Clearwater Paper (CLW) 10-Q 30 Oct 23 2023 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2023	Oct. 27, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Amendment Flag	false
Document Period End Date	Sep. 30, 2023
Entity File Number	001-34146
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Registrant Name	CLEARWATER PAPER CORPORATION
Entity Central Index Key	0001441236
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-3594554
Entity Address, Address Line One	601 West Riverside,
Entity Address, Address Line Two	Suite 1100
Entity Address, City or Town	Spokane,
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	99201
Current Fiscal Year End Date	--12-31
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	CLW
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Small Business	false
Document Transition Report	false
Entity Common Stock, Shares Outstanding		16,563,343
Local Phone Number	344-5900
City Area Code	509

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 110.2	$ 53.7
Receivables, Net	173	188.8
Inventories	333.3	324
Other current assets	10.5	19.9
Total current assets	627	586.3
Property, Plant and Equipment, Net	993.8	1,017.1
Other assets, net	116.2	100.1
TOTAL ASSETS	1,737	1,703.5
Current liabilities:
Current portion of long-term debt	0.9	0.9
Accounts Payable and Accrued Liabilities	260	311.1
Total current liabilities	260.9	312
Long-term Debt, Excluding Current Maturities	564.8	564.9
Liability for pension and other postretirement employee benefits	56.9	58.2
Deferred tax liabilities and other long-term obligations	205.9	196.4
Total liabilities	1,088.4	1,131.5
Stockholders' equity:
Preferred Stock, Value, Issued	0	0
Common Stock, Value, Issued	0	0
Additional paid-in capital	15.1	28.5
Retained earnings	666.9	576.8
Accumulated other comprehensive loss, net of tax	(33.5)	(33.3)
Total stockholders' equity	648.5	572.1
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,737	$ 1,703.5

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred Stock, Shares Authorized	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	16,563,343	16,761,869

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net Sales	$ 519.9	$ 538.8	$ 1,569.9	$ 1,553.3
Costs and expenses:
Cost of sales	427.4	454.8	1,314.6	1,332
Selling, General and Administrative Expense	36.4	32.9	111.5	99.6
Other Operating Income (Expense), Net	(1.8)	(2.2)	(2.4)	(8.5)
Total operating costs and expenses	465.5	489.9	1,428.5	1,440
Income from operations	54.4	48.9	141.5	113.3
Interest Expense, Net	(6.9)	(8)	(22)	(27.3)
Gain (Loss) on Extinguishment of Debt	0	0	0	(0.5)
Other Nonoperating Income (Expense)	0.1	(1.4)	0.3	(4.3)
Total non-operating expense	(6.8)	(9.4)	(21.7)	(32.1)
Income before income taxes	47.6	39.5	119.8	81.2
Income tax provision	11	18.9	29.6	29.3
Net income	$ 36.6	$ 20.6	$ 90.1	$ 51.9
Net income per common share:
Basic (in dollars per share)	$ 2.20	$ 1.23	$ 5.37	$ 3.09
Diluted (in dollars per share)	$ 2.17	$ 1.21	$ 5.29	$ 3.04
Weighted Average Number of Shares Outstanding, Basic	16,682	16,754	16,800	16,777
Weighted Average Number of Shares Outstanding, Diluted	16,895	17,093	17,051	17,085

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 36.6	$ 20.6	$ 90.1	$ 51.9
Defined benefit pension and other postretirement employee benefits:
Amortization of actuarial (gain) loss included in net periodic cost, net of tax of $0.0, $0.4, $0.1 and $1.2	(0.1)	1.1	(0.2)	3.5
Other comprehensive income (loss), net of tax	(0.1)	1.1	(0.2)	3.5
Comprehensive income	$ 36.6	$ 21.8	$ 89.9	$ 55.4

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax	$ 0	$ 0.4	$ (0.1)	$ 1.2

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2023		Sep. 30, 2022		Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 36.6		$ 20.6		$ 90.1	$ 51.9
Depreciation and amortization	24.4		26.2		73.8	77.4
Equity-based compensation expense	3.5		4		7	9.6
Deferred taxes	(4.4)		(1.6)		(7.3)	(5.8)
Defined benefit pension and other postretirement employee benefits	(0.4)		0.7		(1.5)	2.2
Amortization of deferred debt costs and debt retirement	0.3		0.5		0.9	1.8
Loss on sale or impairment associated with assets	0.3		1.2		1.4	5.8
Accounts receivable	23.6		4.2		7.9	(17.6)
Inventories	6.9		(39.2)		(10.1)	(49.1)
Other current assets	2.9		1.4		8.6	5.6
Accounts payable and accrued liabilities	(6)		(4.4)		(46.9)	50
Other Operating Activities, Cash Flow Statement	0.4		(0.3)		1	1.1
Net cash flows provided by operating activities	88.2		13.3		125	132.8
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to property, plant and equipment, net 1	(14.2)	[1]	(6.7)	[1]	(48.5)	(19.9)
Net cash flows used in investing activities	(14.2)		(6.7)		(48.5)	(19.9)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from Short-Term Debt	0		0		12	0
Repayments of Short-term Debt	0		0		(12)	0
Repayments of long-term debt	(0.2)		(25.3)		(0.7)	(80.8)
Payment, Tax Withholding, Share-based Payment Arrangement	(0.1)		0		(4.7)	(2.5)
Payments for Repurchase of Common Stock	(5)		(1)		(15.1)	(4.9)
Proceeds from (Payments for) Other Financing Activities	(0.1)		0.7		(0.2)	0.7
Net cash flows used in financing activities	(5.5)		(25.7)		(20.7)	(87.6)
Increase (decrease) in cash, cash equivalents and restricted cash	68.5		(19.1)		55.8	25.3
Cash, cash equivalents and restricted cash at beginning of period	41.7		70.6		54.4	26.2
Cash, cash equivalents and restricted cash at end of period	110.2		51.5		110.2	51.5
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for interest, net of amounts capitalized	14.6		15.4		29.9	32.3
Cash paid for income taxes	12.8		12.9		28	25.4
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH
Cash and cash equivalents	110.2		50.8		110.2	50.8
Restricted cash included in other current assets, net	0		0.7		0	0.7
Total cash, cash equivalents and restricted cash	$ 110.2		$ 51.5		$ 110.2	$ 51.5
[1]Capital expenditures of $16.5 million and $7.3 million that have not been paid as of September 30, 2023 and 2022 were excluded from the Statements of Cash Flows.

