair value per share	9.81	5.74	4.94
Aggregate grant date fair value	2,764	2,103	1,797
Black-Scholes assumptions
Dividend yield	1.48%	2.16%	2.31%
Risk free rate of return	1.74%	1.01%	1.02%
Volatility	37.59%	39.58%	41.48%
Expected life	6 years	6 years	6 years
Compensation expense	2,086	1,591	1,448

Retirement_Plans_and_Other_Pos2

Retirement Plans and Other Post-Retirement Benefits - Schedule of Change in Benefit Obligation and Plan Assets (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in Benefit Obligation
Balance at end of year	$41.70	$35.40
Change in Plan Assets
Fair value of plan assets at end of year	0	0
Pension Benefits [Member]
Change in Benefit Obligation
Balance at beginning of year	487.7	528.4
Service cost	10.4	11.6	11.3
Interest cost	24.8	21.8	23
Plan amendments	3.6
Actuarial (gain)/loss	83.9	-44
Benefits paid	-31.5	-30.5
Effect of currency rate changes	-1.3	0.4
Balance at end of year	577.6	487.7	528.4
Change in Plan Assets
Fair value of plan assets at beginning of year	601.2	545.7
Actual return on plan assets	66.3	84.2
Total contributions	2	1.8
Benefits paid	-31.5	-30.5
Fair value of plan assets at end of year	638	601.2	545.7
Funded status at end of year	60.4	113.5
Other Benefits [Member]
Change in Benefit Obligation
Balance at beginning of year	54.8	63
Service cost	1.5	2.9	2.8
Interest cost	2.5	2.1	2.4
Participant contributions	1.3	1.4
Actuarial (gain)/loss	4.5	-10.5
Benefits paid	-4.8	-4.1
Balance at end of year	59.8	54.8	63
Change in Plan Assets
Total contributions	4.8	4.1
Benefits paid	-4.8	-4.1
Funded status at end of year	($59.80)	($54.80)

Retirement_Plans_and_Other_Pos3

Retirement Plans and Other Post-Retirement Benefits - Summary of Amounts Recognized in Consolidated Balance Sheets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	$60.40	$113.50
Pension Benefits [Member] | Other Long-Term Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	102	148.9
Pension Benefits [Member] | Current Liabilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	-2	-2.3
Pension Benefits [Member] | Other Long-Term Liabilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	-39.6	-33.1
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	-59.8	-54.8
Other Benefits [Member] | Current Liabilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	-3.7	-4
Other Benefits [Member] | Other Long-Term Liabilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	($56.10)	($50.80)

Retirement_Plans_and_Other_Pos4

Retirement Plans and Other Post-Retirement Benefits - Components of Amounts Recognized as Accumulated Other Comprehensive Income on Pre-Tax Basis (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service cost/(credit)	$15.10	$14.80
Net actuarial loss	181.3	131.9
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service cost/(credit)	-1.1	-1.4
Net actuarial loss	$5.50	$1.40

Retirement_Plans_and_Other_Pos5

Retirement Plans and Other Post-Retirement Benefits - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation for all defined benefit pension plans	$553.80	$471.10
Manager's benchmarked performance minimum	40.00%
Treasury bills days	90 days
Defined contribution plans Employees contribution	50.00%
Expense associated with Defined Contribution Plans	2	1.9	1.7
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rates	4.21%	5.20%
Prior service cost as a component of net periodic benefit cost from accumulated other comprehensive income (loss)	3.1
Actuarial net (gain) loss as a component of net periodic benefit cost from accumulated other comprehensive income (loss)	0.3
Pension Benefits [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rates	2.00%
Pension Benefits [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rates	4.36%
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rates	3.89%	4.52%
Prior service cost as a component of net periodic benefit cost from accumulated other comprehensive income (loss)	18.3
Actuarial net (gain) loss as a component of net periodic benefit cost from accumulated other comprehensive income (loss)	$0.40
Other Benefits [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rates	3.56%
Other Benefits [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rates	3.95%

Retirement_Plans_and_Other_Pos6

Retirement Plans and Other Post-Retirement Benefits - Weighted-Average Assumptions Used in Computing Benefit Obligations (Detail)	Dec. 31, 2014	Dec. 31, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate - benefit obligation	4.21%	5.20%
Future compensation growth rate	4.00%	4.00%
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate - benefit obligation	3.89%	4.52%

Retirement_Plans_and_Other_Pos7

Retirement Plans and Other Post-Retirement Benefits - Information for Pension Plans with Accumulated Benefit Obligation in Excess of Plan Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Compensation and Retirement Disclosure [Abstract]
Projected benefit obligation	$41.70	$35.40
Accumulated benefit obligation	36.1	31.6
Fair value of plan assets	$0	$0

Retirement_Plans_and_Other_Pos8

Retirement Plans and Other Post-Retirement Benefits - Schedule of Net Periodic Benefit Cost of Pension and Other Benefits (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$10.40	$11.60	$11.30
Interest cost	24.8	21.8	23
Expected return on plan assets	-43.9	-43.4	-42.2
Amortization of prior service cost/(credit)	3.3	3.1	2.5
Amortization of actuarial loss	12.1	21.1	17
Total net periodic benefit cost	6.7	14.2	11.6
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1.5	2.9	2.8
Interest cost	2.5	2.1	2.4
Expected return on plan assets			-0.5
Amortization of prior service cost/(credit)	-0.3	-0.5	-0.9
Amortization of actuarial loss	0.4	0.6	0.7
Total net periodic benefit cost	$4.10	$5.10	$4.50

Retirement_Plans_and_Other_Pos9

Retirement Plans and Other Post-Retirement Benefits - Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss	$61.50	($84.70)
Plan amendments	3.6
Amortization of prior service cost	-3.3	-3.1	-2.5
Amortization of actuarial losses	-12.1	-21.1	-17
Total recognized in other comprehensive (income) loss	49.7	-108.9
Total recognized in net periodic benefit cost and other comprehensive (income) loss	56.4	-94.7
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss	4.5	-10.5
Amortization of prior service cost	0.3	0.5	0.9
Amortization of actuarial losses	-0.4	-0.6	-0.7
Total recognized in other comprehensive (income) loss	4.4	-10.6
Total recognized in net periodic benefit cost and other comprehensive (income) loss	$8.50	($5.50)

