Clearwater Paper (CLW) 10-Q 30 Apr 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 23, 2014
Document and Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Trading Symbol	'CLW	'
Entity Registrant Name	'CLEARWATER PAPER CORP	'
Entity Central Index Key	'0001441236	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	20,421,204

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]	'	'
Net sales	$484,920	$460,824
Costs and expenses:	'	'
Cost of sales	-426,629	-414,209
Selling, general and administrative expenses	-33,514	-34,132
Asset Impairment Charges	-4,259	0
Total operating costs and expenses	-464,402	-448,341
Income from operations	20,518	12,483
Interest expense, net	-10,734	-10,982
Gains (Losses) on Extinguishment of Debt	0	-17,058
Earnings (loss) before income taxes	9,784	-15,557
Income tax provision	-3,558	14,675
Net earnings (loss)	$6,226	($882)
Net earnings per common share:	'	'
Basic (in dollars per share)	$0.30	($0.04)
Diluted (in dollars per share)	$0.29	($0.04)

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Net earnings	$6,226		($882)
Defined benefit pension and other postretirement employee benefits:	'		'
Amortization of actuarial loss included in net periodic cost, net of tax expense of $1,190, $818, $3,571 and $2,452	1,529		2,624
Amortization of prior service credit included in net periodic cost, net of tax benefit of $202, $59, $605 and $176	45		163
Other comprehensive income (loss), net of tax	1,484	[1]	2,461	[1]
Comprehensive income	$7,710		$1,579
[1]	For the three months ended March 31, 2014 and 2013, net periodic costs associated with our pension and other postretirement employee benefit, or OPEB, plans included in other comprehensive income and reclassified from accumulated other comprehensive loss includes $2.5 million and $4.3 million, respectively, of actuarial loss amortization and $0.1 million and $0.3 million, respectively, related to prior service credit, net of tax of $0.9 million and $1.6 million, respectively. These accumulated other comprehensive loss components are included in the computation of net periodic pension and OPEB costs in Note 10, “Pension and Other Postretirement Employee Benefit Plans.”

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Amortization of actuarial loss included in net periodic cost, tax expense	$965	$1,706
Amortization of prior service credit included in net periodic cost, tax benefit	($29)	($107)

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash	$24,042	$23,675
Restricted cash	1,500	1,500
Short-term investments	59,000	70,000
Receivables, net	169,052	158,874
Taxes receivable	4,980	10,503
Inventories	269,249	267,788
Deferred tax assets	37,257	37,538
Prepaid expenses	10,501	5,523
Total current assets	575,581	575,401
Property, plant and equipment, net	875,955	884,698
Goodwill	229,533	229,533
Intangible assets, net	37,803	40,778
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent	7,732	4,488
Other assets, net	9,585	9,927
TOTAL ASSETS	1,736,189	1,744,825
Current liabilities:	'	'
Accounts payable and accrued liabilities	205,438	190,648
Current liability for pensions and other postretirement employee benefits	8,778	8,778
Total current liabilities	214,216	199,426
Long-term debt	650,000	650,000
Liability for pensions and other postretirement employee benefits	107,402	109,807
Other long-term obligations	50,825	52,942
Accrued taxes	2,677	2,658
Deferred tax liabilities	126,726	124,898
Stockholders' equity:	'	'
Preferred stock, par value $0.0001 per share, 5,000,000 authorized shares, no shares issued	'	'
Common stock, par value $0.0001 per share, 100,000,000 authorized shares, 23,825,750 and 23,101,710 shares issued	2	2
Additional paid-in capital	327,417	326,546
Retained earnings	472,865	466,639
Treasury stock, at cost, common shares-622,082 and 333,300 shares repurchased	-159,332	-130,000
Accumulated other comprehensive loss, net of tax	-56,609	-58,093
Total stockholders' equity	584,343	605,094
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$1,736,189	$1,744,825

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Preferred stock, par value (in dollars 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 value (in dollars per share)	$0.00	$0.00
Common stock, authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	24,030,815	24,007,581
Treasury stock, shares (in shares)	3,382,224	2,923,640

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net earnings	$6,226	($882)
Adjustments to reconcile net earnings to net cash provided by operating activities:	'	'
Depreciation and amortization	22,231	22,151
Equity-based compensation expense	4,479	4,785
Asset Impairment Charges	4,259	0
Deferred tax expense	1,173	-12,614
Employee benefit plans	888	2,693
Amortization of Financing Costs and Discounts	475	3,544
Gain (Loss) on Disposition of Assets	429	0
Changes in working capital, net	-5,656	-9,868
Change in taxes receivable, net	5,523	9,547
Change in non-current accrued taxes	19	-3,177
Funding of qualified pension plans	-4,314	-3,026
Other Operating Activities, Cash Flow Statement	-462	361
Net cash provided by operating activities	35,270	13,514
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Change in short-term investments, net	11,000	-65,000
Additions to plant and equipment	-16,239	-19,471
Proceeds from Sale of Productive Assets	460	0
Net cash used for investing activities	-4,779	-84,471
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Proceeds from Issuance of Long-term Debt	0	275,000
Repayment of Cellu Tissue debt	0	-150,000
Purchase of treasury stock	-29,332	-50,166
Payments of Debt Issuance Costs	0	-4,723
Payment of tax withholdings on equity-based payment arrangements	-792	-2,195
Net cash (used for) provided by financing activities	-30,124	67,916
Increase in cash	367	-3,041
Cash at beginning of period	23,675	12,579
Cash at end of period	24,042	9,538
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:	'	'
Cash paid for interest, net of amounts capitalized	6,188	2,966
Cash paid for income taxes	1,009	967
Cash received from income tax refunds	4,133	631
Capital Expenditures Incurred but Not yet Paid	($1,489)	$2,213

Nature_of_Operations_and_Basis

Nature of Operations and Basis of Presentation	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Nature of Operations and Basis of Presentation	'
	Nature of Operations and Basis of Presentation
	GENERAL
	Clearwater Paper Corporation is a leading North American producer of private label tissue and paperboard products. We manufacture quality consumer tissue, away-from-home tissue, parent rolls (non-converted tissue product), machine-glazed tissue, bleached paperboard and pulp at 13 manufacturing locations in the U.S. and Canada. Our private label consumer tissue products - facial and bath tissue, paper towels and napkins - are used primarily at-home and are principally sold to major retailers and wholesale distributors, which include grocery, drug, mass-merchant and discount stores. Our paperboard is sold primarily in the high-end segment of the packaging industry, which demands high-quality construction and print surfaces for graphics.
	On February 17, 2014, we announced the permanent and immediate closure of our Long Island, New York, tissue converting and distribution facility. As of March 31, 2014, we have incurred $8.4 million of costs associated with the closure.
	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 ceasing at the end of 2013. As of March 31, 2014, we have incurred $6.7 million of costs associated with the closure, of which $0.8 million was incurred during the first quarter of 2014.
	FINANCIAL STATEMENT PREPARATION AND PRESENTATION
	The accompanying Consolidated Balance Sheets at March 31, 2014 and December 31, 2013, the related Consolidated Statements of Operations and Comprehensive Income for the three months ended March 31, 2014 and 2013, and the Consolidated Statements of Cash Flows for the three months ended March 31, 2014 and 2013, have been prepared in conformity with accounting principles generally accepted in the United States of America, or GAAP. We believe that all adjustments necessary for a fair statement of the results of the interim periods presented have been included. The results of operations for any interim period are not necessarily indicative of the results of operations to be expected for the full year.
	This Quarterly Report on Form 10-Q should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2013, as filed with the Securities and Exchange Commission, or SEC, on February 20, 2014.
	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	SIGNIFICANT ESTIMATES
	The preparation of financial statements in conformity with 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 periods. Significant areas requiring the use of estimates and measurement of uncertainty include determination of net realizable value for deferred tax assets, uncertain tax positions, assessment of impairment of long-lived assets, goodwill and intangibles, assessment of environmental matters, 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 March 31, 2014 and 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 March 31, 2014 and December 31, 2013, we had allowances for doubtful accounts of $2.0 million and $1.9 million, respectively.
	PROPERTY, PLANT AND EQUIPMENT
	Property, plant and equipment are stated at cost, including any interest costs capitalized, less accumulated depreciation. Depreciation of buildings, equipment and other depreciable assets is determined using the straight-line method. Assets we acquire through business combinations have estimated lives that are typically shorter than the assets we construct or buy new. Accumulated depreciation totaled $1,492.3 million and $1,476.4 million at March 31, 2014 and December 31, 2013, respectively.
	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 a $3.0 million non-cash impairment charge to our accompanying Consolidated Statement of Operations. There were no other such events or changes in circumstances that impacted our remaining long-lived assets.
	STOCKHOLDERS’ EQUITY
	On February 5, 2014, we announced that our Board of Directors had approved a new stock repurchase program authorizing the repurchase of up to $100.0 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. During the first quarter of 2014, we repurchased 458,584 shares of our outstanding common stock at an average price of $63.96 per share. As of March 31, 2014, we had up to $70.7 million of authorization remaining pursuant to our stock repurchase program.
	On January 17, 2013, we announced that our Board of Directors had approved a stock repurchase program authorizing the repurchase of up to $100.0 million of our common stock, which was completed in 2013. On March 1, 2013, we entered into an accelerated stock buyback, or ASB, agreement with a major financial institution to repurchase an aggregate of $50.0 million of our outstanding common stock. In total, 1,039,513 shares of our outstanding common stock were delivered under the ASB agreement at an average repurchase price of $48.10 per share. In addition to the ASB agreement, we also made repurchases of 1,030,657 shares of our outstanding common stock on the open market at a total cost of $50.0 million, representing an an average price of $48.51 per share.
	DERIVATIVES
	We had no activity during the three months ended March 31, 2014 and 2013 that required hedge or derivative accounting treatment. To help mitigate our exposure to market risk for changes in utility commodity pricing, from time to time we have used firm price contracts to supply a portion of the natural gas requirements for our manufacturing facilities. As of March 31, 2014, these contracts covered approximately 10% of our expected average monthly natural gas requirements for the remainder of 2014. Historically, these contracts have qualified for treatment as “normal purchases or normal sales” under authoritative guidance and thus required no mark-to-market adjustment.

Recently_Adopted_and_New_Accou

Recently Adopted and New Accounting Standards	3 Months Ended
	Mar. 31, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
Recently Adopted and New Accounting Standards	'
	Recently Adopted and New Accounting Standards
	In July 2013, the Financial Accounting Standards Board issued Accounting Standard Update, or 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 has not impacted 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.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	Inventories
	Inventories at the balance sheet dates consist of:
	(In thousands)	March 31,		December 31,
		2014		2013
	Pulp, paperboard and tissue products	$	184,330	$	182,715
	Materials and supplies	72,481		69,836
	Logs, pulpwood, chips and sawdust	12,438		15,237
		$	269,249	$	267,788

Intangible_Assets

Intangible Assets	3 Months Ended
	Mar. 31, 2014
Finite-Lived Intangible Assets, Net [Abstract]	'
Intangible Assets	'
	Intangible Assets
	Intangible assets at the balance sheet dates are comprised of the following:
		March 31, 2014
	(Dollars in thousands, lives in years)	Useful	Historical		Accumulated			Net
		Life	Cost		Amortization			Balance
	Customer relationships	9	$	53,957	$	(18,731	)	$	35,226
	Trade names and trademarks	10	3,393		(1,103		)	2,290
	Non-compete agreements	2.5 - 5.0	1,189		(902		)	287
			$	58,539	$	(20,736	)	$	37,803
		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
			$	60,931	$	(20,153	)	$	40,778
	As a result of the closure of our Long Island converting and distribution facility, we performed an assessment of the recoverability of our intangible assets by utilizing the income approach, which discounts projected future cash flows based on management’s expectations of the current and future operating environment. 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. In addition, fully amortized non-compete agreements related to the Long Island facility were also disposed. There were no other such events or changes in circumstances that impacted our remaining definite-lived intangible assets.

