Clearwater Paper (CLW) 10-K 26 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Feb. 20, 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	CLW
Entity Registrant Name	CLEARWATER PAPER CORP
Entity Central Index Key	1441236
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		19,119,472
Entity Public Float			$1,211,986,752

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	0 Months Ended		3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014		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			$472,318	$511,142	$498,759	$484,920	$470,159	$487,845	$471,002	$460,824	$1,967,139	[1]	$1,889,830	[1]	$1,874,304	[1]
Costs and expenses:
Cost of sales			-413,643	-434,457	-434,111	-426,629	-401,404	-441,237	-414,521	-414,209	-1,708,840		-1,671,371		-1,607,872
Selling, general and administrative expenses			-33,206	-31,817	-31,565	-33,514	-30,466	-27,766	-26,767	-34,132	-130,102		-119,131		-121,045
Loss on divested assets	-40,159	[2]	-40,159	0	0	0	0	0	0	0	-40,159		0		0
Impairment of assets			-3,078	-890	0	-4,259	0	0	0	0	-8,227		0		0
Total operating costs and expenses			-490,086	-467,164	-465,676	-464,402	-431,870	-469,003	-441,288	-448,341	-1,887,328		-1,790,502		-1,728,917
Income from operations			-17,768	43,978	33,083	20,518	38,289	18,842	29,714	12,483	79,811		99,328		145,387
Interest expense, net											-39,150		-44,036		-33,796
Debt retirement costs											-24,420		-17,058		0
Earnings before income taxes											16,241		38,234		111,591
Income tax (provision) benefit											-18,556		68,721		-47,460
Net (loss) earnings			($27,247)	$6,253	$12,453	$6,226	$82,862	$13,317	$11,658	($882)	($2,315)		$106,955		$64,131
Net earnings per common share:
Basic (in dollars per share)			($1.39)	$0.32	$0.61	$0.30	$3.91	$0.60	$0.52	($0.04)	($0.11)		$4.84		$2.75
Diluted (in dollars per share)			($1.39)	$0.31	$0.61	$0.29	$3.87	$0.60	$0.52	($0.04)	($0.11)		$4.80		$2.72
[1]	1 In 2013 and 2012, pulp not utilized internally was sold by the Pulp and Paperboard segment to external customers resulting in net sales of $5.8 million and $9.0 million respectively. Commencing in 2014, the majority of excess pulp is sold by the Consumer Products segment and totaled $2.1 million.
[2]	2 These costs relate to the sale of our Consumer Products segment’s specialty business and mills. For additional discussion, see Note 4, “Divested Assets”

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Net earnings	($2,315)		$106,955		$64,131
Defined benefit pension and other postretirement employee benefits:
Net (loss) gain arising during the period, net of tax of $(15,103), $32,346, and $(6,359)	-23,523		51,262		-9,780
Curtailments, net of tax of $ - , $298, and $188	0		471		289
Prior service credit (cost) arising during the period, net of tax of $3,278, $(1,976), and $2,079	5,106		-3,130		3,199
Amortization of actuarial loss included in net periodic cost, net of tax of $3,836, $5,742, and $4,761	5,975		9,098		7,324
Amortization of prior service credit included in net periodic cost, net of tax of $(772), $(64), and $(806)	1,202		101		1,240
(Amortization) recognition of deferred taxes related to actuarial gain on other postretirement employee benefit obligations	0		0		-220
Foreign currency translation amounts reclassified from accumulated other comprehensive loss	874		0		0
Other comprehensive (loss) income, net of tax	-12,770	[1]	57,600	[1]	-428
Comprehensive income	($15,085)		$164,555		$63,703
[1]	2For the year ended December 31, 2014, net periodic costs associated with our pension and other postretirement employee benefit, or OPEB, plans included in other comprehensive loss and reclassified from accumulated other comprehensive loss, or AOCL, included $38.6 million of net loss on plan assets, $9.8 million of actuarial loss amortization, $8.4 million of prior service credit arising during the period and $2.0 million of prior service credit amortization, less total tax of $8.8 million. For the year ended December 31, 2013, net periodic costs associated with our pension and OPEB plans included in other comprehensive income and reclassified from AOCL included $83.6 million of net gain on plan assets, $14.8 million of actuarial loss amortization, $5.1 million of prior service costs arising during the period, $0.2 million of prior service credit amortization and $0.8 million of curtailments, less total tax of $36.3 million. These accumulated other comprehensive loss components are included in the computation of net periodic pension and OPEB costs in Note 13, “Savings, Pension and Other Postretirement Employee Benefit Plans.”

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net (loss) gain arising during the period, tax benefit (provision)	$15,103	($32,346)	($6,359)
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, Tax	0	298	188
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit), Tax	3,278	-1,976	-2,079
Amortization of actuarial loss included in net periodic cost, tax expense	-3,836	-5,742	4,761
Amortization of prior service credit included in net periodic cost, tax benefit	($772)	($64)	($806)

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash	$27,331	$23,675
Restricted cash	1,500	1,500
Short-term investments	50,000	70,000
Receivables, net	133,914	158,874
Taxes receivable	1,255	10,503
Inventories	286,626	267,788
Deferred tax assets	21,760	37,538
Prepaid expenses	4,191	5,523
Total current assets	526,577	575,401
Property, plant and equipment, net	810,987	884,698
Goodwill	209,087	229,533
Intangible assets, net	24,956	40,778
Pension assets	4,738	4,488
Other assets, net	9,583	9,927
TOTAL ASSETS	1,585,928	1,744,825
Current liabilities:
Accounts payable and accrued liabilities	215,826	190,648
Current liability for pensions and other postretirement employee benefits	7,915	8,778
Total current liabilities	223,741	199,426
Long-term debt	575,000	650,000
Liability for pensions and other postretirement employee benefits	118,464	109,807
Other long-term obligations	56,856	52,942
Accrued taxes	2,696	2,658
Deferred tax liabilities	111,634	124,898
Stockholders' equity:
Preferred stock, par value $0.0001 per share, 5,000,000 authorized shares, no shares issued	0	0
Common stock, par value $0.0001 per share, 100,000,000 authorized shares-24,056,057 and 24,007,581 shares issued	2	2
Additional paid-in capital	334,074	326,546
Retained earnings	464,324	466,639
Treasury stock, at cost, common shares–4,498,388 and 2,923,640 shares repurchased	-230,000	-130,000
Accumulated other comprehensive loss, net of tax	-70,863	-58,093
Total stockholders’ equity	497,537	605,094
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$1,585,928	$1,744,825

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Preferred Stock, Par or Stated Value Per Share	$0.00	$0.00
Preferred stock, authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Common Stock, Par or Stated Value Per Share	$0.00	$0.00
Common stock, authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	24,056,057	24,007,581
Treasury stock, shares (in shares)	4,498,388	2,923,640

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	($2,315)	$106,955	$64,131
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	90,145	90,272	79,333
Equity-based compensation expense	12,790	10,960	9,703
Impairment of assets	8,227	0	0
Deferred tax provision	13,813	5,629	12,870
Employee benefit plans	2,115	10,131	9,366
Deferred issuance costs and discounts on long-term debt	6,141	4,964	2,010
Loss on divestiture of assets	29,059	0	0
Disposal of plant and equipment, net	959	1,493	2,003
Non-cash adjustments to unrecognized taxes	38	-75,308	3,275
Changes in working capital, net	-12,248	-15,022	61,281
Change in taxes receivable, net	9,248	10,325	-10,828
Excess tax benefits from equity-based payment arrangements	-864	0	-15,837
Change in non-current accrued taxes, net	290	569	960
Funding of qualified pension plans	-16,955	-15,050	-20,627
Other, net	-1,343	439	1,053
Net cash flows from operating activities	139,100	136,357	198,693
CASH FLOWS FROM INVESTING ACTIVITIES
Change in short-term investments, net	20,000	-50,000	35,001
Additions to plant and equipment	-93,028	-90,593	-203,776
Proceeds from divested assets	107,740	0	0
Proceeds from sale of assets	975	0	1,035
Cash paid for acquisitions, net of cash acquired	0	0	-9,264
Net cash flows from investing activities	35,687	-140,593	-177,004
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from long-term debt	300,000	275,000	0
Repayment of long-term debt	-375,000	-150,000	0
Purchase of treasury stock	-100,000	-100,000	-18,650
Payments for long-term debt issuance costs	-3,002	-4,837	-2
Payment of tax withholdings on equity-based payment arrangements	-1,523	-4,831	-13,234
Excess tax benefits from equity-based payment arrangements	864	0	15,837
Other, net	7,530	0	-1,500
Net cash flows from financing activities	-171,131	15,332	-17,549
Increase in cash	3,656	11,096	4,140
Cash at beginning of period	23,675	12,579	8,439
Cash at end of period	27,331	23,675	12,579
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for interest, net of amounts capitalized	34,418	36,147	30,086
Cash paid for income taxes	6,851	3,256	18,719
Cash received from income tax refunds	11,867	1,577	2,220
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING ACTIVITIES:
Changes in accrued plant and equipment	6,187	-4,085	3,339
Property acquired under capital lease	$385	$0	$0

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive (Loss) Income
In Thousands, unless otherwise specified
Beginning Balance at Dec. 31, 2011	$484,904	$2	$315,964	$295,553	($11,350)	($115,265)
Shares, Outstanding at Dec. 31, 2011		23,102			-333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	64,131			64,131
Performance share and restricted stock unit awards (in shares)		739
Performance share and restricted stock unit awards	10,937		10,937
Pension and OPEB, net of tax of $8,761 in 2014, $36,346 in 2013 and $(137) in 2012	-208					-208
Amortization of deferred taxes related to actuarial gain on other postretirement employee benefit obligations	-220					-220
Foreign currency translation amounts reclassified from accumulated other comprehensive loss	0
Purchase of treasury stock (in shares)					-520
Purchase of treasury stock	-18,650				-18,650
Ending Balance at Dec. 31, 2012	540,894	2	326,901	359,684	-30,000	-115,693
Shares, Outstanding at Dec. 31, 2012		23,841			-853
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	106,955			106,955
Performance share and restricted stock unit awards (in shares)		167
Performance share and restricted stock unit awards	-355		-355
Pension and OPEB, net of tax of $8,761 in 2014, $36,346 in 2013 and $(137) in 2012	57,600					57,600
Amortization of deferred taxes related to actuarial gain on other postretirement employee benefit obligations	0
Foreign currency translation amounts reclassified from accumulated other comprehensive loss	0
Purchase of treasury stock (in shares)					-2,071
Purchase of treasury stock	-100,000				-100,000
Ending Balance at Dec. 31, 2013	605,094	2	326,546	466,639	-130,000	-58,093
Shares, Outstanding at Dec. 31, 2013		24,008			-2,924
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	-2,315			-2,315
Performance share and restricted stock unit awards (in shares)		48
Performance share and restricted stock unit awards	7,528		7,528			0
Pension and OPEB, net of tax of $8,761 in 2014, $36,346 in 2013 and $(137) in 2012	13,644	0			0	-13,644
Amortization of deferred taxes related to actuarial gain on other postretirement employee benefit obligations	0
Foreign currency translation amounts reclassified from accumulated other comprehensive loss	874	0	0	0	0	-874
Purchase of treasury stock (in shares)					-1,574
Purchase of treasury stock	-100,000	0			-100,000
Ending Balance at Dec. 31, 2014	$497,537	$2	$334,074	$464,324	($230,000)	($70,863)
Shares, Outstanding at Dec. 31, 2014		24,056			-4,498

Consolidated_Statements_of_Sto1

Consolidated Statements of Stockholders' Equity Consolidate Statements of Stockholders' Equity (Parenthetical) (Accumulated Other Comprehensive (Loss) Income, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive (Loss) Income
Pension and OPEB, Tax	($8,761)	$36,346	($137)

Nature_of_Operations_and_Basis

Nature of Operations and Basis of Presentation	12 Months Ended
	Dec. 31, 2014
Disclosure Nature Of Operations And Basis Of Presentation Additional Information [Abstract]
Nature of Operations and Basis of Presentation	Nature of Operations and Basis of Presentation
	Clearwater Paper manufactures quality consumer tissue, away-from-home tissue, parent roll tissue, bleached paperboard and pulp at manufacturing facilities across the nation. The company is a premier supplier of private label tissue to major retailers and wholesale distributors, including grocery, drug, mass merchants and discount stores. In addition, the company produces bleached paperboard used by quality-conscious printers and packaging converters. Clearwater Paper's employees build shareholder value by developing strong customer partnerships through quality and service.
	Unless the context otherwise requires or unless otherwise indicated, references in this report to “Clearwater Paper Corporation,” “we,” “our,” “the company” and “us” refer to Clearwater Paper Corporation and its subsidiaries.
	On December 28, 2012, we acquired the assets of a wood chipping facility located in Clarkston, Washington, near our Lewiston, Idaho facility, in an effort to bolster our wood fiber position and obtain cost savings. The total consideration associated with the acquisition was approximately $11 million, which included $1.5 million of contingent consideration paid in cash by the company based on certain performance and indemnity guarantees. We allocated the purchase price to the tangible and amortizable intangible assets acquired based on their estimated fair values at the date of acquisition, resulting in the recognition of approximately $6 million in equipment, $4 million in intangible assets for customer relationships and a $1 million intangible asset for a non-compete agreement with the former owners. No goodwill was recorded.
	On March 6, 2013, we announced the planned permanent closure of our Thomaston, Georgia converting and distribution facility. The shutdown occurred gradually as converting lines were relocated and installed at our other facilities, with all operations at Thomaston having ceased as of the end of 2013. We incurred $7.2 million of costs associated with the closure, of which $1.3 million was incurred in 2014.
	On February 17, 2014, we announced the permanent and immediate closure of our Long Island, New York, tissue converting and distribution facility. In 2014, we incurred $18.8 million of costs associated with the closure.
	On December 30, 2014, we sold our specialty business and mills to a private buyer for $108 million in cash, net of sale related expenses and adjustments. The specialty business and mills' production consisted predominantly of machine-glazed tissue and also included parent rolls and other specialty tissue products such as absorbent materials and dark-hued napkins. The sale included five of our former subsidiaries with facilities located at East Hartford, Connecticut; Menominee, Michigan; Gouverneur, New York; St. Catharines, Ontario; and Wiggins, Mississippi.
	These consolidated financial statements include the financial condition and results of operations of Clearwater Paper Corporation and its wholly-owned subsidiaries. All intercompany transactions and balances between operations within the company have been eliminated.

Summary_of_Significant_Accouti

Summary of Significant Accouting Policies	12 Months Ended
	Dec. 31, 2014
Significant Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies
	SIGNIFICANT ESTIMATES
	The preparation of financial statements in conformity with accounting principles generally accepted in the U.S., which we refer to in this report as GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of net sales and expenses during the reporting period. Significant areas requiring the use of estimates and measurement of uncertainty include determination of net realizable value for deferred tax assets, uncertain income tax positions, assessment of impairment of long-lived assets and goodwill, assessment of environmental matters, allocation of purchase price and fair value estimates for business combinations, equity-based compensation and pension and postretirement obligation assumptions. Actual results could differ from those estimates and assumptions.
	SHORT-TERM INVESTMENTS AND RESTRICTED CASH
	Our short-term investments are invested primarily in demand deposits, which have very short maturity periods, and therefore earn an interest rate commensurate with low-risk instruments. We do not attempt to hedge our exposure to interest rate risk for our short-term investments. Our restricted cash in which the underlying instrument has a term of greater than twelve months from the balance sheet date is classified as non-current and is included in “Other assets, net” on our Consolidated Balance Sheet. As of December 31, 2014, we had $1.5 million of restricted cash classified as current and $2.3 million of restricted cash classified as non-current on our Consolidated Balance Sheet. As of December 31, 2013, substantially all restricted cash balances were classified as current and included in "Restricted cash" on our Consolidated Balance Sheet.
	TRADE ACCOUNTS RECEIVABLE
	Trade accounts receivable are stated at the amount we expect to collect. Trade accounts receivable do not bear interest. The allowance for doubtful accounts is our best estimate of the losses we expect will result from the inability of our customers to make required payments. We generally determine the allowance based on a combination of actual historical write-off experience and an analysis of specific customer accounts. As of December 31, 2014 and 2013, we had allowances for doubtful accounts of $1.4 million and $1.9 million, respectively, which decreased primarily as a result of the sale of our specialty business and mills. Bad debt expense, net, charged to selling, general and administrative expenses during 2014, 2013 and 2012 was $0.1 million, $1.5 million and $0.2 million, respectively. All other activity impacting the allowance for doubtful accounts was immaterial for all periods.
	PROPERTY, PLANT AND EQUIPMENT
	Property, plant and equipment are stated at cost, including assets acquired under capital lease obligations and any interest costs capitalized, less accumulated depreciation. Depreciation of buildings, equipment and other depreciable assets is determined using the straight-line method. Estimated useful lives generally range from 10 to 40 years for land improvements; 10 to 40 years for buildings and improvements; 5 to 25 years for machinery and equipment; and 2 to 15 years for office and other equipment. Assets we acquire through business combinations have estimated lives that are typically shorter than the assets we construct or buy new.
	We review the carrying value of our property, plant and equipment for impairment when events or changes in circumstances indicate that the carrying amount of those assets may not be recoverable. An impairment of property, plant and equipment exists when the carrying value is not considered to be recoverable through future undiscounted cash flows from operations and the carrying value of the assets exceeds the estimated fair value. During the first quarter of 2014, we permanently closed our Consumer Products segment's Long Island converting and distribution facility. As a result of this closure, we impaired certain plant and equipment. In addition, as a result of the December 30, 2014 sale of our specialty business and mills, certain property, plant and equipment associated with the divested mills were written off and included in our loss on divested assets. See Note 4, "Asset Divestiture" and Note 6, "Property, Plant and Equipment" for further discussion.
	INTANGIBLE ASSETS
	We use estimates in determining and assigning the fair value of the useful lives of intangible assets, the amount and timing of related future cash flows and fair values of the related operations. Our intangible assets have definite lives and are amortized over their estimated useful lives. We assess our intangible assets for impairment annually and when events or changes in circumstances indicate that the carrying amount may not be recoverable.
	We recorded intangible assets as a result of our acquisition of Cellu Tissue Holdings, Inc., or Cellu Tissue, on December 27, 2010. We also recorded intangible assets as a result of our December 2012 acquisition of a wood chipping facility. During the first quarter of 2014, we permanently closed our Consumer Products segment's Long Island converting and distribution facility. As a result of this closure, we impaired certain intangible assets. In addition, during the fourth quarter of 2014 we determined that a customer relationship intangible asset related to our Pulp and Paperboard segment's wood chipping facility was fully impaired. Also, as a result of the December 30, 2014, sale of our specialty business and mills, certain intangible assets associated with the divested mills were written off and included in our loss on divested assets. See Note 4, "Asset Divestiture" and Note 7, "Goodwill and Intangible Assets" for further discussion.
	GOODWILL
	Goodwill from an acquisition represents the excess of the cost of a business acquired over the net of the amounts assigned to assets acquired, including identifiable intangible assets and liabilities assumed. We use estimates in determining and assigning the fair value of goodwill, including the amount and timing of related future cash flows and fair values of the related operations. Goodwill is not amortized but is tested for impairment annually as of November 1, as well as any time when events suggest impairment may have occurred. In the event the carrying value of the reporting unit in which our goodwill is assigned exceeds the estimated fair value of that reporting unit, an impairment loss would be recognized to the extent the carrying amount of the reporting unit exceeds its implied fair value.
	As a result of our acquisition of Cellu Tissue in December 2010, we recorded $229.5 million of goodwill as included on our Consolidated Balance Sheet as of December 31, 2013. All of the recorded goodwill was assigned to our Consumer Products segment and reporting unit. As a result of the December 30, 2014, sale of our specialty business and mills, a certain portion of goodwill was allocated to the divested mills and included in our loss on divested assets, see Note 4, "Asset Divestiture" and Note 7, "Goodwill and Intangible Assets" for further discussion. As of December 31, 2014, we had $209.1 million of goodwill included on our Consolidated Balance Sheet.
	PENSION AND OTHER POSTRETIREMENT EMPLOYEE BENEFITS
	The determination of pension plan expense and the requirements for funding our pension plans are based on a number of actuarial assumptions. Three critical assumptions are the discount rate applied to pension plan obligations, the rate of return on plan assets and mortality rates. For other postretirement employee benefit, or OPEB, plans, which provide certain health care and life insurance benefits to qualified retired employees, critical assumptions in determining OPEB expense are the discount rate applied to benefit obligations, the assumed health care cost trend rates used in the calculation of benefit obligations and mortality rates. We also participate in multiemployer defined benefit pension plans. We make contributions to these multiemployer plans, as well as make contributions to a trust fund established to provide retiree medical benefits for a portion of these employees.
	The discount rate used in the determination of pension benefit obligations and pension expense is determined based on a review of long-term high-grade bonds and management's expectations. To determine the expected long-term rate of return on pension assets, we employ a process that analyzes historical long-term returns for various investment categories, as measured by appropriate indices. These indices are weighted based upon the extent to which plan assets are invested in the particular categories in arriving at our determination of a composite expected return.
	An increase in the discount rate or the rate of expected return on plan assets, all other assumptions remaining the same, would decrease pension plan expense, and conversely, a decrease in either of these measures would increase plan expense. The actual rates of return on plan assets may vary significantly from the assumptions used because of unanticipated changes in financial markets.
	The estimated net loss and prior service cost (credit) for the defined benefit pension and OPEB plans is amortized from accumulated other comprehensive loss into net periodic cost (benefit) in accordance with current accounting guidance.
	Periodic pension and OPEB expenses are included in “Cost of sales” and “Selling, general and administrative expenses” in the Consolidated Statements of Operations. The expense is allocated to all business segments. In accordance with current accounting guidance governing defined benefit pension and other postretirement plans, at December 31, 2014 and 2013, long-term assets are recorded for overfunded single-employer plans and liabilities are recorded for underfunded single-employer plans. The funded status of a benefit plan is measured as the difference between plan assets at fair value and the projected benefit obligation. For underfunded single-employer plans, the estimated liability to be payable in the next twelve months is recorded as a current liability, with the remaining portion recorded as a long-term liability.
	INCOME TAXES
	Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the consolidated financial statement carrying amounts of existing assets and liabilities and their respective tax basis and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.
	The determination of our provision for income taxes requires significant judgment, the use of estimates, and the interpretation and application of complex tax laws. Significant judgment is required in assessing the timing and amounts of deductible and taxable items and the probability of sustaining uncertain tax positions. The benefits of uncertain tax positions are recorded in our consolidated financial statements only after determining a more-likely-than-not probability that the uncertain tax positions will withstand challenge, if any, from tax authorities. When facts and circumstances change, we reassess these probabilities and record any changes in the consolidated financial statements as appropriate.
	REVENUE RECOGNITION
	We recognize net sales when there is persuasive evidence of a sales agreement, the price to the customer is fixed and determinable, collection is reasonably assured, and title and the risk of loss passes to the customer. Shipping terms generally indicate when title and the risk of loss have passed. Revenue is recognized at shipment for sales when shipping terms are free on board, or FOB, shipping point. For sales where shipping terms are FOB destination, revenue is recognized when the goods are received by the customer. Revenue from both domestic and foreign sales of our products can involve shipping terms of either FOB shipping point or FOB destination or other shipping terms, depending upon the sales agreement with the customer.
	We did not have any single customer that accounted for 10% or more of our total net sales in either 2014 or 2012. In 2013, we had one customer in the Consumer Products segment, the Kroger Company, that accounted for approximately $204 million, or 10.8%, of our total company net sales.
	We provide for trade promotions, customer cash discounts, customer returns and other deductions as reductions to net sales in the same period as the related revenues are recognized. Provisions for these items are determined based on historical experience or specific customer arrangements.
	Revenue is recognized net of any sales taxes collected. Sales taxes, when collected, are recorded as a current liability and remitted to the appropriate governmental entities.
	ENVIRONMENTAL
	As part of our corporate policy, we have an ongoing process to monitor, report on and comply with environmental requirements. Based on this ongoing process, accruals for environmental liabilities that are not within the scope of specific authoritative guidance related to accounting for asset retirement obligations or conditional asset retirement obligations are established in accordance with guidance related to accounting for contingencies. We estimate our environmental liabilities based on various assumptions and judgments, the specific nature of which varies in light of the particular facts and circumstances surrounding each environmental liability. These estimates typically reflect assumptions and judgments as to the probable nature, magnitude and timing of required investigation, remediation and monitoring activities and the probable cost of these activities. Currently, we are not aware of any material environmental liabilities and have accrued only for specific costs related to environmental matters that we have determined are probable and for which an amount can be reasonably estimated. Fees for professional services associated with environmental and legal issues are expensed as incurred.
	STOCKHOLDERS’ EQUITY
	On December 15, 2014, we announced that our Board of Directors had approved a new stock repurchase program authorizing the repurchase of up to $100 million of our common stock. The repurchase program authorizes purchases of our common stock from time to time through open market purchases, negotiated transactions or other means, including accelerated stock repurchases and 10b5-1 trading plans in accordance with applicable securities laws and other restrictions. We have no obligation to repurchase stock under this program and may suspend or terminate the program at any time.
	On February 5, 2014, we announced that our Board of Directors had approved a stock repurchase program authorizing the repurchase of up to $100 million of our common stock. We completed this program during the third quarter of 2014. In total, we repurchased 1,574,748 shares of our outstanding common stock at an average price of $63.50 per share under this program.
	On January 17, 2013, we announced that our Board of Directors had approved a stock repurchase program authorizing the repurchase of up to $100 million of our common stock, which was completed in 2013. Under this program, we repurchased 1,039,513 shares of our outstanding common stock under an accelerated stock buyback agreement with a major financial institution at an average repurchase price of $48.10 per share. We also made repurchases of 1,030,657 shares of our outstanding common stock on the open market at a total cost of $50 million, representing an an average price of $48.51 per share, under this program.
	DERIVATIVES
	We had no activity during the years ended December 31, 2014, 2013 and 2012 that required hedge or derivative accounting treatment. However, to partially mitigate our exposure to market risk for changes in utility commodity pricing, we use firm price contracts to supply a portion of the natural gas requirements for our manufacturing facilities. As of December 31, 2014, these contracts covered approximately 57% of the expected average monthly requirements for 2015, including approximately 67% of the expected average monthly requirements for the first quarter. For the years ended December 31, 2014, 2013 and 2012, approximately 58%, 16% and 29%, respectively, of our natural gas volumes were supplied through firm price contracts. These contracts qualify for treatment as “normal purchases or normal sales” under authoritative guidance and thus require no mark-to-market adjustment.

Recently_Adopted_and_New_Accou

Recently Adopted and New Accounting Standards	12 Months Ended
	Dec. 31, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently Adopted and Prospective Accounting Standards	Recently Adopted and Prospective Accounting Standards
	In May 2014, the Financial Accounting Standards Board, or FASB, issued Accounting Standard Update, or ASU, 2014-09, Revenue from Contracts with Customers. The core principle of the new standard is for companies to recognize revenue in a manner that depicts the transfer of goods or services to customers in amounts that reflect the consideration, or payment, to which the company expects to be entitled in exchange for those goods or services. The standard will also result in enhanced disclosures about revenue, provide guidance for transactions that were not previously addressed comprehensively, such as service revenue and contract modifications, and clarify guidance for multiple-element arrangements. This standard is effective for fiscal years and interim periods within those years beginning after December 15, 2016, with early adoption prohibited. The standard may be applied under either a retrospective or cumulative effect adoption method. We are currently evaluating the impact this guidance will have on our consolidated financial statements.
	In April 2014, the FASB issued ASU 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which amends and raises the threshold of a disposal transaction that qualifies as a discontinued operation, as well as requires additional disclosures about discontinued operations and disposals of individually significant components that do not qualify as discontinued operations. This standard is effective prospectively for all disposals of components that occur within annual periods beginning on or after December 15, 2014, and interim periods within those years, with early adoption permitted. We adopted this guidance in 2014; see Note 4, "Asset Divestiture."
	In July 2013, the FASB issued ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists, which provides guidance on financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. This ASU only changes existing presentation requirements but does not require new recurring disclosures and is prospective for annual and interim reporting periods beginning after December 15, 2013. This guidance did not impact our consolidated financial statements.
	We reviewed all other new accounting pronouncements issued in the period and concluded that they are not applicable to our business.

Asset_Divestiture

Asset Divestiture	12 Months Ended
	Dec. 31, 2014
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]
Asset Divestiture [Text Block]	Asset Divestiture
	Specialty Business and Mills Divestiture
	On December 30, 2014, we simultaneously announced and completed the sale of our specialty business and mills, which includes our former Menominee, Michigan; St. Catharines, Ontario; East Hartford, Connecticut; Gouverneur, New York; and Wiggins, Mississippi manufacturing, converting and distribution sites from our Consumer Products reporting segment for net proceeds of approximately $108 million. We assessed the sale of our specialty business and mills under the relevant authoritative accounting guidance related to discontinued operations reporting and concluded that this divestiture of assets does not qualify for discontinued operations reporting as the divestiture does not constitute a disposal of a component of our Consumer Products reporting segment. Furthermore, we concluded during our assessment that the sale of our specialty business and mills does not represent either a strategic shift in the Consumer Products segment, nor does it represent a major impact on our operations and financial results. Rather, consistent with our long-term corporate strategy, the sale of the specialty business and mills is intended to sharpen our Consumer Products segment's focus on its core retail businesses by investing net proceeds from the sale into capital projects within our Consumer Products segment.
	In total, $40.2 million was recorded as "Loss on divested assets" and included as a component of operating income within our Consolidated Statement of Operations, as well as a component of our Consumer Products segment's operating income as disclosed in Note 18, “Segment Information.” Among other charges, the loss on divested assets included a $20.4 million write-off of goodwill, which was originally recorded in connection with the Cellu Tissue acquisition and was allocated to the sale of the specialty business and mills. Consistent with authoritative guidance, the goodwill was allocated to our divested assets by estimating the fair value of the specialty business compared to the estimated fair value of the Consumer Products reporting unit, which was then used to estimate the percentage of goodwill to allocate to the sale of this business. In addition, "Loss on divested assets" within our Consolidated Statement of Operations included a $4.9 million intangible asset write-off related to certain identifiable customer relationship and trade name and trademark intangibles associated with the divested mills. Both the goodwill and intangible asset charges are discussed further in Note 7, “Goodwill and Intangible Assets."
	In total, $105.7 million of assets were sold, consisting primarily of $86.7 million of property, plant and equipment and $18.0 million of inventory. As part of the sales transaction, we also agreed to certain brokerage and service arrangements totaling approximately $6.0 million to be recognized over the next five years. Furthermore, as a result of this sale we have recorded restricted cash balances totaling $3.8 million on our December 31, 2014 Consolidated Balance Sheet, which include contingencies related to certain indemnity and working capital guarantees.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventories	Inventories
	(In thousands)	December 31, 2014		December 31, 2013
	Pulp, paperboard and tissue products	$	188,760	$	182,715
	Materials and supplies	74,916		69,836
	Logs, pulpwood, chips and sawdust	22,950		15,237
		$	286,626	$	267,788
	At December 31, 2014, our inventories are stated at the lower of market or current average cost using the average cost method.