Consolidated Statements of Stoc

Consolidated Statements of Stockholder's Equity Consolidated Statements of Stockholder's Equity - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2021		16,692
Beginning balance at Dec. 31, 2021	$ 511.7	$ 0	$ 23.6	$ 530.7	$ (42.6)
Net income	16.6			16.6
Stock-based compensation expense	2		2
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		119
Issuance of shares under stock plans, net	(1.5)		(1.5)
Pension and other postretirement employee benefit plans, net of tax	1.1				1.1
Ending balance (in shares) at Mar. 31, 2022		16,811
Ending balance at Mar. 31, 2022	530	$ 0	24.1	547.3	(41.4)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent	0.4
Beginning balance (in shares) at Dec. 31, 2021		16,692
Beginning balance at Dec. 31, 2021	511.7	$ 0	23.6	530.7	(42.6)
Net income	51.9
Ending balance (in shares) at Sep. 30, 2022		16,762
Ending balance at Sep. 30, 2022	569.2	$ 0	25.7	582.7	(39.1)
Beginning balance (in shares) at Mar. 31, 2022		16,811
Beginning balance at Mar. 31, 2022	530	$ 0	24.1	547.3	(41.4)
Net income	14.7			14.7
Stock-based compensation expense	3.8		3.8
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		78
Issuance of shares under stock plans, net	(1)		(1)
Pension and other postretirement employee benefit plans, net of tax	$ 1.1				1.1
Stock Repurchased and Retired During Period, Shares	(119)
Stock Repurchased and Retired During Period, Value	$ (3.9)		(3.9)
Ending balance (in shares) at Jun. 30, 2022		16,770
Ending balance at Jun. 30, 2022	544.7	$ 0	23	562	(40.3)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent	0.4
Net income	20.6			20.6
Stock-based compensation expense	3		3
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		23
Issuance of shares under stock plans, net	0.7		0.7
Pension and other postretirement employee benefit plans, net of tax	$ 1.1				1.1
Stock Repurchased and Retired During Period, Shares	(31)
Stock Repurchased and Retired During Period, Value	$ (1)		(1)
Ending balance (in shares) at Sep. 30, 2022		16,762
Ending balance at Sep. 30, 2022	569.2	$ 0	25.7	582.7	(39.1)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent	0.4
Beginning balance (in shares) at Dec. 31, 2022		16,762
Beginning balance at Dec. 31, 2022	572.1	$ 0	28.5	576.8	(33.3)
Net income	23.8			23.8
Stock-based compensation expense	2.2		2.2
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		242
Issuance of shares under stock plans, net	(4.2)		(4.2)
Pension and other postretirement employee benefit plans, net of tax	(0.1)				(0.1)
Stock Repurchased and Retired During Period, Shares		(51)
Stock Repurchased and Retired During Period, Value	(1.7)		(1.7)
Ending balance (in shares) at Mar. 31, 2023		16,953
Ending balance at Mar. 31, 2023	592	$ 0	24.7	600.6	(33.4)
Beginning balance (in shares) at Dec. 31, 2022		16,762
Beginning balance at Dec. 31, 2022	572.1	$ 0	28.5	576.8	(33.3)
Net income	90.1
Ending balance (in shares) at Sep. 30, 2023		16,563
Ending balance at Sep. 30, 2023	648.5	$ 0	15.1	666.9	(33.5)
Beginning balance (in shares) at Mar. 31, 2023		16,953
Beginning balance at Mar. 31, 2023	592	$ 0	24.7	600.6	(33.4)
Net income	29.7			29.7
Stock-based compensation expense	1.7		1.7
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		18
Issuance of shares under stock plans, net	(0.4)		(0.4)
Pension and other postretirement employee benefit plans, net of tax	(0.1)				(0.1)
Stock Repurchased and Retired During Period, Shares		(263)
Stock Repurchased and Retired During Period, Value	(8.4)		(8.4)
Ending balance (in shares) at Jun. 30, 2023		16,708
Ending balance at Jun. 30, 2023	614.5	$ 0	17.7	630.3	(33.4)
Net income	36.6			36.6
Stock-based compensation expense	2.5		2.5
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		6
Issuance of shares under stock plans, net	(0.1)		(0.1)
Pension and other postretirement employee benefit plans, net of tax	(0.1)				(0.1)
Stock Repurchased and Retired During Period, Shares		(150)
Stock Repurchased and Retired During Period, Value	(5)		(5)
Ending balance (in shares) at Sep. 30, 2023		16,563
Ending balance at Sep. 30, 2023	$ 648.5	$ 0	$ 15.1	$ 666.9	$ (33.5)

