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Long-Term Debt - Additional Information (Detail) - USD ($) $ in Thousands			3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
		Apr. 13, 2021	Sep. 30, 2025	Sep. 30, 2025	Sep. 28, 2024	Jun. 24, 2025	Sep. 28, 2024	Dec. 28, 2024	Jan. 31, 2025	Jan. 02, 2025
Debt Instrument
Interest expense			$ 12,975	$ 12,052	$ 28,619	$ 38,664	$ 81,923
Loan outstanding amount			$ 465,000	$ 465,000				$ 1,445,000
Effective interest rate	[1]							7.74%
Average interest rate on outstanding debt, exclusive the impact of swap			11.07%	11.07%				7.75%
Average interest rate on outstanding debt, including the impact of swap								7.47%
4.500% Senior Secured Notes due 2029
Debt Instrument
Debt Instrument, maturity year		2029
Debt Instrument Interest Rate Stated Percentage		4.50%
Loan outstanding amount		$ 500,000
Aggregate principal amount		500,000
Term Loan Facility due April 13, 2028
Debt Instrument
Loan outstanding amount								$ 945,000
Effective interest rate	[1]							9.37%
New Term Loan Facility due June 24, 2030
Debt Instrument
Loan outstanding amount			$ 465,000	$ 465,000		465,000
Line of credit facility, issued but undrawn letters of credit			$ 3,659	3,659
Percentage of net proceeds of any issuance or incurrence of debt by the Company or any of its restricted subsidiaries			100.00%
Excess of unrestricted cash			$ 100,000	$ 100,000
Percentage of proceeds from the sale of certain assets and proceeds of certain casualty events			100.00%
Percentage of incurrence of new debt proceeds			100.00%
Percentage of aggregate principal amount of prepayments or refinancings, for first eighteen months following emergence date			2.00%
Percentage of aggregate principal amount of prepayments or refinancings, from eighteen-month anniversary of emergence Date to second anniversary of emergence Date			2.00%
Percentage of aggregate principal amount of prepayments or refinancings, from second anniversary of emergence date to third anniversary of emergence date			1.00%
Excess of aggregate principal amount of prepayments or refinancings			$ 200,000
Effective interest rate	[1]		11.07%	11.07%
New Term Loan Facility due June 24, 2030 | Federal Funds Effective Rate
Debt Instrument
Credit facility, interest rate			0.50%
New Term Loan Facility due June 24, 2030 | Term SOFR
Debt Instrument
Credit facility, interest rate			6.80%
Debt instrument variable rate floor percentage			0.50%
New Term Loan Facility due June 24, 2030 | One-Month Term SOFR
Debt Instrument
Credit facility, interest rate			1.00%
Debt instrument variable rate floor percentage			1.50%
New Term Loan Facility due June 24, 2030 | Twelve-Month Term SOFR
Debt Instrument
Credit facility, interest rate			5.80%
New Term Loan Facility
Debt Instrument
Aggregate principal amount			$ 465,492	$ 465,492
Effective interest rate			10.80%	10.80%
Senior Secured Notes due April 15, 2029
Debt Instrument
Loan outstanding amount								$ 500,000
Effective interest rate	[1]							4.69%
Prepetition Credit Agreement
Debt Instrument
Credit Facility, maximum borrowing capacity		$ 1,175,000
Prepetition Credit Facilities and Prepetition Credit Agreement
Debt Instrument
Discharge of outstanding liabilities						1,116,000
Prepetition Term Loan Facility
Debt Instrument
Debt Instrument, maturity year		2028
Credit Facility, maximum borrowing capacity		$ 1,000,000
Contractual interest on obligations						15,412
Excess contractual interest on obligations						$ 4,351
Prepetition Revolving Credit Facility
Debt Instrument
Debt Instrument, maturity year		2026
Credit Facility, maximum borrowing capacity		$ 175,000
Loan outstanding amount									$ 121,341	$ 50,000
Revolving Credit Facility
Debt Instrument
Effective interest rate	[1]							0.00%
[1] Includes amortization of deferred financing costs and debt discount.

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