Recovered_Sheet1

Retirement Plans and Other Post-Retirement Benefits - Schedule of Defined Benefit Plan Weighted-Average Assumptions Used in Computing Net Periodic Benefit Cost (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate - benefit expense	5.20%	4.28%	5.09%
Future compensation growth rate	4.00%	4.00%	4.00%
Expected long-term rate of return on plan assets	8.00%	8.50%	8.50%
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate - benefit expense	4.52%	3.58%	4.45%
Expected long-term rate of return on plan assets			8.50%

Recovered_Sheet2

Retirement Plans and Other Post-Retirement Benefits - Schedule of Health Care Cost Trend Rates Used in Calculating Benefit Obligations (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Health care cost trend rate assumed for next year	7.46%	7.46%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.50%	4.50%
Year that the rate reaches the ultimate rate	2028	2028

Recovered_Sheet3

Retirement Plans and Other Post-Retirement Benefits - Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Post-retirement benefit obligation, Increase	$5.30
Total of service and interest cost components, Increase	0.4
Post-retirement benefit obligation, Decrease	4.7
Total of service and interest cost components, Decrease	$0.40

Recovered_Sheet4

Retirement Plans and Other Post-Retirement Benefits - Schedule of Target Allocation for Plan Assets (Detail)	12 Months Ended
	Dec. 31, 2014
Large Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation for the plan assets	35.00%
Small and Mid Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation for the plan assets	12.00%
International Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation for the plan assets	13.00%
Real Estate Investment Trusts (REIT) [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation for the plan assets	5.00%
Fixed Income, Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation for the plan assets	35.00%

Recovered_Sheet5

Retirement Plans and Other Post-Retirement Benefits - Schedule of Fair Value of Benefit Plan Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$0	$0
Large Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	187.6	204.6
Small and Mid Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	61.1	68.1
International Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	104.5	114.3
Real Estate Investment Trusts (REIT) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	31.6	25.9
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	235	171.6
Cash and Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18.2	16.7
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	372.7	412.7
Level 1 [Member] | Large Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	187.6	204.6
Level 1 [Member] | Small and Mid Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	61.1	68.1
Level 1 [Member] | International Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	65.1	73.7
Level 1 [Member] | Real Estate Investment Trusts (REIT) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	31.6	25.9
Level 1 [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27.3	40.4
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	265.3	188.5
Level 2 [Member] | International Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	39.4	40.6
Level 2 [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	207.7	131.2
Level 2 [Member] | Cash and Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$18.20	$16.70

Recovered_Sheet6

Retirement Plans and Other Post-Retirement Benefits - Benefit Payments Expected to be Made under Non-Qualified Pension Plans and Other Benefit Plans (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Nonqualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit payments expected	$2,108
Other Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit payments expected	$3,769

Recovered_Sheet7

Retirement Plans and Other Post-Retirement Benefits - Summary of Benefit Expected to be Paid Out (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	$36,012
2016	35,826
2017	36,061
2018	35,751
2019	35,919
2020 through 2024	186,858
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	3,769
2016	3,987
2017	4,450
2018	4,808
2019	5,202
2020 through 2024	$40,001

Inventories_Inventories_Net_of

Inventories - Inventories, Net of Reserves (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]
Raw materials	$61,266	$59,440
In-process and finished	117,580	109,578
Supplies	69,859	67,292
Total	$248,705	$236,310

Inventories_Additional_Informa

Inventories - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Inventory Disclosure [Abstract]
Inventories using first-in, first-out method	$25.40	$24.50

Plant_Equipment_and_Timberland2

Plant, Equipment and Timberlands - Summary of Plant, Equipment and Timberlands (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Accumulated depreciation	($989,093)	($976,645)
Subtotal	642,184	669,184
Construction in progress	49,078	47,271
Asset retirement obligation, net	3,021	4,748
Timberlands, less depletion	3,325	2,137
Total	697,608	723,340	621,200
Land and Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	208,230	206,891
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,265,317	1,279,264
Furniture, Fixtures, and Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$157,730	$159,674

Plant_Equipment_and_Timberland3

Plant, Equipment and Timberlands - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Property, Plant and Equipment [Abstract]
Accrued capital expenditures	$16.30	$11.90

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Goodwill and Other Intangible Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Goodwill - Composite Fibers	$84,137	$95,948
Total intangibles	95,769	109,837
Accumulated amortization	-18,671	-13,756
Net intangibles	77,098	96,081
Specialty Papers [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Total intangibles	6,155	6,155
Composite Fibers [Member] | Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Total intangibles	5,902	10,325
Composite Fibers [Member] | Technology and Related [Member]
Finite-Lived Intangible Assets [Line Items]
Total intangibles	41,749	46,038
Composite Fibers [Member] | Customer Relationships and Related [Member]
Finite-Lived Intangible Assets [Line Items]
Total intangibles	37,421	42,251
Advanced Airlaid Materials [Member] | Technology and Related [Member]
Finite-Lived Intangible Assets [Line Items]
Total intangibles	1,500	1,623
Advanced Airlaid Materials [Member] | Customer Relationships and Related [Member]
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$3,042	$3,445

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	14 years 8 months 12 days
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	10 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	14 years
Technology and Related [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	14 years
Technology and Related [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	20 years

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets - Summary of Amortization of Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Aggregate amortization expense:	$6,136	$4,511	$1,778
2015	5,859
2016	5,398
2017	5,124
2018	5,124
2019	$5,124

Other_LongTerm_Assets_Summary_

Other Long-Term Assets - Summary of Other Long-Term Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Long-term Investments and Receivables, Net [Abstract]
Pension	$102,007	$148,849
Other	26,032	27,610
Total	$128,039	$176,459

Other_Current_Liabilities_Summ

Other Current Liabilities - Summary of Other Current Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Other Liabilities, Current [Abstract]
Accrued payroll and benefits	$39,471	$41,492
Other accrued compensation and retirement benefits	7,920	8,372
Income taxes payable	3,502	6,546
Accrued rebates	18,910	20,208
Other accrued expenses	41,274	46,019
Total	$111,077	$122,637

LongTerm_Debt_Summary_of_LongT

Long-Term Debt - Summary of Long-Term Debt (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Total long-term debt	$404,612	$442,325
Less current portion	-5,734
Long-term debt, net of current portion	398,878	442,325
Total long-term debt	404,612	442,325
5.375% Notes, Due Oct. 2020 [Member]
Debt Instrument [Line Items]
Total long-term debt	250,000	250,000
Total long-term debt	250,000	250,000
2.40% Term Loan, Due Jun. 2022 [Member]
Debt Instrument [Line Items]
Total long-term debt	12,155
Total long-term debt	12,155
2.05% Term Loan, Due Mar. 2023 [Member]
Debt Instrument [Line Items]
Total long-term debt	51,902	58,785
Total long-term debt	51,902	58,785
Revolving Credit Facility, Due Nov. 2016 [Member]
Debt Instrument [Line Items]
Total long-term debt	90,555	133,540
Total long-term debt	$90,555	$133,540