Taxes

Taxes	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Taxes	'
	Income Taxes
	Consistent with authoritative guidance, our estimated annual effective tax rate is used to allocate our expected annual income tax provision to interim periods. The rate is the ratio of our estimated annual income tax provision to our estimated pre-tax ordinary income, and excludes "discrete items," which are significant, unusual or infrequent items reported separately net of their related tax effect. The estimated annual effective tax rate is applied to the current interim period’s ordinary income to determine the income tax provision allocated to the interim period. The income tax effects of discrete items are then determined separately and recognized in the interim period in which the income or expense items arise.
	For the three months ended March 31, 2014 and 2013, the effective tax rates attributable to continuing operations were as follows:
		Three Months Ended March 31,
		2014		2013
	Statutory federal income tax rate	35	%	35	%
	State taxes, net of credits	2		0.5
	Change in valuation allowances	4.2		3
	Federal manufacturing deduction	(2.0	)	(1.1	)
	Increase in uncertain tax positions	—		(3.1	)
	Interest accrued on uncertain tax positions	0.2		(3.0	)
	Cellulosic Biofuel Producer Credit conversion	—		62.9
	Federal credits	(4.4	)	(1.5	)
	State rate adjustment	(0.2	)	0.8
	Return to provision adjustments	0.9		0.2
	Other	0.7		0.6
	Effective tax rate	36.4	%	94.3	%
	Our estimated annual effective tax rate for the first quarter of 2014 is approximately 36%, compared with approximately 37% for the comparable interim period in 2013. The decline in the effective tax rate is due to an increase in the benefit from the federal manufacturing deduction and an increase in the benefit from state income tax rates.
	During the fourth quarter of 2012, the IRS commenced an audit of our tax returns for the tax years ending December 31, 2008 through December 31, 2012. This audit has moved into final review stages with the Joint Committee on Taxation. We expect to receive final approval with no additional changes from the Committee in 2014. As a result, we have recognized an additional deferred tax asset of $0.4 million and a tax benefit of the same amount.
	During the second quarter of 2013, the IRS commenced an audit of our wholly-owned subsidiary, Cellu Tissue Holdings, Inc., and its subsidiaries for the year ended December 27, 2010, the period immediately before our acquisition of Cellu Tissue Holdings, Inc. During the first quarter of 2014, we successfully closed the audit of Cellu Tissue Holdings, Inc.

Accounts_Payable_and_Accrued_L

Accounts Payable and Accrued Liabilities	3 Months Ended
	Mar. 31, 2014
Accounts Payable and Accrued Liabilities [Abstract]	'
Accounts Payable and Accrued Liabilities	'
	Accounts Payable and Accrued Liabilities
	Accounts payable and accrued liabilities at the balance sheet dates consist of:
	(In thousands)	March 31, 2014		December 31, 2013
	Trade accounts payable	$	114,965	$	108,192
	Accrued wages, salaries and employee benefits	43,294		38,563
	Accrued interest	13,252		9,691
	Accrued taxes other than income taxes payable	8,387		6,322
	Accrued utilities	7,938		8,309
	Accrued discounts and allowances	5,427		6,410
	Other	12,175		13,161
		$	205,438	$	190,648

Debt

Debt	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Debt	'
	Debt
	SENIOR NOTES
	On October 22, 2010, we sold $375 million aggregate principal amount of senior notes, which we refer to as the 2010 Notes. The 2010 Notes mature on November 1, 2018, have an interest rate of 7.125% and were issued at their face value. On January 23, 2013, we sold $275 million aggregate principal amount of senior notes, 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 also issued at their face value.
	The 2010 Notes and 2013 Notes are both guaranteed by all of our direct and indirect domestic subsidiaries, and 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 indentures governing these notes. These 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. In addition, both 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 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.
	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 March 31, 2014, there were no borrowings outstanding under the credit facility, but approximately $6.9 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 March 31, 2014, we would have been permitted to draw approximately $118.1 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 March 31, 2014, the fixed charge coverage ratio for the most recent four quarters was 3.3-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	3 Months Ended
	Mar. 31, 2014
Other Liabilities, Noncurrent [Abstract]	'
Other Long-Term Obligations	'
	Other Long-Term Obligations
	Other long-term obligations at the balance sheet dates consist of:
	(In thousands)	March 31, 2014		December 31, 2013
	Long-term lease obligations, net of current portion	$	24,734	$	24,815
	Deferred compensation	12,889		14,149
	Deferred proceeds	10,681		11,205
	Other	2,521		2,773
		$	50,825	$	52,942

Reclassification_out_of_Accumu

Reclassification out of Accumulated Other Comprehensive Income (Notes)	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Accumulated Other Comprehensive Income [Text Block]	'
	Accumulated Other Comprehensive Loss
	Accumulated other comprehensive loss, net of tax, is comprised of the following:
	(In thousands)	Foreign Currency Translation Adjustments1			Pension and Other Post Retirement Employee Benefit Plans Adjustments			Total
	Balance at December 31, 2013	$	(874	)	$	(57,219	)	$	(58,093	)
	Other comprehensive income, net of tax2	—			1,484			1,484
	Balance at March 31, 2014	$	(874	)	$	(55,735	)	$	(56,609	)
	(In thousands)	Foreign Currency Translation Adjustments1			Pension and Other Post Retirement Employee Benefit Plans Adjustments			Total
	Balance at December 31, 2012	$	(874	)	$	(114,819	)	$	(115,693	)
	Other comprehensive income, net of tax2	—			2,461			2,461
	Balance at March 31, 2013	$	(874	)	$	(112,358	)	$	(113,232	)
	1	This balance consists of unrealized foreign currency translation adjustments related to the operations of our Canadian subsidiary before its functional currency was changed from Canadian dollars to U.S. dollars in 2012.
	2	For the three months ended March 31, 2014 and 2013, net periodic costs associated with our pension and other postretirement employee benefit, or OPEB, plans included in other comprehensive income and reclassified from accumulated other comprehensive loss includes $2.5 million and $4.3 million, respectively, of actuarial loss amortization and $0.1 million and $0.3 million, respectively, related to prior service credit, net of tax of $0.9 million and $1.6 million, respectively. These accumulated other comprehensive loss components are included in the computation of net periodic pension and OPEB costs in Note 10, “Pension and Other Postretirement Employee Benefit Plans.”

Pension_and_Other_Postretireme

Pension and Other Postretirement Employee Benefit Plans	3 Months Ended
	Mar. 31, 2014
Compensation and Retirement Disclosure [Abstract]	'
Pension and Other Postretirement Employee Benefit Plans	'
	Pension and Other Postretirement Employee Benefit Plans
	The following table details the components of net periodic cost of our company-sponsored pension and OPEB plans for the periods presented:
		Three Months Ended March 31,
	(In thousands)	2014			2013			2014			2013
		Pension Benefit Plans						Other Postretirement
								Employee  Benefit Plans
	Service cost	$	355		$	485		$	117		$	206
	Interest cost	3,688			3,359			1,302			1,318
	Expected return on plan assets	(5,015		)	(4,568		)	—			—
	Amortization of prior service cost (credit)	52			111			(126		)	(381		)
	Amortization of actuarial loss	2,494			3,874			—			456
	Net periodic cost	$	1,574		$	3,261		$	1,293		$	1,599
	We are required to make contributions to our qualified pension plans. During the three months ended March 31, 2014, we contributed $4.3 million to these pension plans. In April 2014, we contributed an additional $4.6 million, and we expect to make additional contributions totaling approximately $10 million in the remainder of 2014.
	During the three months ended March 31, 2014, we made contributions of approximately $0.2 million to our company-sponsored non-qualified pension plan, and we estimate contributions will total approximately $0.5 million in 2014. We do not anticipate funding our OPEB plans in 2014 except to pay benefit costs as incurred during the year by plan participants.
	During the three months ended March 31, 2014, $2.3 million of net periodic pension and OPEB costs were charged to cost of sales, and $0.6 million was charged to selling, general and administrative expenses in the accompanying Consolidated Statements of Operations, as compared to $4.1 million and $0.8 million, respectively, for the period ended March 31, 2013.

Earnings_per_Common_Share

Earnings per Common Share	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Earnings per Common Share	'
	Earnings per Common Share
	Basic 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 three months ended March 31, 2013, 514,318 of our incremental shares related to restricted stock units and performance shares were excluded from our earnings per share calculation due to their anti-dilutive effect as a result of our net loss from operations during the first quarter of 2013. We also evaluated the derivative contracts associated with the ASB agreement discussed in Note 1, "Nature of Operations and Basis of Presentation," which could have resulted in the issuance of shares to the engaged financial institution at the settlement date, and determined there was no impact on earnings per share or anti-dilutive shares for the period ended March 31, 2013.
	The following table reconciles the number of common shares used in calculating the basic and diluted net earnings per share:
		Three Months Ended March 31,
		2014		2013
	Basic average common shares outstanding1	20,984,217		22,884,065
	Incremental shares due to:
	Restricted stock units	67,358		—
	Performance shares	167,329		—
	Stock options	—		—
	Diluted average common shares outstanding	21,218,904		22,884,065
	Basic net earnings (loss) per common share	$	0.3	$	(0.04	)
	Diluted net earnings (loss) per common share	0.29		(0.04		)
	Anti-dilutive shares excluded from calculation	242,244		514,318
	1	Basic average common shares outstanding include restricted stock awards that are fully vested, but are deferred for future issuance.