Consolidated Statements of St_2

Consolidated Statements of Stockholder's Equity (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Statement of Stockholders' Equity [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent	$ 0.4	$ 0.4	$ 0.4

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Nature of Operations and Basis of Presentation	Basis of PresentationThe accompanying unaudited consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, in the opinion of management, include all adjustments (consisting of normal recurring adjustments) necessary to present fairly, in all material respects, the consolidated financial position, results of operations, stockholders' equity and cash flows for us and our subsidiaries for the interim periods presented. Results of operations for interim periods are not necessarily indicative of results to be expected for an entire year. These consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2022. All dollar amounts are shown in millions, except per share.

Recently Adopted and New Accoun

Recently Adopted and New Accounting Standards New Accounting Pronouncements (Notes)	9 Months Ended
	Sep. 30, 2023
Accounting Standards Update and Change in Accounting Principle [Abstract]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	Recently Adopted Accounting Standards In September 2022, the Financial Accounting Standards Board issued Accounting Standards Update ("ASU") No. 2022-04, Liabilities—Supplier Finance Programs (Subtopic 405-50) . This standard requires disclosure of the key terms of outstanding supplier finance programs and a roll forward of the related obligations. The new standard does not affect the recognition, measurement or financial statement presentation of supplier finance program obligations. The ASU became effective January 1, 2023, except for the roll forward requirement, which becomes effective January 1, 2024. This ASU, except for the roll forward requirement, was adopted retrospectively as of January 1, 2023 and did not have a material impact on our consolidated financial statements other than expanded disclosures.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Carrying amounts reported on the consolidated balance sheets for cash and cash equivalents, restricted cash, accounts receivable and accounts payable approximate fair value due to the short-term maturity of these instruments. The fair value of our debt is included in the following table: September 30, 2023 December 31, 2022 2014 Notes, maturing 2025, fixed interest rate $ 262.6 $ 263.1 2020 Notes, maturing 2028, fixed interest rate 234.4 241.2 $ 497.0 $ 504.3

Receivables, net (Notes)

Receivables, net (Notes)	9 Months Ended
	Sep. 30, 2023
Receivables, Net, Current [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	Receivables Receivables consist of: September 30, 2023 December 31, 2022 Trade accounts receivable $ 164.9 $ 167.6 Allowance for current expected credit losses (1.5) (1.4) Unbilled receivables 4.0 9.1 Taxes receivable 2.6 10.6 Other 3.1 2.9 $ 173.0 $ 188.8

Inventories

Inventories	9 Months Ended
	Sep. 30, 2023
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories are stated at the lower of net realizable value or current cost using the average cost method and consist of: September 30, 2023 December 31, 2022 Logs, chips and sawdust $ 20.9 $ 23.6 Pulp 14.8 16.8 Paperboard and tissue products 175.3 171.9 Materials and supplies 122.4 111.7 $ 333.3 $ 324.0

Property, Plant, and Equipment

Property, Plant, and Equipment	9 Months Ended
	Sep. 30, 2023
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment Disclosure	Property, plant and equipment Property, plant and equipment consist of: September 30, 2023 December 31, 2022 Land and land improvements $ 106.1 $ 106.1 Buildings and improvements 458.2 456.8 Machinery and equipment 2,358.4 2,346.5 Construction in progress 49.3 23.9 2,972.1 2,933.4 Less accumulated depreciation and amortization (1,978.3) (1,916.3) Property, plant and equipment, net $ 993.8 $ 1,017.1

Payables and Accruals

Payables and Accruals	9 Months Ended
	Sep. 30, 2023
Payables and Accruals [Abstract]
Accounts Payable and Accrued Liabilities Disclosure	Accounts Payable and Accrued Liabilities Accounts payable and accrued liabilities consist of: September 30, 2023 December 31, 2022 Trade payables $ 164.8 $ 213.0 Accrued compensation 41.4 41.9 Operating lease liabilities 14.6 12.0 Other accrued liabilities 39.2 44.2 $ 260.0 $ 311.1 Included in accounts payable and accrued liabilities are $16.5 million and $15.7 million related to capital expenditures that had not yet been paid as of September 30, 2023 and December 31, 2022. We maintain a program with a financial institution to provide our vendors with an option to receive payment earlier than our standard payment terms. Vendors receive payment directly from the financial institution . We are obligated to repay the financial institution in the next billing cycle which is generally 35 to 60 days later than payment to the supplier. As of September 30, 2023 and December 31, 2022, $11.8 million and $14.5 million of outstanding obligations under this program were included in other accrued liabilities in the Consolidated Balance Sheets.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Taxes	Income Taxes For interim periods, accounting standards require that income tax expense be determined by applying the estimated annual effective income tax rate to year-to-date results, unless this method does not result in a reliable estimate of year-to-date income tax expense. Each period, the income tax accrual is adjusted to the latest estimate and the difference from the previously accrued year-to-date balance is adjusted to the current quarter. For the nine months ended September 30, 2023, our income tax provision was $29.6 million as compared to $29.3 million in the same period in 2022. Our effective tax rate for the nine months ended September 30, 2023 was 24.7%, which varied from the U.S. federal statutory tax rate of 21.0% primarily due to the effects of state taxes and nondeductible compensation. Our effective tax rate for the nine months ended September 30, 2022 was 36.1%, which varied from the U.S. federal statutory tax rate of 21.0% primarily due to adjustments in tax positions under audit related to the disallowance of a previously taken federal tax credits based upon interpretation of the law, the effects of state taxes, and nondeductible compensation.

