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Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accrued Liabilities [Abstract]
Insurance claims and premiums	$ 149,864	$ 147,188
Payroll and payroll-related	141,877	141,371
Interest payable	28,729	29,580
Final capping, closure and post-closure liability - current portion	19,925	19,925
Unrealized cash flow hedge losses	18,675	20,023
Property taxes	8,833	6,381
Cell processing reserve - current portion	3,364	3,344
Transaction-related expenses	3,130	3,304
Environmental remediation reserve - current portion	2,300	2,300
Share-based compensation plan liability - current portion	2,423	868
Other	63,476	30,639
Accrued liabilities	$ 442,596	$ 404,923

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