Income Taxes - Reconciliation (Detail)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Taxes
Income tax expense at U.S. federal statutory rate	21.00%	21.00%	21.00%
State and local income taxes, net of federal income tax benefit	4.05%	4.15%	4.16%
Adoption of new accounting standard	2.25%
Federal tax credits	(6.63%)	(3.23%)	(2.81%)
Taxing authority audit settlements and other tax adjustments	(0.95%)	(0.02%)	0.54%
Tax impact of equity-based compensation transactions	(0.61%)	(0.35%)	(0.45%)
Tax impact of impairments	0.42%
Tax impact of impairments reversed		1.87%	0.02%
Tax rate differential on foreign income	0.29%	0.21%	0.27%
Other	0.80%	1.03%	0.51%
Effective income tax rate	20.62%	24.66%	23.24%