Other Operating Charges, net (N

Other Operating Charges, net (Notes)	9 Months Ended
	Sep. 30, 2023
Other Income and Expenses [Abstract]
Other Operating Income and Expense	Other Operating Charges The major components of “Other operating charges, net” in the Consolidated Statements of Operations for the quarter and nine months ended September 30, 2023 and 2022 are reflected in the table below and described in the paragraphs following the table. These items are considered outside of our core operations. Quarter Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Reorganization and other expenses $ — $ — $ — $ 1.6 Costs associated with mill closure — — — 0.4 Loss on sale or impairment associated with assets 0.3 1.2 1.4 5.8 Directors' equity-based compensation expense 1.0 1.0 0.6 0.7 Other 0.5 — 0.4 — $ 1.8 $ 2.2 $ 2.4 $ 8.5 2023 During the third quarter of 2023, we recorded $1.8 million of expense in "Other operating charges, net." The main components of the expense include: • loss of $0.3 million associated with the impairment of equipment and related spare parts no longer being used; and • expense of $1.0 million relating to directors' equity-based compensation which is remeasured each period based upon changes in our stock price. During the second quarter of 2023, we recorded $0.4 million of income in "Other operating charges, net." The main components of the income include: • reversal of expense of $0.2 million relating to directors' equity-based compensation which is remeasured each period based upon changes in our stock price. During the first quarter of 2023, we recorded $1.1 million of expense in "Other operating charges, net." The main components of the expense include: • loss of $1.1 million associated with the impairment of equipment and related spare parts no longer being used; and • reversal of expense of $0.2 million relating to directors' equity-based compensation which is remeasured each period based upon changes in our stock price. 2022 During the third quarter of 2022, we recorded $2.2 million of expense in "Other operating charges, net." The components of the expense include: • loss of $1.2 million associated with the impairment of equipment no longer being used; and • expense of $1.0 million relating to directors' equity-based compensation which is remeasured each period based upon changes in our stock price. During the second quarter of 2022, we recorded $5.7 million of expense in "Other operating charges, net." The components of the expense include: • loss of $4.6 million associated with the impairment of equipment previously located at a closed facility which will not be re-installed; and • expense of $1.1 million relating to directors' equity-based compensation which is remeasured each period based upon changes in our stock price. During the first quarter of 2022, we recorded $0.5 million of expense in "Other operating charges, net." The components of the expense include: • expense of $1.5 million related to reorganization and other expenses including consulting fees associated with our efforts to achieve long-term performance improvements; • expense of $0.4 million associated with mill closure costs; and • reversal of expense of $1.4 million relating to directors' equity-based compensation which is remeasured each period based upon changes in our stock price.

Non-operating Income (Expense)

Non-operating Income (Expense) (Notes)	9 Months Ended
	Sep. 30, 2023
Nonoperating Income (Expense) [Abstract]
Other Nonoperating Income and Expense [Text Block]	Non-Operating Expense The components of “Non-operating expense” in the Consolidated Statements of Operations for the quarter and nine months ended September 30, 2023 and 2022 are reflected in the table below: Quarter Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Interest expense $ (7.4) $ (8.0) $ (22.6) $ (26.6) Amortization of deferred debt costs (0.3) (0.4) (0.9) (1.2) Interest income 0.9 0.3 1.5 0.4 Interest expense, net (6.9) (8.0) (22.0) (27.3) Debt retirement costs — — — (0.5) Non-operating pension and other postretirement employee benefits (expense) 0.1 (1.4) 0.3 (4.3) Total non-operating expense $ (6.8) $ (9.4) $ (21.7) $ (32.1)

Retirement Plans and Postretire

Retirement Plans and Postretirement Benefits	9 Months Ended
	Sep. 30, 2023
Postemployment Benefits [Abstract]
Pension and Other Postretirement Employee Benefit Plans	Retirement Plans and Postretirement Benefits The following table details the components of net periodic cost of our company-sponsored pension and other postretirement employee benefit plans for the periods presented: Quarter Ended September 30, Nine Months Ended September 30, Pension Benefit Plans 2023 2022 2023 2022 Service cost $ 0.9 $ 0.5 $ 2.6 $ 1.6 Interest cost 3.1 2.2 9.3 6.6 Expected return on plan assets (3.8) (2.8) (11.4) (8.5) Amortization of actuarial loss — 1.5 0.1 4.6 Net periodic cost $ 0.2 $ 1.5 $ 0.6 $ 4.4 Quarter Ended September 30, Nine Months Ended September 30, Other Postretirement Employee Benefit Plans 2023 2022 2023 2022 Service cost $ — $ 0.1 $ 0.1 $ 0.3 Interest cost 0.7 0.5 2.1 1.5 Amortization of actuarial gain (0.1) — (0.4) — Net periodic cost $ 0.6 $ 0.6 $ 1.8 $ 1.8