Property_Plant_and_Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant and Equipment
	(In thousands)	December 31, 2014			December 31, 2013
	Machinery and equipment	$	1,830,245		$	1,937,914
	Buildings and improvements	311,468			304,971
	Land improvements	46,652			54,277
	Office and other equipment	21,832			11,951
	Land	7,221			11,827
	Construction in progress	43,668			40,204
		$	2,261,086		$	2,361,144
	Less accumulated depreciation and amortization	(1,450,099		)	(1,476,446		)
		$	810,987		$	884,698
	The December 31, 2014 and 2013 buildings and improvements and machinery and equipment combined balances include $24.6 million and $24.1 million, respectively, associated with capital leases.
	Depreciation expense, including amounts associated with capital leases, totaled $83.6 million, $83.3 million and $74.6 million in 2014, 2013 and 2012, respectively. We did not capitalize any interest during 2014 and 2013. For 2012 we capitalized $12.6 million of interest expense associated with our TAD tissue expansion project, which included the construction of our new tissue manufacturing and converting facilities in Shelby, North Carolina, and upgrades to our tissue manufacturing facility in Las Vegas, Nevada.
	Consistent with authoritative guidance, we assess the carrying amount of long-lived assets with definite lives that are held-for-use and evaluate them for recoverability whenever events or changes in circumstances indicate that we may be unable to recover the carrying amount of the assets. During the first quarter of 2014, we permanently closed our Long Island converting and distribution facility. As a result of this closure, we considered an outside third party's appraisal in assessing the recoverability of the facility's long-lived plant and equipment based on available market data for comparable assets sold through private party transactions. Based on this assessment, we determined the carrying amounts of certain long-lived plant and equipment related to the Long Island facility exceeded their fair value. As a result, we recorded $3.8 million of non-cash impairment charges to our accompanying Consolidated Statement of Operations in the year ended December 31, 2014. In addition, on December 30, 2014 we completed the sale of our specialty business and mills, which included $86.7 million of net property, plant and equipment. This event did not impact the recoverability of our remaining long-lived assets. For additional discussion regarding the sale of our specialty business and mills, see Note 4, "Asset Divestiture." There were no other such events or changes in circumstances that impacted our remaining long-lived assets.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets
	The carrying amount of goodwill is reviewed at least annually for impairment as of November 1. The first step of the goodwill impairment test, used to identify potential impairment, compares the fair value of a reporting unit with its carrying amount, including goodwill. If the carrying amount of a reporting unit is greater than zero and its estimated fair value exceeds its carrying amount, goodwill of the reporting unit is not considered impaired. For the purpose of goodwill impairment testing, we identify two reporting units, Consumer Products and Pulp and Paperboard, the same as our two reportable operating segments (see Note 18, "Segment Information"). All of the recorded goodwill is assigned to our Consumer Products reporting unit.
	As of November 1, 2014 and 2013, we performed calculations of both a discounted cash flow and market-based valuation model for our Consumer Products reporting unit. The assumptions used in these models allowed us to evaluate the estimated fair value of our reporting unit. The determination of these assumptions required significant estimates on our part. Due to the inherent uncertainty involved in making such estimates, actual results could differ from those assumptions. However, we evaluated the merits of each significant assumption, both individually and in the aggregate, used to determine the estimated fair value of our reporting unit for reasonableness. Upon completion of this exercise, we concluded that the estimated fair value of the Consumer Products reporting unit exceeded its carrying amount. We determined that no further testing was necessary and did not record any impairment loss on our goodwill for the years ended December 31, 2014 and 2013.
	On December 30, 2014, we simultaneously announced and completed the sale of our Consumer Products reporting unit's specialty business and mills. We considered the sale to be highly probable during our annual goodwill review and as such included its impact in estimating the fair value of the Consumer Products reporting unit, concluding that this event did not require additional impairment testing. However, consistent with authoritative guidance we allocated a portion of our goodwill to the specialty business and mills sold. As a result, we recorded a $20.4 million write-off of goodwill, which was originally recorded in connection with the Cellu Tissue acquisition and was allocated to the sale of the specialty mills business. In addition, certain of our customer relationships and trade name and trademarks intangible assets were associated with our divested specialty business and mills, and as a result we recorded a $4.9 million write-off of these assets. These charges are included in "Loss on divested assets" within our accompanying Consolidated Statement of Operations. For additional discussion regarding the sale of our specialty business and mills, see Note 4, "Asset Divestiture."
	Intangible asset amounts represent the acquisition date fair values of identifiable intangible assets acquired. The fair values of the intangible assets were determined by using the income approach, discounting projected future cash flows based on management’s expectations of the current and future operating environment. The rates used to discount projected future cash flows reflected a weighted average cost of capital based on our industry, capital structure and risk premiums including those reflected in the current market capitalization. Definite-lived intangible assets are amortized over their useful lives, which have historically ranged from 2.5 to 10 years. Authoritative guidance requires that the carrying amount of a long-lived asset with a definite life that is held-for-use be evaluated for recoverability whenever events or changes in circumstances indicate that the entity may be unable to recover the asset’s carrying amount.
	During the first quarter of 2014, we permanently closed our Consumer Products segment's Long Island converting and distribution facility. As a result of this closure, we performed an assessment of the recoverability of our intangible assets associated with this facility. It was determined that the carrying amounts of certain trade names and trademarks related to the Long Island facility were exceeding their fair value. As a result, we recorded a $1.3 million non-cash impairment charge in our accompanying Consolidated Statement of Operations. Fully amortized non-compete agreements related to the Long Island facility were also disposed during the facility closure.
	During the fourth quarter of 2014, we evaluated the recoverability of our remaining intangible assets under the income approach and noted that a customer relationship intangible asset relating to our Pulp and Paperboard segment's wood chipping facility was fully impaired. As a result, we recorded an additional non-cash impairment charge of $3.1 million in our accompanying Consolidated Statement of Operations.
	During 2013, we permanently closed our Thomaston converting and distribution facility and finalized this closure in 2014. This closure did not require an assessment of recoverability on our assets as all converting lines were relocated and installed at our other facilities. There were no other such events or changes in circumstances that required us to assess whether our definite-lived intangible assets were impaired for the years ended December 31, 2014 and 2013. We do not have any indefinite-lived intangible assets recorded from acquisitions.
	Intangible assets at the balance sheet dates are comprised of the following:
			31-Dec-14
	(Dollars in thousands, lives in years)		Useful	Historical		Accumulated			Net
			Life	Cost		Amortization			Balance
	Customer relationships		9	$	41,001	$	(18,223	)	$	22,778
	Trade names and trademarks		10	3,286		(1,314		)	1,972
	Non-compete agreements		5	1,189		(983		)	206
	Total intangible assets			$	45,476	$	(20,520	)	$	24,956
			December 31, 2013
	(Dollars in thousands, lives in years)		Useful	Historical		Accumulated			Net
			Life	Cost		Amortization			Balance
	Customer relationships		9	$	53,957	$	(17,234	)	$	36,723
	Trade names and trademarks		10	5,300		(1,590		)	3,710
	Non-compete agreements		2.5 - 5.0	1,674		(1,329		)	345
	Total intangible assets			$	60,931	$	(20,153	)	$	40,778
	As of December 31, 2014, estimated future amortization expense related to intangible assets is as follows (in thousands):
	Years ending December 31,	Amount
	2015	$	4,967
	2016	4,946
	2017	4,946
	2018	4,884
	2019	4,884
	Thereafter	329
	Total	$	24,956

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	Earnings (loss) before income taxes is comprised of the following amounts in each tax jurisdiction:
	(In thousands)	2014			2013			2012
	United States	$	16,253		$	38,900		$	111,278
	Canada	(12		)	(666		)	313
	Earnings before income taxes	$	16,241		$	38,234		$	111,591
	The income tax provision (benefit) is comprised of the following:
	(In thousands)	2014			2013			2012
	Current
	Federal	$	2,355		$	(75,119	)	$	27,724
	State	1,872			506			6,637
	Foreign	516			263			229
		4,743			(74,350		)	34,590
	Deferred
	Federal	11,432			10,177			16,243
	State	2,381			(4,423		)	(3,180		)
	Foreign	—			(125		)	(193		)
		13,813			5,629			12,870
	Income tax provision (benefit)	$	18,556		$	(68,721	)	$	47,460
	The income tax provision or benefit differs from the amount computed by applying the statutory federal income tax rate of 35.0% to earnings before income taxes due to the following:
	(In thousands)	2014			2013			2012
	Computed expected tax provision	$	5,685		$	13,381		$	39,063
	State and local taxes, net of federal income tax impact	1,543			1,279			4,398
	Adjustment for state deferred tax rate	1,546			(762		)	(742		)
	State investment tax credits	(1,039		)	(2,263		)	(9,077		)
	Federal credits and net operating losses	(485		)	(10,234		)	4,121
	Federal manufacturing deduction	(674		)	—			(3,288		)
	Uncertain tax positions	355			(69,144		)	4,801
	Loss on divested assets	10,554			—			—
	State attribute true up	(2,874		)	—			—
	New York state attribute true up	1,654			—			—
	Change in valuation allowances	2,346			(1,334		)	6,932
	U.S. tax provision on foreign operations	—			67			(33		)
	Other, net	(55		)	289			1,285
	Income tax provision (benefit)	$	18,556		$	(68,721	)	$	47,460
	Effective tax rate	114.3		%	(179.7		)%	42.5		%
	As a result of the sale of our specialty business and mills, which included our Canadian subsidiary, we recognized a gain due to a basis difference of approximately $12.5 million for which no deferred liability had been previously recognized based upon our assertion to permanently reinvest in foreign operations. Additionally, as a result of the divestiture, there was a write-off of goodwill of approximately $20.4 million for which there was no tax basis. These items were offset by foreign tax credits generated through the sale.
	During the year ended December 31, 2014, we recorded discrete expense for a reduction in our blended state tax rate as well as adjustments to New York state specific deferred items. These changes were due to amendments we made to our New York state return filings as a result of changes in New York state tax laws. In reviewing the changes in the tax laws, we identified that, in prior years, we had not applied the proper apportionment factor when certain New York state net operating loss carryforwards were generated, which resulted in a $2.9 million overstatement. We corrected this in the second quarter of 2014 by including the overstatement as a discrete item within state rate adjustments due to immateriality.
	We have tax benefits relating to equity-based compensation that are being utilized to reduce our U.S. taxable income. As of December 31, 2014 and December 31, 2013, we had a total amount of excess tax benefits that were not recognized on our Consolidated Balance Sheet of approximately $2.8 million and $2.3 million, respectively, that will be credited to additional paid-in capital when cash tax benefits are realized according to our “with-and-without” or “incremental” accounting policy method.
	The tax effects of significant temporary differences creating deferred tax assets and liabilities at December 31 were:
	(In thousands)	2014			2013
	Deferred tax assets:
	Employee benefits	$	8,270		$	8,612
	Postretirement employee benefits	40,940			41,515
	Incentive compensation	9,354			8,937
	Inventories	6,716			5,898
	Pensions	7,238			152
	Federal and state credit carryforwards	23,759			27,597
	Net operating losses	3,192			13,930
	Other	9,384			7,390
	Total deferred tax assets	$	108,853		$	114,031
	Valuation allowance	(15,969		)	(13,622		)
	Deferred tax assets, net of valuation allowance	$	92,884		$	100,409
	Deferred tax liabilities:
	Plant and equipment	$	(178,531	)	$	(178,227	)
	Intangible assets	(4,227		)	(9,542		)
	Total deferred tax liabilities	(182,758		)	(187,769		)
	Net deferred tax liabilities	$	(89,874	)	$	(87,360	)
	Net deferred tax assets and liabilities consist of:
	(In thousands)	2014			2013
	Current deferred tax assets	$	21,760		$	37,538
	Current deferred tax liabilities	—			—
	Net current deferred tax assets	21,760			37,538
	Non-current deferred tax assets	71,124			62,871
Non-current deferred tax liabilities	(182,758		)	(187,769		)
Net non-current deferred tax liabilities	(111,634		)	(124,898		)
Net deferred tax liabilities	$	(89,874	)	$	(87,360	)
In the years ended December 31, 2014, 2013 and 2012, we recorded an expense of $1.5 million, and benefits of $0.7 million and $0.7 million, respectively, reflecting a remeasurement of state deferred tax assets and liabilities using anticipated tax rates that will be in effect when the underlying assets and liabilities will reverse.
As of December 31, 2014, we had deferred tax assets arising from deductible temporary differences, tax losses and tax credits of approximately $108.9 million before the offset of certain deferred tax liabilities. With the exception of certain deferred tax assets related to federal foreign tax credits, state tax losses and state tax credits totaling $16.0 million, management believes it is more likely than not that forecasted income, together with the tax effect of the deferred tax liabilities, will be sufficient to fully recover the remaining deferred tax assets.
During 2014, the valuation allowance for deferred tax assets increased by $2.4 million. We decreased the valuation allowances for state tax losses $0.6 million and increased the valuation allowances for state tax credits by $1.9 million. We also increased the valuation allowance relating to foreign tax credits by $1.1 million. These three items were recorded as a deferred tax expense to the income tax provision.
During 2013, the valuation allowance for deferred tax assets decreased by a net $1.3 million. We decreased the valuation allowances for state tax losses incurred by $1.2 million and decreased the valuation allowances for state tax credits by $0.4 million. Both of these items were recorded as current period deferred tax benefit. We also increased the valuation allowance relating to foreign tax credits by $0.3 million, which was recorded as a deferred tax expense to the income tax provision.
During the fourth quarter of 2012, the Internal Revenue Service, or IRS, commenced an audit of our tax returns for the tax years ending December 31, 2008 through December 31, 2012. The audit was finalized during the third quarter of 2014. As a result, we recognized an additional deferred tax asset of $1.5 million and an associated benefit to the rate.
During the second quarter of 2013, the IRS commenced an audit of our wholly owned subsidiary Cellu Tissue Holdings, Inc, or Cellu Tissue and its subsidiaries for the year ended December 27, 2010; the period immediately before our acquisition of Cellu Tissue. During the first quarter of 2014, we successfully closed the audit of Cellu Tissue.
Tax years subject to examination by major taxing jurisdictions are as follows:
Jurisdiction	Years
United States	2009 - 2014
Canada	2011 - 2014
Arkansas	2011 - 2014
California	2010 - 2014
Georgia	2010 - 2014
Idaho	2011 - 2014
Illinois	2008 - 2014
Wisconsin	2010 - 2014
Tax credits and losses subject to expiration by major taxing jurisdictions are as follows (dollars in thousands):
Jurisdiction	Gross Values			Years
United States
Foreign tax credits	$	5,488		2016 - 2024
Cellulosic biofuel credits	1,903			2015
Other federal tax credits	927			2026 - 2033
Connecticut tax losses	16,358			2018 - 2033
Georgia tax losses	3,829			2027 - 2033
Idaho tax credits	5,262			2014 - 2027
North Carolina tax credits	17,974			2015 - 2017
Oklahoma tax losses	45,805			2030 - 2033
A review of our uncertain income tax positions at December 31, 2014 and 2013 indicates that liabilities are required to be recorded for gross unrecognized tax benefits following authoritative accounting guidance. The following presents a roll forward of our unrecognized tax benefits and associated interest and penalties, as included in the Accrued taxes line item in non-current liabilities in our Consolidated Balance Sheets.
(In thousands)	Gross			Interest			Total Gross
	Unrecognized			and			Unrecognized
	Tax Benefits,			Penalties			Tax Benefits
	Excluding
	Interest and
	Penalties
Balance at January 1, 2013	$	72,004		$	6,695		$	78,699
Decrease in prior year tax positions	(69,816		)	(5,397		)	(75,213		)
Decrease due to settlements	(525		)	(777		)	(1,302		)
Increase in current year tax positions	469			5			474
Balance at December 31, 2013	$	2,132		$	526		$	2,658
Decrease in prior year tax positions	(157		)	(301		)	(458		)
Increase in current year tax positions	431			65			496
Balance at December 31, 2014	$	2,406		$	290		$	2,696
We have operations in many states within the U.S. and are subject, at times, to tax audits in these jurisdictions. These tax audits by their nature are complex and can require multiple years to resolve. The final resolution of any such tax audits could result in either a reduction of our accruals or an increase in our income tax provision, both of which could have an impact on the results of operations in any given period. With a few exceptions, we are no longer subject to U.S. federal, state and local, or foreign income tax examinations by tax authorities for years prior to 2009. We regularly evaluate, assess and adjust these accruals in light of changing facts and circumstances, which could cause the effective tax rate to fluctuate from period to period. Although the timing of resolution of audits is not certain, we evaluate all audit issues in the aggregate, along with the expiration of applicable statutes of limitations, and estimate that it is reasonably possible the total gross unrecognized tax benefits could decrease by approximately $1 million within the next 12 months.
In 2013, we recorded a total reduction to the reserve for uncertain tax positions materially related to tax positions concerning the Alternative Fuel Mixture Tax Credit, or AFMTC. The reduction, net of deferred tax assets associated with this position, totaled $69.1 million. The reduction was the result of a memorandum released by the IRS, which concluded that the AFMTC was not subject to taxation.
Unrecognized tax benefits net of related deferred tax assets at December 31, 2014, if recognized, would favorably impact our effective tax rate by decreasing our tax provision by $2.7 million. We reflect accrued interest related to tax obligations, as well as penalties, in our provision for income taxes. For the years ended December 31, 2014, 2013, and 2012 we accrued interest and no penalties of $0.1 million, $2.0 million and $1.9 million, respectively, in our income tax provision.

Accounts_Payable_and_Accrued_L

Accounts Payable and Accrued Liabilities	12 Months Ended
	Dec. 31, 2014
Accounts Payable and Accrued Liabilities [Abstract]
Accounts Payable and Accrued Liabilities	Accounts Payable and Accrued Liabilities
	(In thousands)	December 31, 2014		December 31, 2013
	Trade accounts payable	$	122,856	$	108,192
	Accrued wages, salaries and employee benefits	41,880		38,563
	Accrued interest	12,173		9,691
	Accrued discounts and allowances	10,026		6,410
	Accrued utilities	6,959		8,309
	Accrued taxes other than income taxes payable	5,622		6,322
	Other	16,310		13,161
		$	215,826	$	190,648

Debt

Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt	Debt
	ISSUANCE OF $300 MILLION SENIOR NOTES DUE 2025 AND REDEMPTION OF $375 MILLION SENIOR NOTES DUE 2018
	On July 29, 2014 we issued $300 million aggregate principal amount of senior notes, which we refer to as the 2014 Notes. The 2014 Notes mature on February 1, 2025, have an interest rate of 5.375% and were issued at their face value. The issuance of these notes generated net proceeds of approximately $298 million after deducting offering expenses. We redeemed all of our $375 million aggregate principal amount of senior notes issued on October 22, 2010, which we refer to as the 2010 Notes, using the net proceeds from the 2014 Notes along with company funds and a $37 million draw from our senior secured revolving credit facility during the third quarter of 2014.
	The 2010 Notes had a maturity date of November 1, 2018, and an interest rate of 7.125%. On August 28, 2014, we redeemed all of the 2010 Notes at a redemption price equal to 100% of the principal amount of $375 million and a “make whole” premium of $17.6 million plus accrued and unpaid interest of $8.7 million, for an aggregate amount of $401.3 million. The make whole premium and a portion of the unpaid interest, as well as a $4.6 million non-cash charge relating to the unamortized deferred issuance costs associated with the 2010 Notes, were recorded as components of "Debt retirement costs" and included in our Consolidated Statement of Operations.
	The 2014 Notes are guaranteed by all of our direct and indirect domestic subsidiaries. The 2014 Notes will also be guaranteed by each of our future direct and indirect domestic subsidiaries that do not constitute an immaterial subsidiary under the indenture governing the 2014 Notes. The 2014 Notes are equal in right of payment with all other existing and future unsecured senior indebtedness and are senior in right of payment to any future subordinated indebtedness. The 2014 Notes are effectively subordinated to all of our existing and future secured indebtedness, including borrowings under our secured revolving credit facility, which is secured by certain of our accounts receivable, inventory and cash. The terms of the 2014 Notes limit our ability and the ability of any restricted subsidiaries to incur certain liens, engage in sale and leaseback transactions and consolidate, merge with, or convey, transfer or lease substantially all of our or their assets to another person.
	We may, on any one or more occasions, redeem all or a part of the 2014 Notes, upon not less than 30 days nor more than 60 days notice, at a redemption price equal to 100% of the principal amount of the 2014 Notes redeemed, plus the applicable premium as of, and accrued and unpaid interest, if any, to the date of redemption. Unless we default in the payment of the redemption price, interest will cease to accrue on the 2014 Notes or portions thereof called for redemption on the applicable redemption date. In addition, we may be required to make an offer to purchase the 2014 Notes upon the sale of certain assets and upon a change of control.
	$275 MILLION SENIOR NOTES DUE 2023
	In June 2009, we issued senior unsecured notes, which we refer to as the 2009 Notes, in the aggregate principal amount of $150 million. The 2009 Notes were due on June 15, 2016 and had an interest rate of 10.625%. The 2009 Notes were issued at a price equal to 98.792% of their face value.
	We had the option to redeem all or a portion of the 2009 Notes at any time prior to June 15, 2013 at a redemption price equal to 100% of the principal amount thereof plus a “make whole” premium and accrued and unpaid interest. On February 22, 2013, we exercised our option to redeem all of the 2009 Notes at a redemption price equal to approximately $166 million, which consisted of 100% of the principal amount, plus a $12.6 million “make whole” premium and accrued and unpaid interest of approximately $3.0 million. The make whole premium and a portion of the unpaid interest, as well as an unamortized discount and deferred issuance costs associated with the 2009 Notes, were recorded as components of "Debt retirement costs" totaling $17.1 million in the first quarter of 2013, as included in the accompanying Consolidated Statement of Operations. Proceeds to fund the redemption of the 2009 Notes were made available through the sale of $275 million aggregate principal amount of senior notes on January 23, 2013, which we refer to as the 2013 Notes. The 2013 Notes mature on February 1, 2023, have an interest rate of 4.5% and were issued at their face value. The issuance of these notes generated net proceeds of approximately $271 million after deducting offering expenses.
	The 2013 Notes are guaranteed by all of our direct and indirect domestic subsidiaries. The 2013 Notes will also be guaranteed by each of our future direct and indirect domestic subsidiaries that we do not designate as an unrestricted subsidiary under the indenture governing the 2013 Notes. The 2013 Notes are equal in right of payment with all other existing and future unsecured senior indebtedness and are senior in right of payment to any future subordinated indebtedness. The 2013 Notes are effectively subordinated to all of our existing and future secured indebtedness, including borrowings under our secured revolving credit facility, which is secured by certain of our accounts receivable, inventory and cash. The terms of the 2013 Notes limit our ability and the ability of any restricted subsidiaries to borrow money; pay dividends; redeem or repurchase capital stock; make investments; sell assets; create restrictions on the payment of dividends or other amounts to us from any restricted subsidiaries; enter into transactions with affiliates; enter into sale and lease back transactions; create liens; and consolidate, merge or sell all or substantially all of our assets.
	Prior to February 1, 2016, we may redeem up to 35% of the 2013 Notes at a redemption price equal to 104.5% of the principal amount plus accrued and unpaid interest with the proceeds from one or more qualified equity offerings. We have the option to redeem all or a portion of the 2013 Notes at any time before February 1, 2018 at a redemption price equal to 100% of the principal amount plus accrued and unpaid interest and a “make whole” premium. On or after February 1, 2018, we may redeem all or a portion of the 2013 Notes at specified redemption prices plus accrued and unpaid interest. In addition, we may be required to make an offer to purchase the 2013 Notes upon the sale of certain assets and upon a change of control.
	REVOLVING CREDIT FACILITY
	On November 26, 2008, we entered into a $125 million senior secured revolving credit facility with certain financial institutions. The amount available to us under the revolving credit facility is based on the lesser of 85% of our eligible accounts receivable plus approximately 65% of our eligible inventory, or $125 million. The revolving credit facility has been subsequently amended and expires on September 30, 2016.
	As of December 31, 2014, there were no borrowings outstanding under the credit facility, but $7.8 million of the credit facility was being used to support outstanding standby letters of credit. Loans under the credit facility bear interest (i) for LIBOR loans, LIBOR plus between 1.75% and 2.25% and (ii) for base rate loans, a per annum rate equal to the greater of (a) the prime rate for such day; (b) the federal funds effective rate for such day, plus 0.50%; or (c) LIBOR for a 30-day interest period as determined on such day, plus between 1.25% and 1.75%. The percentage margin on all loans is based on our fixed charge coverage ratio for the most recent four quarters. As of December 31, 2014, we would have been permitted to draw $117.2 million under the credit facility at LIBOR plus 1.75%, or base rate plus 1.25%.
	A minimum fixed charge coverage ratio is the only financial covenant requirement under our credit facility and is triggered when there are any commitments or obligations outstanding and availability falls below 12.5% or an event of default exists, at which time the minimum fixed charge coverage ratio must be at least 1.0-to-1.0. As of December 31, 2014, the fixed charge coverage ratio for the most recent four quarters was 1.1-to-1.0.
	Our obligations under the revolving credit facility are secured by certain of our accounts receivable, inventory and cash. The terms of the credit facility contain various provisions that limit our discretion in the operations of our business by restricting our ability to, among other things, pay dividends; redeem or repurchase capital stock; create, incur or guarantee certain debt; incur liens on certain properties; make capital expenditures; enter into certain affiliate transactions; enter into certain hedging arrangements; and consolidate with or merge with another entity. The revolving credit facility contains usual and customary affirmative and negative covenants and usual and customary events of default.

Other_LongTerm_Obligations

Other Long-Term Obligations	12 Months Ended
	Dec. 31, 2014
Disclosure Other Long Term Obligations [Abstract]
Other Long-Term Obligations	Other Long-Term Obligations
	(In thousands)	December 31, 2014		December 31, 2013
	Long-term lease obligations, net of current portion	$	24,805	$	24,815
	Deferred compensation	14,609		14,149
	Deferred proceeds	12,360		11,205
	Other	5,082		2,773
		$	56,856	$	52,942

Reclassification_out_of_Accumu

Reclassification out of Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Accumulated Other Comprehensive Income [Text Block]	Accumulated Other Comprehensive Loss
	Accumulated other comprehensive loss at the balance sheet dates is comprised of the following:
	(In thousands)	Foreign Currency Translation Adjustments1			Pension and Other Post Retirement Employee Benefit Plan Adjustments			Total
	Balance at December 31, 2013	$	(874	)	$	(57,219	)	$	(58,093	)
	Other comprehensive income before reclassifications	—			4,773			4,773
	Amounts reclassified from accumulated other comprehensive loss	874			(18,417		)	(17,543		)
	Other comprehensive income, net of tax2	874			(13,644		)	(12,770		)
	Balance at December 31, 2014	$	—		$	(70,863	)	$	(70,863	)
	(In thousands)	Foreign Currency Translation Adjustments1			Pension and Other Post Retirement Employee Benefit Plan Adjustments			Total
	Balance at December 31, 2012	$	(874	)	$	(114,819	)	$	(115,693	)
	Other comprehensive income before reclassifications	—			9,468			9,468
	Amounts reclassified from accumulated other comprehensive loss	—			48,132			48,132
	Other comprehensive income, net of tax2	—			57,600			57,600
	Balance at December 31, 2013	$	(874	)	$	(57,219	)	$	(58,093	)
	1	This balance consists of unrealized foreign currency translation adjustments related to the operations of our former Canadian subsidiary before its functional currency was changed from Canadian dollars to U.S. dollars in 2012. As a result of the divestiture of our specialty business and mills, this balance was written-off and included in our net loss on divested assets.
	2	For the year ended December 31, 2014, net periodic costs associated with our pension and other postretirement employee benefit, or OPEB, plans included in other comprehensive loss and reclassified from accumulated other comprehensive loss, or AOCL, included $38.6 million of net loss on plan assets, $9.8 million of actuarial loss amortization, $8.4 million of prior service credit arising during the period and $2.0 million of prior service credit amortization, less total tax of $8.8 million. For the year ended December 31, 2013, net periodic costs associated with our pension and OPEB plans included in other comprehensive income and reclassified from AOCL included $83.6 million of net gain on plan assets, $14.8 million of actuarial loss amortization, $5.1 million of prior service costs arising during the period, $0.2 million of prior service credit amortization and $0.8 million of curtailments, less total tax of $36.3 million. These accumulated other comprehensive loss components are included in the computation of net periodic pension and OPEB costs in Note 13, “Savings, Pension and Other Postretirement Employee Benefit Plans.”