EquityBased_Compensation

Equity-Based Compensation	3 Months Ended
	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Equity-Based Compensation	'
	Equity-Based Compensation
	We recognize equity-based compensation expense for all equity-based payment awards made to employees and directors, including restricted stock units, performance shares and stock options, based on estimated fair values.
	EMPLOYEE AWARDS
	Employee equity-based compensation expense was recognized as follows:
		Three Months Ended March 31,
	(In thousands)	2014			2013
	Restricted stock units	$	445		$	375
	Performance shares	1,081			938
	Stock options	136			—
	Total employee equity-based compensation	$	1,662		$	1,313
	During the first quarter of 2014, 38,319 previously deferred RSU shares were distributed. All of these shares 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 of the deferred shares, a net 23,234 shares were issued during the first quarter of 2014. The minimum tax withholdings payment made in 2014 in connection with the issued shares was $0.8 million.
	In addition to RSUs and performance shares, in the first quarter of 2014 stock options were granted to certain employees. In total, stock options to purchase a total of 160,671 shares were granted with a weighted-average exercise price of $66.95 and a fair value, estimated under the Black-Scholes valuation model, of $22.99 per share underlying the option.
	The following table summarizes the number of share-based awards granted under the Clearwater Paper Corporation 2008 Stock Incentive Plan during the three months ended March 31, 2014 and the grant-date fair value of the awards:
		Three Months Ended
		31-Mar-14
		Number of		Average Fair Value of
		Shares Subject to Award		Award Per Share
	Restricted stock units	28,016		$	66.98
	Performance shares	53,557		105.08
	Stock options	160,671		22.99
	DIRECTOR AWARDS
	Annually, each outside member of our Board of Directors receives deferred equity-based awards that are measured in units of our common stock and ultimately settled in cash at the time of payment. Accordingly, the compensation expense associated with these awards is subject to fluctuations each quarter based on mark-to-market adjustments at each reporting period in line with changes in the market price of our common stock. As a result of the mark-to-market adjustment, we recorded director equity-based compensation expense of approximately $2.8 million for the three months ended March 31, 2014, compared to equity-based compensation expense of approximately $3.5 million for the same period in 2013.
	As of March 31, 2014, the liability amounts associated with director equity-based compensation included in "Other long-term obligations" and "Accounts payable and accrued liabilities" on the accompanying Consolidated Balance Sheets were $11.9 million and $4.1 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	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	The estimated fair values of our financial instruments at the dates presented below are as follows:
		March 31,				December 31,
		2014				2013
		Carrying		Fair		Carrying		Fair
	(In thousands)	Amount		Value		Amount		Value
	Cash, short-term investments and restricted cash (Level 1)	$	84,573	$	84,573	$	95,206	$	95,206
	Long-term debt (Level 1)	650,000		661,563		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.

Segment_Information

Segment Information	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	Segment Information
	The table below presents information about our reportable segments:
		Three Months Ended March 31,
	(In thousands)	2014			2013
	Segment net sales1:
	Consumer Products	$	286,508		$	284,902
	Pulp and Paperboard	198,412			175,922
	Total segment net sales	$	484,920		$	460,824
	Operating (loss) income:
	Consumer Products	$	(523	)	$	10,124
	Pulp and Paperboard	36,776			17,553
		36,253			27,677
	Corporate	(15,735		)	(15,194		)
	Income from operations	$	20,518		$	12,483
	Depreciation and amortization:
	Consumer Products	$	15,490		$	16,092
	Pulp and Paperboard	6,270			5,659
	Corporate	471			400
	Total depreciation and amortization	$	22,231		$	22,151
	1	In 2013, pulp not utilized internally was sold by the Pulp and Paperboard segment to external customers resulting in $1.2 million in first quarter 2013 net sales. Commencing in 2014, all excess pulp is sold by the Consumer Products segment and totaled $0.4 million in the first quarter.

Supplemental_Guarantor_Financi

Supplemental Guarantor Financial Information	3 Months Ended
	Mar. 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 2013 Notes and the 2010 Notes on a joint and several basis. As of March 31, 2014, the 2013 Notes and 2010 Notes were not guaranteed by Interlake Acquisition Corporation Limited, a foreign subsidiary. There are no significant restrictions on the ability of the guarantor subsidiaries to make distributions to Clearwater Paper, the issuer of the 2013 Notes and 2010 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
	Three Months Ended March 31, 2014
					Guarantor			Non-Guarantor
	(In thousands)	Issuer			Subsidiaries			Subsidiary			Eliminations			Total
	Net sales	$	368,331		$	117,377		$	6,513		$	(7,301	)	$	484,920
	Cost and expenses:
	Cost of sales	(302,102		)	(124,793		)	(7,035		)	7,301			(426,629		)
	Selling, general and administrative expenses	(27,659		)	(5,517		)	(338		)	—			(33,514		)
	Impairment of assets	—			(4,259		)	—			—			(4,259		)
	Total operating costs and expenses	(329,761		)	(134,569		)	(7,373		)	7,301			(464,402		)
	Income (loss) from operations	38,570			(17,192		)	(860		)	—			20,518
	Interest expense, net	(10,723		)	(11		)	—			—			(10,734		)
	Earnings (loss) before income taxes	27,847			(17,203		)	(860		)	—			9,784
	Income tax (provision) benefit	(13,477		)	9,372			206			341			(3,558		)
	Equity in loss of subsidiary	(8,485		)	(654		)	—			9,139			—
	Net earnings (loss)	$	5,885		$	(8,485	)	$	(654	)	$	9,480		$	6,226
	Other comprehensive income, net of tax	1,484			—			—			—			1,484
	Comprehensive income (loss)	$	7,369		$	(8,485	)	$	(654	)	$	9,480		$	7,710
	Clearwater Paper Corporation
	Consolidating Statement of Operations and Comprehensive Income
	Three Months Ended March 31, 2013
					Guarantor			Non-Guarantor
	(In thousands)	Issuer			Subsidiaries			Subsidiary			Eliminations			Total
	Net sales	$	344,248		$	114,716		$	6,855		$	(4,995	)	$	460,824
	Cost and expenses:
	Cost of sales	(302,351		)	(110,657		)	(6,196		)	4,995			(414,209		)
	Selling, general and administrative expenses	(27,908		)	(5,734		)	(490		)	—			(34,132		)
	Total operating costs and expenses	(330,259		)	(116,391		)	(6,686		)	4,995			(448,341		)
	Income (loss) from operations	13,989			(1,675		)	169			—			12,483
	Interest expense, net	(10,982		)	—			—			—			(10,982		)
	Debt retirement costs	(17,058		)	—			—			—			(17,058		)
	(Loss) earnings before income taxes	(14,051		)	(1,675		)	169			—			(15,557		)
	Income tax benefit (provision)	14,342			1,213			(35		)	(845		)	14,675
	Equity in (loss) income of subsidiary	(328		)	134			—			194			—
	Net (loss) earnings	$	(37	)	$	(328	)	$	134		$	(651	)	$	(882	)
	Other comprehensive income, net of tax	2,461			—			—			—			2,461
	Comprehensive income (loss)	$	2,424		$	(328	)	$	134		$	(651	)	$	1,579
	Clearwater Paper Corporation
	Consolidating Balance Sheet
	At March 31, 2014
	(In thousands)	Issuer			Guarantor			Non-Guarantor			Eliminations			Total
					Subsidiaries			Subsidiary
	ASSETS
	Current assets:
	Cash	$	21,267		$	—		$	2,775		$	—		$	24,042
	Restricted cash	1,500			—			—			—			1,500
	Short-term investments	59,000			—			—			—			59,000
	Receivables, net	125,334			41,009			3,106			(397		)	169,052
	Taxes receivable	5,674			(1,253		)	403			156			4,980
	Inventories	204,803			58,047			6,399			—			269,249
	Deferred tax assets	28,623			8,441			7			186			37,257
	Prepaid expenses	9,735			634			132			—			10,501
	Total current assets	455,936			106,878			12,822			(55		)	575,581
	Property, plant and equipment, net	633,696			225,796			16,463			—			875,955
	Goodwill	229,533			—			—			—			229,533
	Intangible assets, net	6,008			30,689			1,106			—			37,803
	Intercompany receivable (payable)	102,891			(87,026		)	(15,523		)	(342		)	—
	Investment in subsidiary	187,624			4,921			—			(192,545		)	—
	Pension assets	7,732			—			—			—			7,732
	Other assets, net	8,438			1,147			—			—			9,585
TOTAL ASSETS	$	1,631,858		$	282,405		$	14,868		$	(192,942	)	$	1,736,189
LIABILITIES AND STOCKHOLDERS’
EQUITY
Current liabilities:
Accounts payable and accrued	$	159,880		$	38,893		$	7,062		$	(397	)	$	205,438
liabilities
Current liability for pensions and	8,778			—			—			—			8,778
other postretirement employee
benefits
Total current liabilities	168,658			38,893			7,062			(397		)	214,216
Long-term debt	650,000			—			—			—			650,000
Liability for pensions and other	107,402			—			—			—			107,402
postretirement employee benefits
Other long-term obligations	49,728			1,097			—			—			50,825
Accrued taxes	1,440			919			318			—			2,677
Deferred tax liabilities	70,287			53,872			2,567			—			126,726
Accumulated other comprehensive loss,	(56,609		)	—			—			—			(56,609		)
net of tax
Stockholders’ equity excluding	640,952			187,624			4,921			(192,545		)	640,952
accumulated other comprehensive loss
TOTAL LIABILITIES AND	$	1,631,858		$	282,405		$	14,868		$	(192,942	)	$	1,736,189
STOCKHOLDERS’ EQUITY
Clearwater Paper Corporation
Consolidating Balance Sheet
At December 31, 2013
(In thousands)	Issuer			Guarantor			Non-Guarantor			Eliminations			Total
				Subsidiaries			Subsidiary
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
Three Months Ended March 31, 2014
(In thousands)	Issuer			Guarantor			Non-Guarantor			Eliminations			Total
				Subsidiaries			Subsidiary
CASH FLOWS FROM OPERATING
ACTIVITIES
Net earnings (loss)	$	5,885		$	(8,485	)	$	(654	)	$	9,480		$	6,226
Adjustments to reconcile net earnings (loss) to
net cash flows from operating activities:
Depreciation and amortization	14,121			7,529			581			—			22,231
Equity-based compensation expense	4,479			—			—			—			4,479
Impairment of assets	—			4,259			—			—			4,259
Deferred tax provision (benefit)	23,679			(11,492		)	22			(11,036		)	1,173
Employee benefit plans	888			—			—			—			888
Deferred issuance costs and discounts on	475			—			—			—			475
long-term debt
Disposal of plant and equipment, net	139			290			—			—			429
Changes in working capital, net	(1,059		)	(3,062		)	(1,535		)	—			(5,656		)
Changes in taxes receivable, net	(1,965		)	(14,629		)	(79		)	22,196			5,523
Changes in non-current accrued taxes, net	10			8			1			—			19
Funding of qualified pension plans	(4,314		)	—			—			—			(4,314		)
Other, net	(361		)	(101		)	—			—			(462		)
Net cash flows from operating activities	41,977			(25,683		)	(1,664		)	20,640			35,270
CASH FLOWS FROM INVESTING
ACTIVITIES
Changes in short-term investments, net	11,000			—			—			—			11,000
Additions to plant and equipment	(12,017		)	(4,168		)	(54		)	—			(16,239		)
Proceeds from the sale of assets	4			456			—			—			460
Net cash flows from investing activities	(1,013		)	(3,712		)	(54		)	—			(4,779		)
CASH FLOWS FROM FINANCING
ACTIVITIES
Purchase of treasury stock	(29,332		)	—			—			—			(29,332		)
Investment (to) from parent	(7,846		)	29,395			(909		)	(20,640		)	—
Payment of tax withholdings on equity-	(792		)	—			—			—			(792		)
based payment arrangements
Net cash flows from financing activities	(37,970		)	29,395			(909		)	(20,640		)	(30,124		)
Increase (decrease) in cash	2,994			—			(2,627		)	—			367
Cash at beginning of period	18,273			—			5,402			—			23,675
Cash at end of period	$	21,267		$	—		$	2,775		$	—		$	24,042
Clearwater Paper Corporation
Consolidating Statement of Cash Flows
Three Months Ended March 31, 2013
(In thousands)	Issuer			Guarantor Subsidiaries			Non-Guarantor			Eliminations			Total
							Subsidiary
CASH FLOWS FROM OPERATING
ACTIVITIES
Net (loss) earnings	$	(37	)	$	(328	)	$	134		$	(651	)	$	(882	)
Adjustments to reconcile net (loss) earnings to net
cash flows from operating activities:
Depreciation and amortization	13,784			7,814			553			—			22,151
Equity-based compensation expense	4,785			—			—			—			4,785
Deferred tax benefit	(1,565		)	(11,700		)	(707		)	1,358			(12,614		)
Employee benefit plans	2,693			—			—			—			2,693
Deferred issuance costs and discounts on	3,544			—			—			—			3,544
long-term debt
Changes in working capital, net	(6,301		)	(2,629		)	(938		)	—			(9,868		)
Changes in taxes receivable, net	7,181			2,291			(203		)	278			9,547
Changes in non-current accrued taxes, net	(3,183		)	5			1			—			(3,177		)
Funding of qualified pension plans	(3,026		)	—			—			—			(3,026		)
Other, net	420			(59		)	—			—			361
Net cash flows from operating activities	18,295			(4,606		)	(1,160		)	985			13,514
CASH FLOWS FROM INVESTING
ACTIVITIES
Changes in short-term investments, net	(65,000		)	—			—			—			(65,000		)
Additions to plant and equipment	(16,575		)	(2,557		)	(339		)	—			(19,471		)
Net cash flows from investing activities	(81,575		)	(2,557		)	(339		)	—			(84,471		)
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	(50,166		)	—			—			—			(50,166		)
Investment (to) from parent	(8,500		)	7,160			2,325			(985		)	—
Payments for long-term debt issuance costs	(4,723		)	—			—			—			(4,723		)
Payment of tax withholdings on equity-	(2,195		)	—			—			—			(2,195		)
based payment arrangements
Net cash flows from financing activities	59,416			7,160			2,325			(985		)	67,916
(Decrease) increase in cash	(3,864		)	(3		)	826			—			(3,041		)
Cash at beginning of period	11,105			5			1,469			—			12,579
Cash at end of period	$	7,241		$	2		$	2,295		$	—		$	9,538