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss (Notes)	9 Months Ended
	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Accumulated Other Comprehensive Loss Accumulated other comprehensive loss, net of tax, is comprised of the following: Pension Plan Adjustments Other Post Retirement Employee Benefit Plan Adjustments Total Balance at December 31, 2021 $ (42.8) $ 0.3 $ (42.6) Amounts reclassified from accumulated other comprehensive loss 3.5 — 3.5 Balance at September 30, 2022 $ (39.4) $ 0.3 $ (39.1) Balance at December 31, 2022 $ (46.5) $ 13.3 $ (33.3) Amounts reclassified from accumulated other comprehensive loss — (0.3) (0.2) Balance at September 30, 2023 $ (46.5) $ 13.0 $ (33.5)

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]
Equity-Based Compensation	Stockholders' Equity Common Stock Plans We have stock-based compensation plans under which restricted stock awards and stock options are outstanding or granted subject to time or performance vesting requirements. As of September 30, 2023, approximately 0.9 million shares were available for future issuance under our current plan. Quarter Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Total stock-based compensation expense $ 3.5 $ 4.0 $ 7.0 $ 9.6 Impact on cash flow due to taxes paid related to net share settlement of equity awards $ 0.1 $ — $ 4.7 $ 2.5 As of September 30, 2023, there was $14.6 million of total unrecognized compensation cost related to outstanding restricted stock unit awards. During the nine months ended September 30, 2023, we granted 216,379 restricted stock units (time vesting) at an average grant date fair value of $37.66 per share and 196,451 restricted stock units (performance vesting) at an average grant date fair value of $40.47 per share.

Earnings per Common Share

Earnings per Common Share	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Earnings per Common Share	Earnings per Share Basic income per share is based on the weighted-average number of shares of common stock outstanding. Diluted income per share is 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 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. Quarter Ended September 30, Nine Months Ended September 30, (In thousands) 2023 2022 2023 2022 Basic weighted-average common shares outstanding 16,682 16,754 16,800 16,777 Incremental shares due to: Stock-based awards 120 197 139 181 Performance shares 94 137 112 127 Stock options — 6 — — Diluted weighted-average common shares outstanding 16,895 17,093 17,051 17,085 Shares excluded from the computation of diluted earnings per share were 0.3 million and 0.4 million for the quarter and nine months ended September 30, 2023 and 0.2 million and 0.3 million for the quarter and nine months ended September 30, 2022 as they were either antidilutive (not in-the-money) or the required performance conditions were not met.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
Segment Information	Segment Information We operate in two segments: Pulp and Paperboard and Consumer Products. Our business units have been aggregated into these two segments based upon the similarity of economic characteristics, customers and distribution methods. Our results of operations are summarized below for each of these segments separately. Segment information was prepared in accordance with the same accounting principles as those described in Note 1 of the Notes to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2022. Quarter Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Segment net sales: Pulp and Paperboard $ 261.4 $ 300.8 $ 812.4 $ 862.8 Consumer Products 259.3 241.0 761.3 696.1 Eliminations (0.8) (3.0) (3.8) (5.6) Net sales $ 519.9 $ 538.8 $ 1,569.9 $ 1,553.3 Operating income (loss): Pulp and Paperboard $ 42.7 $ 63.7 $ 141.8 $ 165.9 Consumer Products 31.4 5.2 60.6 9.6 Corporate and eliminations (18.0) (17.8) (58.5) (53.8) Other operating charges, net (1.8) (2.2) (2.4) (8.5) Income from operations $ 54.4 $ 48.9 $ 141.5 $ 113.3 Net sales, classified by major products, were as follows: Quarter Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Major products: Paperboard $ 253.8 $ 292.7 $ 789.7 $ 834.6 Retail tissue 257.7 237.1 756.5 682.3 Pulp 5.3 4.6 15.5 18.5 Other 4.0 7.3 12.1 23.5 Eliminations (0.8) (3.0) (3.8) (5.6) Total net sales $ 519.9 $ 538.8 $ 1,569.9 $ 1,553.3

Subsequent Events

Subsequent Events	3 Months Ended
	Sep. 30, 2023
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn October 27, 2023, we notified the holders of our 5.375% Senior Notes due 2025 that we elected to redeem all of the currently outstanding $270 million aggregate principal amount on November 27, 2023. In connection with the redemption of these notes, we entered into a new revolving term credit agreement with an initial draw of $150 million. This amount along with cash on hand and a $60 million draw on our existing ABL facility was irrevocably deposited with the Trustee to fund the redemption of these notes on the Redemption Date. As a result of this deposit, our obligations under the Indenture have been discharged.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net income	$ 36.6	$ 29.7	$ 23.8	$ 20.6	$ 14.7	$ 16.6	$ 90.1	$ 51.9