Savings_Pension_and_Other_Post

Savings, Pension and Other Postretirement Employee Benefit Plans	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Savings, Pension and Other Postretirement Employee Benefit Plans	Savings, Pension and Other Postretirement Employee Benefit Plans
	Certain of our employees are eligible to participate in defined contribution savings and defined benefit postretirement plans. These include 401(k) savings plans, defined benefit pension plans including company-sponsored and multiemployer plans, and Other Postretirement Employee Benefit, or OPEB, plans, each of which is discussed below.
	401(k) Savings Plans
	Substantially all of our employees are eligible to participate in 401(k) savings plans, which include a company match component. In 2014, 2013 and 2012, we made matching 401(k) contributions on behalf of employees of $17.4 million, $16.8 million and $14.9 million, respectively.
	Company-Sponsored Defined Benefit Pension Plans
	A majority of our salaried employees and a portion of our hourly employees are covered by company-sponsored noncontributory defined benefit pension plans.
	During the second quarter of 2013, we recorded a curtailment loss of $0.8 million in net periodic cost, and a corresponding change in Other Comprehensive Income, net of tax, due to the freezing of pension benefits for certain employees at our Lewiston, Idaho pulp and paperboard facility, effective June 30, 2013. In the fourth quarter of 2012, we recorded a curtailment loss of $0.5 million in net periodic cost, and a corresponding change in Other Comprehensive Income, net of tax, as a result of certain hourly employees at our Cypress Bend, Arkansas pulp and paperboard facility electing to cease accruing further pension benefits effective December 31, 2012. In exchange, beginning January 1, 2013 and lasting for a certain number of years, these employees began receiving an enhanced employer contribution to one of our existing 401(k) savings plan in which they participate.
	Company-Sponsored OPEB Plans
	We also provide benefits under company-sponsored defined benefit retiree health care and life insurance plans, which cover certain salaried and hourly employees. Most of the retiree health care plans require retiree contributions and contain other cost-sharing features. The retiree life insurance plans are primarily noncontributory.
	Funded Status of Company-Sponsored Plans
	As required by current standards governing the accounting for defined benefit pension and other postretirement plans, we recognized the funded status of our company-sponsored plans on our Consolidated Balance Sheets at December 31, 2014 and 2013. The funded status is measured as the difference between plan assets at fair value (with limited exceptions) and the benefit obligation. For a pension plan, the benefit obligation is the projected benefit obligation; for any other postretirement employee benefit plan, such as a retiree health care plan, the benefit obligation is the accumulated postretirement employee benefit obligation. We use a December 31 measurement date for our benefit plans.
	The changes in benefit obligation, plan assets and funded status for company-sponsored benefit plans as of December 31 are as follows:
			Pension Benefit Plans								Other Postretirement
											Employee Benefit Plans
	(In thousands)		2014				2013				2014				2013
	Benefit obligation at beginning of year		$	293,388			$	333,257			$	107,327			$	134,618
	Service cost		1,390				1,738				454				552
	Interest cost		14,825				13,375				4,565				4,730
	Plan changes		—				—				(8,384		)		5,106
	Actuarial losses (gains)		47,548				(36,859		)		7,039				(30,322		)
	Medicare Part D subsidies received		—				—				123				308
	Benefits paid		(19,150		)		(18,123		)		(6,409		)		(7,665		)
	Benefit obligation at end of year		338,001				293,388				104,715				107,327
	Fair value of plan assets at beginning of year		286,598				254,556				20				19
	Actual return on plan assets		36,157				34,779				—				1
	Employer contribution		17,450				15,386				—				—
	Benefits paid		(19,150		)		(18,123		)		—				—
	Fair value of plan assets at end of year		321,055				286,598				20				20
	Funded status at end of year		$	(16,946	)		$	(6,790	)		$	(104,695	)		$	(107,307	)
	The December 31, 2014 pension and OPEB benefit obligations were unfavorably affected by lower discount rates and the adoption of new mortality tables.
	Amounts recognized in the Consolidated Balance Sheets:
			Pension Benefit Plans								Other Postretirement
											Employee Benefit Plans
	(In thousands)		2014				2013				2014				2013
	Noncurrent asset		$	4,738			$	4,488			$	—			$	—
	Current liabilities		(438		)		(364		)		(7,477		)		(8,414		)
	Noncurrent liabilities		(21,246		)		(10,914		)		(97,218		)		(98,893		)
	Net amount recognized		$	(16,946	)		$	(6,790	)		$	(104,695	)		$	(107,307	)
	Pre-tax amounts recognized in Accumulated Other Comprehensive Loss as of December 31 consist of:
			Pension Benefit Plans								Other Postretirement
											Employee Benefit Plans
	(In thousands)		2014				2013				2014				2013
	Net loss (gain)		$	130,708			$	109,218			$	1,410			$	(5,915	)
	Prior service cost (credit)		103				308				(7,101		)		(896		)
	Net amount recognized		$	130,811			$	109,526			$	(5,691	)		$	(6,811	)
	Information as of December 31 for certain pension plans included above with accumulated benefit obligations in excess of plan assets were as follows:
	(In thousands)		2014				2013
	Projected benefit obligation		$	338,001			$	293,388
	Accumulated benefit obligation		338,001				293,388
	Fair value of plan assets		321,055				286,598
	Pre-tax components of net periodic cost and other amounts recognized in Other Comprehensive (Loss) Income for the years ended December 31 were as follows:
	Net Periodic Cost:
			Pension Benefit Plans												Other Postretirement
															Employee Benefit Plans
	(In thousands)		2014				2013				2012				2014				2013				2012
	Service cost		$	1,390			$	1,738			$	2,485			$	454			$	552			$	693
	Interest cost		14,825				13,375				14,693				4,565				4,730				5,815
	Expected return on plan assets		(20,196		)		(18,352		)		(19,685		)		—				—				—
	Amortization of prior service cost (credit)		205				337				634				(2,179		)		(502		)		(2,680		)
	Amortization of actuarial loss (gain)		10,097				14,840				12,085				(286		)		—				—
	Curtailments		—				769				477				—				—				—
	Net periodic cost		$	6,321			$	12,707			$	10,689			$	2,554			$	4,780			$	3,828
	Other amounts recognized in Other Comprehensive (Loss) Income:
			Pension Benefit Plans												Other Postretirement
Employee Benefit Plans
(In thousands)		2014				2013				2012				2014				2013				2012
Net loss (gain)		$	31,587			$	(53,285	)		$	12,989			$	7,039			$	(30,323	)		$	3,150
Curtailments		—				(769		)		(477		)		—				—				—
Prior service (credit) cost		—				—				—				(8,384		)		5,106				(5,278		)
Amortization of prior service (cost) credit		(205		)		(337		)		(634		)		2,179				502				2,680
Amortization of actuarial (loss) gain		(10,097		)		(14,840		)		(12,085		)		286				—				—
Total recognized in other comprehensive		$	21,285			$	(69,231	)		$	(207	)		$	1,120			$	(24,715	)		$	552
loss (income)
Total recognized in net periodic cost and		$	27,606			$	(56,524	)		$	10,482			$	3,674			$	(19,935	)		$	4,380
other comprehensive loss (income)
The estimated net loss and prior service cost for the defined benefit pension plans that will be amortized from accumulated other comprehensive loss into net periodic cost (benefit) over the next fiscal year are $12.3 million and $0.1 million, respectively. The estimated prior service credit for the OPEB plans that will be amortized from accumulated other comprehensive loss into net periodic cost (benefit) over the next fiscal year is $2.2 million.
During 2014, $6.6 million of net periodic pension and OPEB costs were charged to "Cost of sales," and $2.3 million were charged to "Selling, general and administrative expenses" in the accompanying Consolidated Statements of Operations, as compared to $14.2 million and $3.3 million, respectively, during 2013.
The Medicare Prescription Drug Improvement and Modernization Act of 2003 introduced a drug benefit under Medicare Part D and a federal subsidy to sponsors of retiree health care benefit plans that provide an equivalent benefit. Our actuaries determined that certain benefits provided under our plans are actuarially equivalent to the Medicare Part D standard plan and are eligible for the employer subsidy. During 2014 and 2013, we received subsidy payments totaling $0.1 million and $0.3 million for each respective year.
Weighted average assumptions used to determine the benefit obligation as of December 31 were:
		Pension Benefit Plans									Other Postretirement
											Employee Benefit Plans
		2014			2013			2012			2014			2013			2012
Discount rate		4.25	%		5.2	%		4.15	%		4.15	%		5.05	%		4.05	%
Weighted average assumptions used to determine the net periodic cost for the years ended December 31 were:
		Pension Benefit Plans									Other Postretirement
											Employee Benefit Plans
		2014			2013			2012			2014			2013			2012
Discount rate		5.2	%		4.15	%		4.9	%		5.05	%		4.05	%		4.95	%
Expected return on plan assets		7.5			7.5			8			—			—			—
The discount rate used in the determination of pension benefit obligations and pension expense was determined based on a review of long-term high-grade bonds as well as management’s expectations. The discount rate used to calculate OPEB obligations was determined using the same methodology we used for our pension plans.
The expected return on plan assets assumption is based upon an analysis of historical long-term returns for various investment categories, as measured by appropriate indices. These indices are weighted based upon the extent to which plan assets are invested in the particular categories in arriving at our determination of a composite expected return.
The assumed health care cost trend rate used to calculate OPEB obligations and expense was 6.30% in 2014, grading to a range of 4.30% to 4.50% over approximately 70 years. This assumption has a significant effect on the amounts reported. A one percentage point change in the health care cost trend rates would have the following effects:
(In thousands)		1% Increase				1% Decrease
Effect on total of service and interest cost components		$	493			$	(414	)
Effect on postretirement employee benefit obligation		10,277				(8,657		)
The investments of our defined benefit pension plans are held in a Master Trust. The assets of our OPEB plans are held within an Internal Revenue Code section 401(h) account for the payment of retiree medical benefits within the Master Trust.
As of December 31, 2014, the Master Trust no longer has a securities lending agreement.
Current accounting rules governing fair value measurement establish a framework for measuring fair value, which provides a fair value hierarchy 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). The three levels of the fair value hierarchy are described below:
Level 1		Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets that the plans have the ability to access.
Level 2		Inputs to the valuation methodology include:
		▪
		Quoted prices for similar assets or liabilities in active markets;
		▪
		Quoted prices for identical or similar assets or liabilities in inactive markets;
		▪
		Inputs other than quoted prices that are observable for the asset or liability; and
		▪
		Inputs that are derived principally from or corroborated by observable market data by correlation or other means
		If the asset or liability has a specified (contractual) term, the Level 2 input must be observable for substantially the full term of the asset or liability.
Level 3		Inputs to the valuation methodology are unobservable and significant to the fair value measurement.
The asset’s or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used need to maximize the use of observable inputs and minimize the use of unobservable inputs.
There have been no changes in the methodologies used during 2014, however, in 2014, a majority of our investments were transferred into a common and collective trust. Investments in common and collective trust funds, hedge funds and liquidating trusts that maintain investments in mortgage-backed securities are generally valued based on their respective net asset value, or NAV, (or its equivalent), as a practical expedient to estimate fair value due to the absence of readily available market prices. Investments that may be fully redeemed at NAV in the near-term are generally classified as Level 2.
The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while management believes the valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date.
The following tables set forth by level, within the fair value hierarchy, the investments at fair value for our company-sponsored pension benefit plans:
		31-Dec-14
(In thousands)		Level 1				Level 2				Level 3				Total
Cash and cash equivalents		$	2,023			$	—			$	—			$	2,023
Common and collective trust:
Collective investment funds		—				319,032				—				319,032
Total investments at fair value		$	2,023			$	319,032			$	—			$	321,055
		December 31, 2013
(In thousands)		Level 1				Level 2				Level 3				Total
Cash and cash equivalents		$	4,314			$	—			$	—			$	4,314
Common and collective trusts:
International small cap		—				15,845				—				15,845
Global/International equity		—				21,198				—				21,198
International equity emerging markets		—				17,809				—				17,809
Common stocks:
Industrials		9,307				—				—				9,307
Energy		2,663				—				—				2,663
Consumer		8,002				—				—				8,002
Healthcare		6,013				—				—				6,013
Finance		11,566				—				—				11,566
Utilities		1,711				—				—				1,711
Information technology		8,785				—				—				8,785
Foreign		6,175				—				—				6,175
Mutual funds:
Foreign large blend		18,492				—				—				18,492
Long-term bond fund		137,031				—				—				137,031
Mid-cap growth fund		18,009				—				—				18,009
Subtotal		$	232,068			$	54,852			$	—			$	286,920
Payable held under securities lending agreement														(322		)
Total investments at fair value														$	286,598
Our OPEB plan had approximately $20,000 held in cash and equivalents at December 31, 2014, which were categorized as level 1.
We have formal investment policy guidelines for our company-sponsored plans. These guidelines were set by our Benefits Committee, which is comprised of members of our management and has been assigned its fiduciary authority over management of the plan assets by our Board of Directors. The Committee’s duties include periodically reviewing and modifying those investment policy guidelines as necessary and insuring that the policy is adhered to and the investment objectives are met.
The investment policy includes guidelines for specific categories of equity and fixed income securities. Assets are managed by professional investment managers who are expected to achieve a reasonable rate of return over a market cycle. Long-term performance is a fundamental tenet of the policy.
The general policy states that plan assets would be invested to seek the greatest return consistent with the fiduciary character of the pension funds and to allow the plans to meet the need for timely pension benefit payments. The specific investment guidelines stipulate that management is to maintain adequate liquidity for meeting expected benefit payments by reviewing, on a timely basis, contribution and benefit payment levels and appropriately revising long-term and short-term asset allocations. Management takes reasonable and prudent steps to preserve the value of pension fund assets, avoid the risk of large losses and also attempt to preserve the funded status of the plans. Major steps taken to provide this protection included:
▪	Assets are diversified among various asset classes, such as domestic equities, international equities, fixed income and cash. The long-term asset allocation ranges are as follows:
Domestic equities			14%-22%
International equities, including emerging markets			13%-22%
Corporate bonds			50%-70%
Liquid reserves			0%-5%
Periodically, reviews of allocations within these ranges are made to determine what adjustments should be made based on changing economic and market conditions and specific liquidity requirements.
▪	Assets were managed by professional investment managers and could be invested in separately managed accounts or commingled funds.
▪	Assets were not invested in securities rated below BBB- by S&P or Baa3 by Moody’s.
The investment guidelines also required that the individual investment managers were expected to achieve a reasonable rate of return over a market cycle. Emphasis was placed on long-term performance versus short-term market aberrations. Factors considered in determining reasonable rates of return included performance achieved by a diverse cross section of other investment managers, performance of commonly used benchmarks (e.g., Russell 3000 Index, MSCI World ex-U.S. Index, Barclays Capital Long Credit Index), actuarial assumptions for return on plan investments and specific performance guidelines given to individual investment managers.
As of December 31, 2014, ten active investment managers managed substantially all of the pension funds, each of whom had responsibility for managing a specific portion of these assets. Plan assets were diversified among the various asset classes within the allocation ranges approved by the Benefits Committee.
In 2014, we contributed $17.0 million to our qualified pension plans. Our cash contributions in 2015 are estimated to be approximately $12 million. We also contributed $0.5 million to our non-qualified pension plan in 2014. We are not required to make contributions to our qualified pension plans during 2015, and we do not anticipate funding our OPEB plans in 2015 except to pay benefit costs as incurred during the year by plan participants..
Estimated future benefit payments are as follows for the years indicated:
(In thousands)		Pension Benefit Plans				Other
						Postretirement
						Employee
						Benefit Plans
2015		$	19,023			$	7,497
2016		19,318				7,794
2017		19,683				7,728
2018		20,055				7,781
2019		20,543				7,526
2020-2023		104,772				31,412
Multiemployer Defined Benefit Pension Plans
Hourly employees at two of our manufacturing facilities participate in multiemployer defined benefit pension plans: the PACE Industry Union-Management Pension Fund, or PIUMPF, which is managed by United Steelworkers, or USW, Benefits; and the International Association of Machinist & Aerospace Workers National Pension Fund, or IAM NPF. We make contributions to these plans, as well as make contributions to a trust fund established to provide retiree medical benefits for a portion of these employees, which is also managed by USW Benefits. The risks of participating in these multiemployer plans are different from single-employer plans in the following respects:
▪	Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers.
▪	If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers.
▪	Under applicable federal law, any employer contributing to a multiemployer pension plan that completely ceases participating in the plan while it is underfunded is subject to an assessment of such employer's allocable share of the aggregate unfunded vested benefits of the plan. In certain circumstances, an employer can also be assessed a withdrawal liability for a partial withdrawal from a multiemployer pension plan. Based on information as of December 31, 2013 provided by PIUMPF and reviewed by our actuarial consultant, we estimate the aggregate pre-tax liability that we would have incurred if we had completely withdrawn from PIUMPF in 2014 would have been in excess of $72 million. However, the exact amount of potential exposure could be higher or lower than the estimate, depending on, among other things, the nature and timing of any triggering events and the funded status of PIUMPF at that time. A withdrawal liability is recorded for accounting purposes when withdrawal is probable and the amount of the withdrawal obligation is reasonably estimable.
Our participation in these plans for the annual period ended December 31, 2014, is outlined in the table below. The “EIN" and "Plan Number” columns provide the Employee Identification Number, or EIN, and the three-digit plan number. The most recent Pension Protection Act, or PPA, zone status available in 2014 and 2013 is for a plan’s year-end as of December 31, 2014 and December 31, 2013, respectively. The zone status is based on information we received from the plans and is certified by each plan's actuary. Among other factors, plans in the red zone are generally less than 65 percent funded, plans in the yellow zone are less than 80 percent but more than 65 percent funded, and plans in the green zone are at least 80 percent funded. The “FIP/RP Status Pending/Implemented” column indicates plans for which a Funding Improvement Plan, or FIP, or a Rehabilitation Plan, or RP, is either pending or has been implemented as required by the PPA as a measure to correct its underfunded status. The last column lists the expiration date(s) of the collective-bargaining agreement(s) to which the plans are subject.
In 2013, the contribution rates for the IAM NFP plan increased to $4.00 an hour, up from $3.25 an hour in 2012, affecting the comparability of the contributions year over year. In 2011, contribution rates for PIUMPF were increased as part of the RP in lieu of the legally required surcharge, paid by the employers, to assist the fund’s financial status. We were listed in PIUMPF’s Form 5500 report as providing more than five percent of the total contributions for the years 2013 and 2012. At the date of issuance of our consolidated financial statements, Form 5500 reports for these plans were not available for the 2014 plan year.
Pension		EIN		Plan		PPA Zone Status				FIP/RP Status Pending/		Contributions (in thousands)												Surcharge	Expiration
Fund				Number						Implemented														Imposed	Date
																									of Collective
																									Bargaining
						2014		2013				2014				2013				2012					Agreement 1
IAM NPF		51-6031295		2		Green		Green		N/A		$	343			$	343			$	288			No	5/31/16
PIUMPF		11-6166763		1		Red		Red		Implemented		5,665				5,718				5,673				No	8/31/14
									Total Contributions:			$	6,008			$	6,061			$	5,961
1	The Collective Bargaining Agreement at Lewiston, Idaho for employees associated with PIUMPF expired on 8/31/2014. As of the date of this report, a new agreement is still being negotiated.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share
	Basic (loss) earnings per share are based on the weighted average number of shares of common stock outstanding. Diluted earnings per share are based upon the weighted average number of shares of common stock outstanding plus all potentially dilutive securities that were assumed to be converted into common shares at the beginning of the period under the treasury stock method. This method requires that the effect of potentially dilutive common stock equivalents be excluded from the calculation of diluted earnings per share for the periods in which net losses are reported because the effect is anti-dilutive. For the year ended December 31, 2014, 566,041 of our incremental shares related to restricted stock units, performance shares, and stock options were excluded from our earnings per share calculation due to their anti-dilutive effect as a result of our net loss during the period.
	The following table reconciles the number of common shares used in calculating the basic and diluted net earnings per share:
			2014			2013		2012
	Basic average common shares outstanding1		20,129,557			22,081,026		23,298,663
	Incremental shares due to:
	Restricted stock units		—			53,803		24,086
	Performance shares		—			129,003		291,036
	Stock options		—			—		—
	Diluted average common shares outstanding		20,129,557			22,263,832		23,613,785
	Basic net (loss) earnings per common share		$	(0.11	)	$	4.84	$	2.75
	Diluted net (loss) earnings per common share		(0.11		)	4.8		2.72
	Anti-dilutive shares excluded from calculation		566,041			41,337		9,992
	1	Basic average common shares outstanding include restricted stock awards that are fully vested, but are deferred for future issuance. See Note 15, "Equity-Based Compensation Plans" for further discussion.

EquityBased_Compensation_Plans

Equity-Based Compensation Plans	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity-Based Compensation Plans	Equity-Based Compensation Plans
	The Clearwater Paper Corporation 2008 Stock Incentive Plan, or Stock Plan, which has been approved by our stockholders, provides for equity-based awards in the form of restricted shares, restricted stock units, or RSUs, performance shares, stock options, or stock appreciation rights to selected employees, outside directors, and consultants of the company. The Stock Plan became effective on December 16, 2008. Under the Stock Plan, as amended, we are authorized to issue up to approximately 4.1 million shares, which includes approximately 0.7 million additional shares authorized in connection with our acquisition of Cellu Tissue that are available for issuance as equity-based awards only to any employees, outside directors, or consultants who were not employed on December 26, 2010 by Clearwater Paper Corporation or any of its subsidiaries. At December 31, 2014, approximately 1.9 million shares were available for future issuance under the Stock Plan.
	We recognize equity-based compensation expense for all equity-based payment awards made to employees and directors, including RSUs, performance shares and stock options, based on estimated fair values and net of estimates of future forfeitures. The expense is classified in "Selling, general and administrative expense" in our Consolidated Statements of Operations and is recognized on a straight-line basis over the requisite service periods of each award. Based on the terms of the Stock Plan, retirement-eligible employees become fully vested in outstanding awards on the later of that date they reach retirement eligibility or at the end of the first calendar year of each respective grant. We account for this feature when determining the service period over which to recognize expense for each grant of RSUs, performance shares, and stock options.
	Employee equity-based compensation expense was recognized as follows:
	(In thousands)		2014			2013			2012
	Restricted stock units		$	1,966		$	1,801		$	970
	Performance shares		4,964			5,075			7,364
	Stock options		1,254			—			—
	Total employee equity-based compensation		$	8,184		$	6,876		$	8,334
	Related tax benefit		$	2,955		$	2,049		$	2,886
	RESTRICTED STOCK UNITS
	RSUs granted under our Stock Plan are generally subject to a vesting period of one to three years. RSU awards will accrue dividend equivalents based on dividends paid, if any, during the RSU vesting period. The dividend equivalents will be converted into additional RSUs that will vest in the same manner as the underlying RSUs to which they relate. RSUs granted under our Stock Plan do not represent common stock, and therefore the holders do not have voting rights unless and until shares are issued upon settlement.
	A summary of the status of outstanding unvested RSU awards as of December 31, 2014, 2013 and 2012, and changes during those years, is presented below:
			2014					2013					2012
			Shares		Weighted			Shares			Weighted		Shares		Weighted
					Average						Average				Average
					Grant Date						Grant Date				Grant Date
					Fair Value						Fair Value				Fair Value
	Unvested shares outstanding at
	1-Jan		102,658		$	39.85		63,727			$	35.57	169,344		$	11.33
	Granted		31,567		66.33			72,702			43.44		52,294		34.59
	Vested		(32,117	)	38.94			(30,190	)		39.21		(155,177	)	8.82
	Forfeited		(8,854	)	52.28			(3,581	)		42.03		(2,734	)	34.07
	Unvested shares outstanding at		93,254		47.95			102,658			39.85		63,727		35.57
	December 31
	Aggregate intrinsic value (in				$	6,393					$	5,390			$	2,496
	thousands)
	During 2014, 75,400 shares of RSUs were distributed. Of these shares, 27,933 were RSU shares that were settled and distributed in the fourth quarter of 2014. The remaining 47,467 shares were RSU shares that were settled in prior years but distribution had been deferred to preserve tax deductibility for the company in the respective years because distribution of these shares would have resulted in certain executive compensation being above the Internal Revenue Code section 162(m) threshold for those years. After adjusting for minimum tax withholdings, a net 48,476 shares were issued during 2014. The minimum tax withholdings payment made in 2014 in connection with issued shares was $1.5 million.
	During 2013, 126,726 shares of RSUs were distributed. Of these shares, 22,370 were RSU shares that were settled and distributed in the fourth quarter of 2013. The remaining 104,356 shares had been deferred to preserve tax deductibility for the company under Internal Revenue Code section 162(m). After adjusting for minimum tax withholdings and deferred shares, a net 73,154 shares were issued during 2013. The minimum tax withholdings payment made in 2013 in connection with issued shares was $2.6 million.
	As of December 31, 2014 a total of 37,135 shares remain deferred under Internal Revenue Code section 162(m).
	The fair value of each RSU share award granted during 2014 was estimated on the date of grant using the grant date market price of our common stock. The total fair value of share awards that vested during 2014 was $1.3 million.
	As of December 31, 2014, there was $2.3 million of total unrecognized compensation cost related to outstanding RSU awards. The cost is expected to be recognized over a weighted average period of 1.5 years.
	PERFORMANCE SHARES
	Performance share awards granted under our Stock Plan have a three-year performance period, with generally the same service period, and shares are issued after the end of the period if the employee provides the requisite service and the performance measure is met. The performance measure is a comparison of the percentile ranking of our total stockholder return compared to the total stockholder return performance of a selected peer group or index. The performance measure is considered to represent a “market condition” under authoritative accounting guidance, and thus, the market condition is considered when determining the estimate of the fair value of the performance share awards. The number of shares actually issued, as a percentage of the amount subject to the performance share award, could range from 0%-200%.
	Performance share awards granted under our Stock Plan do not represent common stock, and therefore the holders do not have voting rights unless and until shares are issued upon settlement. During the performance period, dividend equivalents accrue based on dividends paid, if any, and are converted into additional performance shares, which vest or are forfeited in the same manner as the underlying performance shares to which they relate. Generally, if an employee terminates prior to completing the requisite service period, all or a portion of their awards are forfeited and the previously recognized compensation cost is reversed. If an employee provides the requisite service through the end of the performance period, but the performance measure is not met, following authoritative guidance for awards with a market condition, previously recognized compensation cost is not reversed.
	The fair value of performance share awards is estimated using a Monte Carlo simulation model. For performance shares granted in 2014, the following assumptions were used in our Monte Carlo model:
	Closing price of stock on date of grant	$	66.97
	Risk free rate	0.66		%
	Measurement period	3 years
	Volatility	30		%
	In addition to the above assumptions, the dividend yields for all companies were assumed to be zero since dividends are included in the definition of total shareholder return.
	A summary of the status of outstanding performance share awards as of December 31, 2014, 2013 and 2012, and changes during those years, is presented below:
			2014					2013					2012
			Shares		Weighted			Shares			Weighted		Shares		Weighted
					Average						Average				Average
					Grant Date						Grant Date				Grant Date
					Fair Value						Fair Value				Fair Value
	Outstanding share awards at		259,841		$	50.87		392,655			$	44.67	749,538		$	19.52
	January 1
	Granted		54,379		105.08			124,513			63.46		150,865		40.24
	Settled		—		—			(246,592	)		47.19		(499,680	)	5.65
	Forfeited		(13,356	)	71.03			(10,735	)		54.87		(8,068	)	42.15
	Outstanding share awards at		300,864		59.77			259,841			50.87		392,655		44.67
	December 31
	Aggregate intrinsic value (in				$	20,624					$	13,642			$	15,376
	thousands)
	On December 31, 2014, the performance period for performance shares granted in 2012 ended, and those performance shares will be settled and distributed, subject to the approval of the Board of Directors' Compensation Committee, at a range of 0%-200% of shares granted, in the first quarter of 2015. On December 31, 2013, the three-year performance period for 108,366 performance shares granted in 2011 ended. The requisite market condition performance measure was not met, and as such no shares were paid or issued under these awards.
	As of December 31, 2014, there was $5.3 million of unrecognized compensation cost related to outstanding performance share awards. The cost is expected to be recognized over a weighted average period of 1.1 years.
	STOCK OPTIONS
	In 2014, stock options were granted to certain employees under our Stock Plan. The stock options are generally subject to a vesting period of one to three years, with generally the same service period. Upon vesting, the holder is entitled to purchase a specified number of shares of Clearwater Paper common stock at a price per share equal to the closing market price of Clearwater Paper common stock on the date of grant. The options are exercisable for ten years from the date of grant.
	Stock options granted under our Stock Plan do not represent common stock, and therefore the holders do not have voting rights unless and until shares have been issued to the employee.
	The fair value of stock option awards was determined using a Black-Scholes option-pricing model. The Black-Scholes model utilizes a range of assumptions related to dividend yield, volatility, risk-free interest rate and employee exercise behavior. Expected volatility is based on Clearwater Paper's historical stock prices. The risk-free interest rate is based on constant maturity treasury rates with maturities matching the options' expected life on the grant date. The expected life, estimated in accordance with Securities and Exchange Commission Staff Accounting Bulletin 110, is the approximate mid-point between the expected vesting time and the remaining contractual life. The weighted-average fair value of stock options granted in 2014 on the grant date was estimated at $22.99 per option based on the following assumptions:
	Volatility	30	%
	Risk-free interest rate	2.05	%
Expected life-years	6.4
A summary of the status of outstanding stock option awards as of December 31, 2014, and changes during the year, is presented below:
		2014
		Shares		Weighted
				Average
				Grant Date
				Fair Value
Outstanding options at January 1		—		$	—
Granted		163,137		66.85
Forfeited		(12,557	)	66.97
Outstanding options at December 31		150,580		66.84
Aggregate intrinsic value (in thousands)				$	258
As of December 31, 2014, there was $2.1 million of unrecognized compensation cost related to nonvested stock options. The cost is expected to be recognized over a weighted average period of 1.8 years.
DIRECTOR AWARDS
In connection with joining our Board of Directors, in January 2009 our outside directors at that time were granted an award of phantom common stock units, which were credited to an account established on behalf of each director and vested ratably over a three-year period with the final vesting in January 2012. Subsequent equity awards have been granted annually in May, or on a pro-rata basis as applicable, to our outside directors in the form of phantom common stock units as part of their annual compensation, which are credited to their accounts. These awards vest ratably over a one-year period. These accounts will be credited with additional phantom common stock units equal in value to dividends paid, if any, on the same amount of common stock. Upon separation from service as a director, the vested portion of the phantom common stock units held by the director in a stock unit account are converted to cash based upon the then market price of the common stock and paid to the director. Due to its cash-settlement feature, we account for these awards as liabilities rather than equity and recognize the equity-based compensation expense or income at the end of each reporting period based on the portion of the award that is vested and the increase or decrease in the value of our common stock. We recorded director equity-based compensation expense totaling $4.6 million, $4.1 million and $1.4 million for the years ended December 31, 2014, 2013 and 2012, respectively. At December 31, 2014 , the liability amounts associated with director equity-based compensation included in "Other long-term obligations" and "Accounts payable and accrued liabilities" on our Consolidated Balance Sheets were $13.5 million and $1.4 million, respectively. At December 31, 2013, all liability amounts associated with director equity-based compensation, totaling $13.2 million, were included in "Other long-term obligations."

