Accrued Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Summary of accrued liabilities
Accrued payroll and other employee related expenses	$ 372,798	$ 400,711
Self-insurance reserves	87,699	79,252
Accrued business taxes	86,985	77,438
Accrued contingent consideration & purchase price adjustments	46,028	5,699
Accrued rebates payable	28,170	51,714
Amounts accrued for repurchases of common stock	27,400	44,447
Accrued interest	24,965	34,327
Other	37,860	45,421
Total accrued liabilities	$ 711,905	$ 739,009