Nature_of_Operations_and_Basis1

Nature of Operations and Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
SIGNIFICANT ESTIMATES	'
	SIGNIFICANT ESTIMATES
	The preparation of financial statements in conformity with 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 periods. Significant areas requiring the use of estimates and measurement of uncertainty include determination of net realizable value for deferred tax assets, uncertain tax positions, assessment of impairment of long-lived assets, goodwill and intangibles, assessment of environmental matters, equity-based compensation and pension and postretirement obligation assumptions. Actual results could differ from those estimates and assumptions.
RESTRICTED CASH AND SHORT-TERM INVESTMENTS	'
	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 March 31, 2014 and 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 March 31, 2014 and December 31, 2013, we had allowances for doubtful accounts of $2.0 million and $1.9 million, respectively.
PROPERTY, PLANT AND EQUIPMENT	'
	PROPERTY, PLANT AND EQUIPMENT
	Property, plant and equipment are stated at cost, including any interest costs capitalized, less accumulated depreciation. Depreciation of buildings, equipment and other depreciable assets is determined using the straight-line method. Assets we acquire through business combinations have estimated lives that are typically shorter than the assets we construct or buy new. Accumulated depreciation totaled $1,492.3 million and $1,476.4 million at March 31, 2014 and December 31, 2013, respectively.
	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 a $3.0 million non-cash impairment charge to our accompanying Consolidated Statement of Operations. There were no other such events or changes in circumstances that impacted our remaining long-lived assets.
STOCKHOLDERS' EQUITY	'
	STOCKHOLDERS’ EQUITY
	On February 5, 2014, we announced that our Board of Directors had approved a new stock repurchase program authorizing the repurchase of up to $100.0 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. During the first quarter of 2014, we repurchased 458,584 shares of our outstanding common stock at an average price of $63.96 per share. As of March 31, 2014, we had up to $70.7 million of authorization remaining pursuant to our stock repurchase program.
	On January 17, 2013, we announced that our Board of Directors had approved a stock repurchase program authorizing the repurchase of up to $100.0 million of our common stock, which was completed in 2013. On March 1, 2013, we entered into an accelerated stock buyback, or ASB, agreement with a major financial institution to repurchase an aggregate of $50.0 million of our outstanding common stock. In total, 1,039,513 shares of our outstanding common stock were delivered under the ASB agreement at an average repurchase price of $48.10 per share. In addition to the ASB agreement, we also made repurchases of 1,030,657 shares of our outstanding common stock on the open market at a total cost of $50.0 million, representing an an average price of $48.51 per share.
DERIVATIVES	'
	DERIVATIVES
	We had no activity during the three months ended March 31, 2014 and 2013 that required hedge or derivative accounting treatment. To help mitigate our exposure to market risk for changes in utility commodity pricing, from time to time we have used firm price contracts to supply a portion of the natural gas requirements for our manufacturing facilities. As of March 31, 2014, these contracts covered approximately 10% of our expected average monthly natural gas requirements for the remainder of 2014. Historically, these contracts have qualified for treatment as “normal purchases or normal sales” under authoritative guidance and thus required no mark-to-market adjustment.

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Mar. 31, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	Inventories at the balance sheet dates consist of:
	(In thousands)	March 31,		December 31,
		2014		2013
	Pulp, paperboard and tissue products	$	184,330	$	182,715
	Materials and supplies	72,481		69,836
	Logs, pulpwood, chips and sawdust	12,438		15,237
		$	269,249	$	267,788

Intangible_Assets_Tables

Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2014
Finite-Lived Intangible Assets, Net [Abstract]	'
Intangible Assets	'
	Intangible assets at the balance sheet dates are comprised of the following:
		March 31, 2014
	(Dollars in thousands, lives in years)	Useful	Historical		Accumulated			Net
		Life	Cost		Amortization			Balance
	Customer relationships	9	$	53,957	$	(18,731	)	$	35,226
	Trade names and trademarks	10	3,393		(1,103		)	2,290
	Non-compete agreements	2.5 - 5.0	1,189		(902		)	287
			$	58,539	$	(20,736	)	$	37,803
		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
			$	60,931	$	(20,153	)	$	40,778

Taxes_Taxes_Tables

Taxes Taxes (Tables)	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	'
	For the three months ended March 31, 2014 and 2013, the effective tax rates attributable to continuing operations were as follows:
		Three Months Ended March 31,
		2014		2013
	Statutory federal income tax rate	35	%	35	%
	State taxes, net of credits	2		0.5
	Change in valuation allowances	4.2		3
	Federal manufacturing deduction	(2.0	)	(1.1	)
	Increase in uncertain tax positions	—		(3.1	)
	Interest accrued on uncertain tax positions	0.2		(3.0	)
	Cellulosic Biofuel Producer Credit conversion	—		62.9
	Federal credits	(4.4	)	(1.5	)
	State rate adjustment	(0.2	)	0.8
	Return to provision adjustments	0.9		0.2
	Other	0.7		0.6
	Effective tax rate	36.4	%	94.3	%

Accounts_Payable_and_Accrued_L1

Accounts Payable and Accrued Liabilities (Tables)	3 Months Ended
	Mar. 31, 2014
Accounts Payable and Accrued Liabilities [Abstract]	'
Accounts Payable and Accrued Liabilities	'
	Accounts payable and accrued liabilities at the balance sheet dates consist of:
	(In thousands)	March 31, 2014		December 31, 2013
	Trade accounts payable	$	114,965	$	108,192
	Accrued wages, salaries and employee benefits	43,294		38,563
	Accrued interest	13,252		9,691
	Accrued taxes other than income taxes payable	8,387		6,322
	Accrued utilities	7,938		8,309
	Accrued discounts and allowances	5,427		6,410
	Other	12,175		13,161
		$	205,438	$	190,648

Other_LongTerm_Obligations_Tab

Other Long-Term Obligations (Tables)	3 Months Ended
	Mar. 31, 2014
Other Liabilities, Noncurrent [Abstract]	'
Other Long-Term Obligations	'
	Other long-term obligations at the balance sheet dates consist of:
	(In thousands)	March 31, 2014		December 31, 2013
	Long-term lease obligations, net of current portion	$	24,734	$	24,815
	Deferred compensation	12,889		14,149
	Deferred proceeds	10,681		11,205
	Other	2,521		2,773
		$	50,825	$	52,942

Reclassification_out_of_Accumu1

Reclassification out of Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	'
	Accumulated other comprehensive loss, net of tax, is comprised of the following:
	(In thousands)	Foreign Currency Translation Adjustments1			Pension and Other Post Retirement Employee Benefit Plans Adjustments			Total
	Balance at December 31, 2013	$	(874	)	$	(57,219	)	$	(58,093	)
	Other comprehensive income, net of tax2	—			1,484			1,484
	Balance at March 31, 2014	$	(874	)	$	(55,735	)	$	(56,609	)
	(In thousands)	Foreign Currency Translation Adjustments1			Pension and Other Post Retirement Employee Benefit Plans Adjustments			Total
	Balance at December 31, 2012	$	(874	)	$	(114,819	)	$	(115,693	)
	Other comprehensive income, net of tax2	—			2,461			2,461
	Balance at March 31, 2013	$	(874	)	$	(112,358	)	$	(113,232	)
	1	This balance consists of unrealized foreign currency translation adjustments related to the operations of our Canadian subsidiary before its functional currency was changed from Canadian dollars to U.S. dollars in 2012.
	2	For the three months ended March 31, 2014 and 2013, net periodic costs associated with our pension and other postretirement employee benefit, or OPEB, plans included in other comprehensive income and reclassified from accumulated other comprehensive loss includes $2.5 million and $4.3 million, respectively, of actuarial loss amortization and $0.1 million and $0.3 million, respectively, related to prior service credit, net of tax of $0.9 million and $1.6 million, respectively. These accumulated other comprehensive loss components are included in the computation of net periodic pension and OPEB costs in Note 10, “Pension and Other Postretirement Employee Benefit Plans.”

Pension_and_Other_Postretireme1

Pension and Other Postretirement Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2014
Compensation and Retirement Disclosure [Abstract]	'
Components of Net Periodic Cost of Pension and Other Postretirement Employee Benefit Plans	'
	The following table details the components of net periodic cost of our company-sponsored pension and OPEB plans for the periods presented:
		Three Months Ended March 31,
	(In thousands)	2014			2013			2014			2013
		Pension Benefit Plans						Other Postretirement
								Employee  Benefit Plans
	Service cost	$	355		$	485		$	117		$	206
	Interest cost	3,688			3,359			1,302			1,318
	Expected return on plan assets	(5,015		)	(4,568		)	—			—
	Amortization of prior service cost (credit)	52			111			(126		)	(381		)
	Amortization of actuarial loss	2,494			3,874			—			456
	Net periodic cost	$	1,574		$	3,261		$	1,293		$	1,599

Earnings_per_Common_Share_Tabl

Earnings per Common Share (Tables)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted Net Earnings per Share	'
		Three Months Ended March 31,
		2014		2013
	Basic average common shares outstanding1	20,984,217		22,884,065
	Incremental shares due to:
	Restricted stock units	67,358		—
	Performance shares	167,329		—
	Stock options	—		—
	Diluted average common shares outstanding	21,218,904		22,884,065
	Basic net earnings (loss) per common share	$	0.3	$	(0.04	)
	Diluted net earnings (loss) per common share	0.29		(0.04		)
	Anti-dilutive shares excluded from calculation	242,244		514,318
	1	Basic average common shares outstanding include restricted stock awards that are fully vested, but are deferred for future issuance.