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements
	The estimated fair values of our financial instruments as of our balance sheet dates are presented below:
		December 31, 2014				December 31, 2013
	(In thousands)	Carrying		Fair		Carrying		Fair
		Amount		Value		Amount		Value
	Cash, short-term investments and restricted cash (Level 1)	$	81,101	$	81,101	$	95,206	$	95,206
	Long-term debt (Level 1)	575,000		558,000		650,000		651,313
	Accounting guidance establishes a framework for measuring the fair value of financial instruments, providing a hierarchy 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, or “Level 1” measurements, followed by quoted prices of similar assets or observable market data, or “Level 2” measurements, and the lowest priority to unobservable inputs, or “Level 3” measurements.
	The asset’s or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used should seek to maximize the use of observable inputs and minimize the use of unobservable inputs.
	Cash, short-term investments, restricted cash and long-term debt are the only items measured at fair value on a recurring basis. The carrying amount of our short-term investments approximates fair value due to their very short maturity periods, and such investments are at or near market yields.
	We do not have any financial assets measured at fair value on a nonrecurring basis. Nonfinancial assets measured at fair value on a nonrecurring basis include items such as long-lived assets held and used that are measured at fair value resulting from impairment, if deemed necessary.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Additional information [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	LEASE COMMITMENTS
	Our operating leases cover manufacturing, office, warehouse and distribution space, equipment and vehicles, which expire at various dates through 2028. Additionally, we have capital leases related to our North Carolina converting and manufacturing facilities. As leases expire, it can be expected that, in the normal course of business, certain leases will be renewed or replaced.
	As of December 31, 2014, under current operating and capital lease contracts, we had future minimum lease payments as follows:
	(In thousands)	Capital			Operating
	2015	$	2,530		$	14,588
	2016	2,576			11,899
	2017	2,623			9,669
	2018	2,670			6,351
	2019	2,697			3,293
	Thereafter	32,193			7,503
	Total future minimum lease payments	$	45,289		$	53,303
	Less interest portion	(21,238		)
	Present value of future minimum lease payments	$	24,051
	Rent expense for operating leases was $18.6 million, $19.4 million and $16.6 million for the years ended December 31, 2014, 2013 and 2012, respectively.

Segment_Information

Segment Information	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Information	Segment Information
	We are organized in two reportable operating segments: Consumer Products and Pulp and Paperboard. The following is a tabular presentation of business segment information for each of the past three years. Corporate information is included to reconcile segment data to the financial statements.
	(In thousands)		2014			2013			2012
	Segment net sales1:
	Consumer Products		$	1,183,385		$	1,149,692		$	1,134,556
	Pulp and Paperboard		783,754			740,138			739,748
	Total segment net sales		$	1,967,139		$	1,889,830		$	1,874,304
	Operating income:
	Consumer Products		$	34,131		$	52,799		$	93,347
	Loss on divested assets2		(40,159		)	—			—
	Pulp and Paperboard		144,171			95,781			103,910
			138,143			148,580			197,257
	Corporate		(58,332		)	(49,252		)	(51,870		)
	Income from operations		$	79,811		$	99,328		$	145,387
	Depreciation and amortization:
	Consumer Products		$	61,504		$	65,197		$	54,547
	Pulp and Paperboard		25,452			23,266			23,113
	Corporate		3,189			1,809			1,673
	Total depreciation and amortization		$	90,145		$	90,272		$	79,333
	Assets:
	Consumer Products		$	1,037,912		$	1,215,919		$	1,178,438
	Pulp and Paperboard		413,143			359,735			344,614
			1,451,055			1,575,654			1,523,052
	Corporate		134,873			169,171			110,404
	Total assets		$	1,585,928		$	1,744,825		$	1,633,456
	Capital expenditures:
	Consumer Products		$	43,562		$	46,647		$	183,330
	Pulp and Paperboard		45,146			30,846			19,954
			88,708			77,493			203,284
	Corporate		10,892			9,015			3,831
	Total capital expenditures		$	99,600		$	86,508		$	207,115
	1	In 2013 and 2012, pulp not utilized internally was sold by the Pulp and Paperboard segment to external customers resulting in net sales of $5.8 million and $9.0 million respectively. Commencing in 2014, the majority of excess pulp is sold by the Consumer Products segment and totaled $2.1 million.
	2	These costs relate to the sale of our Consumer Products segment’s specialty business and mills. For additional discussion, see Note 4, “Divested Assets”.
	Our manufacturing facilities and all other assets are located within the continental United States, except for one production facility in St. Catharines, Ontario, Canada. Our St. Catharines mill was sold on December 30, 2014 as part of the sale of the specialty business and mills to a private buyer. We sell and ship our products to customers in many foreign countries. Geographic information regarding our net sales is summarized as follows:
	(In thousands)		2014			2013			2012
	United States		$	1,840,726		$	1,751,001		$	1,726,561
	Japan		63,831			67,728			63,368
	Canada		25,411			26,161			29,557
	Korea		11,105			10,899			9,655
	Australia		7,219			7,924			7,786
	Mexico		3,385			2,964			6,102
	Taiwan		2,000			1,755			11,061
	China		1,876			5,404			3,488
	Other foreign countries		11,586			15,994			16,726
	Total net sales		$	1,967,139		$	1,889,830		$	1,874,304

Financial_Results_by_Quarter

Financial Results by Quarter	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Financial Results by Quarter	Financial Results by Quarter (Unaudited)
		Three Months Ended
	(In thousands—	March 31						June 30						September 30						December 31
	except per-share
	amounts)	2014			2013			2014			2013			2014			2013			2014			2013
	Net sales	$	484,920		$	460,824		$	498,759		$	471,002		$	511,142		$	487,845		$	472,318		$	470,159
	Costs and
	expenses:
	Cost of sales	(426,629		)	(414,209		)	(434,111		)	(414,521		)	(434,457		)	(441,237		)	(413,643		)	(401,404		)
	Selling, general and	(33,514		)	(34,132		)	(31,565		)	(26,767		)	(31,817		)	(27,766		)	(33,206		)	(30,466		)
	administrative
	expenses
	Loss on divested	—			—			—			—			—			—			(40,159		)	—
	assets
	Impairment of	(4,259		)	—			—			—			(890		)	—			(3,078		)	—
	assets
	Total operating	(464,402		)	(448,341		)	(465,676		)	(441,288		)	(467,164		)	(469,003		)	(490,086		)	(431,870		)
	costs and
	expenses
	Income (loss) from	20,518			12,483			33,083			29,714			43,978			18,842			(17,768		)	38,289
	operations
	Net earnings (loss)	$	6,226		$	(882	)	$	12,453		$	11,658		$	6,253		$	13,317		$	(27,247	)	$	82,862
	Net earnings (loss)
	per common share
	Basic	$	0.3		$	(0.04	)	$	0.61		$	0.52		$	0.32		$	0.6		$	(1.39	)	$	3.91
	Diluted	0.29			(0.04		)	0.61			0.52			0.31			0.6			(1.39		)	3.87

Supplemental_Guarantor_Financi

Supplemental Guarantor Financial Information	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Supplemental Guarantor Financial Information	Supplemental Guarantor Financial Information
	All of our directly and indirectly owned, domestic subsidiaries guarantee the 2014 Notes and the 2013 Notes on a joint and several basis. There are no significant restrictions on the ability of the guarantor subsidiaries to make distributions to Clearwater Paper, the issuer of the 2014 Notes and 2013 Notes. The following tables present the results of operations, financial position and cash flows of Clearwater Paper and its subsidiaries, the guarantor and non-guarantor entities, and the eliminations necessary to arrive at the information for Clearwater Paper on a consolidated basis.
	Clearwater Paper Corporation
	Consolidating Statement of Operations and Comprehensive Income (Loss)
	Twelve Months Ended December 31, 2014
					Guarantor			Non-Guarantor
	(In thousands)	Issuer			Subsidiaries			Subsidiaries			Eliminations			Total
	Net sales	$	1,573,912		$	531,520		$	43,929		$	(182,222	)	$	1,967,139
	Cost and expenses:
	Cost of sales	(1,321,143		)	(526,192		)	(43,727		)	182,222			(1,708,840		)
	Selling, general and administrative expenses	(107,141		)	(22,747		)	(214		)	—			(130,102		)
	Loss on divested assets	—			(40,159		)	—			—			(40,159		)
	Impairment of assets	—			(8,227		)	—			—			(8,227		)
	Total operating costs and expenses	(1,428,284		)	(597,325		)	(43,941		)	182,222			(1,887,328		)
	Income (loss) from operations	145,628			(65,805		)	(12		)	—			79,811
	Interest expense, net	(39,091		)	(59		)	—			—			(39,150		)
	Debt retirement costs	(24,420		)	—			—			—			(24,420		)
	Earnings (loss) before income taxes	82,117			(65,864		)	(12		)	—			16,241
	Income tax (provision) benefit	(47,694		)	7,439			(516		)	22,215			(18,556		)
	Equity in loss of subsidiary	(58,953		)	(528		)	—			59,481			—
	Net (loss) earnings	$	(24,530	)	$	(58,953	)	$	(528	)	$	81,696		$	(2,315	)
	Other comprehensive loss, net of tax	(12,770		)	—			—			—			(12,770		)
	Comprehensive loss	$	(37,300	)	$	(58,953	)	$	(528	)	$	81,696		$	(15,085	)
	Clearwater Paper Corporation
	Consolidating Statement of Operations and Comprehensive Income (Loss)
	Twelve Months Ended December 31, 2013
					Guarantor			Non-Guarantor
	(In thousands)	Issuer			Subsidiaries			Subsidiaries			Eliminations			Total
	Net sales	$	1,474,103		$	565,783		$	54,978		$	(205,034	)	$	1,889,830
	Cost and expenses:
	Cost of sales	(1,269,107		)	(553,006		)	(54,292		)	205,034			(1,671,371		)
	Selling, general and administrative expenses	(94,861		)	(22,918		)	(1,352		)	—			(119,131		)
	Total operating costs and expenses	(1,363,968		)	(575,924		)	(55,644		)	205,034			(1,790,502		)
	Income (loss) from operations	110,135			(10,141		)	(666		)	—			99,328
	Interest expense, net	(44,031		)	(5		)	—			—			(44,036		)
	Debt retirement costs	(17,058		)	—			—			—			(17,058		)
	Earnings (loss) before income taxes	49,046			(10,146		)	(666		)	—			38,234
	Income tax benefit (provision)	61,778			(4,420		)	(138		)	11,501			68,721
	Equity in loss of subsidiary	(15,370		)	(804		)	—			16,174			—
	Net earnings (loss)	$	95,454		$	(15,370	)	$	(804	)	$	27,675		$	106,955
	Other comprehensive income, net of tax	57,600			—			—			—			57,600
	Comprehensive income (loss)	$	153,054		$	(15,370	)	$	(804	)	$	27,675		$	164,555
	Clearwater Paper Corporation
	Consolidating Statement of Operations and Comprehensive Income (Loss)
	Twelve Months Ended December 31, 2012
					Guarantor			Non-Guarantor
	(In thousands)	Issuer			Subsidiaries			Subsidiaries			Eliminations			Total
	Net sales	$	1,404,467		$	539,570		$	59,442		$	(129,175	)	$	1,874,304
	Cost and expenses:
	Cost of sales	(1,178,148		)	(501,879		)	(57,020		)	129,175			(1,607,872		)
	Selling, general and administrative expenses	(96,668		)	(22,268		)	(2,109		)	—			(121,045		)
	Total operating costs and expenses	(1,274,816		)	(524,147		)	(59,129		)	129,175			(1,728,917		)
	Income from operations	129,651			15,423			313			—			145,387
	Interest expense, net	(33,796		)	—			—			—			(33,796		)
	Earnings before income taxes	95,855			15,423			313			—			111,591
	Income tax provision	(42,440		)	(14,362		)	(35		)	9,377			(47,460		)
	Equity in income of subsidiary	1,339			278			—			(1,617		)	—
	Net earnings	$	54,754		$	1,339		$	278		$	7,760		$	64,131
	Other comprehensive loss, net of tax	(428		)	—			—			—			(428		)
	Comprehensive income	$	54,326		$	1,339		$	278		$	7,760		$	63,703
	Clearwater Paper Corporation
	Consolidating Balance Sheet
	At December 31, 2014
	(In thousands)	Issuer			Guarantor			Non-Guarantor			Eliminations			Total
Subsidiaries					Subsidiaries
ASSETS
Current assets:
Cash	$	27,331		$	—		$	—		$	—		$	27,331
Restricted cash	1,500			—			—			—			1,500
Short-term investments	50,000			—			—			—			50,000
Receivables, net	117,970			16,557			—			(613		)	133,914
Taxes receivable	6,760			(15,758		)	—			10,253			1,255
Inventories	246,210			40,416			—			—			286,626
Deferred tax assets	14,733			5,206			—			1,821			21,760
Prepaid expenses	3,734			457			—			—			4,191
Total current assets	468,238			46,878			—			11,461			526,577
Property, plant and equipment, net	657,369			153,618			—			—			810,987
Goodwill	209,087						—			—			209,087
Intangible assets, net	5,224			19,732			—			—			24,956
Intercompany receivable (payable)	33,703			(21,629		)	—			(12,074		)	—
Investment in subsidiary	137,282			—			—			(137,282		)	—
Pension assets	4,738			—			—			—			4,738
Other assets, net	8,496			1,087			—			—			9,583
TOTAL ASSETS	$	1,524,137		$	199,686		$	—		$	(137,895	)	$	1,585,928
LIABILITIES AND STOCKHOLDERS’
EQUITY
Current liabilities:
Accounts payable and accrued	$	193,326		$	23,113		$	—		$	(613	)	$	215,826
liabilities
Current liability for pensions and	7,915			—			—			—			7,915
other postretirement employee
benefits
Total current liabilities	201,241			23,113			—			(613		)	223,741
Long-term debt	575,000			—			—			—			575,000
Liability for pensions and other	118,464			—			—			—			118,464
postretirement employee benefits
Other long-term obligations	56,029			827			—			—			56,856
Accrued taxes	1,902			794			—			—			2,696
Deferred tax liabilities	73,964			37,670			—			—			111,634
Accumulated other comprehensive loss,	(70,863		)	—			—			—			(70,863		)
net of tax
Stockholders’ equity excluding	568,400			137,282			—			(137,282		)	568,400
accumulated other comprehensive loss
TOTAL LIABILITIES AND	$	1,524,137		$	199,686		$	—		$	(137,895	)	$	1,585,928
STOCKHOLDERS’ EQUITY
Clearwater Paper Corporation
Consolidating Balance Sheet
At December 31, 2013
(In thousands)	Issuer			Guarantor			Non-Guarantor			Eliminations			Total
				Subsidiaries			Subsidiaries
ASSETS
Current assets:
Cash	$	18,273		$	—		$	5,402		$	—		$	23,675
Restricted cash	1,500			—			—			—			1,500
Short-term investments	70,000			—			—			—			70,000
Receivables, net	119,278			38,063			2,700			(1,167		)	158,874
Taxes receivable	3,709			(15,882		)	324			22,352			10,503
Inventories	198,476			65,017			4,295			—			267,788
Deferred tax assets	42,289			6,094			5			(10,850		)	37,538
Prepaid expenses	4,704			695			124			—			5,523
Total current assets	458,229			93,987			12,850			10,335			575,401
Property, plant and equipment, net	636,662			231,225			16,811			—			884,698
Goodwill	229,533			—			—			—			229,533
Intangible assets, net	—			39,619			1,159			—			40,778
Intercompany receivable (payable)	91,865			(63,932		)	(16,431		)	(11,502		)	—
Investment in subsidiary	196,763			5,575			—			(202,338		)	—
Pension assets	4,488			—			—			—			4,488
Other assets, net	8,772			1,155			—			—			9,927
TOTAL ASSETS	$	1,626,312		$	307,629		$	14,389		$	(203,505	)	$	1,744,825
LIABILITIES AND STOCKHOLDERS’
EQUITY
Current liabilities:
Accounts payable and accrued	$	140,125		$	45,736		$	5,954		$	(1,167	)	$	190,648
liabilities
Current liability for pensions and	8,778			—			—			—			8,778
other postretirement employee
benefits
Total current liabilities	148,903			45,736			5,954			(1,167		)	199,426
Long-term debt	650,000			—			—			—			650,000
Liability for pensions and other	109,807			—			—			—			109,807
postretirement employee benefits
Other long-term obligations	51,740			1,202			—			—			52,942
Accrued taxes	1,430			911			317			—			2,658
Deferred tax liabilities	59,338			63,017			2,543			—			124,898
Accumulated other comprehensive loss,	(58,093		)	—			—			—			(58,093		)
net of tax
Stockholders’ equity excluding	663,187			196,763			5,575			(202,338		)	663,187
accumulated other comprehensive loss
TOTAL LIABILITIES AND	$	1,626,312		$	307,629		$	14,389		$	(203,505	)	$	1,744,825
STOCKHOLDERS’ EQUITY
Clearwater Paper Corporation
Consolidating Statement of Cash Flows
Twelve Months Ended December 31, 2014
(In thousands)	Issuer			Guarantor			Non-Guarantor			Eliminations			Total
				Subsidiaries			Subsidiaries
CASH FLOWS FROM OPERATING
ACTIVITIES
Net loss	$	(24,530	)	$	(58,953	)	$	(528	)	$	81,696		$	(2,315	)
Adjustments to reconcile net loss to net cash
flows from operating activities:
Depreciation and amortization	59,373			28,468			2,304			—			90,145
Equity-based compensation expense	12,790			—			—			—			12,790
Impairment of assets	—			8,227			—			—			8,227
Deferred tax provision (benefit)	50,943			(21,921		)	(2,538		)	(12,671		)	13,813
Employee benefit plans	2,115			—			—			—			2,115
Deferred issuance costs and discounts	6,141			—			—			—			6,141
on long-term debt
Loss on divestiture of assets	—			29,059			—			—			29,059
Disposal of plant and equipment, net	471			488			—			—			959
Non-cash adjustments to unrecognized	472			(117		)	(317		)	—			38
taxes
Changes in working capital, net	(8,162		)	(4,711		)	625			—			(12,248		)
Change in taxes receivable, net	(3,051		)	79			121			12,099			9,248
Excess tax benefits from equity-based	(864		)	—			—			—			(864		)
payment arrangements
Change in non-current accrued taxes, net	—			290			—			—			290
Funding of qualified pension plans	(16,955		)	—			—			—			(16,955		)
Other, net	(636		)	(707		)	—			—			(1,343		)
Net cash flows from operating activities	78,107			(19,798		)	(333		)	81,124			139,100
CASH FLOWS FROM INVESTING
ACTIVITIES
Change in short-term investments, net	20,000			—			—			—			20,000
Additions to plant and equipment	(73,223		)	(19,450		)	(355		)	—			(93,028		)
Net proceeds from divested assets	107,740			—			—			—			107,740
Proceeds from the sale of assets	38			937			—			—			975
Net cash flows from investing activities	54,555			(18,513		)	(355		)	—			35,687
CASH FLOWS FROM FINANCING
ACTIVITIES
Proceeds from long-term debt	300,000			—			—			—			300,000
Repayment of long-term debt	(375,000		)	—			—			—			(375,000		)
Purchase of treasury stock	(100,000		)	—			—			—			(100,000		)
Investment from (to) parent	47,527			38,311			(4,714		)	(81,124		)	—
Payments for long-term debt issuance costs	(3,002		)	—			—			—			(3,002		)
Payment of tax withholdings on equity-	(1,523		)	—			—			—			(1,523		)
based payment arrangements
Excess tax benefits from equity-based	864			—			—			—			864
payment arrangements
Other, net	7,530			—			—			—			7,530
Net cash flows from financing activities	(123,604		)	38,311			(4,714		)	(81,124		)	(171,131		)
Increase (decrease) in cash	9,058			—			(5,402		)	—			3,656
Cash at beginning of period	18,273			—			5,402			—			23,675
Cash at end of period	$	27,331		$	—		$	—		$	—		$	27,331
Clearwater Paper Corporation
Consolidating Statement of Cash Flows
Twelve Months Ended December 31, 2013
(In thousands)	Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
CASH FLOWS FROM OPERATING
ACTIVITIES
Net earnings (loss)	$	95,454		$	(15,370	)	$	(804	)	$	27,675		$	106,955
Adjustments to reconcile net earnings (loss) to
net cash flows from operating activities:
Depreciation and amortization	54,291			33,712			2,269			—			90,272
Equity-based compensation expense	10,960			—			—			—			10,960
Deferred tax provision (benefit)	3,185			(9,072		)	(125		)	11,641			5,629
Employee benefit plans	10,131			—			—			—			10,131
Deferred issuance costs and discounts	4,964			—			—			—			4,964
on long-term debt
Disposal of plant and equipment, net	201			1,291			1			—			1,493
Non-cash adjustments to unrecognized	(75,308		)	—			—			—			(75,308		)
taxes
Changes in working capital, net	(31,256		)	11,747			4,487			—			(15,022		)
Change in taxes receivable, net	17,003			15,998			(324		)	(22,352		)	10,325
Change in non-current accrued taxes, net	1,423			(860		)	6			—			569
Funding of qualified pension plans	(15,050		)	—			—			—			(15,050		)
Other, net	(452		)	891			—			—			439
Net cash flows from operating activities	75,546			38,337			5,510			16,964			136,357
CASH FLOWS FROM INVESTING
ACTIVITIES
Change in short-term investments, net	(50,000		)	—			—			—			(50,000		)
Additions to plant and equipment	(65,708		)	(22,562		)	(2,323		)	—			(90,593		)
Net cash flows from investing activities	(115,708		)	(22,562		)	(2,323		)	—			(140,593		)
CASH FLOWS FROM FINANCING
ACTIVITIES
Proceeds from long-term debt	275,000			—			—			—			275,000
Repayment of long-term debt	(150,000		)	—			—			—			(150,000		)
Purchase of treasury stock	(100,000		)	—			—			—			(100,000		)
Investment from (to) parent	31,998			(15,780		)	746			(16,964		)	—
Payments for long-term debt issuance costs	(4,837		)	—			—			—			(4,837		)
Payment of tax withholdings on	(4,831		)	—			—			—			(4,831		)
equity-based payment arrangements
Net cash flows from financing activities	47,330			(15,780		)	746			(16,964		)	15,332
Increase (decrease) in cash	7,168			(5		)	3,933			—			11,096
Cash at beginning of period	11,105			5			1,469			—			12,579
Cash at end of period	$	18,273		$	—		$	5,402		$	—		$	23,675
Clearwater Paper Corporation
Consolidating Statement of Cash Flows
Twelve Months Ended December 31, 2012
(In thousands)	Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
CASH FLOWS FROM OPERATING
ACTIVITIES
Net earnings	$	54,754		$	1,339		$	278		$	7,760		$	64,131
Adjustments to reconcile net earnings to net
cash flows from operating activities:
Depreciation and amortization	48,191			29,030			2,112			—			79,333
Equity-based compensation expense	9,703			—			—			—			9,703
Deferred tax provision (benefit)	9,840			4,009			(188		)	(791		)	12,870
Employee benefit plans	9,366			—			—			—			9,366
Deferred issuance costs and discounts	2,010			—			—			—			2,010
on long-term debt
Disposal of plant and equipment, net	622			1,381			—			—			2,003
Non-cash adjustments to unrecognized	3,275			—			—			—			3,275
taxes
Changes in working capital, net	25,252			36,596			(567		)	—			61,281
Change in taxes receivable, net	(11,755		)	593			334			—			(10,828		)
Excess tax benefits from equity-based	(15,837		)	—			—			—			(15,837		)
payment arrangements
Change in non-current accrued taxes, net	(242		)	22			1,180			—			960
Funding of qualified pension plans	(20,627		)	—			—			—			(20,627		)
Other, net	1,317			(264		)	—			—			1,053
Net cash flows from operating activities	115,869			72,706			3,149			6,969			198,693
CASH FLOWS FROM INVESTING
ACTIVITIES
Change in short-term investments, net	35,001			—			—			—			35,001
Additions to plant and equipment	(190,296		)	(11,632		)	(1,848		)	—			(203,776		)
Proceeds from the sale of assets	—			1,035			—			—			1,035
Cash paid for acquisitions, net of	(9,264		)	—			—			—			(9,264		)
cash acquired
Net cash flows from investing activities	(164,559		)	(10,597		)	(1,848		)	—			(177,004		)
CASH FLOWS FROM FINANCING
ACTIVITIES
Purchase of treasury stock	(18,650		)	—			—			—			(18,650		)
Investment from (to) parent	75,198			(66,463		)	(1,766		)	(6,969		)	—
Payments for long-term debt issuance costs	(2		)	—			—			—			(2		)
Payment of tax withholdings on	(13,234		)	—			—			—			(13,234		)
equity-based payment arrangements
Excess tax benefits from equity-based	15,837			—			—			—			15,837
payment arrangements
Other, net	(1,500		)	—			—			—			(1,500		)
Net cash flows from financing activities	57,649			(66,463		)	(1,766		)	(6,969		)	(17,549		)
Increase (decrease) in cash	8,959			(4,354		)	(465		)	—			4,140
Cash at beginning of period	2,146			4,359			1,934			—			8,439
Cash at end of period	$	11,105		$	5		$	1,469		$	—		$	12,579

