Amount of difference between fair value and book value of debt.

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Fixed charge coverage ratios.

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Line of credit facility maximum borrowing base capacity.

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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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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment.

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Amount of the required periodic payments including both interest and principal payments.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

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Average amount borrowed under the credit facility during the period.

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Description of the credit facility's borrowing capacity including discussion of how the borrowing capacity is determined (for example, borrowing capacity based on the amount of current assets).

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The effective interest rate during the reporting period.

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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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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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No definition available.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Debt - Narrative (Detail) - USD ($)						3 Months Ended		12 Months Ended
Debt - Narrative (Detail) - USD ($)	Apr. 28, 2021	Apr. 16, 2021	Apr. 15, 2021	Oct. 15, 2018	Sep. 29, 2017	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Debt Instrument [Line Items]
Amount of difference between fair value and book value						$ 170,600,000		$ 142,900,000
Repayment of debentures						1,400,000	$ 58,700,000
Interest paid, net of interest capitalized						22,900,000	23,500,000
Interest income from investments/other						400,000	$ 500,000
Subsequent Event \| 8.875% Debentures Due April 15, 2021
Debt Instrument [Line Items]
Repayment of debentures			$ 55,600,000
Subsequent Event \| 6.125% Senior Secured Notes Due 2026
Debt Instrument [Line Items]
Maturity date	Nov. 01, 2026
Debt instrument, aggregate principal amount	$ 400,000,000
Principal payments term	semi-annually
ABL Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity						$ 800,000,000.0
Maturity date				Sep. 29, 2022
Line of credit borrowing capacity description						The amount available to be borrowed under the ABL Credit Facility is equal to the lesser of (a) $650.0 million ($800.0 million as of March 31, 2021) and (b) a borrowing base formula based on the amount of accounts receivable, inventory, machinery, equipment and, if we were to so elect in the future subject to the satisfaction of certain conditions, fee-owned real estate of ours and our material domestic subsidiaries, subject to certain eligibility criteria and advance rates (collectively, the “Borrowing Base”). The aggregate amount of real estate, machinery and equipment that can be included in the Borrowing Base formula is limited to $175.0 million.
Line of Credit Facility, Maximum Borrowing Base Capacity					$ 175,000,000.0
Borrowing capacity available under credit agreement						$ 512,000,000.0
Weighted average interest rate on borrowings						1.60%	2.70%
Credit facility outstanding borrowing capacity							$ 0	$ 0
ABL Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Fixed charge coverage ratio					1.0
ABL Credit Facility \| Minimum
Debt Instrument [Line Items]
Unused line fee					0.25%
ABL Credit Facility \| Maximum
Debt Instrument [Line Items]
Unused line fee					0.375%
ABL Credit Facility \| Eurocurrency
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity					$ 800,000,000.0
ABL Credit Facility \| Eurocurrency \| Minimum
Debt Instrument [Line Items]
Interest rate margin on borrowings					1.25%
ABL Credit Facility \| Eurocurrency \| Maximum
Debt Instrument [Line Items]
Interest rate margin on borrowings					1.75%
ABL Credit Facility \| Base Rate \| Minimum
Debt Instrument [Line Items]
Interest rate margin on borrowings					0.25%
ABL Credit Facility \| Base Rate \| Maximum
Debt Instrument [Line Items]
Interest rate margin on borrowings					0.75%
ABL Credit Facility \| Subsequent Event
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 650,000,000.0
Maturity date		Apr. 16, 2026
ABL Credit Facility \| Subsequent Event \| Eurocurrency
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 650,000,000.0
Term Loan Credit Agreement \| Senior Secured Term Loan B
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount				$ 550,000,000.0
Term Loan
Debt Instrument [Line Items]
Maturity date				Jan. 15, 2024		Jan. 15, 2024		Jan. 15, 2024
Principal payments				$ 1,400,000
Principal payments term						quarterly
Term Loan \| Base Rate
Debt Instrument [Line Items]
Interest rate margin on borrowings				4.00%
Term Loan \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate margin on borrowings				5.00%