LongTerm_Debt_Summary_of_LongT1

Long-Term Debt - Summary of Long-Term Debt (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
5.375% Notes, Due Oct. 2020 [Member]
Debt Instrument [Line Items]
Long-term debt, maturity date	31-Oct-20
Interest rate on debt	5.38%	5.38%
2.40% Term Loan, Due Jun. 2022 [Member]
Debt Instrument [Line Items]
Long-term debt, maturity date	30-Jun-22
Interest rate on debt	2.40%
2.05% Term Loan, Due Mar. 2023 [Member]
Debt Instrument [Line Items]
Long-term debt, maturity date	31-Mar-23
Interest rate on debt	2.05%	2.05%
Revolving Credit Facility, Due Nov. 2016 [Member]
Debt Instrument [Line Items]
Long-term debt, maturity date	30-Nov-16

LongTerm_Debt_Additional_Infor

Long-Term Debt - Additional Information (Detail)

0 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Apr. 11, 2013

Apr. 11, 2013

Dec. 31, 2014

Sep. 04, 2014

Sep. 04, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Oct. 03, 2012

Dec. 31, 2014

Nov. 21, 2011

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

USD ($)

IKB Loan [Member]

IKB Loan [Member]

IKB Loan [Member]

2014 IKB Loan [Member]

2014 IKB Loan [Member]

2014 IKB Loan [Member]

Maximum [Member]

Federal Funds Rate [Member]

Other Assets [Member]

5.375% Notes [Member]

5.375% Notes [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility, Due Nov. 2016 [Member]

Revolving Credit Facility, Due Nov. 2016 [Member]

Revolving Credit Facility, Due Nov. 2016 [Member]

Revolving Credit Facility, Due Nov. 2016 [Member]

Revolving Credit Facility, Due Nov. 2016 [Member]

Letters of Credit [Member]

Letters of Credit [Member]

DebtAgreements

USD ($)

EUR (€)

Installment

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

Minimum [Member]

Maximum [Member]

Daily Euro Rate [Member]

Daily Euro Rate [Member]

USD ($)

USD ($)

Installment

Minimum [Member]

Maximum [Member]

Debt Instrument [Line Items]

Line of credit facility, maximum borrowing capacity

$350,000,000

Debt instrument maturity date

15-Oct-20

21-Nov-16

30-Nov-16

Federal fund rate spread

0.50%

0.25%

1.25%

1.25%

2.25%

Margin over Euro-rate

1.00%

Leverage ratio

2.15

3.5

Aggregate principal amount

57,600,000

42,700,000

12,600,000

10,000,000

250,000,000

Percentage of aggregate principal amount of outstanding

2.05%

2.40%

5.38%

5.38%

Frequency of interest payable

Semiannually

Debt instrument redemption

The 5.375% Notes are redeemable, in whole or in part, at anytime on or after October 15, 2016 at the redemption prices specified in the applicable Indenture. Prior to October 15, 2016, we may redeem some or all of the Notes at a "make-whole" premium as specified in the Indenture.

Number of separate loan agreement

2

Number of installments

32

27

Installments beginning date

30-Jun-15

30-Sep-15

Installments ending date

31-Mar-23

30-Jun-22

Aggregated unamortized deferred debt issuance costs

5,100,000

Amortization expense related to deferred debt issuance costs

1,300,000

Letters of credit issued

5,300,000

5,200,000

Letters of credit outstanding

$0

LongTerm_Debt_Amortization_of_

Long-Term Debt - Amortization of Term Loan Agreements Together with Maturities of Other Long-term Debt (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Maturities of Long-term Debt [Abstract]
2015	$5,734
2016	98,779
2017	8,224
2018	8,224
2019	8,224
Thereafter	$275,427

Asset_Retirement_Obligation_Ad

Asset Retirement Obligation - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2008
Asset Retirement Obligation Disclosure [Abstract]
Fair value of asset retirement obligations related to the legal requirements			$11.50
Gain related to the progress of closure activities	$0.20	$1.30

Asset_Retirement_Obligation_Sc

Asset Retirement Obligation - Schedule of Asset Retirement Obligation (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Asset Retirement Obligation Disclosure [Abstract]
Balance at January 1,	$5,032	$8,882
Accretion	145	229
Payments	-827	-2,824
Gain	-236	-1,255
Balance at December 31,	$4,114	$5,032

Asset_Retirement_Obligation_Sc1

Asset Retirement Obligation - Schedule of Consolidated Balance Sheets where Asset Retirement Obligations Recorded (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Asset retirement obligations	$4,114	$5,032	$8,882
Other Current Liabilities [Member]
Asset retirement obligations	2,855	915
Other Long-Term Liabilities [Member]
Asset retirement obligations	$1,259	$4,117

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Carrying Value and Fair Value of Long-Term Debt (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value	$404,612	$442,325
Fair Value	411,757	446,025
Variable Rate Debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value	90,555	133,540
Fair Value	90,555	133,540
Fixed-Rate Bonds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value	250,000	250,000
Fair Value	255,470	254,533
2.05% Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value	51,902	58,785
Fair Value	53,106	57,952
2.40% Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value	12,155
Fair Value	$12,626

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments - Carrying Value and Fair Value of Long-Term Debt (Parenthetical) (Detail)	Dec. 31, 2014	Dec. 31, 2013
2.05% Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage of aggregate principal amount of outstanding	2.05%	2.05%
2.40% Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage of aggregate principal amount of outstanding	2.40%

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments - Additional Information (Detail) (5.375% Fixed Rate Bonds [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
5.375% Fixed Rate Bonds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amount of fixed rate debt	$250	$250
Interest rate on debt	5.38%	5.38%

Financial_Derivatives_and_Hedg2

Financial Derivatives and Hedging Activities - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Designated as Hedging [Member]
Derivative [Line Items]
Production costs expected to be incurred maximum period	12 months
Maximum maturity period of foreign currency derivative contracts designated as hedging instruments	12 months
Not Designated as Hedging [Member]
Derivative [Line Items]
Maturities of foreign currency derivative contracts not designated as hedging instruments	1 month
Fair Value, Measurements [Member]
Derivative [Line Items]
Accumulated other comprehensive income realization period	12 months

Financial_Derivatives_and_Hedg3

Financial Derivatives and Hedging Activities - Outstanding Derivatives Used to Hedge Foreign Exchange Risks (Detail)