Summary_of_Significant_Accouti1

Summary of Significant Accouting Policies Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
SIGNIFICANT ESTIMATES	SIGNIFICANT ESTIMATES
	The preparation of financial statements in conformity with accounting principles generally accepted in the U.S., which we refer to in this report as GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of net sales and expenses during the reporting period. Significant areas requiring the use of estimates and measurement of uncertainty include determination of net realizable value for deferred tax assets, uncertain income tax positions, assessment of impairment of long-lived assets and goodwill, assessment of environmental matters, allocation of purchase price and fair value estimates for business combinations, equity-based compensation and pension and postretirement obligation assumptions. Actual results could differ from those estimates and assumptions.
SHORT-TERM INVESTMENTS AND RESTRICTED CASH	SHORT-TERM INVESTMENTS AND RESTRICTED CASH
	Our short-term investments are invested primarily in demand deposits, which have very short maturity periods, and therefore earn an interest rate commensurate with low-risk instruments. We do not attempt to hedge our exposure to interest rate risk for our short-term investments. Our restricted cash in which the underlying instrument has a term of greater than twelve months from the balance sheet date is classified as non-current and is included in “Other assets, net” on our Consolidated Balance Sheet. As of December 31, 2014, we had $1.5 million of restricted cash classified as current and $2.3 million of restricted cash classified as non-current on our Consolidated Balance Sheet. As of December 31, 2013, substantially all restricted cash balances were classified as current and included in "Restricted cash" on our Consolidated Balance Sheet.
TRADE ACCOUNTS RECEIVABLE	TRADE ACCOUNTS RECEIVABLE
	Trade accounts receivable are stated at the amount we expect to collect. Trade accounts receivable do not bear interest. The allowance for doubtful accounts is our best estimate of the losses we expect will result from the inability of our customers to make required payments. We generally determine the allowance based on a combination of actual historical write-off experience and an analysis of specific customer accounts. As of December 31, 2014 and 2013, we had allowances for doubtful accounts of $1.4 million and $1.9 million, respectively, which decreased primarily as a result of the sale of our specialty business and mills. Bad debt expense, net, charged to selling, general and administrative expenses during 2014, 2013 and 2012 was $0.1 million, $1.5 million and $0.2 million, respectively. All other activity impacting the allowance for doubtful accounts was immaterial for all periods.
PROPERTY, PLANT AND EQUIPMENT	PROPERTY, PLANT AND EQUIPMENT
	Property, plant and equipment are stated at cost, including assets acquired under capital lease obligations and any interest costs capitalized, less accumulated depreciation. Depreciation of buildings, equipment and other depreciable assets is determined using the straight-line method. Estimated useful lives generally range from 10 to 40 years for land improvements; 10 to 40 years for buildings and improvements; 5 to 25 years for machinery and equipment; and 2 to 15 years for office and other equipment. Assets we acquire through business combinations have estimated lives that are typically shorter than the assets we construct or buy new.
	We review the carrying value of our property, plant and equipment for impairment when events or changes in circumstances indicate that the carrying amount of those assets may not be recoverable. An impairment of property, plant and equipment exists when the carrying value is not considered to be recoverable through future undiscounted cash flows from operations and the carrying value of the assets exceeds the estimated fair value. During the first quarter of 2014, we permanently closed our Consumer Products segment's Long Island converting and distribution facility. As a result of this closure, we impaired certain plant and equipment.
Intangible Assets, Finite-Lived, Policy [Policy Text Block]	INTANGIBLE ASSETS
	We use estimates in determining and assigning the fair value of the useful lives of intangible assets, the amount and timing of related future cash flows and fair values of the related operations. Our intangible assets have definite lives and are amortized over their estimated useful lives. We assess our intangible assets for impairment annually and when events or changes in circumstances indicate that the carrying amount may not be recoverable.
	We recorded intangible assets as a result of our acquisition of Cellu Tissue Holdings, Inc., or Cellu Tissue, on December 27, 2010. We also recorded intangible assets as a result of our December 2012 acquisition of a wood chipping facility. During the first quarter of 2014, we permanently closed our Consumer Products segment's Long Island converting and distribution facility. As a result of this closure, we impaired certain intangible assets. In addition, during the fourth quarter of 2014 we determined that a customer relationship intangible asset related to our Pulp and Paperboard segment's wood chipping facility was fully impaired. Also, as a result of the December 30, 2014, sale of our specialty business and mills, certain intangible assets associated with the divested mills were written off and included in our loss on divested assets. See Note 4, "Asset Divestiture" and Note 7, "Goodwill and Intangible Assets" for further discussion.
GOODWILL AND INTANGIBLES	GOODWILL
	Goodwill from an acquisition represents the excess of the cost of a business acquired over the net of the amounts assigned to assets acquired, including identifiable intangible assets and liabilities assumed. We use estimates in determining and assigning the fair value of goodwill, including the amount and timing of related future cash flows and fair values of the related operations. Goodwill is not amortized but is tested for impairment annually as of November 1, as well as any time when events suggest impairment may have occurred. In the event the carrying value of the reporting unit in which our goodwill is assigned exceeds the estimated fair value of that reporting unit, an impairment loss would be recognized to the extent the carrying amount of the reporting unit exceeds its implied fair value.
	As a result of our acquisition of Cellu Tissue in December 2010, we recorded $229.5 million of goodwill as included on our Consolidated Balance Sheet as of December 31, 2013. All of the recorded goodwill was assigned to our Consumer Products segment and reporting unit. As a result of the December 30, 2014, sale of our specialty business and mills, a certain portion of goodwill was allocated to the divested mills and included in our loss on divested assets, see Note 4, "Asset Divestiture" and Note 7, "Goodwill and Intangible Assets" for further discussion. As of December 31, 2014, we had $209.1 million of goodwill included on our Consolidated Balance Sheet.
PENSION AND OTHER POSTRETIREMENT PLANS, POLICY [Policy Text Block]	PENSION AND OTHER POSTRETIREMENT EMPLOYEE BENEFITS
	The determination of pension plan expense and the requirements for funding our pension plans are based on a number of actuarial assumptions. Three critical assumptions are the discount rate applied to pension plan obligations, the rate of return on plan assets and mortality rates. For other postretirement employee benefit, or OPEB, plans, which provide certain health care and life insurance benefits to qualified retired employees, critical assumptions in determining OPEB expense are the discount rate applied to benefit obligations, the assumed health care cost trend rates used in the calculation of benefit obligations and mortality rates. We also participate in multiemployer defined benefit pension plans. We make contributions to these multiemployer plans, as well as make contributions to a trust fund established to provide retiree medical benefits for a portion of these employees.
	The discount rate used in the determination of pension benefit obligations and pension expense is determined based on a review of long-term high-grade bonds and management's expectations. To determine the expected long-term rate of return on pension assets, we employ a process that analyzes historical long-term returns for various investment categories, as measured by appropriate indices. These indices are weighted based upon the extent to which plan assets are invested in the particular categories in arriving at our determination of a composite expected return.
	An increase in the discount rate or the rate of expected return on plan assets, all other assumptions remaining the same, would decrease pension plan expense, and conversely, a decrease in either of these measures would increase plan expense. The actual rates of return on plan assets may vary significantly from the assumptions used because of unanticipated changes in financial markets.
	The estimated net loss and prior service cost (credit) for the defined benefit pension and OPEB plans is amortized from accumulated other comprehensive loss into net periodic cost (benefit) in accordance with current accounting guidance.
	Periodic pension and OPEB expenses are included in “Cost of sales” and “Selling, general and administrative expenses” in the Consolidated Statements of Operations. The expense is allocated to all business segments. In accordance with current accounting guidance governing defined benefit pension and other postretirement plans, at December 31, 2014 and 2013, long-term assets are recorded for overfunded single-employer plans and liabilities are recorded for underfunded single-employer plans. The funded status of a benefit plan is measured as the difference between plan assets at fair value and the projected benefit obligation. For underfunded single-employer plans, the estimated liability to be payable in the next twelve months is recorded as a current liability, with the remaining portion recorded as a long-term liability.
INCOME TAXES	INCOME TAXES
	Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the consolidated financial statement carrying amounts of existing assets and liabilities and their respective tax basis and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.
	The determination of our provision for income taxes requires significant judgment, the use of estimates, and the interpretation and application of complex tax laws. Significant judgment is required in assessing the timing and amounts of deductible and taxable items and the probability of sustaining uncertain tax positions. The benefits of uncertain tax positions are recorded in our consolidated financial statements only after determining a more-likely-than-not probability that the uncertain tax positions will withstand challenge, if any, from tax authorities. When facts and circumstances change, we reassess these probabilities and record any changes in the consolidated financial statements as appropriate.
REVENUE RECOGNITION	REVENUE RECOGNITION
	We recognize net sales when there is persuasive evidence of a sales agreement, the price to the customer is fixed and determinable, collection is reasonably assured, and title and the risk of loss passes to the customer. Shipping terms generally indicate when title and the risk of loss have passed. Revenue is recognized at shipment for sales when shipping terms are free on board, or FOB, shipping point. For sales where shipping terms are FOB destination, revenue is recognized when the goods are received by the customer. Revenue from both domestic and foreign sales of our products can involve shipping terms of either FOB shipping point or FOB destination or other shipping terms, depending upon the sales agreement with the customer.
	We did not have any single customer that accounted for 10% or more of our total net sales in either 2014 or 2012. In 2013, we had one customer in the Consumer Products segment, the Kroger Company, that accounted for approximately $204 million, or 10.8%, of our total company net sales.
	We provide for trade promotions, customer cash discounts, customer returns and other deductions as reductions to net sales in the same period as the related revenues are recognized. Provisions for these items are determined based on historical experience or specific customer arrangements.
	Revenue is recognized net of any sales taxes collected. Sales taxes, when collected, are recorded as a current liability and remitted to the appropriate governmental entities.
ENVIRONMENTAL	ENVIRONMENTAL
	As part of our corporate policy, we have an ongoing process to monitor, report on and comply with environmental requirements. Based on this ongoing process, accruals for environmental liabilities that are not within the scope of specific authoritative guidance related to accounting for asset retirement obligations or conditional asset retirement obligations are established in accordance with guidance related to accounting for contingencies. We estimate our environmental liabilities based on various assumptions and judgments, the specific nature of which varies in light of the particular facts and circumstances surrounding each environmental liability. These estimates typically reflect assumptions and judgments as to the probable nature, magnitude and timing of required investigation, remediation and monitoring activities and the probable cost of these activities. Currently, we are not aware of any material environmental liabilities and have accrued only for specific costs related to environmental matters that we have determined are probable and for which an amount can be reasonably estimated. Fees for professional services associated with environmental and legal issues are expensed as incurred.
STOCKHOLDERS' EQUITY	STOCKHOLDERS’ EQUITY
	On December 15, 2014, we announced that our Board of Directors had approved a new stock repurchase program authorizing the repurchase of up to $100 million of our common stock. The repurchase program authorizes purchases of our common stock from time to time through open market purchases, negotiated transactions or other means, including accelerated stock repurchases and 10b5-1 trading plans in accordance with applicable securities laws and other restrictions. We have no obligation to repurchase stock under this program and may suspend or terminate the program at any time.
	On February 5, 2014, we announced that our Board of Directors had approved a stock repurchase program authorizing the repurchase of up to $100 million of our common stock. We completed this program during the third quarter of 2014. In total, we repurchased 1,574,748 shares of our outstanding common stock at an average price of $63.50 per share under this program.
	On January 17, 2013, we announced that our Board of Directors had approved a stock repurchase program authorizing the repurchase of up to $100 million of our common stock, which was completed in 2013. Under this program, we repurchased 1,039,513 shares of our outstanding common stock under an accelerated stock buyback agreement with a major financial institution at an average repurchase price of $48.10 per share. We also made repurchases of 1,030,657 shares of our outstanding common stock on the open market at a total cost of $50 million, representing an an average price of $48.51 per share, under this program.
DERIVATIVES	DERIVATIVES
	We had no activity during the years ended December 31, 2014, 2013 and 2012 that required hedge or derivative accounting treatment. However, to partially mitigate our exposure to market risk for changes in utility commodity pricing, we use firm price contracts to supply a portion of the natural gas requirements for our manufacturing facilities. As of December 31, 2014, these contracts covered approximately 57% of the expected average monthly requirements for 2015, including approximately 67% of the expected average monthly requirements for the first quarter. For the years ended December 31, 2014, 2013 and 2012, approximately 58%, 16% and 29%, respectively, of our natural gas volumes were supplied through firm price contracts. These contracts qualify for treatment as “normal purchases or normal sales” under authoritative guidance and thus require no mark-to-market adjustment.

Inventories_Inventories_Polici

Inventories Inventories (Policies)	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventory, Policy [Policy Text Block]	At December 31, 2014, our inventories are stated at the lower of market or current average cost using the average cost method.

Inventories_Tables

Inventories (Tables)	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventories
	(In thousands)	December 31, 2014		December 31, 2013
	Pulp, paperboard and tissue products	$	188,760	$	182,715
	Materials and supplies	74,916		69,836
	Logs, pulpwood, chips and sawdust	22,950		15,237
		$	286,626	$	267,788

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment
	(In thousands)	December 31, 2014			December 31, 2013
	Machinery and equipment	$	1,830,245		$	1,937,914
	Buildings and improvements	311,468			304,971
	Land improvements	46,652			54,277
	Office and other equipment	21,832			11,951
	Land	7,221			11,827
	Construction in progress	43,668			40,204
		$	2,261,086		$	2,361,144
	Less accumulated depreciation and amortization	(1,450,099		)	(1,476,446		)
		$	810,987		$	884,698

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible assets at the balance sheet dates are comprised of the following:
			31-Dec-14
	(Dollars in thousands, lives in years)		Useful	Historical		Accumulated			Net
			Life	Cost		Amortization			Balance
	Customer relationships		9	$	41,001	$	(18,223	)	$	22,778
	Trade names and trademarks		10	3,286		(1,314		)	1,972
	Non-compete agreements		5	1,189		(983		)	206
	Total intangible assets			$	45,476	$	(20,520	)	$	24,956
			December 31, 2013
	(Dollars in thousands, lives in years)		Useful	Historical		Accumulated			Net
			Life	Cost		Amortization			Balance
	Customer relationships		9	$	53,957	$	(17,234	)	$	36,723
	Trade names and trademarks		10	5,300		(1,590		)	3,710
	Non-compete agreements		2.5 - 5.0	1,674		(1,329		)	345
	Total intangible assets			$	60,931	$	(20,153	)	$	40,778
Estimated Future Amortization Expense Related to Intangible Assets	As of December 31, 2014, estimated future amortization expense related to intangible assets is as follows (in thousands):
	Years ending December 31,	Amount
	2015	$	4,967
	2016	4,946
	2017	4,946
	2018	4,884
	2019	4,884
	Thereafter	329
	Total	$	24,956

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Earnings (Loss) Before Income Taxes Composition in Each Tax Jurisdiction	Earnings (loss) before income taxes is comprised of the following amounts in each tax jurisdiction:
	(In thousands)	2014			2013			2012
	United States	$	16,253		$	38,900		$	111,278
	Canada	(12		)	(666		)	313
	Earnings before income taxes	$	16,241		$	38,234		$	111,591
Provision (Benefit) for Income Taxes	The income tax provision (benefit) is comprised of the following:
	(In thousands)	2014			2013			2012
	Current
	Federal	$	2,355		$	(75,119	)	$	27,724
	State	1,872			506			6,637
	Foreign	516			263			229
		4,743			(74,350		)	34,590
	Deferred
	Federal	11,432			10,177			16,243
	State	2,381			(4,423		)	(3,180		)
	Foreign	—			(125		)	(193		)
		13,813			5,629			12,870
	Income tax provision (benefit)	$	18,556		$	(68,721	)	$	47,460
Income Tax Reconciliation	The income tax provision or benefit differs from the amount computed by applying the statutory federal income tax rate of 35.0% to earnings before income taxes due to the following:
	(In thousands)	2014			2013			2012
	Computed expected tax provision	$	5,685		$	13,381		$	39,063
	State and local taxes, net of federal income tax impact	1,543			1,279			4,398
	Adjustment for state deferred tax rate	1,546			(762		)	(742		)
	State investment tax credits	(1,039		)	(2,263		)	(9,077		)
	Federal credits and net operating losses	(485		)	(10,234		)	4,121
	Federal manufacturing deduction	(674		)	—			(3,288		)
	Uncertain tax positions	355			(69,144		)	4,801
	Loss on divested assets	10,554			—			—
	State attribute true up	(2,874		)	—			—
	New York state attribute true up	1,654			—			—
	Change in valuation allowances	2,346			(1,334		)	6,932
	U.S. tax provision on foreign operations	—			67			(33		)
	Other, net	(55		)	289			1,285
	Income tax provision (benefit)	$	18,556		$	(68,721	)	$	47,460
	Effective tax rate	114.3		%	(179.7		)%	42.5		%
Tax Effects of Significant Temporary Differences Creating Deferred Tax Assets and Liabilities	The tax effects of significant temporary differences creating deferred tax assets and liabilities at December 31 were:
	(In thousands)	2014			2013
	Deferred tax assets:
	Employee benefits	$	8,270		$	8,612
	Postretirement employee benefits	40,940			41,515
	Incentive compensation	9,354			8,937
	Inventories	6,716			5,898
	Pensions	7,238			152
	Federal and state credit carryforwards	23,759			27,597
	Net operating losses	3,192			13,930
	Other	9,384			7,390
	Total deferred tax assets	$	108,853		$	114,031
	Valuation allowance	(15,969		)	(13,622		)
	Deferred tax assets, net of valuation allowance	$	92,884		$	100,409
	Deferred tax liabilities:
	Plant and equipment	$	(178,531	)	$	(178,227	)
	Intangible assets	(4,227		)	(9,542		)
	Total deferred tax liabilities	(182,758		)	(187,769		)
	Net deferred tax liabilities	$	(89,874	)	$	(87,360	)
Tax Years Subject to Examination by Major Taxing Jurisdictions	Tax years subject to examination by major taxing jurisdictions are as follows:
	Jurisdiction	Years
	United States	2009 - 2014
	Canada	2011 - 2014
	Arkansas	2011 - 2014
	California	2010 - 2014
	Georgia	2010 - 2014
	Idaho	2011 - 2014
	Illinois	2008 - 2014
	Wisconsin	2010 - 2014
Tax Credits and Losses Subject to Expiration by Major Taxing Jurisdictions	Tax credits and losses subject to expiration by major taxing jurisdictions are as follows (dollars in thousands):
	Jurisdiction	Gross Values			Years
	United States
	Foreign tax credits	$	5,488		2016 - 2024
	Cellulosic biofuel credits	1,903			2015
	Other federal tax credits	927			2026 - 2033
	Connecticut tax losses	16,358			2018 - 2033
	Georgia tax losses	3,829			2027 - 2033
	Idaho tax credits	5,262			2014 - 2027
	North Carolina tax credits	17,974			2015 - 2017
	Oklahoma tax losses	45,805			2030 - 2033
Roll Forward of Unrecognized Tax Benefits and Associated Interest and Penalties Included in the Accrued Taxes line item in non-current liabilities	The following presents a roll forward of our unrecognized tax benefits and associated interest and penalties, as included in the Accrued taxes line item in non-current liabilities in our Consolidated Balance Sheets.
	(In thousands)	Gross			Interest			Total Gross
		Unrecognized			and			Unrecognized
		Tax Benefits,			Penalties			Tax Benefits
		Excluding
		Interest and
		Penalties
	Balance at January 1, 2013	$	72,004		$	6,695		$	78,699
	Decrease in prior year tax positions	(69,816		)	(5,397		)	(75,213		)
	Decrease due to settlements	(525		)	(777		)	(1,302		)
	Increase in current year tax positions	469			5			474
	Balance at December 31, 2013	$	2,132		$	526		$	2,658
	Decrease in prior year tax positions	(157		)	(301		)	(458		)
	Increase in current year tax positions	431			65			496
	Balance at December 31, 2014	$	2,406		$	290		$	2,696

Accounts_Payable_and_Accrued_L1

Accounts Payable and Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Accounts Payable and Accrued Liabilities [Abstract]
Accounts Payable and Accrued Liabilities	Accounts Payable and Accrued Liabilities
	(In thousands)	December 31, 2014		December 31, 2013
	Trade accounts payable	$	122,856	$	108,192
	Accrued wages, salaries and employee benefits	41,880		38,563
	Accrued interest	12,173		9,691
	Accrued discounts and allowances	10,026		6,410
	Accrued utilities	6,959		8,309
	Accrued taxes other than income taxes payable	5,622		6,322
	Other	16,310		13,161
		$	215,826	$	190,648

Other_LongTerm_Obligations_Tab

Other Long-Term Obligations (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure Other Long Term Obligations [Abstract]
Other Long-Term Obligations
	(In thousands)	December 31, 2014		December 31, 2013
	Long-term lease obligations, net of current portion	$	24,805	$	24,815
	Deferred compensation	14,609		14,149
	Deferred proceeds	12,360		11,205
	Other	5,082		2,773
		$	56,856	$	52,942

Reclassification_out_of_Accumu1

Reclassification out of Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	Accumulated other comprehensive loss at the balance sheet dates is comprised of the following:
	(In thousands)	Foreign Currency Translation Adjustments1			Pension and Other Post Retirement Employee Benefit Plan Adjustments			Total
	Balance at December 31, 2013	$	(874	)	$	(57,219	)	$	(58,093	)
	Other comprehensive income before reclassifications	—			4,773			4,773
	Amounts reclassified from accumulated other comprehensive loss	874			(18,417		)	(17,543		)
	Other comprehensive income, net of tax2	874			(13,644		)	(12,770		)
	Balance at December 31, 2014	$	—		$	(70,863	)	$	(70,863	)
	(In thousands)	Foreign Currency Translation Adjustments1			Pension and Other Post Retirement Employee Benefit Plan Adjustments			Total
	Balance at December 31, 2012	$	(874	)	$	(114,819	)	$	(115,693	)
	Other comprehensive income before reclassifications	—			9,468			9,468
	Amounts reclassified from accumulated other comprehensive loss	—			48,132			48,132
	Other comprehensive income, net of tax2	—			57,600			57,600
	Balance at December 31, 2013	$	(874	)	$	(57,219	)	$	(58,093	)
	1	This balance consists of unrealized foreign currency translation adjustments related to the operations of our former Canadian subsidiary before its functional currency was changed from Canadian dollars to U.S. dollars in 2012. As a result of the divestiture of our specialty business and mills, this balance was written-off and included in our net loss on divested assets.
	2	For the year ended December 31, 2014, net periodic costs associated with our pension and other postretirement employee benefit, or OPEB, plans included in other comprehensive loss and reclassified from accumulated other comprehensive loss, or AOCL, included $38.6 million of net loss on plan assets, $9.8 million of actuarial loss amortization, $8.4 million of prior service credit arising during the period and $2.0 million of prior service credit amortization, less total tax of $8.8 million. For the year ended December 31, 2013, net periodic costs associated with our pension and OPEB plans included in other comprehensive income and reclassified from AOCL included $83.6 million of net gain on plan assets, $14.8 million of actuarial loss amortization, $5.1 million of prior service costs arising during the period, $0.2 million of prior service credit amortization and $0.8 million of curtailments, less total tax of $36.3 million. These accumulated other comprehensive loss components are included in the computation of net periodic pension and OPEB costs in Note 13, “Savings, Pension and Other Postretirement Employee Benefit Plans.”

Savings_Pension_and_Other_Post1

Savings, Pension and Other Postretirement Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Changes in Benefit Obligation, Plan Assets and Funded Status for Company-Sponsored Benefit Plans	The changes in benefit obligation, plan assets and funded status for company-sponsored benefit plans as of December 31 are as follows:
		Pension Benefit Plans								Other Postretirement
										Employee Benefit Plans
	(In thousands)	2014				2013				2014				2013
	Benefit obligation at beginning of year	$	293,388			$	333,257			$	107,327			$	134,618
	Service cost	1,390				1,738				454				552
	Interest cost	14,825				13,375				4,565				4,730
	Plan changes	—				—				(8,384		)		5,106
	Actuarial losses (gains)	47,548				(36,859		)		7,039				(30,322		)
	Medicare Part D subsidies received	—				—				123				308
	Benefits paid	(19,150		)		(18,123		)		(6,409		)		(7,665		)
	Benefit obligation at end of year	338,001				293,388				104,715				107,327
	Fair value of plan assets at beginning of year	286,598				254,556				20				19
	Actual return on plan assets	36,157				34,779				—				1
	Employer contribution	17,450				15,386				—				—
	Benefits paid	(19,150		)		(18,123		)		—				—
	Fair value of plan assets at end of year	321,055				286,598				20				20
	Funded status at end of year	$	(16,946	)		$	(6,790	)		$	(104,695	)		$	(107,307	)
Schedule of Amounts Recognized in Balance Sheet	Amounts recognized in the Consolidated Balance Sheets:
		Pension Benefit Plans								Other Postretirement
										Employee Benefit Plans
	(In thousands)	2014				2013				2014				2013
	Noncurrent asset	$	4,738			$	4,488			$	—			$	—
	Current liabilities	(438		)		(364		)		(7,477		)		(8,414		)
	Noncurrent liabilities	(21,246		)		(10,914		)		(97,218		)		(98,893		)
	Net amount recognized	$	(16,946	)		$	(6,790	)		$	(104,695	)		$	(107,307	)
Amounts Recognized (Pre-tax) in Accumulated Other Comprehensive Loss	mounts recognized in Accumulated Other Comprehensive Loss as of December 31 consist of:
		Pension Benefit Plans								Other Postretirement
										Employee Benefit Plans
	(In thousands)	2014				2013				2014				2013
	Net loss (gain)	$	130,708			$	109,218			$	1,410			$	(5,915	)
	Prior service cost (credit)	103				308				(7,101		)		(896		)
	Net amount recognized	$	130,811			$	109,526			$	(5,691	)		$	(6,811	)
Certain Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets	Information as of December 31 for certain pension plans included above with accumulated benefit obligations in excess of plan assets were as follows:
	(In thousands)	2014				2013
	Projected benefit obligation	$	338,001			$	293,388
	Accumulated benefit obligation	338,001				293,388
	Fair value of plan assets	321,055				286,598
Pre-tax Components of Net Periodic Cost	Pre-tax components of net periodic cost and other amounts recognized in Other Comprehensive (Loss) Income for the years ended December 31 were as follows:
	Net Periodic Cost:
		Pension Benefit Plans												Other Postretirement
														Employee Benefit Plans
	(In thousands)	2014				2013				2012				2014				2013				2012
	Service cost	$	1,390			$	1,738			$	2,485			$	454			$	552			$	693
	Interest cost	14,825				13,375				14,693				4,565				4,730				5,815
	Expected return on plan assets	(20,196		)		(18,352		)		(19,685		)		—				—				—
	Amortization of prior service cost (credit)	205				337				634				(2,179		)		(502		)		(2,680		)
	Amortization of actuarial loss (gain)	10,097				14,840				12,085				(286		)		—				—
	Curtailments	—				769				477				—				—				—
	Net periodic cost	$	6,321			$	12,707			$	10,689			$	2,554			$	4,780			$	3,828
Other Amounts Recognized in Other Comprehensive Income (Loss)	Other amounts recognized in Other Comprehensive (Loss) Income:
		Pension Benefit Plans												Other Postretirement
														Employee Benefit Plans
	(In thousands)	2014				2013				2012				2014				2013				2012
	Net loss (gain)	$	31,587			$	(53,285	)		$	12,989			$	7,039			$	(30,323	)		$	3,150
	Curtailments	—				(769		)		(477		)		—				—				—
	Prior service (credit) cost	—				—				—				(8,384		)		5,106				(5,278		)
	Amortization of prior service (cost) credit	(205		)		(337		)		(634		)		2,179				502				2,680
	Amortization of actuarial (loss) gain	(10,097		)		(14,840		)		(12,085		)		286				—				—
	Total recognized in other comprehensive	$	21,285			$	(69,231	)		$	(207	)		$	1,120			$	(24,715	)		$	552
	loss (income)
	Total recognized in net periodic cost and	$	27,606			$	(56,524	)		$	10,482			$	3,674			$	(19,935	)		$	4,380
	other comprehensive loss (income)
Weighted Average Assumptions Used to Determine Benefit Obligation	Weighted average assumptions used to determine the benefit obligation as of December 31 were:
		Pension Benefit Plans									Other Postretirement
											Employee Benefit Plans
		2014			2013			2012			2014			2013			2012
	Discount rate	4.25	%		5.2	%		4.15	%		4.15	%		5.05	%		4.05	%
	Weighted average assumptions used to determine the net periodic cost for the years ended December 31 were:
		Pension Benefit Plans									Other Postretirement
											Employee Benefit Plans
		2014			2013			2012			2014			2013			2012
	Discount rate	5.2	%		4.15	%		4.9	%		5.05	%		4.05	%		4.95	%
	Expected return on plan assets	7.5			7.5			8			—			—			—
One Percentage Point Change in Health Care Cost Trend Rates	A one percentage point change in the health care cost trend rates would have the following effects:
	(In thousands)	1% Increase				1% Decrease
	Effect on total of service and interest cost components	$	493			$	(414	)
	Effect on postretirement employee benefit obligation	10,277				(8,657		)
Investments at Fair Value for Company Sponsored Pension Benefit Plans within Fair Value Hierarchy	The following tables set forth by level, within the fair value hierarchy, the investments at fair value for our company-sponsored pension benefit plans:
		31-Dec-14
	(In thousands)	Level 1				Level 2				Level 3				Total
	Cash and cash equivalents	$	2,023			$	—			$	—			$	2,023
	Common and collective trust:
	Collective investment funds	—				319,032				—				319,032
	Total investments at fair value	$	2,023			$	319,032			$	—			$	321,055
		December 31, 2013
	(In thousands)	Level 1				Level 2				Level 3				Total
	Cash and cash equivalents	$	4,314			$	—			$	—			$	4,314
	Common and collective trusts:
	International small cap	—				15,845				—				15,845
	Global/International equity	—				21,198				—				21,198
	International equity emerging markets	—				17,809				—				17,809
	Common stocks:
	Industrials	9,307				—				—				9,307
	Energy	2,663				—				—				2,663
	Consumer	8,002				—				—				8,002
	Healthcare	6,013				—				—				6,013
	Finance	11,566				—				—				11,566
	Utilities	1,711				—				—				1,711
	Information technology	8,785				—				—				8,785
	Foreign	6,175				—				—				6,175
	Mutual funds:
	Foreign large blend	18,492				—				—				18,492
	Long-term bond fund	137,031				—				—				137,031
	Mid-cap growth fund	18,009				—				—				18,009
	Subtotal	$	232,068			$	54,852			$	—			$	286,920
	Payable held under securities lending agreement													(322		)
	Total investments at fair value													$	286,598
Long Term Asset Allocation Ranges	Assets are diversified among various asset classes, such as domestic equities, international equities, fixed income and cash. The long-term asset allocation ranges are as follows:
	Domestic equities		14%-22%
	International equities, including emerging markets		13%-22%
	Corporate bonds		50%-70%
	Liquid reserves		0%-5%
Schedule of Expected Benefit Payments	Estimated future benefit payments are as follows for the years indicated:
	(In thousands)	Pension Benefit Plans				Other
						Postretirement
						Employee
						Benefit Plans
	2015	$	19,023			$	7,497
	2016	19,318				7,794
	2017	19,683				7,728
	2018	20,055				7,781
	2019	20,543				7,526
	2020-2023	104,772				31,412
Multiemployer Defined Benefit Plans
	Pension	EIN		Plan		PPA Zone Status				FIP/RP Status Pending/		Contributions (in thousands)												Surcharge	Expiration
	Fund			Number						Implemented														Imposed	Date
																									of Collective
																									Bargaining
						2014		2013				2014				2013				2012					Agreement 1
	IAM NPF	51-6031295		2		Green		Green		N/A		$	343			$	343			$	288			No	5/31/16
	PIUMPF	11-6166763		1		Red		Red		Implemented		5,665				5,718				5,673				No	8/31/14
									Total Contributions:			$	6,008			$	6,061			$	5,961

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted Net Earnings per Share	The following table reconciles the number of common shares used in calculating the basic and diluted net earnings per share:
		2014			2013		2012
	Basic average common shares outstanding1	20,129,557			22,081,026		23,298,663
	Incremental shares due to:
	Restricted stock units	—			53,803		24,086
	Performance shares	—			129,003		291,036
	Stock options	—			—		—
	Diluted average common shares outstanding	20,129,557			22,263,832		23,613,785
	Basic net (loss) earnings per common share	$	(0.11	)	$	4.84	$	2.75
	Diluted net (loss) earnings per common share	(0.11		)	4.8		2.72
	Anti-dilutive shares excluded from calculation	566,041			41,337		9,992

EquityBased_Compensation_Plans1

Equity-Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Equity-Based Compensation Expense	Employee equity-based compensation expense was recognized as follows:
	(In thousands)		2014			2013			2012
	Restricted stock units		$	1,966		$	1,801		$	970
	Performance shares		4,964			5,075			7,364
	Stock options		1,254			—			—
	Total employee equity-based compensation		$	8,184		$	6,876		$	8,334
	Related tax benefit		$	2,955		$	2,049		$	2,886
Summary of Status of Outstanding RSU Awards	A summary of the status of outstanding unvested RSU awards as of December 31, 2014, 2013 and 2012, and changes during those years, is presented below:
			2014					2013					2012
			Shares		Weighted			Shares			Weighted		Shares		Weighted
					Average						Average				Average
					Grant Date						Grant Date				Grant Date
					Fair Value						Fair Value				Fair Value
	Unvested shares outstanding at
	1-Jan		102,658		$	39.85		63,727			$	35.57	169,344		$	11.33
	Granted		31,567		66.33			72,702			43.44		52,294		34.59
	Vested		(32,117	)	38.94			(30,190	)		39.21		(155,177	)	8.82
	Forfeited		(8,854	)	52.28			(3,581	)		42.03		(2,734	)	34.07
	Unvested shares outstanding at		93,254		47.95			102,658			39.85		63,727		35.57
	December 31
	Aggregate intrinsic value (in				$	6,393					$	5,390			$	2,496
	thousands)
Schedule of Share-based Compensation, Activity [Table Text Block]	A summary of the status of outstanding stock option awards as of December 31, 2014, and changes during the year, is presented below:
			2014
			Shares		Weighted
					Average
					Grant Date
					Fair Value
	Outstanding options at January 1		—		$	—
	Granted		163,137		66.85
	Forfeited		(12,557	)	66.97
	Outstanding options at December 31		150,580		66.84
	Aggregate intrinsic value (in thousands)				$	258
Assumption Used in Black-Scholes Option-Pricing Model to Estimate Fair Value of Stock Options	The fair value of performance share awards is estimated using a Monte Carlo simulation model. For performance shares granted in 2014, the following assumptions were used in our Monte Carlo model:
	Closing price of stock on date of grant	$	66.97
	Risk free rate	0.66		%
	Measurement period	3 years
	Volatility	30		%
	The weighted-average fair value of stock options granted in 2014 on the grant date was estimated at $22.99 per option based on the following assumptions:
	Volatility	30	%
	Risk-free interest rate	2.05	%
	Expected life-years	6.4
Summary of Status of Outstanding Performance Share Awards	A summary of the status of outstanding performance share awards as of December 31, 2014, 2013 and 2012, and changes during those years, is presented below:
			2014					2013					2012
			Shares		Weighted			Shares			Weighted		Shares		Weighted
					Average						Average				Average
					Grant Date						Grant Date				Grant Date
					Fair Value						Fair Value				Fair Value
	Outstanding share awards at		259,841		$	50.87		392,655			$	44.67	749,538		$	19.52
	January 1
	Granted		54,379		105.08			124,513			63.46		150,865		40.24
	Settled		—		—			(246,592	)		47.19		(499,680	)	5.65
	Forfeited		(13,356	)	71.03			(10,735	)		54.87		(8,068	)	42.15
	Outstanding share awards at		300,864		59.77			259,841			50.87		392,655		44.67
	December 31
	Aggregate intrinsic value (in				$	20,624					$	13,642			$	15,376
	thousands)

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Estimated Fair Values of Financial Instruments	The estimated fair values of our financial instruments as of our balance sheet dates are presented below:
		December 31, 2014				December 31, 2013
	(In thousands)	Carrying		Fair		Carrying		Fair
		Amount		Value		Amount		Value
	Cash, short-term investments and restricted cash (Level 1)	$	81,101	$	81,101	$	95,206	$	95,206
	Long-term debt (Level 1)	575,000		558,000		650,000		651,313

