Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Summary of accrued liabilities
Accrued payroll and other employee related expenses	$ 290,582	$ 400,711
Self-insurance reserves	83,861	79,252
Accrued business taxes	69,199	77,438
Amounts accrued for repurchases of common stock	12,762	44,447
Accrued rebates payable	27,236	51,714
Accrued interest	39,101	34,327
Accrued contingent consideration & purchase price adjustments	38,150	5,699
Other	38,732	45,421
Total accrued liabilities	$ 599,623	$ 739,009