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2023
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	During the quarter ended September 30, 2023, none of our officers or directors adopted or terminated a Rule 10b5-1 arrangement or non-Rule 10b5-1 trading arrangement, as each is defined in Item 408(a) of regulation S-K.
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Fair Value Measurements - (Tabl

Fair Value Measurements - (Tables)	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Option, Disclosures	The fair value of our debt is included in the following table: September 30, 2023 December 31, 2022 2014 Notes, maturing 2025, fixed interest rate $ 262.6 $ 263.1 2020 Notes, maturing 2028, fixed interest rate 234.4 241.2 $ 497.0 $ 504.3

Receivables, net (Tables)

Receivables, net (Tables)	9 Months Ended
	Sep. 30, 2023
Receivables, Net, Current [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	September 30, 2023 December 31, 2022 Trade accounts receivable $ 164.9 $ 167.6 Allowance for current expected credit losses (1.5) (1.4) Unbilled receivables 4.0 9.1 Taxes receivable 2.6 10.6 Other 3.1 2.9 $ 173.0 $ 188.8

Inventories - (Tables)

Inventories - (Tables)	9 Months Ended
	Sep. 30, 2023
Inventory Disclosure [Abstract]
Inventories	Inventories are stated at the lower of net realizable value or current cost using the average cost method and consist of: September 30, 2023 December 31, 2022 Logs, chips and sawdust $ 20.9 $ 23.6 Pulp 14.8 16.8 Paperboard and tissue products 175.3 171.9 Materials and supplies 122.4 111.7 $ 333.3 $ 324.0

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	9 Months Ended
	Sep. 30, 2023
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, plant and equipment consist of: September 30, 2023 December 31, 2022 Land and land improvements $ 106.1 $ 106.1 Buildings and improvements 458.2 456.8 Machinery and equipment 2,358.4 2,346.5 Construction in progress 49.3 23.9 2,972.1 2,933.4 Less accumulated depreciation and amortization (1,978.3) (1,916.3) Property, plant and equipment, net $ 993.8 $ 1,017.1

Payables and Accruals (Tables)

Payables and Accruals (Tables)	9 Months Ended
	Sep. 30, 2023
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Accrued Liabilities	Accounts payable and accrued liabilities consist of: September 30, 2023 December 31, 2022 Trade payables $ 164.8 $ 213.0 Accrued compensation 41.4 41.9 Operating lease liabilities 14.6 12.0 Other accrued liabilities 39.2 44.2 $ 260.0 $ 311.1

Other Operating Charges, net (T

Other Operating Charges, net (Tables)	9 Months Ended
	Sep. 30, 2023
Other Income and Expenses [Abstract]
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]	Quarter Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Reorganization and other expenses $ — $ — $ — $ 1.6 Costs associated with mill closure — — — 0.4 Loss on sale or impairment associated with assets 0.3 1.2 1.4 5.8 Directors' equity-based compensation expense 1.0 1.0 0.6 0.7 Other 0.5 — 0.4 — $ 1.8 $ 2.2 $ 2.4 $ 8.5

Non-operating Income (Expense_2

Non-operating Income (Expense) (Tables)	9 Months Ended
	Sep. 30, 2023
Nonoperating Income (Expense) [Abstract]
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	Quarter Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Interest expense $ (7.4) $ (8.0) $ (22.6) $ (26.6) Amortization of deferred debt costs (0.3) (0.4) (0.9) (1.2) Interest income 0.9 0.3 1.5 0.4 Interest expense, net (6.9) (8.0) (22.0) (27.3) Debt retirement costs — — — (0.5) Non-operating pension and other postretirement employee benefits (expense) 0.1 (1.4) 0.3 (4.3) Total non-operating expense $ (6.8) $ (9.4) $ (21.7) $ (32.1)

Retirement Plans and Postreti_2

Retirement Plans and Postretirement Benefits - (Tables)	9 Months Ended
	Sep. 30, 2023
Retirement Benefits [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 other postretirement employee benefit plans for the periods presented: Quarter Ended September 30, Nine Months Ended September 30, Pension Benefit Plans 2023 2022 2023 2022 Service cost $ 0.9 $ 0.5 $ 2.6 $ 1.6 Interest cost 3.1 2.2 9.3 6.6 Expected return on plan assets (3.8) (2.8) (11.4) (8.5) Amortization of actuarial loss — 1.5 0.1 4.6 Net periodic cost $ 0.2 $ 1.5 $ 0.6 $ 4.4 Quarter Ended September 30, Nine Months Ended September 30, Other Postretirement Employee Benefit Plans 2023 2022 2023 2022 Service cost $ — $ 0.1 $ 0.1 $ 0.3 Interest cost 0.7 0.5 2.1 1.5 Amortization of actuarial gain (0.1) — (0.4) — Net periodic cost $ 0.6 $ 0.6 $ 1.8 $ 1.8