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Additional information [Abstract]
Future Minimum Commitments For Capital And Operating Leases	As of December 31, 2014, under current operating and capital lease contracts, we had future minimum lease payments as follows:
	(In thousands)	Capital			Operating
	2015	$	2,530		$	14,588
	2016	2,576			11,899
	2017	2,623			9,669
	2018	2,670			6,351
	2019	2,697			3,293
	Thereafter	32,193			7,503
	Total future minimum lease payments	$	45,289		$	53,303
	Less interest portion	(21,238		)
	Present value of future minimum lease payments	$	24,051

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Reportable Segments Information	The following is a tabular presentation of business segment information for each of the past three years. Corporate information is included to reconcile segment data to the financial statements.
	(In thousands)	2014			2013			2012
	Segment net sales1:
	Consumer Products	$	1,183,385		$	1,149,692		$	1,134,556
	Pulp and Paperboard	783,754			740,138			739,748
	Total segment net sales	$	1,967,139		$	1,889,830		$	1,874,304
	Operating income:
	Consumer Products	$	34,131		$	52,799		$	93,347
	Loss on divested assets2	(40,159		)	—			—
	Pulp and Paperboard	144,171			95,781			103,910
		138,143			148,580			197,257
	Corporate	(58,332		)	(49,252		)	(51,870		)
	Income from operations	$	79,811		$	99,328		$	145,387
	Depreciation and amortization:
	Consumer Products	$	61,504		$	65,197		$	54,547
	Pulp and Paperboard	25,452			23,266			23,113
	Corporate	3,189			1,809			1,673
	Total depreciation and amortization	$	90,145		$	90,272		$	79,333
	Assets:
	Consumer Products	$	1,037,912		$	1,215,919		$	1,178,438
	Pulp and Paperboard	413,143			359,735			344,614
		1,451,055			1,575,654			1,523,052
	Corporate	134,873			169,171			110,404
	Total assets	$	1,585,928		$	1,744,825		$	1,633,456
	Capital expenditures:
	Consumer Products	$	43,562		$	46,647		$	183,330
	Pulp and Paperboard	45,146			30,846			19,954
		88,708			77,493			203,284
	Corporate	10,892			9,015			3,831
	Total capital expenditures	$	99,600		$	86,508		$	207,115
	1
Summary of Geographic Information Regarding Net Sales	Geographic information regarding our net sales is summarized as follows:
	(In thousands)	2014			2013			2012
	United States	$	1,840,726		$	1,751,001		$	1,726,561
	Japan	63,831			67,728			63,368
	Canada	25,411			26,161			29,557
	Korea	11,105			10,899			9,655
	Australia	7,219			7,924			7,786
	Mexico	3,385			2,964			6,102
	Taiwan	2,000			1,755			11,061
	China	1,876			5,404			3,488
	Other foreign countries	11,586			15,994			16,726
	Total net sales	$	1,967,139		$	1,889,830		$	1,874,304

Financial_Results_by_Quarter_F

Financial Results by Quarter Financial Results by Quarter (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Financial Results by Quarter	Financial Results by Quarter (Unaudited)
		Three Months Ended
	(In thousands—	March 31						June 30						September 30						December 31
	except per-share
	amounts)	2014			2013			2014			2013			2014			2013			2014			2013
	Net sales	$	484,920		$	460,824		$	498,759		$	471,002		$	511,142		$	487,845		$	472,318		$	470,159
	Costs and
	expenses:
	Cost of sales	(426,629		)	(414,209		)	(434,111		)	(414,521		)	(434,457		)	(441,237		)	(413,643		)	(401,404		)
	Selling, general and	(33,514		)	(34,132		)	(31,565		)	(26,767		)	(31,817		)	(27,766		)	(33,206		)	(30,466		)
	administrative
	expenses
	Loss on divested	—			—			—			—			—			—			(40,159		)	—
	assets
	Impairment of	(4,259		)	—			—			—			(890		)	—			(3,078		)	—
	assets
	Total operating	(464,402		)	(448,341		)	(465,676		)	(441,288		)	(467,164		)	(469,003		)	(490,086		)	(431,870		)
	costs and
	expenses
	Income (loss) from	20,518			12,483			33,083			29,714			43,978			18,842			(17,768		)	38,289
	operations
	Net earnings (loss)	$	6,226		$	(882	)	$	12,453		$	11,658		$	6,253		$	13,317		$	(27,247	)	$	82,862
	Net earnings (loss)
	per common share
	Basic	$	0.3		$	(0.04	)	$	0.61		$	0.52		$	0.32		$	0.6		$	(1.39	)	$	3.91
	Diluted	0.29			(0.04		)	0.61			0.52			0.31			0.6			(1.39		)	3.87

Supplemental_Guarantor_Financi1

Supplemental Guarantor Financial Information (Tables)	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)	Clearwater Paper Corporation
	Consolidating Statement of Operations and Comprehensive Income (Loss)
	Twelve Months Ended December 31, 2014
					Guarantor			Non-Guarantor
	(In thousands)	Issuer			Subsidiaries			Subsidiaries			Eliminations			Total
	Net sales	$	1,573,912		$	531,520		$	43,929		$	(182,222	)	$	1,967,139
	Cost and expenses:
	Cost of sales	(1,321,143		)	(526,192		)	(43,727		)	182,222			(1,708,840		)
	Selling, general and administrative expenses	(107,141		)	(22,747		)	(214		)	—			(130,102		)
	Loss on divested assets	—			(40,159		)	—			—			(40,159		)
	Impairment of assets	—			(8,227		)	—			—			(8,227		)
	Total operating costs and expenses	(1,428,284		)	(597,325		)	(43,941		)	182,222			(1,887,328		)
	Income (loss) from operations	145,628			(65,805		)	(12		)	—			79,811
	Interest expense, net	(39,091		)	(59		)	—			—			(39,150		)
	Debt retirement costs	(24,420		)	—			—			—			(24,420		)
	Earnings (loss) before income taxes	82,117			(65,864		)	(12		)	—			16,241
	Income tax (provision) benefit	(47,694		)	7,439			(516		)	22,215			(18,556		)
	Equity in loss of subsidiary	(58,953		)	(528		)	—			59,481			—
	Net (loss) earnings	$	(24,530	)	$	(58,953	)	$	(528	)	$	81,696		$	(2,315	)
	Other comprehensive loss, net of tax	(12,770		)	—			—			—			(12,770		)
	Comprehensive loss	$	(37,300	)	$	(58,953	)	$	(528	)	$	81,696		$	(15,085	)
	Clearwater Paper Corporation
	Consolidating Statement of Operations and Comprehensive Income (Loss)
	Twelve Months Ended December 31, 2013
					Guarantor			Non-Guarantor
	(In thousands)	Issuer			Subsidiaries			Subsidiaries			Eliminations			Total
	Net sales	$	1,474,103		$	565,783		$	54,978		$	(205,034	)	$	1,889,830
	Cost and expenses:
	Cost of sales	(1,269,107		)	(553,006		)	(54,292		)	205,034			(1,671,371		)
	Selling, general and administrative expenses	(94,861		)	(22,918		)	(1,352		)	—			(119,131		)
	Total operating costs and expenses	(1,363,968		)	(575,924		)	(55,644		)	205,034			(1,790,502		)
	Income (loss) from operations	110,135			(10,141		)	(666		)	—			99,328
	Interest expense, net	(44,031		)	(5		)	—			—			(44,036		)
	Debt retirement costs	(17,058		)	—			—			—			(17,058		)
	Earnings (loss) before income taxes	49,046			(10,146		)	(666		)	—			38,234
	Income tax benefit (provision)	61,778			(4,420		)	(138		)	11,501			68,721
	Equity in loss of subsidiary	(15,370		)	(804		)	—			16,174			—
	Net earnings (loss)	$	95,454		$	(15,370	)	$	(804	)	$	27,675		$	106,955
	Other comprehensive income, net of tax	57,600			—			—			—			57,600
	Comprehensive income (loss)	$	153,054		$	(15,370	)	$	(804	)	$	27,675		$	164,555
	Clearwater Paper Corporation
	Consolidating Statement of Operations and Comprehensive Income (Loss)
	Twelve Months Ended December 31, 2012
					Guarantor			Non-Guarantor
	(In thousands)	Issuer			Subsidiaries			Subsidiaries			Eliminations			Total
	Net sales	$	1,404,467		$	539,570		$	59,442		$	(129,175	)	$	1,874,304
	Cost and expenses:
	Cost of sales	(1,178,148		)	(501,879		)	(57,020		)	129,175			(1,607,872		)
	Selling, general and administrative expenses	(96,668		)	(22,268		)	(2,109		)	—			(121,045		)
	Total operating costs and expenses	(1,274,816		)	(524,147		)	(59,129		)	129,175			(1,728,917		)
	Income from operations	129,651			15,423			313			—			145,387
	Interest expense, net	(33,796		)	—			—			—			(33,796		)
	Earnings before income taxes	95,855			15,423			313			—			111,591
	Income tax provision	(42,440		)	(14,362		)	(35		)	9,377			(47,460		)
	Equity in income of subsidiary	1,339			278			—			(1,617		)	—
	Net earnings	$	54,754		$	1,339		$	278		$	7,760		$	64,131
	Other comprehensive loss, net of tax	(428		)	—			—			—			(428		)
	Comprehensive income	$	54,326		$	1,339		$	278		$	7,760		$	63,703
Condensed Consolidating Balance Sheet	Clearwater Paper Corporation
	Consolidating Balance Sheet
	At December 31, 2014
	(In thousands)	Issuer			Guarantor			Non-Guarantor			Eliminations			Total
					Subsidiaries			Subsidiaries
	ASSETS
	Current assets:
	Cash	$	27,331		$	—		$	—		$	—		$	27,331
	Restricted cash	1,500			—			—			—			1,500
	Short-term investments	50,000			—			—			—			50,000
	Receivables, net	117,970			16,557			—			(613		)	133,914
	Taxes receivable	6,760			(15,758		)	—			10,253			1,255
	Inventories	246,210			40,416			—			—			286,626
	Deferred tax assets	14,733			5,206			—			1,821			21,760
	Prepaid expenses	3,734			457			—			—			4,191
	Total current assets	468,238			46,878			—			11,461			526,577
	Property, plant and equipment, net	657,369			153,618			—			—			810,987
	Goodwill	209,087						—			—			209,087
	Intangible assets, net	5,224			19,732			—			—			24,956
	Intercompany receivable (payable)	33,703			(21,629		)	—			(12,074		)	—
	Investment in subsidiary	137,282			—			—			(137,282		)	—
	Pension assets	4,738			—			—			—			4,738
	Other assets, net	8,496			1,087			—			—			9,583
	TOTAL ASSETS	$	1,524,137		$	199,686		$	—		$	(137,895	)	$	1,585,928
	LIABILITIES AND STOCKHOLDERS’
	EQUITY
	Current liabilities:
	Accounts payable and accrued	$	193,326		$	23,113		$	—		$	(613	)	$	215,826
	liabilities
	Current liability for pensions and	7,915			—			—			—			7,915
	other postretirement employee
	benefits
	Total current liabilities	201,241			23,113			—			(613		)	223,741
	Long-term debt	575,000			—			—			—			575,000
	Liability for pensions and other	118,464			—			—			—			118,464
	postretirement employee benefits
	Other long-term obligations	56,029			827			—			—			56,856
	Accrued taxes	1,902			794			—			—			2,696
	Deferred tax liabilities	73,964			37,670			—			—			111,634
	Accumulated other comprehensive loss,	(70,863		)	—			—			—			(70,863		)
	net of tax
	Stockholders’ equity excluding	568,400			137,282			—			(137,282		)	568,400
	accumulated other comprehensive loss
	TOTAL LIABILITIES AND	$	1,524,137		$	199,686		$	—		$	(137,895	)	$	1,585,928
	STOCKHOLDERS’ EQUITY
	Clearwater Paper Corporation
	Consolidating Balance Sheet
	At December 31, 2013
	(In thousands)	Issuer			Guarantor			Non-Guarantor			Eliminations			Total
					Subsidiaries			Subsidiaries
	ASSETS
	Current assets:
	Cash	$	18,273		$	—		$	5,402		$	—		$	23,675
	Restricted cash	1,500			—			—			—			1,500
	Short-term investments	70,000			—			—			—			70,000
	Receivables, net	119,278			38,063			2,700			(1,167		)	158,874
	Taxes receivable	3,709			(15,882		)	324			22,352			10,503
	Inventories	198,476			65,017			4,295			—			267,788
	Deferred tax assets	42,289			6,094			5			(10,850		)	37,538
	Prepaid expenses	4,704			695			124			—			5,523
	Total current assets	458,229			93,987			12,850			10,335			575,401
	Property, plant and equipment, net	636,662			231,225			16,811			—			884,698
	Goodwill	229,533			—			—			—			229,533
	Intangible assets, net	—			39,619			1,159			—			40,778
Intercompany receivable (payable)	91,865			(63,932		)	(16,431		)	(11,502		)	—
Investment in subsidiary	196,763			5,575			—			(202,338		)	—
Pension assets	4,488			—			—			—			4,488
Other assets, net	8,772			1,155			—			—			9,927
TOTAL ASSETS	$	1,626,312		$	307,629		$	14,389		$	(203,505	)	$	1,744,825
LIABILITIES AND STOCKHOLDERS’
EQUITY
Current liabilities:
Accounts payable and accrued	$	140,125		$	45,736		$	5,954		$	(1,167	)	$	190,648
liabilities
Current liability for pensions and	8,778			—			—			—			8,778
other postretirement employee
benefits
Total current liabilities	148,903			45,736			5,954			(1,167		)	199,426
Long-term debt	650,000			—			—			—			650,000
Liability for pensions and other	109,807			—			—			—			109,807
postretirement employee benefits
Other long-term obligations	51,740			1,202			—			—			52,942
Accrued taxes	1,430			911			317			—			2,658
Deferred tax liabilities	59,338			63,017			2,543			—			124,898
Accumulated other comprehensive loss,	(58,093		)	—			—			—			(58,093		)
net of tax
Stockholders’ equity excluding	663,187			196,763			5,575			(202,338		)	663,187
accumulated other comprehensive loss
TOTAL LIABILITIES AND	$	1,626,312		$	307,629		$	14,389		$	(203,505	)	$	1,744,825
STOCKHOLDERS’ EQUITY
Condensed Consolidating Statement of Cash Flows	Clearwater Paper Corporation
	Consolidating Statement of Cash Flows
	Twelve Months Ended December 31, 2014
	(In thousands)	Issuer			Guarantor			Non-Guarantor			Eliminations			Total
					Subsidiaries			Subsidiaries
	CASH FLOWS FROM OPERATING
	ACTIVITIES
	Net loss	$	(24,530	)	$	(58,953	)	$	(528	)	$	81,696		$	(2,315	)
	Adjustments to reconcile net loss to net cash
	flows from operating activities:
	Depreciation and amortization	59,373			28,468			2,304			—			90,145
	Equity-based compensation expense	12,790			—			—			—			12,790
	Impairment of assets	—			8,227			—			—			8,227
	Deferred tax provision (benefit)	50,943			(21,921		)	(2,538		)	(12,671		)	13,813
	Employee benefit plans	2,115			—			—			—			2,115
	Deferred issuance costs and discounts	6,141			—			—			—			6,141
	on long-term debt
	Loss on divestiture of assets	—			29,059			—			—			29,059
	Disposal of plant and equipment, net	471			488			—			—			959
	Non-cash adjustments to unrecognized	472			(117		)	(317		)	—			38
	taxes
	Changes in working capital, net	(8,162		)	(4,711		)	625			—			(12,248		)
	Change in taxes receivable, net	(3,051		)	79			121			12,099			9,248
	Excess tax benefits from equity-based	(864		)	—			—			—			(864		)
	payment arrangements
	Change in non-current accrued taxes, net	—			290			—			—			290
	Funding of qualified pension plans	(16,955		)	—			—			—			(16,955		)
	Other, net	(636		)	(707		)	—			—			(1,343		)
	Net cash flows from operating activities	78,107			(19,798		)	(333		)	81,124			139,100
	CASH FLOWS FROM INVESTING
	ACTIVITIES
	Change in short-term investments, net	20,000			—			—			—			20,000
	Additions to plant and equipment	(73,223		)	(19,450		)	(355		)	—			(93,028		)
	Net proceeds from divested assets	107,740			—			—			—			107,740
	Proceeds from the sale of assets	38			937			—			—			975
	Net cash flows from investing activities	54,555			(18,513		)	(355		)	—			35,687
	CASH FLOWS FROM FINANCING
	ACTIVITIES
	Proceeds from long-term debt	300,000			—			—			—			300,000
	Repayment of long-term debt	(375,000		)	—			—			—			(375,000		)
	Purchase of treasury stock	(100,000		)	—			—			—			(100,000		)
	Investment from (to) parent	47,527			38,311			(4,714		)	(81,124		)	—
	Payments for long-term debt issuance costs	(3,002		)	—			—			—			(3,002		)
	Payment of tax withholdings on equity-	(1,523		)	—			—			—			(1,523		)
	based payment arrangements
	Excess tax benefits from equity-based	864			—			—			—			864
	payment arrangements
	Other, net	7,530			—			—			—			7,530
	Net cash flows from financing activities	(123,604		)	38,311			(4,714		)	(81,124		)	(171,131		)
	Increase (decrease) in cash	9,058			—			(5,402		)	—			3,656
	Cash at beginning of period	18,273			—			5,402			—			23,675
	Cash at end of period	$	27,331		$	—		$	—		$	—		$	27,331
	Clearwater Paper Corporation
	Consolidating Statement of Cash Flows
	Twelve Months Ended December 31, 2013
	(In thousands)	Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
	CASH FLOWS FROM OPERATING
	ACTIVITIES
	Net earnings (loss)	$	95,454		$	(15,370	)	$	(804	)	$	27,675		$	106,955
	Adjustments to reconcile net earnings (loss) to
	net cash flows from operating activities:
	Depreciation and amortization	54,291			33,712			2,269			—			90,272
	Equity-based compensation expense	10,960			—			—			—			10,960
	Deferred tax provision (benefit)	3,185			(9,072		)	(125		)	11,641			5,629
Employee benefit plans	10,131			—			—			—			10,131
Deferred issuance costs and discounts	4,964			—			—			—			4,964
on long-term debt
Disposal of plant and equipment, net	201			1,291			1			—			1,493
Non-cash adjustments to unrecognized	(75,308		)	—			—			—			(75,308		)
taxes
Changes in working capital, net	(31,256		)	11,747			4,487			—			(15,022		)
Change in taxes receivable, net	17,003			15,998			(324		)	(22,352		)	10,325
Change in non-current accrued taxes, net	1,423			(860		)	6			—			569
Funding of qualified pension plans	(15,050		)	—			—			—			(15,050		)
Other, net	(452		)	891			—			—			439
Net cash flows from operating activities	75,546			38,337			5,510			16,964			136,357
CASH FLOWS FROM INVESTING
ACTIVITIES
Change in short-term investments, net	(50,000		)	—			—			—			(50,000		)
Additions to plant and equipment	(65,708		)	(22,562		)	(2,323		)	—			(90,593		)
Net cash flows from investing activities	(115,708		)	(22,562		)	(2,323		)	—			(140,593		)
CASH FLOWS FROM FINANCING
ACTIVITIES
Proceeds from long-term debt	275,000			—			—			—			275,000
Repayment of long-term debt	(150,000		)	—			—			—			(150,000		)
Purchase of treasury stock	(100,000		)	—			—			—			(100,000		)
Investment from (to) parent	31,998			(15,780		)	746			(16,964		)	—
Payments for long-term debt issuance costs	(4,837		)	—			—			—			(4,837		)
Payment of tax withholdings on	(4,831		)	—			—			—			(4,831		)
equity-based payment arrangements
Net cash flows from financing activities	47,330			(15,780		)	746			(16,964		)	15,332
Increase (decrease) in cash	7,168			(5		)	3,933			—			11,096
Cash at beginning of period	11,105			5			1,469			—			12,579
Cash at end of period	$	18,273		$	—		$	5,402		$	—		$	23,675

Nature_of_Operations_and_Basis1

Nature of Operations and Basis of Presentation - Additional Information (Detail) (USD $)	12 Months Ended			22 Months Ended	10 Months Ended	0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2014	Dec. 28, 2012
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Proceeds from divested assets	$107,740,000	$0	$0
Thomaston, Georgia Facility [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Other Nonrecurring Expense, Planned Permaent Facility Closure	1,300,000			7,200,000
Long Island, New York Facility [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Other Nonrecurring Expense, Planned Permaent Facility Closure					18,800,000
Chipping Facility Acquisition [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Business acquisition cash paid						11,000,000
Chipping Facility Acquisition [Member] | Customer relationships
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						4,000,000
Chipping Facility Acquisition [Member] | Non-compete agreements
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						1,000,000
Chipping Facility Acquisition [Member] | Equipment [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment						6,000,000
Chipping Facility Acquisition [Member] | Restricted Cash, Non-Current [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High						$1,500,000

Summary_of_Significant_Accouti2

Summary of Significant Accouting Policies Additional Information (Details) (USD $)

3 Months Ended

12 Months Ended

8 Months Ended

6 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

Sep. 30, 2014

Sep. 16, 2013

Dec. 15, 2014

Feb. 05, 2014

Jan. 17, 2013

Dec. 27, 2010

Property, Plant and Equipment [Line Items]

Restricted cash

$1,500,000

$1,500,000

$1,500,000

$1,500,000

Allowance for doubtful accounts

1,400,000

1,900,000

1,400,000

1,900,000

Provision for doubtful accounts

100,000

1,500,000

200,000

Goodwill

209,087,000

229,533,000

209,087,000

229,533,000

Net sales

472,318,000

511,142,000

498,759,000

484,920,000

470,159,000

487,845,000

471,002,000

460,824,000

1,967,139,000

[1]

1,889,830,000

[1]

1,874,304,000

[1]

Percentage of expected natural gas requirement covered under contract for next fiscal year

57.00%

57.00%

Percentage Of Expected Natural Gas Requirement Covered Under Contract For Next Fiscal Quarter

67.00%

67.00%

Percentage of natural gas requirement covered under contract

58.00%

16.00%

29.00%

Common Stock

Property, Plant and Equipment [Line Items]

Common stock authorized (in shares)

100,000,000

100,000,000

100,000,000

Common Stock | Open Market Share Repurchase [Member]

Property, Plant and Equipment [Line Items]

Common stock authorized (in shares)

50,000,000

50,000,000

Number of shares repurchased (in shares)

1,030,657

1,574,748

Treasury Stock Acquired, Average Cost Per Share (in dollars per share)

$48.51

$63.50

Common Stock | Accelerated Share Buyback Agreement [Member]

Property, Plant and Equipment [Line Items]

Number of shares repurchased (in shares)

1,039,513

Treasury Stock Acquired, Average Cost Per Share (in dollars per share)

$48.10

Consumer Products

Property, Plant and Equipment [Line Items]

Net sales

1,183,385,000

[1]

1,149,692,000

[1]

1,134,556,000

[1]

Kroger Company | Consumer Products

Property, Plant and Equipment [Line Items]

Net sales

204,000,000

Kroger Company | Consumer Products | Sales Revenue, Net [Member]

Property, Plant and Equipment [Line Items]

Percentage of total revenue from single customer

10.80%

Cellu Tissue Holdings Inc

Property, Plant and Equipment [Line Items]

Goodwill

229,500,000

Land Improvements | Minimum

Property, Plant and Equipment [Line Items]

Estimated useful life

10 years

Land Improvements | Maximum

Property, Plant and Equipment [Line Items]

Estimated useful life

40 years

Building and Building Improvements | Minimum

Property, Plant and Equipment [Line Items]

Estimated useful life

10 years

Building and Building Improvements | Maximum

Property, Plant and Equipment [Line Items]

Estimated useful life

40 years

Machinery and Equipment | Minimum

Property, Plant and Equipment [Line Items]

Estimated useful life

5 years

Machinery and Equipment | Maximum

Property, Plant and Equipment [Line Items]

Estimated useful life

25 years

Office And Other Equipment | Minimum

Property, Plant and Equipment [Line Items]

Estimated useful life

2 years

Office And Other Equipment | Maximum

Property, Plant and Equipment [Line Items]

Estimated useful life

15 years

Other Assets

Property, Plant and Equipment [Line Items]

Restricted Cash and Cash Equivalents, Noncurrent

$2,300,000

$2,300,000

[1]

1 In 2013 and 2012, pulp not utilized internally was sold by the Pulp and Paperboard segment to external customers resulting in net sales of $5.8 million and $9.0 million respectively. Commencing in 2014, the majority of excess pulp is sold by the Consumer Products segment and totaled $2.1 million.

Asset_Divestiture_Details

Asset Divestiture (Details) (USD $)	0 Months Ended		3 Months Ended								12 Months Ended
	Dec. 31, 2014		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	Dec. 30, 2014
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]
Proceeds from divested assets											$107,740,000	$0	$0
Loss on divested assets	-40,159,000	[1]	-40,159,000	0	0	0	0	0	0	0	-40,159,000	0	0
Goodwill, Written off Related to Asset Divestiture	20,400,000
Finite-Lived Intangible Assets, Written off Related to Assets Divested	4,900,000
Disposal Group, Including Discontinued Operation, Assets														105,700,000
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment														86,700,000
Disposal Group, Including Discontinued Operation, Inventory														18,000,000
Disposal Group, Additional Consideration	6,000,000
Restricted Cash and Cash Equivalents	3,800,000		3,800,000								3,800,000
Consumer Products
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]
Loss on divested assets	($40,159,000)
[1]	2 These costs relate to the sale of our Consumer Products segment’s specialty business and mills. For additional discussion, see Note 4, “Divested Assets”

Inventories_Detail

Inventories (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]
Pulp, paperboard and tissue products	$188,760	$182,715
Materials and supplies	74,916	69,836
Logs, pulpwood, chips and sawdust	22,950	15,237
Inventories	$286,626	$267,788

Property_Plant_and_Equipment_D

Property, Plant and Equipment (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Machinery and equipment	$1,830,245	$1,937,914
Buildings and improvements	311,468	304,971
Land improvements	46,652	54,277
Office and other equipment	21,832	11,951
Land	7,221	11,827
Construction in progress	43,668	40,204
Property, plant and equipment, gross, total	2,261,086	2,361,144
Less accumulated depreciation and amortization	-1,450,099	-1,476,446
Property, plant and equipment, net	$810,987	$884,698

Property_Plant_and_Equipment_A

Property, Plant and Equipment Additional Information (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 30, 2014
Property, Plant and Equipment [Line Items]
Depreciation	$83.60	$83.30	$74.60
Interest expense, capitalized			12.6
Impairment of Long-Lived Assets Held-for-use	3.8
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment				86.7
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Capital leased assets, gross	$24.60	$24.10

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets Additional Information (Details) (USD $)	0 Months Ended	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Goodwill, Written off Related to Asset Divestiture	$20.40
Finite-Lived Intangible Assets, Written off Related to Assets Divested	4.9
Impairment of Intangible Assets, Finite-lived		$3.10	$1.30
Non-compete agreements
Useful Life				5 years
Minimum | Non-compete agreements
Useful Life					2 years 6 months
Maximum | Non-compete agreements
Useful Life					5 years

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Historical Cost	$45,476	$60,931
Accumulated Amortization	-20,520	-20,153
Net Balance	24,956	40,778
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	9 years 0 months	9 years 0 months
Historical Cost	41,001	53,957
Accumulated Amortization	-18,223	-17,234
Net Balance	22,778	36,723
Trade names and trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	10 years 0 months	10 years 0 months
Historical Cost	3,286	5,300
Accumulated Amortization	-1,314	-1,590
Net Balance	1,972	3,710
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	5 years
Historical Cost	1,189	1,674
Accumulated Amortization	-983	-1,329
Net Balance	$206	$345
Minimum | Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life		2 years 6 months
Maximum | Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life		5 years

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets Estimated Future Amortization Expense Related to Intangible Assets (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]
2015	$4,967
2016	4,946
2017	4,946
2018	4,884
2019	4,884
Thereafter	329
Net Balance	$24,956	$40,778

Earnings_Loss_Before_Income_Ta

Earnings (Loss) Before Income Taxes Composition in Each Tax Jurisdiction (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings (Loss) Before Income Taxes Composition in Each Tax Jurisdiction [Abstract]
United States	$16,253	$38,900	$111,278
Canada	-12	-666	313
Earnings before income taxes	$16,241	$38,234	$111,591

Provision_Benefit_for_Income_T

Provision (Benefit) for Income Taxes (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current
Federal	$2,355	($75,119)	$27,724
State	1,872	506	6,637
Foreign	516	263	229
Current Income Tax Expense (Benefit)	4,743	-74,350	34,590
Deferred
Federal	11,432	10,177	16,243
State	2,381	-4,423	-3,180
Foreign	0	-125	-193
Deferred tax expense	13,813	5,629	12,870
Income tax provision	$18,556	($68,721)	$47,460

Income_Tax_Reconciliation_Deta

Income Tax Reconciliation (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Computed expected tax provision		$5,685	$13,381	$39,063
State and local taxes, net of federal income tax impact		1,543	1,279	4,398
Adjustment for state deferred tax rate		1,546	-762	-742
State investment tax credits		-1,039	-2,263	-9,077
Federal credits and net operating losses	1,500	-485	-10,234	4,121
Federal manufacturing deduction		-674	0	-3,288
Uncertain tax positions		355	-69,144	4,801
Loss on divested assets		10,554	0	0
State attribute true up		-2,874	0	0
Effective Income Tax Rate Reconciliation, Adjustment for New York State Attribute True Up, Amount		1,654	0	0
Change in valuation allowances		2,346	-1,334	6,932
U.S. tax provision on foreign operations		0	67	-33
Other		-55	289	1,285
Income tax provision		$18,556	($68,721)	$47,460
Effective tax rate		114.30%	-179.70%	42.50%

Tax_Effects_of_Significant_Tem

Tax Effects of Significant Temporary Differences Creating Deferred Tax Assets and Liabilities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred tax assets:
Employee benefits	$8,270	$8,612
Postretirement employee benefits	40,940	41,515
Incentive compensation	9,354	8,937
Inventories	6,716	5,898
Pensions	7,238	152
Federal and state credit carryforwards	23,759	27,597
Net operating losses	3,192	13,930
Other	9,384	7,390
Total deferred tax assets	108,853	114,031
Valuation allowance	-15,969	-13,622
Deferred tax assets, net of valuation allowance	92,884	100,409
Deferred tax liabilities:
Plant and equipment	-178,531	-178,227
Intangible assets	-4,227	-9,542
Deferred Tax Liabilities, Gross	182,758	187,769
Total deferred tax liabilities	($89,874)	($87,360)