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

In Thousands, unless otherwise specified

Cash Flow Hedges [Member]

Cash Flow Hedges [Member]

Cash Flow Hedges [Member]

Cash Flow Hedges [Member]

Cash Flow Hedges [Member]

Cash Flow Hedges [Member]

Cash Flow Hedges [Member]

Foreign Currency Hedges [Member]

Foreign Currency Hedges [Member]

Foreign Currency Hedges [Member]

Foreign Currency Hedges [Member]

Foreign Currency Hedges [Member]

Foreign Currency Hedges [Member]

Foreign Currency Hedges [Member]

Foreign Currency Hedges [Member]

Foreign Currency Hedges [Member]

Foreign Currency Hedges [Member]

Designated as Hedging [Member]

Designated as Hedging [Member]

Designated as Hedging [Member]

Designated as Hedging [Member]

Designated as Hedging [Member]

Designated as Hedging [Member]

Designated as Hedging [Member]

Not Designated as Hedging [Member]

Not Designated as Hedging [Member]

Not Designated as Hedging [Member]

Not Designated as Hedging [Member]

Not Designated as Hedging [Member]

Not Designated as Hedging [Member]

Not Designated as Hedging [Member]

Not Designated as Hedging [Member]

Not Designated as Hedging [Member]

Not Designated as Hedging [Member]

Euro / U.S. Dollar [Member]

Euro / U.S. Dollar [Member]

U.S. Dollar / Canadian Dollar [Member]

U.S. Dollar / Canadian Dollar [Member]

Euro / Philippine Peso [Member]

British Pound / Philippine Peso [Member]

Euro / British Pound [Member]

Euro / U.S. Dollar [Member]

Euro / British Pound [Member]

Euro / British Pound [Member]

Euro / British Pound [Member]

Euro / British Pound [Member]

U.S. Dollar / British Pound [Member]

U.S. Dollar / British Pound [Member]

Canadian Dollar / U.S Dollar [Member]

U.S Dollar / Euro [Member]

U.S Dollar / Euro [Member]

USD ($)

USD ($)

CAD

CAD

PHP

PHP

GBP (£)

EUR (€)

EUR (€)

GBP (£)

EUR (€)

GBP (£)

USD ($)

USD ($)

CAD

EUR (€)

USD ($)

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Sell (Buy) Notional

($32,527)

($27,105)

-10,036

-13,077

-523,313

-260,535

£ 4,592

€ 9,000

€ 2,000

£ (3,000)

€ 5,000

£ (8,000)

$9,000

$6,000

2,000

€ 4,000

$2,000

Financial_Derivatives_and_Hedg4

Financial Derivatives and Hedging Activities - Fair Values of Derivative Instruments (Detail) (Forward Foreign Currency Exchange Contracts [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Designated as Hedging [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	$3,106
Designated as Hedging [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	394	1,163
Not Designated as Hedging [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	70	36
Not Designated as Hedging [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	$161	$46

Financial_Derivatives_and_Hedg5

Financial Derivatives and Hedging Activities - Income or Loss from Derivative Instruments Recognized in Results of Operations (Detail) (USD $)	3 Months Ended						12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments, gain (loss)	($487)	($115)	($194)	($154)	($3,969)	($1,761)
Forward Foreign Currency Exchange Contracts [Member] | Costs of Products Sold [Member] | Designated as Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective portion of derivative instruments, gain (loss)							-655	-945	2,183
Forward Foreign Currency Exchange Contracts [Member] | Other - Net [Member] | Designated as Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Ineffective portion of derivative instruments, gain (loss)							184	38	311
Forward Foreign Currency Exchange Contracts [Member] | Other - Net [Member] | Not Designated as Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments, gain (loss)							$1,599	($455)	($696)

Financial_Derivatives_and_Hedg6

Financial Derivatives and Hedging Activities - Fair Value Amounts Recorded as Component of Accumulated Other Comprehensive Income (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Balance at January 1,	($1,296)	($599)
Deferred (losses) gains on cash flow hedges	3,923	-1,642
Reclassified to earnings	655	945
Balance at December 31,	$3,282	($1,296)

Shareholders_Equity_Summary_of

Shareholders' Equity - Summary of Outstanding Shares of Common Stock (Detail)	8 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Shares outstanding at beginning of year		43,130,000	42,784,000	42,650,000
Shares repurchased	-755,310	-464,190		-374,000
Treasury shares issued for:
Restricted stock awards		162,000	86,000	76,000
401(k) plan		116,000	123,000	152,000
Employee stock options exercised		110,000	137,000	280,000
Shares outstanding at end of year	43,054,000	43,054,000	43,130,000	42,784,000

Share_Repurchases_Additional_I

Share Repurchases - Additional Information (Detail) (USD $)	8 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2012	1-May-14
Equity [Abstract]
Authorized a share repurchase under a stock repurchase plan	$50,000,000	$50,000,000		$25,000,000
Share repurchase program expiration date		1-May-16
Repurchases, shares	755,310	464,190	374,000
Repurchases, amount	$16,627,000	$12,200,000

Share_Repurchases_Summary_of_S

Share Repurchases - Summary of Share Repurchases under Stock Repurchase Plan (Detail) (USD $)	8 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2012	1-May-14
Equity [Abstract]
Authorized, shares	0	0
Authorized, amount	$50,000,000	$50,000,000		$25,000,000
Repurchases, shares	755,310	464,190	374,000
Repurchases, amount	-16,627,000	-12,200,000
Remaining authorization, shares	0	0
Remaining authorization, amount	$33,373,000	$33,373,000

Commitments_Contingencies_and_2

Commitments, Contingencies and Legal Proceedings - Summary of Minimum Annual Payment Due on Noncancelable Operating Lease (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Leases [Member]
Operating Leased Assets [Line Items]
2015	$6,244
2016	3,742
2017	2,256
2018	1,392
2019	394
Thereafter	1
Other [Member]
Operating Leased Assets [Line Items]
2015	71,402
2016	23,818
2017	1,176
2018	536
2019	$98