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	Accumulated other comprehensive loss, net of tax, is comprised of the following: Pension Plan Adjustments Other Post Retirement Employee Benefit Plan Adjustments Total Balance at December 31, 2021 $ (42.8) $ 0.3 $ (42.6) Amounts reclassified from accumulated other comprehensive loss 3.5 — 3.5 Balance at September 30, 2022 $ (39.4) $ 0.3 $ (39.1) Balance at December 31, 2022 $ (46.5) $ 13.3 $ (33.3) Amounts reclassified from accumulated other comprehensive loss — (0.3) (0.2) Balance at September 30, 2023 $ (46.5) $ 13.0 $ (33.5)

Stockholders' Equity - (Tables)

Stockholders' Equity - (Tables)	9 Months Ended
	Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]
Employee Equity-Based Compensation Expense	Quarter Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Total stock-based compensation expense $ 3.5 $ 4.0 $ 7.0 $ 9.6 Impact on cash flow due to taxes paid related to net share settlement of equity awards $ 0.1 $ — $ 4.7 $ 2.5

Earnings per Common Share - (Ta

Earnings per Common Share - (Tables)	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted Net Earnings per Share	Quarter Ended September 30, Nine Months Ended September 30, (In thousands) 2023 2022 2023 2022 Basic weighted-average common shares outstanding 16,682 16,754 16,800 16,777 Incremental shares due to: Stock-based awards 120 197 139 181 Performance shares 94 137 112 127 Stock options — 6 — — Diluted weighted-average common shares outstanding 16,895 17,093 17,051 17,085

Segment Information - (Tables)

Segment Information - (Tables)	9 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
Reportable Segments Information	Quarter Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Segment net sales: Pulp and Paperboard $ 261.4 $ 300.8 $ 812.4 $ 862.8 Consumer Products 259.3 241.0 761.3 696.1 Eliminations (0.8) (3.0) (3.8) (5.6) Net sales $ 519.9 $ 538.8 $ 1,569.9 $ 1,553.3 Operating income (loss): Pulp and Paperboard $ 42.7 $ 63.7 $ 141.8 $ 165.9 Consumer Products 31.4 5.2 60.6 9.6 Corporate and eliminations (18.0) (17.8) (58.5) (53.8) Other operating charges, net (1.8) (2.2) (2.4) (8.5) Income from operations $ 54.4 $ 48.9 $ 141.5 $ 113.3
Disaggregation of Revenue [Table Text Block]	Net sales, classified by major products, were as follows: Quarter Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Major products: Paperboard $ 253.8 $ 292.7 $ 789.7 $ 834.6 Retail tissue 257.7 237.1 756.5 682.3 Pulp 5.3 4.6 15.5 18.5 Other 4.0 7.3 12.1 23.5 Eliminations (0.8) (3.0) (3.8) (5.6) Total net sales $ 519.9 $ 538.8 $ 1,569.9 $ 1,553.3

Fair Value Measurements (Detail

Fair Value Measurements (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Option, Quantitative Disclosures [Line Items]
Long-term Debt, Fair Value	$ 497	$ 504.3
Senior Note Due 2025 [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Long-term Debt, Fair Value	262.6	263.1
Senior Note Due 2028 [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Long-term Debt, Fair Value	$ 234.4	$ 241.2

Receivables, net (Details)

Receivables, net (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Receivables, Net, Current [Abstract]
Trade accounts receivable	$ 164.9	$ 167.6
Accounts Receivable, Allowance for Credit Loss, Current	(1.5)	(1.4)
Unbilled Receivables, Current	4	9.1
Income Taxes Receivable, Current	2.6	10.6
Other Receivables, Net, Current	3.1	2.9
Receivables, Net	$ 173	$ 188.8

Inventories - Inventories (Deta

Inventories - Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Inventory Disclosure [Abstract]
Inventories	$ 333.3	$ 324
Inventory [Line Items]
Inventory, Finished Goods, Net of Reserves	175.3	171.9
Inventory, Supplies, Net of Reserves	122.4	111.7
Inventories	333.3	324
Inventory Pulp
Inventory [Line Items]
Inventory, Raw Materials, Net of Reserves	14.8	16.8
Inventories
Inventory [Line Items]
Inventory, Raw Materials, Net of Reserves	$ 20.9	$ 23.6

Property, Plant, and Equipmen_2

Property, Plant, and Equipment (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 2,972.1	$ 2,933.4
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(1,978.3)	(1,916.3)
Property, Plant and Equipment, Net	993.8	1,017.1
Land and Land Improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	106.1	106.1
Building and Building Improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	458.2	456.8
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,358.4	2,346.5
Construction in Progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 49.3	$ 23.9

Payables and Accruals (Details)

Payables and Accruals (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Payables and Accruals [Abstract]
Trade payables	$ 164.8		$ 213
Accrued compensation	41.4		41.9
Operating Lease, Liability, Current	14.6		12
Other Accrued Liabilities, Current	39.2		44.2
Accounts Payable and Accrued Liabilities	260		311.1
Capital Expenditures Incurred but Not yet Paid	16.5	$ 7.3	15.7
Supplier Finance Program, Obligation	$ 11.8		$ 14.5

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 11	$ 18.9	$ 29.6	$ 29.3
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21%