Net_Deferred_Tax_Assets_Liabil

Net Deferred Tax Assets (Liabilities) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Disclosure Net Deferred Tax Assets Liabilities [Abstract]
Current deferred tax assets	$21,760	$37,538
Current deferred tax liabilities	0	0
Net current deferred tax assets	21,760	37,538
Non-current deferred tax assets	71,124	62,871
Non-current deferred tax liabilities	182,758	187,769
Non-current deferred tax liabilities	-111,634	-124,898
Deferred Tax Liabilities, Net	($89,874)	($87,360)

Tax_Years_Subject_to_Examinati

Tax Years Subject to Examination by Major Taxing Jurisdictions (Details)	12 Months Ended
	Dec. 31, 2014
United States | Minimum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2009
United States | Maximum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2014
Canada | Minimum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2011
Canada | Maximum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2014
Arkansas | Minimum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2011
Arkansas | Maximum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2014
California | Minimum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2010
California | Maximum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2014
Georgia | Minimum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2010
Georgia | Maximum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2014
Idaho | Minimum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2011
Idaho | Maximum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2014
Illinois | Minimum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2008
Illinois | Maximum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2014
Wisconsin | Minimum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2010
Wisconsin | Maximum
Income Tax Examination [Line Items]
Income tax examination, year under examination	2014

Tax_Credits_and_Losses_Subject

Tax Credits and Losses Subject to Expiration by Major Jurisdictions (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Tax Credit Carryforward [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	($458)	($75,213)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		-1,302
Tax Credit Carryforward, Amount	23,759	27,597
Internal Revenue Service (IRS)
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	5,488
Deferred Tax Assets, Tax Credit Carryforwards, Other	927
Connecticut tax losses
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards	16,358
Connecticut tax losses | Maximum
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards, Expiration Date	31-Dec-33
Connecticut tax losses | Minimum
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards, Expiration Date	31-Dec-18
Georgia tax losses
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards	3,829
Georgia tax losses | Maximum
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards, Expiration Date	31-Dec-33
Georgia tax losses | Minimum
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards, Expiration Date	31-Dec-27
Idaho tax credits
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Other	5,262
Idaho tax credits | Maximum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration date	31-Dec-27
Idaho tax credits | Minimum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration date	31-Dec-14
North Carolina tax credits
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Other	17,974
North Carolina tax credits | Maximum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration date	31-Dec-17
North Carolina tax credits | Minimum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration date	31-Dec-15
Oklahoma tax losses
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards	45,805
Oklahoma tax losses | Maximum
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards, Expiration Date	31-Dec-33
Oklahoma tax losses | Minimum
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards, Expiration Date	31-Dec-30
Foreign Tax Credit [Member] | Internal Revenue Service (IRS) | Maximum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration date	31-Dec-24
Foreign Tax Credit [Member] | Internal Revenue Service (IRS) | Minimum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration date	31-Dec-16
Cellulosic Biofuel Producer Credit [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	1,903
Cellulosic Biofuel Producer Credit [Member] | Internal Revenue Service (IRS) | Maximum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration date	31-Dec-15
General Business Tax Credit Carryforward [Member] | Internal Revenue Service (IRS) | Maximum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration date	31-Dec-33
General Business Tax Credit Carryforward [Member] | Internal Revenue Service (IRS) | Minimum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration date	31-Dec-26
Gross Unrecognized Tax Benefits, Excluding Interest and Penalties
Tax Credit Carryforward [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	-157	-69,816
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		-525
Interest and Penalties
Tax Credit Carryforward [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	-301	-5,397
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		($777)

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Tax Credit Carryforward [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$1,000,000	$1,000,000	$1,000,000
Statutory federal income tax rate			35.00%
Deferred Tax Liability Not Recognized, Events That Would Cause Temporary Difference To Be Taxable, Divestiture of Foreign Subsidiary, Not Discontinued Operations			12,500,000
Goodwill, Written off Related to Asset Divestiture	20,400,000
Deferred Tax Assets, State Taxes	2,900,000	2,900,000	2,900,000
Unrecognized excess tax benefits	2,800,000	2,800,000	2,800,000	2,300,000
Tax expense, reflecting remeasurement of deferred tax assets and liabilities			-1,500,000	700,000	700,000
Change for uncertain tax positions			69,100,000
Deferred tax assets, gross	108,853,000	108,853,000	108,853,000	114,031,000
Deferred Tax Assets, Valuation Allowance	15,969,000	15,969,000	15,969,000	13,622,000
Change in valuation allowance			2,400,000	-1,300,000
Unrecognized tax benefits , if recognized, would favorably impact effective tax rate	2,700,000	2,700,000	2,700,000
Accrued interest related to tax obligations	100,000	100,000	100,000	2,000,000	1,900,000
Federal and state credit carryforwards	23,759,000	23,759,000	23,759,000	27,597,000
Other		1,500,000	-485,000	-10,234,000	4,121,000
Valuation Allowances, State Tax Losses [Member]
Tax Credit Carryforward [Line Items]
Change in valuation allowance			-600,000	-1,200,000
Valuation allowances, State Tax Credits [Member]
Tax Credit Carryforward [Line Items]
Change in valuation allowance			1,900,000	400,000
Valuation Allowance Of Deferred Tax Foreign
Tax Credit Carryforward [Line Items]
Change in valuation allowance			1,100,000	300,000
Cellulosic Biofuel Producer Credit [Member]
Tax Credit Carryforward [Line Items]
Federal and state credit carryforwards	$1,903,000	$1,903,000	$1,903,000

Roll_Forward_of_Unrecognized_T

Roll Forward of Unrecognized Tax Benefits and Associated Interest and Penalties Included in Balance Sheet (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	($458)	($75,213)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		-1,302
Balance	2,658	78,699
Increase in current year tax positions	496	474
Balance	2,696	2,658
Gross Unrecognized Tax Benefits, Excluding Interest and Penalties
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	-157	-69,816
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		-525
Balance	2,132	72,004
Increase in current year tax positions	431	469
Balance	2,406	2,132
Interest and Penalties
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	-301	-5,397
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		-777
Balance	526	6,695
Increase in current year tax positions	65	5
Balance	$290	$526

Accounts_Payable_and_Accrued_L2

Accounts Payable and Accrued Liabilities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts Payable and Accrued Liabilities [Abstract]
Trade accounts payable	$122,856	$108,192
Accrued wages, salaries and employee benefits	41,880	38,563
Accrued interest	12,173	9,691
Accrued discounts and allowances	10,026	6,410
Accrued utilities	6,959	8,309
Accrued taxes other than income taxes payable	5,622	6,322
Other	16,310	13,161
Accounts payable and accrued liabilities	$215,826	$190,648

Debt_Additional_Information_De

Debt - Additional Information (Details) (USD $)

0 Months Ended

12 Months Ended

0 Months Ended

2 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

1 Months Ended

0 Months Ended

Aug. 28, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Jan. 23, 2013

Feb. 22, 2013

Jul. 29, 2014

Jul. 29, 2014

Dec. 31, 2009

Jan. 21, 2013

Nov. 26, 2008

Dec. 31, 2014

Oct. 22, 2010

Jun. 30, 2009

Debt Instrument [Line Items]

Proceeds from long-term debt

$300,000,000

$275,000,000

$0

Proceeds from Lines of Credit

37,000,000

Debt retirement costs

-24,420,000

-17,058,000

0

Accrued interest

12,173,000

9,691,000

12,173,000

Senior Notes

Debt Instrument [Line Items]

Proceeds from long-term debt

271,000,000

Debt instrument principal amount redeemed

166,000,000

Redemption Price

100.00%

Debt retirement costs

12,600,000

Accrued interest

3,000,000

Senior Notes Prior to February 1, 2016

Debt Instrument [Line Items]

Redemption Price

104.50%

Senior Notes Before February First, 2018

Debt Instrument [Line Items]

Redemption Price

100.00%

Senior Notes Due Twenty Twenty-five [Member]

Debt Instrument [Line Items]

Debt instrument, principal amount

300,000,000

300,000,000

Debt instrument, maturity date

1-Feb-25

Debt instrument, interest rate

5.38%

5.38%

Proceeds from long-term debt

298,000,000

Redemption Price

100.00%

100.00%

Senior Notes Due Twenty Twenty-five [Member] | Minimum

Debt Instrument [Line Items]

Debt Instrument Redemption Notice Term

30 days

Senior Notes Due Twenty Twenty-five [Member] | Maximum

Debt Instrument [Line Items]

Debt Instrument Redemption Notice Term

60 days

Senior Notes Due 2018

Debt Instrument [Line Items]

Debt instrument, interest rate

7.13%

Debt instrument principal amount redeemed

375,000,000

Redemption Price

100.00%

Debt retirement costs

17,600,000

Accrued interest

8,700,000

Payments for the redemption of long-term debt

401,300,000

Write off of Deferred Debt Issuance Cost

4,600,000

Senior Notes Due 2016

Debt Instrument [Line Items]

Debt instrument, principal amount

150,000,000

Debt instrument, maturity date

15-Jun-16

Debt instrument, interest rate

10.63%

Debt instrument, price

98.79%

Senior Notes Due 2016 | Senior Notes Prior to June 15, 2013

Debt Instrument [Line Items]

Redemption Price

100.00%

Senior Notes Due Twenty Twenty-Three [Member]

Debt Instrument [Line Items]

Debt instrument, principal amount

275,000,000

Debt instrument, interest rate

4.50%

Senior Notes Due Twenty Twenty-Three [Member] | Senior Notes Prior to February 1, 2016 | Maximum

Debt Instrument [Line Items]

Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed

35.00%

Revolving Credit Facility

Debt Instrument [Line Items]

Credit facility, maximum borrowing capacity

125,000,000

125,000,000

125,000,000

Amount available as percentage of eligible accounts receivable

85.00%

85.00%

Amount available as percentage of eligible inventories

65.00%

65.00%

Earliest extended term of revolving loan

30-Sep-16

Outstanding stand by letters of credit

7,800,000

7,800,000

Credit facility available to draw

$117,200,000

117,200,000

Percentage of availability triggers covenant requirement under credit facility

12.50%

12.50%

Debt covenant, actual fixed charge ratio

1.1

1.1

Revolving Credit Facility | Minimum

Debt Instrument [Line Items]

Debt covenant, actual fixed charge ratio

1

1

Revolving Credit Facility | London Interbank Offered Rate (LIBOR) [Member] | Minimum

Debt Instrument [Line Items]

Interest rate spread

1.75%

Revolving Credit Facility | London Interbank Offered Rate (LIBOR) [Member] | Maximum

Debt Instrument [Line Items]

Interest rate spread

2.25%

Revolving Credit Facility | Federal Fund Rate [Member] | Maximum

Debt Instrument [Line Items]

Interest rate spread

0.50%

Revolving Credit Facility | Base Rate [Member] | Minimum

Debt Instrument [Line Items]

Interest rate spread

1.25%

Revolving Credit Facility | Base Rate [Member] | Maximum

Debt Instrument [Line Items]

Interest rate spread

1.75%

Other_LongTerm_Obligations_Det

Other Long-Term Obligations (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Disclosure Other Long Term Obligations [Abstract]
Long-term lease obligations, net of current portion	$24,805	$24,815
Deferred compensation	14,609	14,149
Deferred proceeds	12,360	11,205
Other	5,082	2,773
Other long-term obligations	$56,856	$52,942

Reclassification_out_of_Accumu2

Reclassification out of Accumulated Other Comprehensive Income (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss, net of tax	($70,863,000)		($58,093,000)		($115,693,000)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	4,773,000		9,468,000
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	-17,543,000		48,132,000
Net current period other comprehensive income ending balance	-12,770,000	[1]	57,600,000	[1]	-428,000
Amortization of actuarial loss	38,600,000		-83,600,000
Amortization of actuarial loss included in net periodic cost, before tax	9,800,000		14,800,000
Amortization of prior service credit included in net periodic cost, before tax	-8,400,000		5,100,000
Amortization of prior service (cost) credit	2,000,000		200,000
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, before Tax			800,000
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Tax	-8,800,000		36,300,000
Foreign Currency Translation Adjustments
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss, net of tax	0	[2]	-874,000	[2]	-874,000	[2]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	[2]	0	[2]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	874,000	[2]	0	[2]
Net current period other comprehensive income ending balance	874,000	[1],[2]	0	[1],[2]
Defined Benefit Pension Plan Adjustments
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss, net of tax	-70,863,000		-57,219,000		-114,819,000
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	4,773,000		9,468,000
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	-18,417,000		48,132,000
Net current period other comprehensive income ending balance	($13,644,000)	[1]	$57,600,000	[1]
[1]	2For the year ended December 31, 2014, net periodic costs associated with our pension and other postretirement employee benefit, or OPEB, plans included in other comprehensive loss and reclassified from accumulated other comprehensive loss, or AOCL, included $38.6 million of net loss on plan assets, $9.8 million of actuarial loss amortization, $8.4 million of prior service credit arising during the period and $2.0 million of prior service credit amortization, less total tax of $8.8 million. For the year ended December 31, 2013, net periodic costs associated with our pension and OPEB plans included in other comprehensive income and reclassified from AOCL included $83.6 million of net gain on plan assets, $14.8 million of actuarial loss amortization, $5.1 million of prior service costs arising during the period, $0.2 million of prior service credit amortization and $0.8 million of curtailments, less total tax of $36.3 million. These accumulated other comprehensive loss components are included in the computation of net periodic pension and OPEB costs in Note 13, “Savings, Pension and Other Postretirement Employee Benefit Plans.”
[2]	1This balance consists of unrealized foreign currency translation adjustments related to the operations of our former Canadian subsidiary before its functional currency was changed from Canadian dollars to U.S. dollars in 2012. As a result of the divestiture of our specialty business and mills, this balance was written-off and included in our net loss on divested assets.

Changes_in_Benefit_Obligation_

Changes in Benefit Obligation, Plan Assets and Funded Status for Company-Sponsored Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at end of year		$286,598,000
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Noncurrent assets	4,738,000	4,488,000
Pension Benefit Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	293,388,000	333,257,000
Service cost	1,390,000	1,738,000	2,485,000
Interest cost	14,825,000	13,375,000	14,693,000
Plan changes	0	0
Actuarial losses (gains)	47,548,000	-36,859,000
Medicare Part D subsidies received	0	0
Benefits paid	-19,150,000	-18,123,000
Benefit obligation at end of year	338,001,000	293,388,000	333,257,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	286,598,000	254,556,000
Actual return on plan assets	36,157,000	34,779,000
Employer contribution	17,450,000	15,386,000
Fair value of plan assets at end of year	321,055,000	286,598,000	254,556,000
Funded status at end of year	-16,946,000	-6,790,000
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Noncurrent assets	4,738,000	4,488,000
Current liabilities	-438,000	-364,000
Noncurrent liabilities	-21,246,000	-10,914,000
Net amount recognized	-16,946,000	-6,790,000
Other Postretirement Employee Benefit Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	107,327,000	134,618,000
Service cost	454,000	552,000	693,000
Interest cost	4,565,000	4,730,000	5,815,000
Plan changes	-8,384,000	5,106,000
Actuarial losses (gains)	7,039,000	-30,322,000
Medicare Part D subsidies received	123,000	308,000
Benefits paid	-6,409,000	-7,665,000
Benefit obligation at end of year	104,715,000	107,327,000	134,618,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	20,000	19,000
Actual return on plan assets	0	1,000
Employer contribution	0	0
Fair value of plan assets at end of year	20,000	20,000	19,000
Funded status at end of year	-104,695,000	-107,307,000
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Noncurrent assets	0	0
Current liabilities	-7,477,000	-8,414,000
Noncurrent liabilities	-97,218,000	-98,893,000
Net amount recognized	($104,695,000)	($107,307,000)

Amounts_Recognized_Pretax_in_A

Amounts Recognized (Pre-tax) in Accumulated Other Comprehensive Loss (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Pension Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Net loss	$130,708	$109,218
Prior service cost (credit)	103	308
Net amount recognized	130,811	109,526
Other Postretirement Employee Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Net loss	1,410	-5,915
Prior service cost (credit)	-7,101	-896
Net amount recognized	($5,691)	($6,811)

Certain_Pension_Plans_with_Acc

Certain Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligation	$338,001	$293,388
Accumulated benefit obligation	338,001	293,388
Fair value of plan assets	$321,055	$286,598

Pretax_Components_of_Net_Perio

Pre-tax Components of Net Periodic Cost (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$1,390	$1,738	$2,485
Interest cost	14,825	13,375	14,693
Expected return on plan assets	-20,196	-18,352	-19,685
Amortization of prior service cost (credit)	205	337	634
Amortization of actuarial loss	10,097	14,840	12,085
Curtailments	0	769	477
Net periodic cost	6,321	12,707	10,689
Other Postretirement Employee Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	454	552	693
Interest cost	4,565	4,730	5,815
Expected return on plan assets	0	0	0
Amortization of prior service cost (credit)	-2,179	-502	-2,680
Amortization of actuarial loss	-286	0	0
Curtailments	0	0	0
Net periodic cost	$2,554	$4,780	$3,828

Other_Amounts_Recognized_in_Ot

Other Amounts Recognized in Other Comprehensive Income (Loss) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service (cost) credit	$2,000	$200
Amortization of actuarial (loss) gain	-38,600	83,600
Pension Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Net loss (gain)	31,587	-53,285	12,989
Curtailments	0	-769	-477
Prior service (credit) cost	0	0	0
Amortization of prior service (cost) credit	-205	-337	-634
Amortization of actuarial (loss) gain	-10,097	-14,840	-12,085
Total recognized in other comprehensive loss (income)	21,285	-69,231	-207
Defined Benefit Plan Total Recognized In Net Periodic Benefit Costs And Other Comprehensive Income Before Tax	27,606	-56,524	10,482
Other Postretirement Employee Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Net loss (gain)	7,039	-30,323	3,150
Curtailments	0	0	0
Prior service (credit) cost	-8,384	5,106	-5,278
Amortization of prior service (cost) credit	2,179	502	2,680
Amortization of actuarial (loss) gain	286	0	0
Total recognized in other comprehensive loss (income)	1,120	-24,715	552
Defined Benefit Plan Total Recognized In Net Periodic Benefit Costs And Other Comprehensive Income Before Tax	$3,674	($19,935)	$4,380

Weighted_Average_Assumptions_U

Weighted Average Assumptions Used to Determine Benefit Obligation (Details)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.25%	5.20%	4.15%
Other Postretirement Employee Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.15%	5.05%	4.05%

Weighted_Average_Assumptions_U1

Weighted Average Assumptions Used to Determine Net Periodic Cost (Benefit) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Future Amortization of Gain (Loss)	$12.30
Discount rate	5.20%	4.15%	4.90%
Expected return on plan assets	7.50%	7.50%	8.00%
Other Postretirement Employee Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.05%	4.05%	4.95%
Expected return on plan assets	0.00%	0.00%	0.00%

One_Percentage_Point_Change_in

One Percentage Point Change in Health Care Cost Trend Rates (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Effect of 1% increase on total service and interest cost components	$493
Effect of 1% decrease on total service and interest cost components	-414
Effect of 1% increase on postretirement employee benefit obligation	10,277
Effect of 1% decrease on postretirement employee benefit obligation	($8,657)

Investments_at_Fair_Value_for_

Investments at Fair Value for Company Sponsored Pension Benefit Plans Within Fair Value Hierarchy (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$286,598,000
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,023,000	4,314,000
Common and collective trusts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	319,032,000
Common and collective trusts | International small cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		15,845,000
Common and collective trusts | Global/International equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		21,198,000
Common and collective trusts | International equity emerging markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		17,809,000
Common stock | Industrials
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		9,307,000
Common stock | Energy
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,663,000
Common stock | Consumer
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		8,002,000
Common stock | Healthcare
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6,013,000
Common stock | Finance
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		11,566,000
Common stock | Utilities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,711,000
Common stock | Information technology
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		8,785,000
Common stock | Foreign
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6,175,000
Mutual funds | Foreign large blend
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		18,492,000
Mutual funds | Long-term bond fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		137,031,000
Mutual funds | Mid-cap Growth Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		18,009,000
Investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	321,055,000	286,920,000
Payable held under securities lending agreement
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		-322,000
Fair Value, Inputs, Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,023,000	4,314,000
Fair Value, Inputs, Level 1 | Common and collective trusts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 1 | Common and collective trusts | International small cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 1 | Common and collective trusts | Global/International equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 1 | Common and collective trusts | International equity emerging markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 1 | Common stock | Industrials
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		9,307,000
Fair Value, Inputs, Level 1 | Common stock | Energy
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,663,000
Fair Value, Inputs, Level 1 | Common stock | Consumer
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		8,002,000
Fair Value, Inputs, Level 1 | Common stock | Healthcare
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6,013,000
Fair Value, Inputs, Level 1 | Common stock | Finance
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		11,566,000
Fair Value, Inputs, Level 1 | Common stock | Utilities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,711,000
Fair Value, Inputs, Level 1 | Common stock | Information technology
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		8,785,000
Fair Value, Inputs, Level 1 | Common stock | Foreign
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6,175,000
Fair Value, Inputs, Level 1 | Mutual funds | Foreign large blend
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		18,492,000
Fair Value, Inputs, Level 1 | Mutual funds | Long-term bond fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		137,031,000
Fair Value, Inputs, Level 1 | Mutual funds | Mid-cap Growth Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		18,009,000
Fair Value, Inputs, Level 1 | Investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,023,000	232,068,000
Fair Value, Inputs, Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 | Common and collective trusts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	319,032,000
Fair Value, Inputs, Level 2 | Common and collective trusts | International small cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		15,845,000
Fair Value, Inputs, Level 2 | Common and collective trusts | Global/International equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		21,198,000
Fair Value, Inputs, Level 2 | Common and collective trusts | International equity emerging markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		17,809,000
Fair Value, Inputs, Level 2 | Common stock | Industrials
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 2 | Common stock | Energy
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 2 | Common stock | Consumer
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 2 | Common stock | Healthcare
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 2 | Common stock | Finance
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 2 | Common stock | Utilities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 2 | Common stock | Information technology
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 2 | Common stock | Foreign
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 2 | Mutual funds | Foreign large blend
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 2 | Mutual funds | Long-term bond fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 2 | Investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	319,032,000	54,852,000
Fair Value, Inputs, Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 | Common and collective trusts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 3 | Common and collective trusts | International small cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Common and collective trusts | Global/International equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Common and collective trusts | International equity emerging markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Common stock | Industrials
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Common stock | Energy
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Common stock | Consumer
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Common stock | Healthcare
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Common stock | Finance
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Common stock | Utilities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Common stock | Information technology
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Common stock | Foreign
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Mutual funds | Foreign large blend
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Mutual funds | Long-term bond fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 3 | Investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$0	$0

Long_Term_Asset_Allocation_Ran

Long Term Asset Allocation Ranges (Details)	12 Months Ended
	Dec. 31, 2014
Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, long-term assets, minimum	14.00%
Defined benefit plan, long-term assets, maximum	22.00%
International equities, including emerging markets
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, long-term assets, minimum	13.00%
Defined benefit plan, long-term assets, maximum	22.00%
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, long-term assets, minimum	50.00%
Defined benefit plan, long-term assets, maximum	70.00%
Liquid reserves
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, long-term assets, minimum	0.00%
Defined benefit plan, long-term assets, maximum	5.00%

Estimated_Future_Benefit_Payme

Estimated Future Benefit Payments (Details) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Pension Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
2015	$19,023
2016	19,318
2017	19,683
2018	20,055
2019	20,543
2020-2023	104,772
Other Postretirement Employee Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
2015	7,497
2016	7,794
2017	7,728
2018	7,781
2019	7,526
2020-2023	$31,412

Savings_Pension_and_Other_Post2

Savings, Pension and Other Postretirement Employee Benefit Plans Multiemployer Defined Benefit Plans (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Entity Tax Identification Number	516031295
Contributions (in thousands)	$6,008		$6,061	$5,961
IAM
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plan Number	2
Multiemployer Plans, Certified Zone Status	Green		Green
Contributions (in thousands)	343		343	288
Multiemployer Plans, Surcharge	No
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	31-May-16
USW
Defined Benefit Plan Disclosure [Line Items]
Entity Tax Identification Number	116166763
Multiemployer Plan Number	1
Multiemployer Plans, Certified Zone Status	Red		Red
Contributions (in thousands)	$5,665		$5,718	$5,673
Multiemployer Plans, Surcharge	No
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	31-Aug-14	[1]
[1]	1 The Collective Bargaining Agreement at Lewiston, Idaho for employees associated with PIUMPF expired on 8/31/2014. As of the date of this report, a new agreement is still being negotiated.

Savings_Pension_and_Other_Post3

Savings, Pension and Other Postretirement Employee Benefit Plans Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$286,598,000
Multiemployer Plans, Withdrawal Obligation		72,000,000
IAM
Defined Benefit Plan Disclosure [Line Items]
Contribution rates	4		3.25
Maximum | Plan A [Member]
Defined Benefit Plan Disclosure [Line Items]
Funded Percentage Of Pension Protection Plan	65.00%
Maximum | Plan B [Member]
Defined Benefit Plan Disclosure [Line Items]
Funded Percentage Of Pension Protection Plan	80.00%
Minimum | Plan B [Member]
Defined Benefit Plan Disclosure [Line Items]
Funded Percentage Of Pension Protection Plan	65.00%
Minimum | Plan C [Member]
Defined Benefit Plan Disclosure [Line Items]
Funded Percentage Of Pension Protection Plan	80.00%
Pension Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Curtailments	0	769,000	477,000
Net loss expected to be recognized as component of net periodic benefit over the next fiscal year	-12,300,000
Prior service cost, expected to be recognized as a component of net periodic benefit cost over the next fiscal year		-100,000
Medicare Part D subsidies received	0	0
Fair value of plan assets	321,055,000	286,598,000	254,556,000
Employer contribution	17,450,000	15,386,000
Other Postretirement Employee Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Curtailments	0	0	0
Prior service cost, expected to be recognized as a component of net periodic benefit cost over the next fiscal year	2,200,000
Medicare Part D subsidies received	123,000	308,000
Assumed health care cost trend rates used to determine the company's benefit obligations and expense	6.30%
Expected year when trend rate to be reached	70 years
Fair value of plan assets	20,000	20,000	19,000
Employer contribution	0	0
Other Postretirement Employee Benefit Plans | Maximum
Defined Benefit Plan Disclosure [Line Items]
Assumed health care cost trend rates, graded rate	4.50%
Other Postretirement Employee Benefit Plans | Minimum
Defined Benefit Plan Disclosure [Line Items]
Assumed health care cost trend rates, graded rate	4.30%
Company-Sponsored Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contribution	17,000,000
Estimated cash contributions in next fiscal year	12,000,000
Non Qualified Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contribution	500,000
Fair Value, Inputs, Level 1 | Other Postretirement Employee Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20,000
Employer 401 (k) Matching Contribution [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	17,400,000	16,800,000	14,900,000
Cost of Sales [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax	6,600,000	14,200,000
Selling, General and Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax	$2,300,000	$3,300,000

Share_Reconciliation_of_Number

Share Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted Net Earnings Per Share (Details) (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
Earnings Per Share [Abstract]
Basic average common shares outstanding									20,129,557	22,081,026	23,298,663	[1]
Incremental shares due to:
Restricted stock units									0	53,803	24,086
Performance shares									0	129,003	291,036
Incremental Common Shares Attributable to Stock Options									0	0	0
Diluted average common shares outstanding									20,129,557	22,263,832	23,613,785
Basic net earnings per common share	($1.39)	$0.32	$0.61	$0.30	$3.91	$0.60	$0.52	($0.04)	($0.11)	$4.84	$2.75
Diluted net earnings per common share	($1.39)	$0.31	$0.61	$0.29	$3.87	$0.60	$0.52	($0.04)	($0.11)	$4.80	$2.72
Anti-dilutive shares excluded from calculation									566,041	41,337	9,992
[1]	Basic average common shares outstanding include restricted stock awards that are fully vested, but are deferred for future issuance. See Note 15, "Equity-Based Compensation Plans" for further discussion.

