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Line of Credit, Long-Term Debt and Finance Lease Obligations - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Mar. 25, 2020	Sep. 30, 2021	Dec. 31, 2021	Feb. 11, 2022	Dec. 31, 2020	Dec. 31, 2019	Feb. 28, 2019	Nov. 30, 2018	Dec. 31, 2015
Debt Instrument [Line Items]
Debt instrument maturity date description			payable semi-annually in arrears on January 15 and July 15
Long term debt			$ 989,700		$ 1,700,000
Line of Credit facility, available balance			599,900
Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Decrease in unsecured revolving credit facility		$ 600,000
Line of Credit facility, current borrowing capacity				$ 450,000
Letters of Credit [Member]
Debt Instrument [Line Items]
Letters of credit outstanding amount			$ 100
5.25% Senior Unsecured Notes Due 2023 [Member]
Debt Instrument [Line Items]
Aggregate principal amount of debt									$ 750,000
Debt instrument, maturity year			2023
6.25% Senior Unsecured Notes Due 2027 [Member]
Debt Instrument [Line Items]
Aggregate principal amount of debt							$ 500,000	$ 500,000
Debt instrument interest rate								6.25%
Debt instrument, maturity year			2027
Long term debt			$ 1,000		$ 1,000	$ 1,000
Interest accrued periodically			$ 62,500
Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit facility, borrowing capacity	$ 300,000
Estimated EBITDA	$ 139,200
Credit Agreement [Member] | Forecast For First Quarter Of 2021 [Member]
Debt Instrument [Line Items]
Leverage ratio	2020
Credit Agreement [Member] | Forecast For Fourth Quarter Of 2020 [Member]
Debt Instrument [Line Items]
Leverage ratio	4.75:1:00
Credit Agreement [Member] | Minimum [Member]
Debt Instrument [Line Items]
Leverage ratio	4.50:1:00
Credit Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio	5.00:1:00

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Contractual interest rate for funds borrowed, under the debt agreement.

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