Reconciliation between Federal Statutory Rate and Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	21.00%	21.00%
State taxes, net of federal income tax benefit	2.40%	2.40%	2.50%
Tax effects of foreign operations	(0.70%)	(0.30%)	(0.10%)
Tax benefit from settlement of employee equity awards	0.40%	0.10%	(0.20%)
Other items	0.40%	0.50%	0.30%
Impact of income attributable to noncontrolling interests	0.00%	0.50%	0.10%
Effective tax rate	23.50%	24.20%	23.60%