EquityBased_Compensation_Table

Equity-Based Compensation (Tables)	3 Months Ended
	Mar. 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:
		Three Months Ended March 31,
	(In thousands)	2014			2013
	Restricted stock units	$	445		$	375
	Performance shares	1,081			938
	Stock options	136			—
	Total employee equity-based compensation	$	1,662		$	1,313
Summary of Number of Share-Based Awards Granted	'
	The following table summarizes the number of share-based awards granted under the Clearwater Paper Corporation 2008 Stock Incentive Plan during the three months ended March 31, 2014 and the grant-date fair value of the awards:
		Three Months Ended
		31-Mar-14
		Number of		Average Fair Value of
		Shares Subject to Award		Award Per Share
	Restricted stock units	28,016		$	66.98
	Performance shares	53,557		105.08
	Stock options	160,671		22.99

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Estimated Fair Values of Financial Instruments	'
	The estimated fair values of our financial instruments at the dates presented below are as follows:
		March 31,				December 31,
		2014				2013
		Carrying		Fair		Carrying		Fair
	(In thousands)	Amount		Value		Amount		Value
	Cash, short-term investments and restricted cash (Level 1)	$	84,573	$	84,573	$	95,206	$	95,206
	Long-term debt (Level 1)	650,000		661,563		650,000		651,313

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Reportable Segments Information	'
	The table below presents information about our reportable segments:
		Three Months Ended March 31,
	(In thousands)	2014			2013
	Segment net sales1:
	Consumer Products	$	286,508		$	284,902
	Pulp and Paperboard	198,412			175,922
	Total segment net sales	$	484,920		$	460,824
	Operating (loss) income:
	Consumer Products	$	(523	)	$	10,124
	Pulp and Paperboard	36,776			17,553
		36,253			27,677
	Corporate	(15,735		)	(15,194		)
	Income from operations	$	20,518		$	12,483
	Depreciation and amortization:
	Consumer Products	$	15,490		$	16,092
	Pulp and Paperboard	6,270			5,659
	Corporate	471			400
	Total depreciation and amortization	$	22,231		$	22,151
	1	In 2013, pulp not utilized internally was sold by the Pulp and Paperboard segment to external customers resulting in $1.2 million in first quarter 2013 net sales. Commencing in 2014, all excess pulp is sold by the Consumer Products segment and totaled $0.4 million in the first quarter.

Supplemental_Guarantor_Financi1

Supplemental Guarantor Financial Information (Tables)	3 Months Ended
	Mar. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)	'
	basis.
	Clearwater Paper Corporation
	Consolidating Statement of Operations and Comprehensive Income
	Three Months Ended March 31, 2014
					Guarantor			Non-Guarantor
	(In thousands)	Issuer			Subsidiaries			Subsidiary			Eliminations			Total
	Net sales	$	368,331		$	117,377		$	6,513		$	(7,301	)	$	484,920
	Cost and expenses:
	Cost of sales	(302,102		)	(124,793		)	(7,035		)	7,301			(426,629		)
	Selling, general and administrative expenses	(27,659		)	(5,517		)	(338		)	—			(33,514		)
	Impairment of assets	—			(4,259		)	—			—			(4,259		)
	Total operating costs and expenses	(329,761		)	(134,569		)	(7,373		)	7,301			(464,402		)
	Income (loss) from operations	38,570			(17,192		)	(860		)	—			20,518
	Interest expense, net	(10,723		)	(11		)	—			—			(10,734		)
	Earnings (loss) before income taxes	27,847			(17,203		)	(860		)	—			9,784
	Income tax (provision) benefit	(13,477		)	9,372			206			341			(3,558		)
	Equity in loss of subsidiary	(8,485		)	(654		)	—			9,139			—
	Net earnings (loss)	$	5,885		$	(8,485	)	$	(654	)	$	9,480		$	6,226
	Other comprehensive income, net of tax	1,484			—			—			—			1,484
	Comprehensive income (loss)	$	7,369		$	(8,485	)	$	(654	)	$	9,480		$	7,710
	Clearwater Paper Corporation
	Consolidating Statement of Operations and Comprehensive Income
	Three Months Ended March 31, 2013
					Guarantor			Non-Guarantor
	(In thousands)	Issuer			Subsidiaries			Subsidiary			Eliminations			Total
	Net sales	$	344,248		$	114,716		$	6,855		$	(4,995	)	$	460,824
	Cost and expenses:
	Cost of sales	(302,351		)	(110,657		)	(6,196		)	4,995			(414,209		)
	Selling, general and administrative expenses	(27,908		)	(5,734		)	(490		)	—			(34,132		)
	Total operating costs and expenses	(330,259		)	(116,391		)	(6,686		)	4,995			(448,341		)
	Income (loss) from operations	13,989			(1,675		)	169			—			12,483
	Interest expense, net	(10,982		)	—			—			—			(10,982		)
	Debt retirement costs	(17,058		)	—			—			—			(17,058		)
	(Loss) earnings before income taxes	(14,051		)	(1,675		)	169			—			(15,557		)
	Income tax benefit (provision)	14,342			1,213			(35		)	(845		)	14,675
	Equity in (loss) income of subsidiary	(328		)	134			—			194			—
	Net (loss) earnings	$	(37	)	$	(328	)	$	134		$	(651	)	$	(882	)
	Other comprehensive income, net of tax	2,461			—			—			—			2,461
	Comprehensive income (loss)	$	2,424		$	(328	)	$	134		$	(651	)	$	1,579
	Clearwater Paper
Condensed Consolidating Balance Sheet	'
	Clearwater Paper Corporation
	Consolidating Balance Sheet
	At March 31, 2014
	(In thousands)	Issuer			Guarantor			Non-Guarantor			Eliminations			Total
					Subsidiaries			Subsidiary
	ASSETS
	Current assets:
	Cash	$	21,267		$	—		$	2,775		$	—		$	24,042
	Restricted cash	1,500			—			—			—			1,500
	Short-term investments	59,000			—			—			—			59,000
	Receivables, net	125,334			41,009			3,106			(397		)	169,052
	Taxes receivable	5,674			(1,253		)	403			156			4,980
	Inventories	204,803			58,047			6,399			—			269,249
	Deferred tax assets	28,623			8,441			7			186			37,257
	Prepaid expenses	9,735			634			132			—			10,501
	Total current assets	455,936			106,878			12,822			(55		)	575,581
	Property, plant and equipment, net	633,696			225,796			16,463			—			875,955
	Goodwill	229,533			—			—			—			229,533
	Intangible assets, net	6,008			30,689			1,106			—			37,803
	Intercompany receivable (payable)	102,891			(87,026		)	(15,523		)	(342		)	—
	Investment in subsidiary	187,624			4,921			—			(192,545		)	—
	Pension assets	7,732			—			—			—			7,732
	Other assets, net	8,438			1,147			—			—			9,585
	TOTAL ASSETS	$	1,631,858		$	282,405		$	14,868		$	(192,942	)	$	1,736,189
	LIABILITIES AND STOCKHOLDERS’
	EQUITY
	Current liabilities:
	Accounts payable and accrued	$	159,880		$	38,893		$	7,062		$	(397	)	$	205,438
	liabilities
	Current liability for pensions and	8,778			—			—			—			8,778
	other postretirement employee
	benefits
	Total current liabilities	168,658			38,893			7,062			(397		)	214,216
	Long-term debt	650,000			—			—			—			650,000
	Liability for pensions and other	107,402			—			—			—			107,402
	postretirement employee benefits
	Other long-term obligations	49,728			1,097			—			—			50,825
	Accrued taxes	1,440			919			318			—			2,677
	Deferred tax liabilities	70,287			53,872			2,567			—			126,726
	Accumulated other comprehensive loss,	(56,609		)	—			—			—			(56,609		)
	net of tax
	Stockholders’ equity excluding	640,952			187,624			4,921			(192,545		)	640,952
	accumulated other comprehensive loss
	TOTAL LIABILITIES AND	$	1,631,858		$	282,405		$	14,868		$	(192,942	)	$	1,736,189
	STOCKHOLDERS’ EQUITY
	Clearwater Paper Corporation
	Consolidating Balance Sheet
	At December 31, 2013
	(In thousands)	Issuer			Guarantor			Non-Guarantor			Eliminations			Total
					Subsidiaries			Subsidiary
	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
	Three Months Ended March 31, 2014
	(In thousands)	Issuer			Guarantor			Non-Guarantor			Eliminations			Total
					Subsidiaries			Subsidiary
	CASH FLOWS FROM OPERATING
	ACTIVITIES
	Net earnings (loss)	$	5,885		$	(8,485	)	$	(654	)	$	9,480		$	6,226
	Adjustments to reconcile net earnings (loss) to
	net cash flows from operating activities:
	Depreciation and amortization	14,121			7,529			581			—			22,231
	Equity-based compensation expense	4,479			—			—			—			4,479
	Impairment of assets	—			4,259			—			—			4,259
	Deferred tax provision (benefit)	23,679			(11,492		)	22			(11,036		)	1,173
	Employee benefit plans	888			—			—			—			888
	Deferred issuance costs and discounts on	475			—			—			—			475
	long-term debt
	Disposal of plant and equipment, net	139			290			—			—			429
	Changes in working capital, net	(1,059		)	(3,062		)	(1,535		)	—			(5,656		)
	Changes in taxes receivable, net	(1,965		)	(14,629		)	(79		)	22,196			5,523
	Changes in non-current accrued taxes, net	10			8			1			—			19
	Funding of qualified pension plans	(4,314		)	—			—			—			(4,314		)
	Other, net	(361		)	(101		)	—			—			(462		)
	Net cash flows from operating activities	41,977			(25,683		)	(1,664		)	20,640			35,270
	CASH FLOWS FROM INVESTING
	ACTIVITIES
	Changes in short-term investments, net	11,000			—			—			—			11,000
	Additions to plant and equipment	(12,017		)	(4,168		)	(54		)	—			(16,239		)
	Proceeds from the sale of assets	4			456			—			—			460
	Net cash flows from investing activities	(1,013		)	(3,712		)	(54		)	—			(4,779		)
	CASH FLOWS FROM FINANCING
	ACTIVITIES
	Purchase of treasury stock	(29,332		)	—			—			—			(29,332		)
	Investment (to) from parent	(7,846		)	29,395			(909		)	(20,640		)	—
	Payment of tax withholdings on equity-	(792		)	—			—			—			(792		)
	based payment arrangements
	Net cash flows from financing activities	(37,970		)	29,395			(909		)	(20,640		)	(30,124		)
	Increase (decrease) in cash	2,994			—			(2,627		)	—			367
	Cash at beginning of period	18,273			—			5,402			—			23,675
	Cash at end of period	$	21,267		$	—		$	2,775		$	—		$	24,042
	Clearwater Paper Corporation
	Consolidating Statement of Cash Flows
	Three Months Ended March 31, 2013
	(In thousands)	Issuer			Guarantor Subsidiaries			Non-Guarantor			Eliminations			Total
								Subsidiary
	CASH FLOWS FROM OPERATING
	ACTIVITIES
	Net (loss) earnings	$	(37	)	$	(328	)	$	134		$	(651	)	$	(882	)
	Adjustments to reconcile net (loss) earnings to net
	cash flows from operating activities:
	Depreciation and amortization	13,784			7,814			553			—			22,151
	Equity-based compensation expense	4,785			—			—			—			4,785
	Deferred tax benefit	(1,565		)	(11,700		)	(707		)	1,358			(12,614		)
	Employee benefit plans	2,693			—			—			—			2,693
	Deferred issuance costs and discounts on	3,544			—			—			—			3,544
	long-term debt
	Changes in working capital, net	(6,301		)	(2,629		)	(938		)	—			(9,868		)
	Changes in taxes receivable, net	7,181			2,291			(203		)	278			9,547
	Changes in non-current accrued taxes, net	(3,183		)	5			1			—			(3,177		)
	Funding of qualified pension plans	(3,026		)	—			—			—			(3,026		)
	Other, net	420			(59		)	—			—			361
	Net cash flows from operating activities	18,295			(4,606		)	(1,160		)	985			13,514
	CASH FLOWS FROM INVESTING
ACTIVITIES
Changes in short-term investments, net	(65,000		)	—			—			—			(65,000		)
Additions to plant and equipment	(16,575		)	(2,557		)	(339		)	—			(19,471		)
Net cash flows from investing activities	(81,575		)	(2,557		)	(339		)	—			(84,471		)
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	(50,166		)	—			—			—			(50,166		)
Investment (to) from parent	(8,500		)	7,160			2,325			(985		)	—
Payments for long-term debt issuance costs	(4,723		)	—			—			—			(4,723		)
Payment of tax withholdings on equity-	(2,195		)	—			—			—			(2,195		)
based payment arrangements
Net cash flows from financing activities	59,416			7,160			2,325			(985		)	67,916
(Decrease) increase in cash	(3,864		)	(3		)	826			—			(3,041		)
Cash at beginning of period	11,105			5			1,469			—			12,579
Cash at end of period	$	7,241		$	2		$	2,295		$	—		$	9,538