Other Operating Charges, net (D

Other Operating Charges, net (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Other Operating Income (Expense), Net	$ 1.8	$ (0.4)	$ 1.1	$ 2.2	$ 5.7	$ 0.5	$ 2.4	$ 8.5
Operating Expense
Reorganization Items	0			0		1.5	0	1.6
Asset Impairment Charges	0.3		1.1	1.2	4.6		1.4	5.8
Operating Expense | Mill Closure Costs
Other Expenses	0			0		0.4	0	0.4
Other Income
Other Operating Income	0.5			0			0.4	0
Director [Member]
Share based compensation expense	$ 1	$ (0.2)	$ (0.2)	$ 1	$ 1.1	$ (1.4)	$ 0.6	$ 0.7

Non-operating Income (Expense_3

Non-operating Income (Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Nonoperating Income (Expense) [Abstract]
Interest Expense	$ (7.4)	$ (8)	$ (22.6)	$ (26.6)
Amortization of Debt Issuance Costs	(0.3)	(0.4)	(0.9)	(1.2)
Interest Income, Other	0.9	0.3	1.5	0.4
Interest Expense, Net	(6.9)	(8)	(22)	(27.3)
Gain (Loss) on Extinguishment of Debt	0	0	0	(0.5)
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	0.1	(1.4)	0.3	(4.3)
Total non-operating expense	$ (6.8)	$ (9.4)	$ (21.7)	$ (32.1)

Retirement Plans and Postreti_3

Retirement Plans and Postretirement Benefits - Narrative (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 0.9	$ 0.5	$ 2.6	$ 1.6
Interest cost	3.1	2.2	9.3	6.6
Expected return on plan assets	(3.8)	(2.8)	(11.4)	(8.5)
Defined Benefit Plan, Amortization of Gain (Loss)	0	1.5	0.1	4.6
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	0.2	1.5	0.6	4.4
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	0	0.1	0.1	0.3
Interest cost	0.7	0.5	2.1	1.5
Defined Benefit Plan, Amortization of Gain (Loss)	(0.1)	0	(0.4)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	0.6	0.6	1.8	1.8
Cost of Sales [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	0.8	0.5	2.3	1.6
Selling, General and Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	$ 0.1	$ 0.1	$ 0.4	$ 0.3

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (33.5)	$ (39.1)	$ (33.3)	$ (42.6)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(0.2)	3.5
Pension Plan [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(46.5)	(39.4)	(46.5)	(42.8)
Pension Plan [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	3.5
Other Postretirement Benefits Plan [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	13	0.3	$ 13.3	$ 0.3
Other Postretirement Benefits Plan [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ (0.3)	$ 0

Stockholders' Equity - (Detail)

Stockholders' Equity - (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	900,000		900,000
Equity-based compensation expense	$ 3.5	$ 4	$ 7	$ 9.6
Payment, Tax Withholding, Share-based Payment Arrangement	0.1	$ 0	4.7	$ 2.5
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 14.6		$ 14.6
Weighted Average Number of Shares Outstanding, Basic	16,682,000	16,754,000	16,800,000	16,777,000
Weighted Average Number of Shares Outstanding, Diluted	16,895,000	17,093,000	17,051,000	17,085,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based awards granted			216,379
Grant-date fair value of awards per share			$ 37.66
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	120,000	197,000	139,000	181,000
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based awards granted			196,451
Grant-date fair value of awards per share			$ 40.47
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	94,000	137,000	112,000	127,000
Equity Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0	6,000	0	0

Earnings per Common Share - Rec

Earnings per Common Share - Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted Net Earnings Per Share (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Number of Shares Outstanding, Basic	16,682	16,754	16,800	16,777
Weighted Average Number of Shares Outstanding, Diluted	16,895	17,093	17,051	17,085
Anti-dilutive shares excluded from calculation	300	200	400	300
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	120	197	139	181
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	94	137	112	127

Segment Information (Detail)

Segment Information (Detail) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Net Sales	$ 519.9			$ 538.8			$ 1,569.9	$ 1,553.3
Income from operations	54.4			48.9			141.5	113.3
Other operating charges, net	(1.8)	$ 0.4	$ (1.1)	(2.2)	$ (5.7)	$ (0.5)	(2.4)	(8.5)
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Sales	(0.8)			(3)			(3.8)	(5.6)
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Income from operations	(18)			(17.8)			(58.5)	(53.8)
Paperboard [Domain]
Segment Reporting Information [Line Items]
Net Sales	253.8			292.7			756.5	682.3
Retail tissue [Domain]
Segment Reporting Information [Line Items]
Net Sales	257.7			237.1			789.7	834.6
Pulp [Domain]
Segment Reporting Information [Line Items]
Net Sales	5.3			4.6			15.5	18.5
Other [Domain]
Segment Reporting Information [Line Items]
Net Sales	4			7.3			12.1	23.5
Pulp And Paperboard [Member] | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	261.4			300.8			812.4	862.8
Income from operations	42.7			63.7			141.8	165.9
Consumer Products | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	259.3			241			761.3	696.1
Income from operations	$ 31.4			$ 5.2			$ 60.6	$ 9.6

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event - USD ($)	Nov. 27, 2023	Oct. 27, 2023
Subsequent Event [Line Items]
Long-term Debt, Gross	$ 270
Long-Term Line of Credit, Noncurrent		$ 150
Revolving Credit Facility
Subsequent Event [Line Items]
Other Borrowings		$ 60