Commitments_Contingencies_and_3

Commitments, Contingencies and Legal Proceedings - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended	0 Months Ended	1 Months Ended
	Oct. 14, 2014	Dec. 31, 2014	Sep. 25, 2014	Jan. 31, 2008
		Operable_Unit
Commitments Contingencies And Litigation [Line Items]
Annual payments due under operating leases		$14,000,000
Aggregate contractual obligation		97,000,000
Number of operable units		5
Upper end estimate of total past and future response costs	1,100,000,000
Uncertainty premium for future response costs	100,000,000
Initial minimum amount of NRD assessment		176,000,000
Initial maximum amount of NRD assessment		333,000,000
Revised minimum amount of NRD assessment		287,000,000
Revised maximum amount of NRD assessment		423,000,000
Reserve for environmental liability, expected compensation payments	45,900,000
Environmental loss contingencies recovered	105,000,000	16,300,000
Other prepaid loss contingencies for earlier settlements	59,000,000
Cost of response incurred by government		4,280,000
Reserve for Environmental liabilities, current portion		1,100,000
Maximum estimated percentage of discharge		27.00%
Maximum estimated cost related to Fox River matter		185,000,000
Maximum [Member]
Commitments Contingencies And Litigation [Line Items]
Period over which estimated cost to be incurred		3 years
Minimum [Member]
Commitments Contingencies And Litigation [Line Items]
Period over which estimated cost to be incurred		2 years
OU1 [Member]
Commitments Contingencies And Litigation [Line Items]
Estimated future cost of work yet to be done	100,000,000
OU2-5 [Member]
Commitments Contingencies And Litigation [Line Items]
Estimated future cost of work yet to be done	500,000,000
Annual estimated cost rate seek by Government		70,000,000
NCR costs and damages percentage			100.00%
OU2-5 [Member] | Whiting Litigation [Member]
Commitments Contingencies And Litigation [Line Items]
NCR costs and damages percentage				100.00%
Dredging Season [Member]
Commitments Contingencies And Litigation [Line Items]
Annual estimated cost rate seek by Government		$90,000,000

Segment_and_Geographic_Informa2

Segment and Geographic Information - Schedule of Financial and Other Information by Business Unit (Detail) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$436,261,000	$465,092,000	$445,341,000	$455,721,000	$434,811,000	$456,648,000	$425,967,000	$405,189,000	$1,802,415,000	$1,722,615,000	$1,577,788,000
Energy and related sales, net									7,927,000	3,153,000	7,000,000
Total revenue									1,810,342,000	1,725,768,000	1,584,788,000
Cost of products sold									1,575,188,000	1,507,108,000	1,371,139,000
Gross profit	58,164,000	80,513,000	41,437,000	55,040,000	54,406,000	66,039,000	40,840,000	57,375,000	235,154,000	218,660,000	213,649,000
SG&A									133,235,000	133,867,000	121,590,000
Gains on dispositions of plant, equipment and timberlands, net									-4,861,000	-1,726,000	-9,815,000
Total operating income (loss)									106,780,000	86,519,000	101,874,000
Non-operating expense									-19,397,000	-17,318,000	-22,933,000
Income (loss) before income taxes									87,383,000	69,201,000	78,941,000
Supplementary Data
Plant, equipment and timberlands, net	697,608,000				723,340,000				697,608,000	723,340,000	621,200,000
Depreciation, depletion and amortization									70,555,000	68,196,000	69,500,000
Capital expenditures									66,000,000	103,000,000	58,800,000
Composite Fibers [Member]
Segment Reporting Information [Line Items]
Net sales									617,851,000	566,360,000	436,740,000
Total revenue									617,900,000	566,400,000	436,700,000
Cost of products sold									498,000,000	456,500,000	362,600,000
Gross profit									119,900,000	109,800,000	74,200,000
SG&A									51,600,000	47,400,000	38,100,000
Total operating income (loss)									68,300,000	62,400,000	36,100,000
Income (loss) before income taxes									68,300,000	62,400,000	36,100,000
Supplementary Data
Plant, equipment and timberlands, net	277,800,000				300,000,000				277,800,000	300,000,000	200,100,000
Depreciation, depletion and amortization									29,700,000	24,800,000	23,500,000
Capital expenditures									23,900,000	56,900,000	31,400,000
Advanced Airlaid Materials [Member]
Segment Reporting Information [Line Items]
Net sales									281,673,000	268,396,000	246,282,000
Total revenue									281,700,000	268,400,000	246,300,000
Cost of products sold									247,600,000	238,000,000	218,700,000
Gross profit									34,100,000	30,400,000	27,600,000
SG&A									8,800,000	8,900,000	9,600,000
Total operating income (loss)									25,300,000	21,500,000	18,000,000
Income (loss) before income taxes									25,300,000	21,500,000	18,000,000
Supplementary Data
Plant, equipment and timberlands, net	163,600,000				175,100,000				163,600,000	175,100,000	172,900,000
Depreciation, depletion and amortization									9,100,000	8,900,000	8,700,000
Capital expenditures									7,600,000	6,700,000	3,900,000
Specialty Papers [Member]
Segment Reporting Information [Line Items]
Net sales									902,891,000	887,859,000	894,777,000
Energy and related sales, net									7,900,000	3,200,000	7,000,000
Total revenue									910,800,000	891,000,000	901,800,000
Cost of products sold									821,800,000	799,300,000	779,500,000
Gross profit									89,000,000	91,700,000	122,300,000
SG&A									50,400,000	52,000,000	55,000,000
Total operating income (loss)									38,600,000	39,700,000	67,300,000
Income (loss) before income taxes									38,600,000	39,700,000	67,300,000
Supplementary Data
Plant, equipment and timberlands, net	250,100,000				242,600,000				250,100,000	242,600,000	247,900,000
Depreciation, depletion and amortization									29,900,000	33,200,000	37,400,000
Capital expenditures									32,100,000	34,300,000	23,100,000
Other and Unallocated [Member]
Segment Reporting Information [Line Items]
Cost of products sold									7,800,000	13,300,000	10,300,000
Gross profit									-7,800,000	-13,300,000	-10,400,000
SG&A									22,400,000	25,500,000	18,900,000
Gains on dispositions of plant, equipment and timberlands, net									-4,900,000	-1,700,000	-9,800,000
Total operating income (loss)									-25,300,000	-37,100,000	-19,500,000
Non-operating expense									-19,400,000	-17,300,000	-22,900,000
Income (loss) before income taxes									-44,700,000	-54,400,000	-42,400,000
Supplementary Data
Plant, equipment and timberlands, net	6,100,000				5,600,000				6,100,000	5,600,000	300,000
Depreciation, depletion and amortization									1,900,000	1,300,000
Capital expenditures									$2,400,000	$5,100,000	$300,000