Nature_of_Operations_and_Basis2

Nature of Operations and Basis of Presentation - Additional Information (Detail) (USD $)	3 Months Ended		0 Months Ended		3 Months Ended	12 Months Ended	0 Months Ended	6 Months Ended	1 Months Ended	3 Months Ended	13 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Feb. 07, 2014	Jan. 21, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 02, 2013	Sep. 16, 2013	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014
	location		Common Stock	Common Stock	Common Stock	Common Stock	Common Stock	Common Stock	Long Island, New York Facility	Thomaston, Georgia Facility	Thomaston, Georgia Facility
					Open Market Share Repurchase	Open Market Share Repurchase	Accelerated Share Buyback Agreement	Accelerated Share Buyback Agreement
Nature of Operations	'	'	'	'	'	'	'	'	'	'	'
Number of manufacturing locations	13	'	'	'	'	'	'	'	'	'	'
Other Nonrecurring Expense, Planned Permaent Facility Closure	'	'	'	'	'	'	'	'	$8.40	$0.80	$6.70
Allowance for doubtful accounts	2	1.9	'	'	'	'	'	'	'	'	'
Accumulated depreciation	1,492.30	1,476.40	'	'	'	'	'	'	'	'	'
Common stock repurchase authorized	'	'	100	100	'	50	50	'	'	'	'
Number of shares repurchased (in shares)	'	'	'	'	458,584	1,030,657	'	1,039,513	'	'	'
Treasury Stock Acquired, Average Cost Per Share	'	'	'	'	$63.96	$48.51	'	$48.10	'	'	'
Remaining authorized share amount	70.7	'	'	'	'	'	'	'	'	'	'
Percentage Of Expected Natural Gas Requirement Covered Under Contract	10.00%	'	'	'	'	'	'	'	'	'	'
Impairment of Long-Lived Assets Held-for-use	$3	'	'	'	'	'	'	'	'	'	'

Inventories_Detail

Inventories (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Pulp, paperboard and tissue products	$184,330	$182,715
Materials and supplies	72,481	69,836
Logs, pulpwood, chips and sawdust	12,438	15,237
Inventories	$269,249	$267,788

Intangible_Assets_Detail

Intangible Assets (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]	'	'
Impairment of Intangible Assets, Finite-lived	$1,300,000	'
Historical Cost	58,539,000	60,931,000
Accumulated Amortization	-20,736,000	-20,153,000
Net Balance	37,803,000	40,778,000
Customer relationships	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Useful Life	'9 years 0 months	'9 years 0 months
Historical Cost	53,957,000	53,957,000
Accumulated Amortization	-18,731,000	-17,234,000
Net Balance	35,226,000	36,723,000
Tradenames and trademarks	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Useful Life	'10 years 0 months	'10 years 0 months
Historical Cost	3,393,000	5,300,000
Accumulated Amortization	-1,103,000	-1,590,000
Net Balance	2,290,000	3,710,000
Non-compete agreements	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Historical Cost	1,189,000	1,674,000
Accumulated Amortization	-902,000	-1,329,000
Net Balance	$287,000	$345,000
Maximum | Non-compete agreements	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Useful Life	'5 years	'5 years
Minimum | Non-compete agreements	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Useful Life	'2 years 6 months	'2 years 6 months

Taxes_Additional_Information_D

Taxes - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]	'	'
Statutory federal income tax rate	35.00%	35.00%
State taxes, net of credits	2.00%	0.50%
Change in valuation allowances	4.20%	3.00%
Federal manufacturing deduction	-2.00%	-1.10%
Increase in uncertain tax position	0.00%	-3.10%
Interest accrued on uncertain tax positions	0.20%	-3.00%
Conversion From Alternative Fuel Mixture Tax Credit to Cellulosic Biofuel Producer Tax Credit	0.00%	62.90%
Other Federal Credits	-4.40%	-1.50%
State rate adjustment	-0.20%	0.80%
Return to provision adjustments	0.90%	0.20%
Other	0.70%	0.60%
Effective tax rate	36.40%	94.30%
Estimated Annual Effective Tax Rate	36.00%	37.00%
Deferred Tax Assets, Other	$0.40	'

Accounts_Payable_and_Accrued_L2

Accounts Payable and Accrued Liabilities (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts Payable and Accrued Liabilities [Abstract]	'	'
Trade accounts payable	$114,965	$108,192
Accrued wages, salaries and employee benefits	43,294	38,563
Accrued interest	13,252	9,691
Accrued taxes other than income taxes payable	8,387	6,322
Accrued discounts and allowances	5,427	6,410
Accrued utilities	7,938	8,309
Other	12,175	13,161
Accounts payable and accrued liabilities	$205,438	$190,648

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	0 Months Ended		1 Months Ended			0 Months Ended
	Oct. 22, 2010	Jan. 21, 2013	Nov. 26, 2008	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014
	Senior Notes Due 2018	Senior Notes Due 2023	Revolving Credit Facility	Revolving Credit Facility	Revolving Credit Facility	Revolving Credit Facility	Revolving Credit Facility	Revolving Credit Facility	Revolving Credit Facility	Revolving Credit Facility	Revolving Credit Facility
					Minimum	London Interbank Offered Rate (LIBOR)	London Interbank Offered Rate (LIBOR)	London Interbank Offered Rate (LIBOR)	Base Rate	Base Rate	Federal Fund Rate
							Minimum	Maximum	Minimum	Maximum	Maximum
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Debt Instrument, Face Amount	$375,000,000	$275,000,000	'	'	'	'	'	'	'	'	'
Debt instrument, maturity date	1-Nov-18	1-Feb-23	'	'	'	'	'	'	'	'	'
Debt instrument, interest rate	7.13%	4.50%	'	'	'	'	'	'	'	'	'
Credit facility, maximum borrowing capacity	'	'	125,000,000	125,000,000	'	'	'	'	'	'	'
Earliest extended term of revolving loan	'	'	30-Sep-16	'	'	'	'	'	'	'	'
Amount available as percentage of eligible accounts receivable	'	'	'	85.00%	'	'	'	'	'	'	'
Amount available as percentage of eligible inventories	'	'	'	65.00%	'	'	'	'	'	'	'
Outstanding stand by letters of credit	'	'	'	6,900,000	'	'	'	'	'	'	'
Interest rate spread	'	'	'	'	'	1.75%	1.75%	2.25%	1.25%	1.75%	0.50%
Credit facility available to draw	'	'	'	$118,100,000	'	'	'	'	'	'	'
Percentage of availability triggers covenant requirement under credit facility	'	'	'	12.50%	'	'	'	'	'	'	'
Debt covenant, actual fixed charge ratio	'	'	'	3.3	1	'	'	'	'	'	'

Other_LongTerm_Obligations_Det

Other Long-Term Obligations (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Other Liabilities, Noncurrent [Abstract]	'	'
Long-term lease obligations, net of current portion	$24,734	$24,815
Deferred proceeds	10,681	11,205
Deferred compensation	12,889	14,149
Other	2,521	2,773
Other long-term obligations	$50,825	$52,942

Reclassification_out_of_Accumu2

Reclassification out of Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]	'		'
Period opening balance	($58,093,000)		($115,693,000)
Net current period other comprehensive income ending balance	1,484,000	[1]	2,461,000	[1]
Period closing balance	-56,609,000		-113,232,000
Amortization of actuarial loss included in net periodic cost, before tax	-2,500,000		-4,300,000
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax	100,000		300,000
Other comprehensive income (loss), tax	900,000		1,600,000
Foreign Currency Translation Adjustments	'		'
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]	'		'
Period opening balance	-874,000	[2]	-874,000	[2]
Net current period other comprehensive income ending balance	0	[1],[2]	0	[1],[2]
Period closing balance	-874,000	[2]	-874,000	[2]
Defined Benefit Pension Plan Adjustments	'		'
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]	'		'
Period opening balance	-57,219,000		-114,819,000
Net current period other comprehensive income ending balance	1,484,000	[1]	2,461,000	[1]
Period closing balance	($55,735,000)		($112,358,000)
[1]	For the three months ended MarchB 31, 2014 and 2013, net periodic costs associated with our pension and other postretirement employee benefit, or OPEB, plans included in other comprehensive income and reclassified from accumulated other comprehensive loss includes $2.5 million and $4.3 million, respectively, of actuarial loss amortization and $0.1 million and $0.3 million, respectively, related to prior service credit, net of tax of $0.9 million and $1.6 million, respectively. These accumulated other comprehensive loss components are included in the computation of net periodic pension and OPEB costs in Note 10, bPension and Other Postretirement Employee Benefit Plans.b
[2]	This balance consists of unrealized foreign currency translation adjustments related to the operations of our Canadian subsidiary before its functional currency was changed from Canadian dollars to U.S. dollars in 2012.