EquityBased_Compensation_Plans2

Equity-Based Compensation Plans Employee Plans Equity Based Compensation Expense (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation	$8,184	$6,876	$8,334
Related tax benefit	2,955	2,049	2,886
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation	1,966	1,801	970
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation	4,964	5,075	7,364
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation	$1,254	$0	$0

EquityBased_Compensation_Plans3

Equity-Based Compensation Plans Summary of Status of Outstanding RSU Awards (Details) (Restricted stock units, USD $)	3 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted stock units
Number of share
Beginning Balance	169,344	102,658	63,727	169,344
Granted		31,567	72,702	52,294
Vested	-126,726	-32,117	-30,190	-155,177
Forfeited		-8,854	-3,581	-2,734
Ending Balance		93,254	102,658	63,727
Weighted Average Grant Date Fair Value
Beginning Balance	$11.33	$39.85	$35.57	$11.33
Granted		$66.33	$43.44	$34.59
Vested		$38.94	$39.21	$8.82
Forfeited		$52.28	$42.03	$34.07
Ending Balance		$47.95	$39.85	$35.57
Aggregate intrinsic value
Aggregate intrinsic value		$6,393	$5,390	$2,496

EquityBased_Compensation_Plans4

Equity-Based Compensation Plans Assumption Used in Monte Carlo Model to Estimate Fair Value of Performance Shares Awards (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$22.99
Risk free rate	2.05%
Measurement period	6 years 4 months 24 days
Volatility	30.00%
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price of stock on date of grant	$66.97
Risk free rate	0.66%
Measurement period	3 years
Volatility	30.00%

EquityBased_Compensation_Plans5

Equity-Based Compensation Plans Summary of Status of Outstanding Performance Share Awards (Details) (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, Options, Nonvested, Number of Shares [Roll Forward]
Beginning Balance	0
Granted	163,137
Forfeited	-12,557
Ending Balance	150,580
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Beginning Balance	$0
Granted	$66.85
Forfeited	$66.97
Ending Balance	$66.84
Aggregate intrinsic value
Aggregate intrinsic value	$258
Performance shares
Number of share
Ending Balance	300,864	259,841	392,655
Granted	54,379	124,513	150,865
Settled	0	-246,592	-499,680
Forfeited	-13,356	-10,735	-8,068
Beginning Balance	259,841	392,655	749,538
Weighted Average Grant Date Fair Value
Beginning Balance	$50.87	$44.67	$19.52
Granted	$105.08	$63.46	$40.24
Settled	$0	$47.19	$5.65
Forfeited	$71.03	$54.87	$42.15
Ending Balance	$59.77	$50.87	$44.67
Aggregate intrinsic value
Aggregate intrinsic value	$20,624	$13,642	$15,376

EquityBased_Compensation_Plans6

Equity-Based Compensation Plans - Additional Information (Details) (USD $)	12 Months Ended			3 Months Ended			37 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Mar. 31, 2014	Mar. 31, 2012	Jan. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Plan, effective date	16-Dec-08
Stock Plan, shares authorized	4,100,000			4,100,000
Shares Available For Grant	1,900,000			1,900,000
Cash paid for minimum tax withholdings	$1,523,000	$4,831,000	$13,234,000
Share based compensation expense	-8,184,000	-6,876,000	-8,334,000
Equity Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	2,100,000			2,100,000
Unrecognized compensation costs, expected weighted-average period to be recognized (in years)	1 year 9 months 18 days
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation awards vesting period	3 years
Unrecognized compensation costs	5,300,000			5,300,000
Unrecognized compensation costs, expected weighted-average period to be recognized (in years)	1 year 1 month 13 days
Vested Shares Settled Without Payment	108,366
Shares vested (in shares)	0	246,592	499,680
Share based compensation expense	-4,964,000	-5,075,000	-7,364,000
Performance Shares [Member] | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of amount subject to performance share award of number of shares actually issued	0.00%			0.00%
Performance Shares [Member] | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of amount subject to performance share award of number of shares actually issued	200.00%			200.00%
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	-1,254,000	0	0
Employee Stock Option [Member] | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation awards vesting period	1 year
Employee Stock Option [Member] | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation awards vesting period	3 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of share awards vested	1,300,000
Unrecognized compensation costs	2,300,000			2,300,000
Unrecognized compensation costs, expected weighted-average period to be recognized (in years)	1 year 6 months 0 days
Settlement and distribution of shares issued (in shares)	75,400	22,370		27,933
Vested Shares Deferred In The Period		104,356
Distributed of Previously Deferred Shares	47,467
Shares vested (in shares)	32,117	30,190	155,177			126,726
Shares issued (in shares)		73,154			48,476
Cash paid for minimum tax withholdings		2,600,000			1,500,000
Balance of Shares Vested and Deferred	37,135			37,135
Share based compensation expense	-1,966,000	-1,801,000	-970,000
Restricted Stock Units (RSUs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation awards vesting period	1 year
Restricted Stock Units (RSUs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation awards vesting period	3 years
Cellu Tissue Holdings Inc
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Plan, shares authorized	700,000			700,000
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation awards vesting period	1 year						3 years
Share based compensation expense	-4,600,000	-4,100,000	-1,400,000
Deferred compensation share-based arrangements, liability, classified, noncurrent	13,500,000	-13,200,000		13,500,000
Deferred Compensation Share-based Arrangements, Liability, Current	$1,400,000			$1,400,000

Fair_Value_Measurements_Estima

Fair Value Measurements Estimated Fair Values of Financial Instruments (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash, restricted cash, and short-term investments (Level 1)	$81,101	$95,206
Long-term debt (Level 1)	558,000	651,313
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash, restricted cash, and short-term investments (Level 1)	81,101	95,206
Long-term debt (Level 1)	$575,000	$650,000

Commitments_and_Contingencies_1

Commitments and Contingencies Commitments and Contingencies Additional Information (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Leases Disclosure [Line Items]
Rent expense	$18.60	$19.40	$16.60

Commitments_and_Contingencies_2

Commitments and Contingencies Commitments and Contingencies Future Minimum Lease Payments (Details) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	$2,530
2016	2,576
2017	2,623
2018	2,670
2019	2,697
Thereafter	32,193
Total future minimum lease payments	45,289
Less interest portion	-21,238
Present value of future minimum lease payments	24,051
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	14,588
2016	11,899
2017	9,669
2018	6,351
2019	3,293
Thereafter	7,503
Total future minimum lease payments	$53,303

Segment_Information_Reportable

Segment Information Reportable Segments Information (Details) (USD $)	0 Months Ended		3 Months Ended								12 Months Ended						9 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		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		Sep. 30, 2014
Segment Reporting Information [Line Items]
Net sales			$472,318	$511,142	$498,759	$484,920	$470,159	$487,845	$471,002	$460,824	$1,967,139	[1]	$1,889,830	[1]	$1,874,304	[1]
Income from operations			-17,768	43,978	33,083	20,518	38,289	18,842	29,714	12,483	79,811		99,328		145,387
Loss on divested assets	-40,159	[2]	-40,159	0	0	0	0	0	0	0	-40,159		0		0
Depreciation and amortization											90,145		90,272		79,333
Assets	1,585,928		1,585,928				1,744,825				1,585,928		1,744,825		1,633,456
Capital expenditures											99,600		86,508		207,115
Consumer Products
Segment Reporting Information [Line Items]
Net sales											1,183,385	[1]	1,149,692	[1]	1,134,556	[1]
Income from operations											34,131		52,799		93,347
Loss on divested assets	-40,159
Depreciation and amortization											61,504		65,197		54,547
Assets	1,037,912		1,037,912				1,215,919				1,037,912		1,215,919		1,178,438
Capital expenditures											43,562		46,647		183,330
Pulp and Paperboard
Segment Reporting Information [Line Items]
Net sales											783,754	[1]	740,138	[1]	739,748	[1]
Income from operations											144,171		95,781		103,910	[1]
Depreciation and amortization											25,452		23,266		23,113
Assets	413,143		413,143				359,735				413,143		359,735		344,614
Capital expenditures											45,146		30,846		19,954
Operating Segments
Segment Reporting Information [Line Items]
Income from operations											138,143		148,580		197,257
Assets	1,451,055		1,451,055				1,575,654				1,451,055		1,575,654		1,523,052
Capital expenditures											88,708		77,493		203,284
Corporate
Segment Reporting Information [Line Items]
Income from operations											-58,332		-49,252		-51,870	[1]
Depreciation and amortization											3,189		1,809		1,673
Assets	134,873		134,873				169,171				134,873		169,171		110,404
Capital expenditures											10,892		9,015		3,831
Externally sold pulp [Member] | Consumer Products
Segment Reporting Information [Line Items]
Net sales																	2,100
Externally sold pulp [Member] | Pulp and Paperboard
Segment Reporting Information [Line Items]
Net sales													$5,800		$9,000
[1]	1 In 2013 and 2012, pulp not utilized internally was sold by the Pulp and Paperboard segment to external customers resulting in net sales of $5.8 million and $9.0 million respectively. Commencing in 2014, the majority of excess pulp is sold by the Consumer Products segment and totaled $2.1 million.
[2]	2 These costs relate to the sale of our Consumer Products segment’s specialty business and mills. For additional discussion, see Note 4, “Divested Assets”

Segment_Information_Segment_In

Segment Information Segment Information Summary of Geographic Information Regarding Net Sales (Details) (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. 29, 2014	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
									Facilities
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of production facilities within the united states									1
Net sales	$472,318	$511,142	$498,759	$484,920	$470,159	$487,845	$471,002	$460,824		$1,967,139	[1]	$1,889,830	[1]	$1,874,304	[1]
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales										1,840,726		1,751,001		1,726,561
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales										63,831		67,728		63,368
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales										25,411		26,161		29,557
Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales										11,105		10,899		9,655
Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales										7,219		7,924		7,786
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales										3,385		2,964		6,102
Taiwan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales										2,000		1,755		11,061
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales										1,876		5,404		3,488
Other foreign countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales										$11,586		$15,994		$16,726
[1]	1 In 2013 and 2012, pulp not utilized internally was sold by the Pulp and Paperboard segment to external customers resulting in net sales of $5.8 million and $9.0 million respectively. Commencing in 2014, the majority of excess pulp is sold by the Consumer Products segment and totaled $2.1 million.

Financial_Results_by_Quarter_F1

Financial Results by Quarter Financial Results by Quarter (Details) (USD $)	0 Months Ended		3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014		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
Quarterly Financial Information Disclosure [Abstract]
Net sales			$472,318	$511,142	$498,759	$484,920	$470,159	$487,845	$471,002	$460,824	$1,967,139	[1]	$1,889,830	[1]	$1,874,304	[1]
Costs and expenses:
Cost of sales			-413,643	-434,457	-434,111	-426,629	-401,404	-441,237	-414,521	-414,209	-1,708,840		-1,671,371		-1,607,872
Loss on divested assets	-40,159	[2]	-40,159	0	0	0	0	0	0	0	-40,159		0		0
Selling, general and administrative expenses			-33,206	-31,817	-31,565	-33,514	-30,466	-27,766	-26,767	-34,132	-130,102		-119,131		-121,045
Impairment of assets			-3,078	-890	0	-4,259	0	0	0	0	-8,227		0		0
Total operating costs and expenses			-490,086	-467,164	-465,676	-464,402	-431,870	-469,003	-441,288	-448,341	-1,887,328		-1,790,502		-1,728,917
Income from operations			-17,768	43,978	33,083	20,518	38,289	18,842	29,714	12,483	79,811		99,328		145,387
Net earnings			($27,247)	$6,253	$12,453	$6,226	$82,862	$13,317	$11,658	($882)	($2,315)		$106,955		$64,131
Net earnings per common share:
Basic (in dollars per share)			($1.39)	$0.32	$0.61	$0.30	$3.91	$0.60	$0.52	($0.04)	($0.11)		$4.84		$2.75
Diluted (in dollars per share)			($1.39)	$0.31	$0.61	$0.29	$3.87	$0.60	$0.52	($0.04)	($0.11)		$4.80		$2.72
[1]	1 In 2013 and 2012, pulp not utilized internally was sold by the Pulp and Paperboard segment to external customers resulting in net sales of $5.8 million and $9.0 million respectively. Commencing in 2014, the majority of excess pulp is sold by the Consumer Products segment and totaled $2.1 million.
[2]	2 These costs relate to the sale of our Consumer Products segment’s specialty business and mills. For additional discussion, see Note 4, “Divested Assets”

Supplemental_Guarantor_Financi2

Supplemental Guarantor Financial Information Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) (Details) (USD $)	0 Months Ended		3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		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 Financial Statements, Captions [Line Items]
Net sales			$472,318	$511,142	$498,759	$484,920	$470,159	$487,845	$471,002	$460,824	$1,967,139	[1]	$1,889,830	[1]	$1,874,304	[1]
Cost and expenses:
Cost of sales			-413,643	-434,457	-434,111	-426,629	-401,404	-441,237	-414,521	-414,209	-1,708,840		-1,671,371		-1,607,872
Selling, general and administrative expenses			-33,206	-31,817	-31,565	-33,514	-30,466	-27,766	-26,767	-34,132	-130,102		-119,131		-121,045
Loss on divested assets	-40,159	[2]	-40,159	0	0	0	0	0	0	0	-40,159		0		0
Impairment of assets			-3,078	-890	0	-4,259	0	0	0	0	-8,227		0		0
Total operating costs and expenses			-490,086	-467,164	-465,676	-464,402	-431,870	-469,003	-441,288	-448,341	-1,887,328		-1,790,502		-1,728,917
Income from operations			-17,768	43,978	33,083	20,518	38,289	18,842	29,714	12,483	79,811		99,328		145,387
Interest expense, net											-39,150		-44,036		-33,796
Debt retirement costs											-24,420		-17,058		0
Equity in income (loss) of subsidiary											0
Earnings before income taxes											16,241		38,234		111,591
Income tax (provision) benefit											-18,556		68,721		-47,460
Net (loss) earnings			-27,247	6,253	12,453	6,226	82,862	13,317	11,658	-882	-2,315		106,955		64,131
Other comprehensive income, net of tax											-12,770	[3]	57,600	[3]	-428
Comprehensive income											-15,085		164,555		63,703
Issuer
Condensed Financial Statements, Captions [Line Items]
Net sales											1,573,912		1,474,103		1,404,467
Cost and expenses:
Cost of sales											-1,321,143		-1,269,107		-1,178,148
Selling, general and administrative expenses											-107,141		-94,861		-96,668
Loss on divested assets											0
Impairment of assets											0
Total operating costs and expenses											-1,428,284		-1,363,968		-1,274,816
Income from operations											145,628		110,135		129,651
Interest expense, net											-39,091		-44,031		-33,796
Debt retirement costs											-24,420		-17,058
Equity in income (loss) of subsidiary											-58,953		-15,370		1,339
Earnings before income taxes											82,117		49,046		95,855
Income tax (provision) benefit											-47,694		61,778		-42,440
Net (loss) earnings											-24,530		95,454		54,754
Other comprehensive income, net of tax											-12,770		57,600		-428
Comprehensive income											-37,300		153,054		54,326
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net sales											531,520		565,783		539,570
Cost and expenses:
Cost of sales											-526,192		-553,006		-501,879
Selling, general and administrative expenses											-22,747		-22,918		-22,268
Loss on divested assets											-40,159
Impairment of assets											-8,227
Total operating costs and expenses											-597,325		-575,924		-524,147
Income from operations											-65,805		-10,141		15,423
Interest expense, net											-59		-5		0
Debt retirement costs											0
Equity in income (loss) of subsidiary											-528		-804		278
Earnings before income taxes											-65,864		-10,146		15,423
Income tax (provision) benefit											7,439		-4,420		-14,362
Net (loss) earnings											-58,953		-15,370		1,339
Comprehensive income											-58,953		-15,370		1,339
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net sales											43,929		54,978		59,442
Cost and expenses:
Cost of sales											-43,727		-54,292		-57,020
Selling, general and administrative expenses											-214		-1,352		-2,109
Loss on divested assets											0
Impairment of assets											0
Total operating costs and expenses											-43,941		-55,644		-59,129
Income from operations											-12		-666		313
Interest expense, net													0		0
Debt retirement costs											0
Equity in income (loss) of subsidiary											0
Earnings before income taxes											-12		-666		313
Income tax (provision) benefit											-516		-138		-35
Net (loss) earnings											-528		-804		278
Comprehensive income											-528		-804		278
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net sales											-182,222		-205,034		-129,175
Cost and expenses:
Cost of sales											182,222		205,034		129,175
Loss on divested assets											0
Impairment of assets											0
Total operating costs and expenses											182,222		205,034		129,175
Income from operations											0		0		0
Debt retirement costs											0
Equity in income (loss) of subsidiary											59,481		16,174		-1,617
Earnings before income taxes											0		0		0
Income tax (provision) benefit											22,215		11,501		9,377
Net (loss) earnings											81,696		27,675		7,760
Comprehensive income											$81,696		$27,675		$7,760
[1]	1 In 2013 and 2012, pulp not utilized internally was sold by the Pulp and Paperboard segment to external customers resulting in net sales of $5.8 million and $9.0 million respectively. Commencing in 2014, the majority of excess pulp is sold by the Consumer Products segment and totaled $2.1 million.
[2]	2 These costs relate to the sale of our Consumer Products segment’s specialty business and mills. For additional discussion, see Note 4, “Divested Assets”
[3]	2For the year ended December 31, 2014, net periodic costs associated with our pension and other postretirement employee benefit, or OPEB, plans included in other comprehensive loss and reclassified from accumulated other comprehensive loss, or AOCL, included $38.6 million of net loss on plan assets, $9.8 million of actuarial loss amortization, $8.4 million of prior service credit arising during the period and $2.0 million of prior service credit amortization, less total tax of $8.8 million. For the year ended December 31, 2013, net periodic costs associated with our pension and OPEB plans included in other comprehensive income and reclassified from AOCL included $83.6 million of net gain on plan assets, $14.8 million of actuarial loss amortization, $5.1 million of prior service costs arising during the period, $0.2 million of prior service credit amortization and $0.8 million of curtailments, less total tax of $36.3 million. These accumulated other comprehensive loss components are included in the computation of net periodic pension and OPEB costs in Note 13, “Savings, Pension and Other Postretirement Employee Benefit Plans.”

Supplemental_Guarantor_Financi3

Supplemental Guarantor Financial Information Condensed Consolidating Balance Sheet (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Current assets:
Cash	$27,331	$23,675	$12,579	$8,439
Restricted cash	1,500	1,500
Short-term investments	50,000	70,000
Receivables, net	133,914	158,874
Taxes receivable	1,255	10,503
Inventories	286,626	267,788
Deferred tax assets	21,760	37,538
Prepaid expenses	4,191	5,523
Total current assets	526,577	575,401
Property, plant and equipment, net	810,987	884,698
Goodwill	209,087	229,533
Intangible assets, net	24,956	40,778
Investment in subsidiary	0	0
Pension assets	4,738	4,488
Other assets, net	9,583	9,927
TOTAL ASSETS	1,585,928	1,744,825	1,633,456
Current liabilities:
Accounts payable and accrued liabilities	215,826	190,648
Current liability for pensions and other postretirement employee benefits	7,915	8,778
Total current liabilities	223,741	199,426
Long-term debt	575,000	650,000
Liability for pensions and other postretirement employee benefits	118,464	109,807
Other long-term obligations	56,856	52,942
Accrued taxes	2,696	2,658
Deferred tax liabilities (assets)	-111,634	-124,898
Accumulated other comprehensive loss, net of tax	-70,863	-58,093	-115,693
Stockholders' equity excluding accumulated other comprehensive loss	568,400	663,187
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,585,928	1,744,825
Issuer
Current assets:
Cash	27,331	18,273	11,105	2,146
Restricted cash	1,500	1,500
Short-term investments	50,000	70,000
Receivables, net	117,970	119,278
Taxes receivable	6,760	3,709
Inventories	246,210	198,476
Deferred tax assets	14,733	42,289
Prepaid expenses	3,734	4,704
Total current assets	468,238	458,229
Property, plant and equipment, net	657,369	636,662
Goodwill	209,087	229,533
Intangible assets, net	5,224	0
Intercompany receivable (payable)	33,703	91,865
Investment in subsidiary	137,282	196,763
Pension assets	4,738	4,488
Other assets, net	8,496	8,772
TOTAL ASSETS	1,524,137	1,626,312
Current liabilities:
Accounts payable and accrued liabilities	193,326	140,125
Current liability for pensions and other postretirement employee benefits	7,915	8,778
Total current liabilities	201,241	148,903
Long-term debt	575,000	650,000
Liability for pensions and other postretirement employee benefits	118,464	109,807
Other long-term obligations	56,029	51,740
Accrued taxes	1,902	1,430
Deferred tax liabilities (assets)	-73,964	-59,338
Accumulated other comprehensive loss, net of tax	-70,863	-58,093
Stockholders' equity excluding accumulated other comprehensive loss	568,400	663,187
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,524,137	1,626,312
Guarantor Subsidiaries
Current assets:
Cash	0	0	5	4,359
Receivables, net	16,557	38,063
Taxes receivable	-15,758	-15,882
Inventories	40,416	65,017
Deferred tax assets	5,206	6,094
Prepaid expenses	457	695
Total current assets	46,878	93,987
Property, plant and equipment, net	153,618	231,225
Intangible assets, net	19,732	39,619
Intercompany receivable (payable)	-21,629	-63,932
Investment in subsidiary	0	5,575
Pension assets	0	0
Other assets, net	1,087	1,155
TOTAL ASSETS	199,686	307,629
Current liabilities:
Accounts payable and accrued liabilities	23,113	45,736
Total current liabilities	23,113	45,736
Other long-term obligations	827	1,202
Accrued taxes	794	911
Deferred tax liabilities (assets)	-37,670	-63,017
Accumulated other comprehensive loss, net of tax	0
Stockholders' equity excluding accumulated other comprehensive loss	137,282	196,763
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	199,686	307,629
Non-Guarantor Subsidiaries
Current assets:
Cash	0	5,402	1,469	1,934
Receivables, net	0	2,700
Taxes receivable	0	324
Inventories	0	4,295
Deferred tax assets	0	5
Prepaid expenses	0	124
Total current assets	0	12,850
Property, plant and equipment, net	0	16,811
Intangible assets, net	0	1,159
Intercompany receivable (payable)		-16,431
Pension assets	0	0
TOTAL ASSETS	0	14,389
Current liabilities:
Accounts payable and accrued liabilities	0	5,954
Total current liabilities	0	5,954
Accrued taxes	0	317
Deferred tax liabilities (assets)	0	-2,543
Accumulated other comprehensive loss, net of tax	0
Stockholders' equity excluding accumulated other comprehensive loss	0	5,575
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	0	14,389
Eliminations
Current assets:
Cash	0	0	0	0
Receivables, net	-613	-1,167
Taxes receivable	10,253	22,352
Deferred tax assets	1,821	-10,850
Total current assets	11,461	10,335
Intercompany receivable (payable)	-12,074	-11,502
Investment in subsidiary	-137,282	-202,338
Pension assets	0	0
TOTAL ASSETS	-137,895	-203,505
Current liabilities:
Accounts payable and accrued liabilities	-613	-1,167
Total current liabilities	-613	-1,167
Deferred tax liabilities (assets)	0	0
Accumulated other comprehensive loss, net of tax	0
Stockholders' equity excluding accumulated other comprehensive loss	-137,282	-202,338
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	($137,895)	($203,505)

Supplemental_Guarantor_Financi4

Supplemental Guarantor Financial Information Condensed Consolidating Statement of Cash Flows (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings (loss)	($2,315)	$106,955	$64,131
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	90,145	90,272	79,333
Equity-based compensation expense	12,790	10,960	9,703
Impairment of assets	8,227	0	0
Deferred tax expense (benefit)	13,813	5,629	12,870
Employee benefit plans	2,115	10,131	9,366
Deferred issuance costs and discounts on long-term debt	6,141	4,964	2,010
Loss on divestiture of assets	29,059	0	0
Disposal of plant and equipment, net	959	1,493	2,003
Non-cash adjustments to unrecognized taxes	38	-75,308	3,275
Changes in working capital, net	-12,248	-15,022	61,281
Change in taxes receivable, net	9,248	10,325	-10,828
Excess tax benefits from equity-based payment arrangements	-864	0	-15,837
Change in non-current accrued taxes, net	290	569	960
Funding of qualified pension plans	-16,955	-15,050	-20,627
Other, net	-1,343	439	1,053
Net cash flows from operating activities	139,100	136,357	198,693
CASH FLOWS FROM INVESTING ACTIVITIES
Change in short-term investments, net	20,000	-50,000	35,001
Additions to plant and equipment	-93,028	-90,593	-203,776
Cash paid for acquisitions, net of cash acquired	0	0	-9,264
Proceeds from divested assets	107,740	0	0
Proceeds from sale of assets	975	0	1,035
Net cash flows from investing activities	35,687	-140,593	-177,004
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from long-term debt	300,000	275,000	0
Repayment of long-term debt	-375,000	-150,000	0
Purchase of treasury stock	-100,000	-100,000	-18,650
Investment (to) from Parent	0	0	0
Payments for long-term debt issuance costs	-3,002	-4,837	-2
Excess tax benefits from equity-based payment arrangements	864	0	15,837
Payment of tax withholdings on equity-based payment arrangements	-1,523	-4,831	-13,234
Other, net	7,530	0	-1,500
Net cash flows from financing activities	-171,131	15,332	-17,549
Increase in cash	3,656	11,096	4,140
Cash at beginning of period	23,675	12,579	8,439
Cash at end of period	27,331	23,675	12,579
Issuer
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings (loss)	-24,530	95,454	54,754
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	59,373	54,291	48,191
Equity-based compensation expense	12,790	10,960	9,703
Impairment of assets	0
Deferred tax expense (benefit)	50,943	3,185	9,840
Employee benefit plans	2,115	10,131	9,366
Deferred issuance costs and discounts on long-term debt	6,141	4,964	2,010
Loss on divestiture of assets	0
Disposal of plant and equipment, net	471	201	622
Non-cash adjustments to unrecognized taxes	472	-75,308	3,275
Changes in working capital, net	-8,162	-31,256	25,252
Change in taxes receivable, net	-3,051	17,003	-11,755
Excess tax benefits from equity-based payment arrangements	-864		-15,837
Change in non-current accrued taxes, net	0	1,423	-242
Funding of qualified pension plans	-16,955	-15,050	-20,627
Other, net	-636	-452	1,317
Net cash flows from operating activities	78,107	75,546	115,869
CASH FLOWS FROM INVESTING ACTIVITIES
Change in short-term investments, net	20,000	-50,000	35,001
Additions to plant and equipment	-73,223	-65,708	-190,296
Cash paid for acquisitions, net of cash acquired			-9,264
Proceeds from divested assets	107,740
Proceeds from sale of assets	38		0
Net cash flows from investing activities	54,555	-115,708	-164,559
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from long-term debt	300,000	275,000
Repayment of long-term debt	-375,000	-150,000
Purchase of treasury stock	-100,000	-100,000	-18,650
Investment (to) from Parent	47,527	31,998	75,198
Payments for long-term debt issuance costs	-3,002	-4,837	-2
Excess tax benefits from equity-based payment arrangements	864		15,837
Payment of tax withholdings on equity-based payment arrangements	-1,523	-4,831	-13,234
Other, net	7,530		-1,500
Net cash flows from financing activities	-123,604	47,330	57,649
Increase in cash	9,058	7,168	8,959
Cash at beginning of period	18,273	11,105	2,146
Cash at end of period	27,331	18,273	11,105
Guarantor Subsidiaries
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings (loss)	-58,953	-15,370	1,339
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	28,468	33,712	29,030
Equity-based compensation expense	0	0	0
Impairment of assets	8,227
Deferred tax expense (benefit)	-21,921	-9,072	4,009
Employee benefit plans	0	0	0
Deferred issuance costs and discounts on long-term debt	0	0	0
Loss on divestiture of assets	29,059
Disposal of plant and equipment, net	488	1,291	1,381
Non-cash adjustments to unrecognized taxes	-117	0	0
Changes in working capital, net	-4,711	11,747	36,596
Change in taxes receivable, net	79	15,998	593
Excess tax benefits from equity-based payment arrangements	0		0
Change in non-current accrued taxes, net	290	-860	22
Funding of qualified pension plans	0	0	0
Other, net	-707	891	-264
Net cash flows from operating activities	-19,798	38,337	72,706
CASH FLOWS FROM INVESTING ACTIVITIES
Change in short-term investments, net	0	0	0
Additions to plant and equipment	-19,450	-22,562	-11,632
Cash paid for acquisitions, net of cash acquired			0
Proceeds from divested assets	0
Proceeds from sale of assets	937		1,035
Net cash flows from investing activities	-18,513	-22,562	-10,597
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from long-term debt	0	0
Repayment of long-term debt	0	0
Purchase of treasury stock	0	0	0
Investment (to) from Parent	38,311	-15,780	-66,463
Payments for long-term debt issuance costs	0	0	0
Excess tax benefits from equity-based payment arrangements	0		0
Payment of tax withholdings on equity-based payment arrangements	0	0	0
Other, net	0		0
Net cash flows from financing activities	38,311	-15,780	-66,463
Increase in cash	0	-5	-4,354
Cash at beginning of period	0	5	4,359
Cash at end of period	0	0	5
Non-Guarantor Subsidiaries
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings (loss)	-528	-804	278
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	2,304	2,269	2,112
Equity-based compensation expense	0	0	0
Impairment of assets	0
Deferred tax expense (benefit)	-2,538	-125	-188
Employee benefit plans	0	0	0
Deferred issuance costs and discounts on long-term debt	0	0	0
Loss on divestiture of assets	0
Disposal of plant and equipment, net	0	1	0
Non-cash adjustments to unrecognized taxes	-317	0	0
Changes in working capital, net	625	4,487	-567
Change in taxes receivable, net	121	-324	334
Excess tax benefits from equity-based payment arrangements	0		0
Change in non-current accrued taxes, net	0	6	1,180
Funding of qualified pension plans	0	0	0
Other, net	0	0	0
Net cash flows from operating activities	-333	5,510	3,149
CASH FLOWS FROM INVESTING ACTIVITIES
Change in short-term investments, net	0	0	0
Additions to plant and equipment	-355	-2,323	-1,848
Cash paid for acquisitions, net of cash acquired			0
Proceeds from divested assets	0
Proceeds from sale of assets	0		0
Net cash flows from investing activities	-355	-2,323	-1,848
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from long-term debt	0	0
Repayment of long-term debt	0	0
Purchase of treasury stock	0	0	0
Investment (to) from Parent	-4,714	746	-1,766
Payments for long-term debt issuance costs	0	0	0
Excess tax benefits from equity-based payment arrangements	0		0
Payment of tax withholdings on equity-based payment arrangements	0	0	0
Other, net	0		0
Net cash flows from financing activities	-4,714	746	-1,766
Increase in cash	-5,402	3,933	-465
Cash at beginning of period	5,402	1,469	1,934
Cash at end of period	0	5,402	1,469
Eliminations
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings (loss)	81,696	27,675	7,760
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	0	0	0
Equity-based compensation expense	0	0	0
Impairment of assets	0
Deferred tax expense (benefit)	-12,671	11,641	-791
Employee benefit plans	0	0	0
Deferred issuance costs and discounts on long-term debt	0	0	0
Loss on divestiture of assets	0
Disposal of plant and equipment, net	0	0	0
Non-cash adjustments to unrecognized taxes	0	0	0
Changes in working capital, net	0	0	0
Change in taxes receivable, net	12,099	-22,352	0
Excess tax benefits from equity-based payment arrangements	0		0
Change in non-current accrued taxes, net	0	0	0
Funding of qualified pension plans	0	0	0
Other, net	0	0	0
Net cash flows from operating activities	81,124	16,964	6,969
CASH FLOWS FROM INVESTING ACTIVITIES
Change in short-term investments, net	0	0	0
Additions to plant and equipment	0	0	0
Cash paid for acquisitions, net of cash acquired			0
Proceeds from divested assets	0
Proceeds from sale of assets	0		0
Net cash flows from investing activities	0	0	0
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from long-term debt	0	0
Repayment of long-term debt	0	0
Purchase of treasury stock	0	0	0
Investment (to) from Parent	-81,124	-16,964	-6,969
Payments for long-term debt issuance costs	0	0	0
Excess tax benefits from equity-based payment arrangements	0		0
Payment of tax withholdings on equity-based payment arrangements	0	0	0
Other, net	0		0
Net cash flows from financing activities	-81,124	-16,964	-6,969
Increase in cash	0	0	0
Cash at beginning of period	0	0	0
Cash at end of period	$0	$0	$0