Segment_and_Geographic_Informa3

Segment and Geographic Information - Schedule of Segment Reporting Information of Revenue by Segment (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$436,261	$465,092	$445,341	$455,721	$434,811	$456,648	$425,967	$405,189	$1,802,415	$1,722,615	$1,577,788
Composite Fibers [Member]
Segment Reporting Information [Line Items]
Net sales									617,851	566,360	436,740
Composite Fibers [Member] | Food & Beverage [Member]
Segment Reporting Information [Line Items]
Net sales									296,304	302,738	265,423
Composite Fibers [Member] | Wall Covering [Member]
Segment Reporting Information [Line Items]
Net sales									149,957	97,698
Composite Fibers [Member] | Metallized [Member]
Segment Reporting Information [Line Items]
Net sales									80,839	83,949	87,720
Composite Fibers [Member] | Composite Laminates [Member]
Segment Reporting Information [Line Items]
Net sales									38,159	39,296	44,613
Composite Fibers [Member] | Technical Specialties and Other [Member]
Segment Reporting Information [Line Items]
Net sales									52,592	42,679	38,984
Advanced Airlaid Materials [Member]
Segment Reporting Information [Line Items]
Net sales									281,673	268,396	246,282
Advanced Airlaid Materials [Member] | Feminine Hygiene [Member]
Segment Reporting Information [Line Items]
Net sales									216,836	219,222	197,792
Advanced Airlaid Materials [Member] | Wipes [Member]
Segment Reporting Information [Line Items]
Net sales									16,002	15,186	13,562
Advanced Airlaid Materials [Member] | Home Care [Member]
Segment Reporting Information [Line Items]
Net sales									15,401	14,857	14,527
Advanced Airlaid Materials [Member] | Adult Incontinence [Member]
Segment Reporting Information [Line Items]
Net sales									17,586	5,046	6,959
Advanced Airlaid Materials [Member] | Other [Member]
Segment Reporting Information [Line Items]
Net sales									15,848	14,085	13,442
Specialty Papers [Member]
Segment Reporting Information [Line Items]
Net sales									902,891	887,859	894,777
Specialty Papers [Member] | Other [Member]
Segment Reporting Information [Line Items]
Net sales									3,805	4,346	3,397
Specialty Papers [Member] | Carbonless & Forms [Member]
Segment Reporting Information [Line Items]
Net sales									376,959	369,618	372,950
Specialty Papers [Member] | Engineered Products [Member]
Segment Reporting Information [Line Items]
Net sales									194,189	184,913	187,724
Specialty Papers [Member] | Envelope & Converting [Member]
Segment Reporting Information [Line Items]
Net sales									183,194	175,928	174,781
Specialty Papers [Member] | Book Publishing [Member]
Segment Reporting Information [Line Items]
Net sales									$144,744	$153,054	$155,925

Segment_and_Geographic_Informa4

Segment and Geographic Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Customer	Customer	Customer
Segment Reporting, Revenue Reconciling Item [Line Items]
Number of customers accounting for percentage of net sales	0	0	0
Customers accounted for certain percentage in net sales	10.00%	10.00%	10.00%
Advanced Airlaid Materials [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Number of customers accounting for percentage of net sales	1	1	1

Segment_and_Geographic_Informa5

Segment and Geographic Information - Schedule of Net Sales to External Customers and Location of Net Plant, Equipment and Timberlands (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$436,261	$465,092	$445,341	$455,721	$434,811	$456,648	$425,967	$405,189	$1,802,415	$1,722,615	$1,577,788
Plant, Equipment and Timberlands - Net	697,608				723,340				697,608	723,340	621,200
Operating Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,802,415	1,722,615	1,577,788
Plant, Equipment and Timberlands - Net	697,608				723,340				697,608	723,340	621,186
Operating Segments [Member] | United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									980,933	968,833	952,195
Plant, Equipment and Timberlands - Net	256,251				248,306				256,251	248,306	248,185
Operating Segments [Member] | Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									529,003	483,859	358,442
Plant, Equipment and Timberlands - Net	257,311				287,880				257,311	287,880	191,559
Operating Segments [Member] | United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									103,219	107,082	119,092
Plant, Equipment and Timberlands - Net	62,617				63,650				62,617	63,650	59,131
Operating Segments [Member] | Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									129,401	113,414	106,702
Plant, Equipment and Timberlands - Net	82,774				83,033				82,774	83,033	83,796
Operating Segments [Member] | Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									59,859	49,427	41,357
Plant, Equipment and Timberlands - Net	$38,655				$40,471				$38,655	$40,471	$38,515

Condensed_Consolidating_Financ2

Condensed Consolidating Financial Statements - Additional Information (Detail)	Dec. 31, 2014	Oct. 03, 2012
PHG Tea Leaves, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Percentage owned in domestic subsidiaries	100.00%
Mollanvick, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Percentage owned in domestic subsidiaries	100.00%
Glatfelter Holdings, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Percentage owned in domestic subsidiaries	100.00%
5.375% Notes [Member]
Schedule of Equity Method Investments [Line Items]
Interest rate on notes guaranteed	5.38%	5.38%