Pension_and_Other_Postretireme2

Pension and Other Postretirement Employee Benefit Plans - Additional Information (Detail 1) (USD $)	3 Months Ended						1 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Apr. 30, 2014	Dec. 31, 2014
	Company-Sponsored Pension Plans	Non Qualified Pension Plans	Cost of Sales	Cost of Sales	Selling, General and Administrative Expenses	Selling, General and Administrative Expenses	Subsequent Event	Subsequent Event
							Company-Sponsored Pension Plans	Company-Sponsored Pension Plans
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'	'	'	'	'
Employer contribution	$4.30	$0.20	'	'	'	'	$4.60	'
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	'	0.5	'	'	'	'	'	10
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax	'	'	$2.30	$4.10	$0.60	$0.80	'	'

Pension_and_Other_Postretireme3

Pension and Other Postretirement Employee Benefit Plans Components of Net Periodic Cost of Pension and Other Postretirement Employee Benefit Plans (Detail 2) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Pension Benefit Plans	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Service cost	$355	$485
Interest cost	3,688	3,359
Expected return on plan assets	-5,015	-4,568
Amortization of prior service cost (credit)	52	111
Amortization of actuarial loss	2,494	3,874
Net periodic cost	1,574	3,261
Other Postretirement Employee Benefit Plans	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Service cost	117	206
Interest cost	1,302	1,318
Expected return on plan assets	0	0
Amortization of prior service cost (credit)	-126	-381
Amortization of actuarial loss	0	456
Net periodic cost	$1,293	$1,599

Earnings_per_Common_Share_Reco

Earnings per Common Share Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted Net Earnings Per Share (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Earnings Per Share [Abstract]	'		'
Basic average common shares outstanding	20,984,217	[1]	22,884,065	[1]
Incremental shares due to:	'		'
Restricted stock units	67,358		0
Performance shares	167,329		0
Stock Options	0		0
Diluted average common shares outstanding	21,218,904		22,884,065
Basic net earnings per common share (in dollars per share)	$0.30		($0.04)
Diluted net earnings per common share (in dollars per share)	$0.29		($0.04)
Anti-dilutive shares excluded from calculation	242,244		514,318
[1]	Basic average common shares outstanding include restricted stock awards that are fully vested, but are deferred for future issuance.

EquityBased_Compensation_Addit

Equity-Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Cash paid for minimum tax withholdings	$792,000	$2,195,000	'
Options, Grants in Period, Gross	160,671	'	'
Options, Grants in Period, Weighted Average Exercise Price	$66.95	'	'
Options, Grants in Period, Weighted Average Grant Date Fair Value	$22.99	'	'
Share based compensation expense	1,662,000	1,313,000	'
Restricted stock units	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Equity Instruments Other than Options, Vested in Previous Period and Distributed in Current Period	38,319	'	'
Shares issued (in shares)	23,234	'	'
Cash paid for minimum tax withholdings	800,000	'	'
Share based compensation expense	445,000	375,000	'
Performance shares	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share based compensation expense	1,081,000	938,000	'
Employee Stock Option	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Options, Grants in Period, Weighted Average Grant Date Fair Value	$22.99	'	'
Share based compensation expense	136,000	0	'
Director	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share based compensation expense	2,800,000	3,500,000	'
Deferred Compensation Share-based Arrangements, Liability, Classified, Noncurrent	11,900,000	'	13,200,000
Deferred Compensation Share-based Arrangements, Liability, Current	$4,100,000	'	'

EquityBased_Compensation_Emplo

Equity-Based Compensation Employee Equity Based Compensation Expense (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Share based compensation expense	$1,662	$1,313
Restricted stock units	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Share based compensation expense	445	375
Performance shares	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Share based compensation expense	1,081	938
Employee Stock Option	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Share based compensation expense	$136	$0

EquityBased_Compensation_Summa

Equity-Based Compensation Summary of Number of Share-Based Awards Granted (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Options, Grants in Period, Gross	160,671
Options, Grants in Period, Weighted Average Grant Date Fair Value	$22.99
Performance shares	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of share-based awards granted	53,557
Grant-date fair value of awards per share	$105.08
Restricted stock units	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of share-based awards granted	28,016
Grant-date fair value of awards per share	$66.98

Fair_Value_Measurements_Estima

Fair Value Measurements Estimated Fair Values of Financial Instruments (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash, restricted cash, and short-term investments (Level 1)	$84,573	$95,206
Long-term debt (Level 1)	650,000	650,000
Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash, restricted cash, and short-term investments (Level 1)	84,573	95,206
Long-term debt (Level 1)	$661,563	$651,313

Segment_Information_Reportable

Segment Information Reportable Segments Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]	'	'
Net sales	$484,920	$460,824
Income from operations	20,518	12,483
Depreciation and amortization	22,231	22,151
Consumer Products	'	'
Segment Reporting Information [Line Items]	'	'
Net sales	286,508	284,902
Income from operations	-523	10,124
Depreciation and amortization	15,490	16,092
Pulp and Paperboard	'	'
Segment Reporting Information [Line Items]	'	'
Net sales	198,412	175,922
Income from operations	36,776	17,553
Depreciation and amortization	6,270	5,659
Operating Segments	'	'
Segment Reporting Information [Line Items]	'	'
Income from operations	36,253	27,677
Corporate	'	'
Segment Reporting Information [Line Items]	'	'
Income from operations	-15,735	-15,194
Depreciation and amortization	471	400
Externally sold pulp [Member] | Consumer Products	'	'
Segment Reporting Information [Line Items]	'	'
Net sales	400	'
Externally sold pulp [Member] | Pulp and Paperboard	'	'
Segment Reporting Information [Line Items]	'	'
Net sales	'	$1,200

Supplemental_Guarantor_Financi2

Supplemental Guarantor Financial Information Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Condensed Financial Statements, Captions [Line Items]	'		'
Net sales	$484,920		$460,824
Cost and expenses:	'		'
Cost of sales	-426,629		-414,209
Selling, general and administrative expenses	-33,514		-34,132
Asset Impairment Charges	-4,259		0
Total operating costs and expenses	-464,402		-448,341
Income (loss) from operations	20,518		12,483
Interest expense, net	-10,734		-10,982
Gains (Losses) on Extinguishment of Debt	0		-17,058
Earnings (loss) before income taxes	9,784		-15,557
Income tax (provision) benefit	-3,558		14,675
Net earnings (loss)	6,226		-882
Other comprehensive income, net of tax	1,484	[1]	2,461	[1]
Comprehensive income	7,710		1,579
Issuer	'		'
Condensed Financial Statements, Captions [Line Items]	'		'
Net sales	368,331		344,248
Cost and expenses:	'		'
Cost of sales	-302,102		-302,351
Selling, general and administrative expenses	-27,659		-27,908
Asset Impairment Charges	0		'
Total operating costs and expenses	-329,761		-330,259
Income (loss) from operations	38,570		13,989
Interest expense, net	-10,723		-10,982
Gains (Losses) on Extinguishment of Debt	'		-17,058
Earnings (loss) before income taxes	27,847		-14,051
Income tax (provision) benefit	-13,477		14,342
Equity in income (loss) of subsidiary	-8,485		-328
Net earnings (loss)	5,885		-37
Other comprehensive income, net of tax	1,484		2,461
Comprehensive income	7,369		2,424
Guarantor Subsidiaries	'		'
Condensed Financial Statements, Captions [Line Items]	'		'
Net sales	117,377		114,716
Cost and expenses:	'		'
Cost of sales	-124,793		-110,657
Selling, general and administrative expenses	-5,517		-5,734
Asset Impairment Charges	-4,259		'
Total operating costs and expenses	-134,569		-116,391
Income (loss) from operations	-17,192		-1,675
Interest expense, net	-11		0
Earnings (loss) before income taxes	-17,203		-1,675
Income tax (provision) benefit	9,372		1,213
Equity in income (loss) of subsidiary	-654		134
Net earnings (loss)	-8,485		-328
Comprehensive income	-8,485		-328
Non-Guarantor Subsidiaries	'		'
Condensed Financial Statements, Captions [Line Items]	'		'
Net sales	6,513		6,855
Cost and expenses:	'		'
Cost of sales	-7,035		-6,196
Selling, general and administrative expenses	-338		-490
Asset Impairment Charges	0		'
Total operating costs and expenses	-7,373		-6,686
Income (loss) from operations	-860		169
Interest expense, net	'		0
Earnings (loss) before income taxes	-860		169
Income tax (provision) benefit	206		-35
Net earnings (loss)	-654		134
Comprehensive income	-654		134
Eliminations	'		'
Condensed Financial Statements, Captions [Line Items]	'		'
Net sales	-7,301		-4,995
Cost and expenses:	'		'
Cost of sales	7,301		4,995
Asset Impairment Charges	0		'
Total operating costs and expenses	7,301		4,995
Income tax (provision) benefit	341		-845
Equity in income (loss) of subsidiary	9,139		194
Net earnings (loss)	9,480		-651
Comprehensive income	$9,480		($651)
[1]	For the three months ended MarchB 31, 2014 and 2013, net periodic costs associated with our pension and other postretirement employee benefit, or OPEB, plans included in other comprehensive income and reclassified from accumulated other comprehensive loss includes $2.5 million and $4.3 million, respectively, of actuarial loss amortization and $0.1 million and $0.3 million, respectively, related to prior service credit, net of tax of $0.9 million and $1.6 million, respectively. These accumulated other comprehensive loss components are included in the computation of net periodic pension and OPEB costs in Note 10, bPension and Other Postretirement Employee Benefit Plans.b

