Debt Instrument, Debt Covenant, Required Net Leverage Ratio

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- Definition

Debt Instrument, Prepayment Additional Premium, Percentage Of Principal Amount

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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- Definition

Amount of the fee that accompanies borrowing money under the debt instrument.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of the required periodic payments applied to principal.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Gross amount of debt extinguished.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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Basis of Presentation - Debt Issuance and Redemption (Details)	1 Months Ended		3 Months Ended	5 Months Ended	9 Months Ended		12 Months Ended			24 Months Ended
	Oct. 31, 2024 USD ($)	Apr. 30, 2023 USD ($)	Dec. 31, 2024 USD ($)	Oct. 31, 2026	Sep. 28, 2024 USD ($)	Sep. 30, 2023 USD ($)	Oct. 31, 2027	Oct. 31, 2026	Oct. 31, 2025	Oct. 31, 2029	Mar. 29, 2027	Dec. 31, 2026	Sep. 26, 2026	Jun. 27, 2026	Mar. 28, 2026	Dec. 31, 2025	Sep. 27, 2025	Jun. 28, 2025	Mar. 29, 2025	Jan. 31, 2024 USD ($)
Debt Instrument [Line Items]
Net proceeds from issuance of long-term debt					$ 232,200,000	$ 303,217,000
Forecast
Debt Instrument [Line Items]
Loss on extinguishment of debt			$ 19,000,000
Subsequent Event \| Asset-Based Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity	$ 175,000,000
Line of credit \| Subsequent Event \| Asset-Based Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread	2.00%
Line of credit facility, term	5 years
2029 Term Loan \| Secured Debt \| Subsequent Event
Debt Instrument [Line Items]
Aggregate principal amount	$ 700,000,000
Net proceeds from issuance of long-term debt	$ 683,000,000
Basis spread	7.00%
Quarterly principal payments	$ 1,750,000
2029 Term Loan \| Secured Debt \| Subsequent Event \| Minimum
Debt Instrument [Line Items]
Basis spread	6.50%
Secured net leverage ratio	2.5
2029 Term Loan \| Secured Debt \| Subsequent Event \| Maximum
Debt Instrument [Line Items]
Basis spread	7.50%
Secured net leverage ratio	3.5
2029 Term Loan \| Secured Debt \| Subsequent Event \| Forecast
Debt Instrument [Line Items]
Debt issuance fees			$ 30,000,000
Secured net leverage ratio			5.00								4.50	4.75	4.75	4.75	4.75	5.00	5.00	5.00	5.00
2029 Term Loan \| Secured Debt \| Subsequent Event \| Forecast \| Voluntary prepayments
Debt Instrument [Line Items]
Percentage of premium prepayment				2.00%			1.00%
2029 Term Loan \| Secured Debt \| Subsequent Event \| Forecast \| Prepayments from sales proceeds of Paperboard and High-Yield Pulp businesses
Debt Instrument [Line Items]
Percentage of premium prepayment								1.00%	2.00%
7.625% Senior Secured Notes due January 2026 \| Senior Notes
Debt Instrument [Line Items]
Loss on extinguishment of debt		$ (1,000,000)
7.625% Senior Secured Notes due January 2026 \| Senior Notes \| Subsequent Event \| Forecast
Debt Instrument [Line Items]
Redemption of long-term debt			$ 453,000,000
2027 Term Loan \| Secured Debt
Debt Instrument [Line Items]
Debt issuance fees																				$ 3,000,000
Basis spread					8.00%
2027 Term Loan \| Secured Debt \| Subsequent Event \| Forecast
Debt Instrument [Line Items]
Redemption of long-term debt			$ 246,000,000