Condensed_Consolidating_Financ3

Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Income (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Income Statements, Captions [Line Items]
Net sales	$436,261	$465,092	$445,341	$455,721	$434,811	$456,648	$425,967	$405,189	$1,802,415	$1,722,615	$1,577,788
Energy and related sales, net									7,927	3,153	7,000
Total revenues									1,810,342	1,725,768	1,584,788
Costs of products sold									1,575,188	1,507,108	1,371,139
Gross profit	58,164	80,513	41,437	55,040	54,406	66,039	40,840	57,375	235,154	218,660	213,649
Selling, general and administrative expenses									133,235	133,867	121,590
Gains on dispositions of plant, equipment and timberlands, net									-4,861	-1,726	-9,815
Operating income (loss)									106,780	86,519	101,874
Other non-operating income (expense)
Interest expense									-18,921	-17,965	-18,694
Interest income									159	310	460
Equity in earnings of subsidiaries										0
Other, net									-635	337	-4,699
Total other expense									-19,397	-17,318	-22,933
Income (loss) before income taxes									87,383	69,201	78,941
Income tax (benefit) provision									18,137	2,043	19,562
Net income (loss)									69,246	67,158	59,379
Other comprehensive income (loss)									-79,513	88,609	2,775
Comprehensive income (loss)									-10,267	155,767	62,154
Adjustments/ Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									-35	-16	-25
Total revenues									-35	-16	-25
Costs of products sold									-35	-24	-7
Gross profit										8	-18
Selling, general and administrative expenses										0
Operating income (loss)										8	-18
Other non-operating income (expense)
Interest expense									102,755	8,990	7,565
Interest income									-102,756	-8,991	-7,565
Equity in earnings of subsidiaries									-31,402	-106,950	-74,636
Other, net										0
Total other expense									-31,403	-106,951	-74,636
Income (loss) before income taxes									-31,403	-106,943	-74,654
Income tax (benefit) provision										4
Net income (loss)									-31,403	-106,947	-74,654
Other comprehensive income (loss)									11,684	-11,106	-7,163
Comprehensive income (loss)									-19,539	-118,053	-81,817
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									902,892	887,859	894,777
Energy and related sales, net									7,927	3,153	7,000
Total revenues									910,819	891,012	901,777
Costs of products sold									829,336	812,298	789,589
Gross profit									81,483	78,714	112,188
Selling, general and administrative expenses									67,086	69,614	73,877
Gains on dispositions of plant, equipment and timberlands, net									-3,545	-1,390	-9,790
Operating income (loss)									17,942	10,490	48,101
Other non-operating income (expense)
Interest expense									-19,105	-18,891	-22,311
Interest income									638	627	452
Equity in earnings of subsidiaries									66,628	58,412	40,682
Other, net									-1,366	-1,569	-6,459
Total other expense									46,795	38,579	12,364
Income (loss) before income taxes									64,737	49,069	60,465
Income tax (benefit) provision									-4,509	-18,089	1,086
Net income (loss)									69,246	67,158	59,379
Other comprehensive income (loss)									-79,513	88,609	2,775
Comprehensive income (loss)									-10,267	155,767	62,154
Guarantors [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									35	16	14
Total revenues									35	16	14
Costs of products sold									34	15	13
Gross profit									1	1	1
Selling, general and administrative expenses									492	718	169
Gains on dispositions of plant, equipment and timberlands, net									-1,316	-319
Operating income (loss)									825	-398	-168
Other non-operating income (expense)
Interest expense											-57
Interest income									102,241	8,662	7,191
Equity in earnings of subsidiaries									-35,226	48,538	33,954
Other, net									314	104	477
Total other expense									67,329	57,304	41,565
Income (loss) before income taxes									68,154	56,906	41,397
Income tax (benefit) provision									3,060	453	1,587
Net income (loss)									65,094	56,453	39,810
Other comprehensive income (loss)									-40,704	6,883	3,243
Comprehensive income (loss)									24,390	63,336	43,053
Non Guarantors [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									899,523	834,756	683,022
Total revenues									899,523	834,756	683,022
Costs of products sold									745,853	694,819	581,544
Gross profit									153,670	139,937	101,478
Selling, general and administrative expenses									65,657	63,535	47,544
Gains on dispositions of plant, equipment and timberlands, net										-17	-25
Operating income (loss)									88,013	76,419	53,959
Other non-operating income (expense)
Interest expense									-102,571	-8,064	-3,891
Interest income									36	12	382
Equity in earnings of subsidiaries										0
Other, net									417	1,802	1,283
Total other expense									-102,118	-6,250	-2,226
Income (loss) before income taxes									-14,105	70,169	51,733
Income tax (benefit) provision									19,586	19,675	16,889
Net income (loss)									-33,691	50,494	34,844
Other comprehensive income (loss)									28,840	4,223	3,920
Comprehensive income (loss)									($4,851)	$54,717	$38,764

Condensed_Consolidating_Financ4

Condensed Consolidating Financial Statements - Condensed Consolidating Balance Sheet (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Assets
Cash and cash equivalents	$99,837	$122,882	$97,679	$38,277
Other current assets	474,785	463,700
Plant, equipment and timberlands, net	697,608	723,340	621,200
Other assets	289,274	368,488
Total assets	1,561,504	1,678,410
Liabilities and Shareholders' Equity
Current liabilities	279,731	288,367
Long-term debt	398,878	442,325
Deferred income taxes	104,016	141,020
Other long-term liabilities	129,770	122,222
Total liabilities	912,395	993,934
Shareholders' equity	649,109	684,476	539,679	490,404
Total liabilities and shareholders' equity	1,561,504	1,678,410
Adjustments/ Eliminations [Member]
Assets
Other current assets	-427,777	-326,045
Investments in subsidiaries	-1,224,411	-1,272,221
Other assets	-17,980	-15,873
Total assets	-1,670,168	-1,614,139
Liabilities and Shareholders' Equity
Current liabilities	-435,062	-337,878
Long-term debt	-572,579	-320,795
Deferred income taxes	-12,289	-8,319
Other long-term liabilities	5,779	3,409
Total liabilities	-1,014,151	-663,583
Shareholders' equity	-656,017	-950,556
Total liabilities and shareholders' equity	-1,670,168	-1,614,139
Parent Company [Member]
Assets
Cash and cash equivalents	42,208	56,216	43,781	3,063
Other current assets	218,544	208,814
Plant, equipment and timberlands, net	255,255	247,243
Investments in subsidiaries	824,480	803,688
Other assets	121,125	170,060
Total assets	1,461,612	1,486,021
Liabilities and Shareholders' Equity
Current liabilities	403,662	375,535
Long-term debt	250,000	250,000
Deferred income taxes	46,483	70,989
Other long-term liabilities	112,358	105,021
Total liabilities	812,503	801,545
Shareholders' equity	649,109	684,476
Total liabilities and shareholders' equity	1,461,612	1,486,021
Guarantors [Member]
Assets
Cash and cash equivalents	514	501	4,278	2,838
Other current assets	420,451	327,152
Plant, equipment and timberlands, net	991	1,054
Investments in subsidiaries	399,931	468,533
Total assets	821,887	797,240
Liabilities and Shareholders' Equity
Current liabilities	3,394	2,855
Deferred income taxes	-453	-283
Total liabilities	2,941	2,572
Shareholders' equity	818,946	794,668
Total liabilities and shareholders' equity	821,887	797,240
Non Guarantors [Member]
Assets
Cash and cash equivalents	57,115	66,165	49,620	32,376
Other current assets	263,567	253,779
Plant, equipment and timberlands, net	441,362	475,043
Other assets	186,129	214,301
Total assets	948,173	1,009,288
Liabilities and Shareholders' Equity
Current liabilities	307,737	247,855
Long-term debt	721,457	513,120
Deferred income taxes	70,275	78,633
Other long-term liabilities	11,633	13,792
Total liabilities	1,111,102	853,400
Shareholders' equity	-162,929	155,888
Total liabilities and shareholders' equity	$948,173	$1,009,288