Supplemental_Guarantor_Financi3

Supplemental Guarantor Financial Information Condensed Consolidating Balance Sheet (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'	'	'	'
Cash	$24,042	$23,675	$9,538	$12,579
Restricted cash	1,500	1,500	'	'
Short-term investments	59,000	70,000	'	'
Receivables, net	169,052	158,874	'	'
Taxes receivable	4,980	10,503	'	'
Inventories	269,249	267,788	'	'
Deferred tax assets	37,257	37,538	'	'
Prepaid expenses	10,501	5,523	'	'
Total current assets	575,581	575,401	'	'
Property, plant and equipment, net	875,955	884,698	'	'
Goodwill	229,533	229,533	'	'
Intangible assets, net	37,803	40,778	'	'
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent	7,732	4,488	'	'
Other assets, net	9,585	9,927	'	'
TOTAL ASSETS	1,736,189	1,744,825	'	'
Current liabilities:	'	'	'	'
Accounts payable and accrued liabilities	205,438	190,648	'	'
Current liability for pensions and other postretirement employee benefits	8,778	8,778	'	'
Total current liabilities	214,216	199,426	'	'
Long-term debt	650,000	650,000	'	'
Liability for pensions and other postretirement employee benefits	107,402	109,807	'	'
Other long-term obligations	50,825	52,942	'	'
Accrued taxes	2,677	2,658	'	'
Deferred tax liabilities (assets)	126,726	124,898	'	'
Accumulated other comprehensive loss, net of tax	-56,609	-58,093	-113,232	-115,693
Stockholders' equity excluding accumulated other comprehensive loss	640,952	663,187	'	'
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,736,189	1,744,825	'	'
Issuer	'	'	'	'
Current assets:	'	'	'	'
Cash	21,267	18,273	7,241	11,105
Restricted cash	1,500	1,500	'	'
Short-term investments	59,000	70,000	'	'
Receivables, net	125,334	119,278	'	'
Taxes receivable	5,674	3,709	'	'
Inventories	204,803	198,476	'	'
Deferred tax assets	28,623	42,289	'	'
Prepaid expenses	9,735	4,704	'	'
Total current assets	455,936	458,229	'	'
Property, plant and equipment, net	633,696	636,662	'	'
Goodwill	229,533	229,533	'	'
Intangible assets, net	6,008	0	'	'
Intercompany receivable (payable)	102,891	91,865	'	'
Investment in subsidiary	187,624	196,763	'	'
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent	7,732	4,488	'	'
Other assets, net	8,438	8,772	'	'
TOTAL ASSETS	1,631,858	1,626,312	'	'
Current liabilities:	'	'	'	'
Accounts payable and accrued liabilities	159,880	140,125	'	'
Current liability for pensions and other postretirement employee benefits	8,778	8,778	'	'
Total current liabilities	168,658	148,903	'	'
Long-term debt	650,000	650,000	'	'
Liability for pensions and other postretirement employee benefits	107,402	109,807	'	'
Other long-term obligations	49,728	51,740	'	'
Accrued taxes	1,440	1,430	'	'
Deferred tax liabilities (assets)	70,287	59,338	'	'
Accumulated other comprehensive loss, net of tax	-56,609	-58,093	'	'
Stockholders' equity excluding accumulated other comprehensive loss	640,952	663,187	'	'
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,631,858	1,626,312	'	'
Guarantor Subsidiaries	'	'	'	'
Current assets:	'	'	'	'
Cash	0	0	2	5
Receivables, net	41,009	38,063	'	'
Taxes receivable	-1,253	-15,882	'	'
Inventories	58,047	65,017	'	'
Deferred tax assets	8,441	6,094	'	'
Prepaid expenses	634	695	'	'
Total current assets	106,878	93,987	'	'
Property, plant and equipment, net	225,796	231,225	'	'
Intangible assets, net	30,689	39,619	'	'
Intercompany receivable (payable)	-87,026	-63,932	'	'
Investment in subsidiary	4,921	5,575	'	'
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent	0	0	'	'
Other assets, net	1,147	1,155	'	'
TOTAL ASSETS	282,405	307,629	'	'
Current liabilities:	'	'	'	'
Accounts payable and accrued liabilities	38,893	45,736	'	'
Total current liabilities	38,893	45,736	'	'
Other long-term obligations	1,097	1,202	'	'
Accrued taxes	919	911	'	'
Deferred tax liabilities (assets)	53,872	63,017	'	'
Stockholders' equity excluding accumulated other comprehensive loss	187,624	196,763	'	'
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	282,405	307,629	'	'
Non-Guarantor Subsidiaries	'	'	'	'
Current assets:	'	'	'	'
Cash	2,775	5,402	2,295	1,469
Receivables, net	3,106	2,700	'	'
Taxes receivable	403	324	'	'
Inventories	6,399	4,295	'	'
Deferred tax assets	7	5	'	'
Prepaid expenses	132	124	'	'
Total current assets	12,822	12,850	'	'
Property, plant and equipment, net	16,463	16,811	'	'
Intangible assets, net	1,106	1,159	'	'
Intercompany receivable (payable)	-15,523	-16,431	'	'
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent	0	0	'	'
TOTAL ASSETS	14,868	14,389	'	'
Current liabilities:	'	'	'	'
Accounts payable and accrued liabilities	7,062	5,954	'	'
Total current liabilities	7,062	5,954	'	'
Accrued taxes	318	317	'	'
Deferred tax liabilities (assets)	2,567	2,543	'	'
Stockholders' equity excluding accumulated other comprehensive loss	4,921	5,575	'	'
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	14,868	14,389	'	'
Eliminations	'	'	'	'
Current assets:	'	'	'	'
Cash	0	0	0	0
Receivables, net	-397	-1,167	'	'
Taxes receivable	156	22,352	'	'
Deferred tax assets	186	-10,850	'	'
Total current assets	-55	10,335	'	'
Intercompany receivable (payable)	-342	-11,502	'	'
Investment in subsidiary	-192,545	-202,338	'	'
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent	0	0	'	'
TOTAL ASSETS	-192,942	-203,505	'	'
Current liabilities:	'	'	'	'
Accounts payable and accrued liabilities	-397	-1,167	'	'
Total current liabilities	-397	-1,167	'	'
Deferred tax liabilities (assets)	0	0	'	'
Stockholders' equity excluding accumulated other comprehensive loss	-192,545	-202,338	'	'
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	($192,942)	($203,505)	'	'

Supplemental_Guarantor_Financi4

Supplemental Guarantor Financial Information Condensed Consolidating Statement of Cash Flows (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net earnings (loss)	$6,226	($882)
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	22,231	22,151
Equity-based compensation expense	4,479	4,785
Asset Impairment Charges	4,259	0
Deferred tax expense (benefit)	1,173	-12,614
Employee benefit plans	888	2,693
Amortization of Financing Costs and Discounts	475	3,544
Gain (Loss) on Disposition of Assets	429	0
Changes in working capital, net	-5,656	-9,868
Change in taxes receivable, net	5,523	9,547
Change in non-current accrued taxes	19	-3,177
Funding of qualified pension plans	-4,314	-3,026
Other Operating Activities, Cash Flow Statement	-462	361
Net cash provided by operating activities	35,270	13,514
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Change in short-term investments, net	11,000	-65,000
Additions to plant and equipment	-16,239	-19,471
Proceeds from Sale of Productive Assets	460	0
Net cash used for investing activities	-4,779	-84,471
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Proceeds from Issuance of Long-term Debt	0	275,000
Repayment of Cellu Tissue debt	0	-150,000
Payments for Repurchase of Common Stock	-29,332	-50,166
Investment (to) from Parent	0	0
Payments of Debt Issuance Costs	0	-4,723
Payment of tax withholdings on equity-based payment arrangements	-792	-2,195
Net cash (used for) provided by financing activities	-30,124	67,916
Increase in cash	367	-3,041
Cash at beginning of period	23,675	12,579
Cash at end of period	24,042	9,538
Issuer	'	'
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net earnings (loss)	5,885	-37
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	14,121	13,784
Equity-based compensation expense	4,479	4,785
Asset Impairment Charges	0	'
Deferred tax expense (benefit)	23,679	-1,565
Employee benefit plans	888	2,693
Amortization of Financing Costs and Discounts	475	3,544
Gain (Loss) on Disposition of Assets	139	'
Changes in working capital, net	-1,059	-6,301
Change in taxes receivable, net	-1,965	7,181
Change in non-current accrued taxes	10	-3,183
Funding of qualified pension plans	-4,314	-3,026
Other Operating Activities, Cash Flow Statement	-361	420
Net cash provided by operating activities	41,977	18,295
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Change in short-term investments, net	11,000	-65,000
Additions to plant and equipment	-12,017	-16,575
Proceeds from Sale of Productive Assets	4	'
Net cash used for investing activities	-1,013	-81,575
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Proceeds from Issuance of Long-term Debt	'	275,000
Repayment of Cellu Tissue debt	'	-150,000
Payments for Repurchase of Common Stock	-29,332	-50,166
Investment (to) from Parent	-7,846	-8,500
Payments of Debt Issuance Costs	'	-4,723
Payment of tax withholdings on equity-based payment arrangements	-792	-2,195
Net cash (used for) provided by financing activities	-37,970	59,416
Increase in cash	2,994	-3,864
Cash at beginning of period	18,273	11,105
Cash at end of period	21,267	7,241
Guarantor Subsidiaries	'	'
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net earnings (loss)	-8,485	-328
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	7,529	7,814
Equity-based compensation expense	0	0
Asset Impairment Charges	4,259	'
Deferred tax expense (benefit)	-11,492	-11,700
Employee benefit plans	0	0
Amortization of Financing Costs and Discounts	0	0
Gain (Loss) on Disposition of Assets	290	'
Changes in working capital, net	-3,062	-2,629
Change in taxes receivable, net	-14,629	2,291
Change in non-current accrued taxes	8	5
Funding of qualified pension plans	0	0
Other Operating Activities, Cash Flow Statement	-101	-59
Net cash provided by operating activities	-25,683	-4,606
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Change in short-term investments, net	0	0
Additions to plant and equipment	-4,168	-2,557
Proceeds from Sale of Productive Assets	456	'
Net cash used for investing activities	-3,712	-2,557
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Proceeds from Issuance of Long-term Debt	'	0
Repayment of Cellu Tissue debt	'	0
Payments for Repurchase of Common Stock	0	0
Investment (to) from Parent	29,395	7,160
Payments of Debt Issuance Costs	'	0
Payment of tax withholdings on equity-based payment arrangements	0	0
Net cash (used for) provided by financing activities	29,395	7,160
Increase in cash	0	-3
Cash at beginning of period	0	5
Cash at end of period	0	2
Non-Guarantor Subsidiaries	'	'
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net earnings (loss)	-654	134
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	581	553
Equity-based compensation expense	0	0
Asset Impairment Charges	0	'
Deferred tax expense (benefit)	22	-707
Employee benefit plans	0	0
Amortization of Financing Costs and Discounts	0	0
Gain (Loss) on Disposition of Assets	0	'
Changes in working capital, net	-1,535	-938
Change in taxes receivable, net	-79	-203
Change in non-current accrued taxes	1	1
Funding of qualified pension plans	0	0
Other Operating Activities, Cash Flow Statement	0	0
Net cash provided by operating activities	-1,664	-1,160
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Change in short-term investments, net	0	0
Additions to plant and equipment	-54	-339
Proceeds from Sale of Productive Assets	0	'
Net cash used for investing activities	-54	-339
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Proceeds from Issuance of Long-term Debt	'	0
Repayment of Cellu Tissue debt	'	0
Payments for Repurchase of Common Stock	0	0
Investment (to) from Parent	-909	2,325
Payments of Debt Issuance Costs	'	0
Payment of tax withholdings on equity-based payment arrangements	0	0
Net cash (used for) provided by financing activities	-909	2,325
Increase in cash	-2,627	826
Cash at beginning of period	5,402	1,469
Cash at end of period	2,775	2,295
Eliminations	'	'
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net earnings (loss)	9,480	-651
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	0	0
Equity-based compensation expense	0	0
Asset Impairment Charges	0	'
Deferred tax expense (benefit)	-11,036	1,358
Employee benefit plans	0	0
Amortization of Financing Costs and Discounts	0	0
Gain (Loss) on Disposition of Assets	0	'
Changes in working capital, net	0	0
Change in taxes receivable, net	22,196	278
Change in non-current accrued taxes	0	0
Funding of qualified pension plans	0	0
Other Operating Activities, Cash Flow Statement	0	0
Net cash provided by operating activities	20,640	985
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Change in short-term investments, net	0	0
Additions to plant and equipment	0	0
Proceeds from Sale of Productive Assets	0	'
Net cash used for investing activities	0	0
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Proceeds from Issuance of Long-term Debt	'	0
Repayment of Cellu Tissue debt	'	0
Payments for Repurchase of Common Stock	0	0
Investment (to) from Parent	-20,640	-985
Payments of Debt Issuance Costs	'	0
Payment of tax withholdings on equity-based payment arrangements	0	0
Net cash (used for) provided by financing activities	-20,640	-985
Increase in cash	0	0
Cash at beginning of period	0	0
Cash at end of period	$0	$0