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Summary of Long-Term Debt (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Obligations under finance leases	$ 79,331	$ 52,905
2.65% Senior Secured Notes due 2030
Debt Instrument [Line Items]
Debt instruments, maturity date	2030	2030
Senior notes, interest rate	2.65%	2.65%
Unamortized discount	$ 1,968	$ 2,193
1.65% Senior Secured Notes due 2026
Debt Instrument [Line Items]
Debt instruments, maturity date	2026
Senior notes, interest rate	1.65%
Unamortized discount	$ 813
2.65% Senior Secured Notes due 2032
Debt Instrument [Line Items]
Debt instruments, maturity date	2032
Senior notes, interest rate	2.65%
Unamortized discount	$ 1,254
5.00% Senior Secured Notes due 2026
Debt Instrument [Line Items]
Debt instruments, maturity date		2026
Senior notes, interest rate		5.00%
Notes And Mortgages Payable
Debt Instrument [Line Items]
Obligations under finance leases	$ 79,331	$ 52,905
Weighted average interest	5.60%	6.80%
Term Loans With Varying Maturities
Debt Instrument [Line Items]
Debt instruments, maturity date	2099

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Present value of lessee's discounted obligation for lease payments from finance lease.

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