Condensed_Consolidating_Financ5

Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Cash Flows (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	$99,577	$173,635	$112,846
Investing activities
Expenditures for purchases of plant, equipment and timberlands	-66,046	-103,047	-58,752
Proceeds from disposals of plant, equipment and timberlands, net	5,072	1,947	10,272
Acquisitions, net of cash acquired	-8,015	-210,911
Other	-600	-425	-225
Net cash used by investing activities	-69,589	-312,436	-48,705
Financing activities
Net (repayments of) proceeds from indebtedness	-18,128	182,230	17,869
Payments of note offering costs		-419	-4,748
Payment of dividends to shareholders	-18,696	-16,965	-15,608
Repurchases of common stock	-12,180		-5,675
Payments related to share-based compensation awards and other	-1,877	-1,671	2,673
Net cash (used) provided by financing activities	-50,881	163,175	-5,489
Effect of exchange rate on cash	-2,152	829	750
Net (decrease) increase in cash and cash equivalents	-23,045	25,203	59,402
Cash and cash equivalents at the beginning of period	122,882	97,679	38,277
Cash and cash equivalents at the end of period	99,837	122,882	97,679
Net (decrease) increase in cash and cash equivalents	-23,045	25,203	59,402
Adjustments/ Eliminations [Member]
Investing activities
Repayments from intercompany loans	-20,840	-18,223	-35,431
Advances of intercompany loans	39,011	27,216	34,980
Intercompany capital contributed		91
Net cash used by investing activities	18,171	9,084	-451
Financing activities
Repayments of intercompany loans	20,840	18,223	35,431
Borrowings of intercompany loans	-39,011	-27,216	-34,980
Intercompany capital received		-91
Net cash (used) provided by financing activities	-18,171	-9,084	451
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	36,240	55,507	25,787
Investing activities
Expenditures for purchases of plant, equipment and timberlands	-34,518	-39,496	-23,463
Proceeds from disposals of plant, equipment and timberlands, net	3,707	1,435	10,236
Repayments from intercompany loans			6,088
Advances of intercompany loans	-12,671		-91
Other	-600	-425	-225
Net cash used by investing activities	-44,082	-38,486	-7,455
Financing activities
Net (repayments of) proceeds from indebtedness			17,869
Payments of note offering costs		-160	-4,748
Payment of dividends to shareholders	-18,696	-16,965	-15,608
Repurchases of common stock	-12,180		-5,675
Repayments of intercompany loans		-1,100
Borrowings of intercompany loans	26,340	15,310	27,875
Payments related to share-based compensation awards and other	-1,630	-1,671	2,673
Net cash (used) provided by financing activities	-6,166	-4,586	22,386
Net (decrease) increase in cash and cash equivalents			40,718
Cash and cash equivalents at the beginning of period	56,216	43,781	3,063
Cash and cash equivalents at the end of period	42,208	56,216	43,781
Net (decrease) increase in cash and cash equivalents			40,718
Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	4,158	4,974	5,958
Investing activities
Proceeds from disposals of plant, equipment and timberlands, net	1,355	333
Repayments from intercompany loans	20,840	18,223	29,343
Advances of intercompany loans	-26,340	-27,216	-34,375
Intercompany capital contributed		-91
Net cash used by investing activities	-4,145	-8,751	-5,032
Financing activities
Borrowings of intercompany loans			514
Net cash (used) provided by financing activities			514
Net (decrease) increase in cash and cash equivalents			1,440
Cash and cash equivalents at the beginning of period	501	4,278	2,838
Cash and cash equivalents at the end of period	514	501	4,278
Net (decrease) increase in cash and cash equivalents			1,440
Non Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided (used) by Operating activities	59,179	113,154	81,101
Investing activities
Expenditures for purchases of plant, equipment and timberlands	-31,528	-63,551	-35,289
Proceeds from disposals of plant, equipment and timberlands, net	10	179	36
Advances of intercompany loans			-514
Acquisitions, net of cash acquired	-8,015	-210,911
Net cash used by investing activities	-39,533	-274,283	-35,767
Financing activities
Net (repayments of) proceeds from indebtedness	-18,128	182,230
Payments of note offering costs		-259
Repayments of intercompany loans	-20,840	-17,123	-35,431
Borrowings of intercompany loans	12,671	11,906	6,591
Intercompany capital received		91
Payments related to share-based compensation awards and other	-247
Net cash (used) provided by financing activities	-26,544	176,845	-28,840
Effect of exchange rate on cash	-2,152	829	750
Net (decrease) increase in cash and cash equivalents			17,244
Cash and cash equivalents at the beginning of period	66,165	49,620	32,376
Cash and cash equivalents at the end of period	57,115	66,165	49,620
Net (decrease) increase in cash and cash equivalents			$17,244

Quarterly_Results_Schedule_of_

Quarterly Results - Schedule of Net Income (Loss) and Earnings (Loss) Per Share (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Selected Quarterly Financial Information [Abstract]
Net sales	$436,261	$465,092	$445,341	$455,721	$434,811	$456,648	$425,967	$405,189	$1,802,415	$1,722,615	$1,577,788
Gross profit	58,164	80,513	41,437	55,040	54,406	66,039	40,840	57,375	235,154	218,660	213,649
Net Income	$19,557	$30,372	$4,669	$14,648	$16,477	$34,119	$933	$15,629
Diluted earnings per share	$0.45	$0.69	$0.11	$0.33	$0.37	$0.77	$0.02	$0.36	$1.57	$1.52	$1.36

Quarterly_Results_Impact_of_Ce

Quarterly Results - Impact of Certain Factors on Income (Loss) and Earning (Loss) Per Share (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013
Quarterly Financial Data [Abstract]
Asset Impairment Charge		($2,356)
Restructuring Costs & Workforce Efficiency	-373				-60	-117	-193	-260
Alternative Fuel Mixture/Cellulosic Biofuel Credits	81	1,032			450	9,866
Gains on Sale of Plant Equipment and Timberlands	612	1,004	872	507	1,301	142		282
Acquisition Integration Costs	($487)	($115)			($194)	($154)	($3,969)	($1,761)

Schedule_II_Valuation_and_Qual

Schedule II - Valuation and Qualifying Accounts (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of year	$2,725	$2,858	$2,861
Provision	1,061	945	71
Write-offs, recoveries and discounts allowed	-946	-1,119	-91
Other	-137	41	17
Balance, end of year	2,703	2,725	2,858
Allowance for Sales Discounts and Deductions [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of year	1,810	2,302	2,831
Provision	4,356	5,526	3,661
Write-offs, recoveries and discounts allowed	-4,719	-6,148	-4,173
Other	362	130	-17
Balance, end of year	$1,809	$1,810	$2,302