Income Taxes - Difference Between the Company's Reported Provision for Income Taxes and the U.S. Federal Statutory Rate (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
U.S. federal statutory tax rate, Amount		$ 77,069	$ 75,715	$ 69,867
State and local taxes, net of federal benefit, Amount	[1]	9,505	6,911	2,737
Effect of cross-border tax laws		665	0	0
Tax Credits, Amount		(4,369)	(4,941)	(3,652)
Nontaxable or nondeductible items, Amount		4,400	3,036	2,372
Changes in unrecognized tax benefits, Amount	[1],[2]	26,886	0	0
Provision for income taxes		$ 120,083	$ 86,365	$ 74,645
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. federal statutory tax rate, Percent		21.00%	21.00%	21.00%
State and local taxes, net of federal benefit, Percent	[1]	2.60%	1.90%	0.80%
Effect of cross-border tax laws, Percent		0.20%	0.00%	0.00%
Tax Credits, Percent		(1.20%)	(1.40%)	(1.00%)
Nontaxable or nondeductible items, Percent		1.20%	0.90%	0.70%
Changes in unrecognized tax benefits, Percent	[1],[2]	7.30%	0.00%	0.00%
Effective tax rate, Percent		32.70%	24.00%	22.40%
United Kingdom [Member]
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Foreign Tax Effects, Amount		$ 4,273	$ 4,298	$ 1,935
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Foreign Tax Effects, Percent		1.20%	1.20%	0.50%
Other foreign Jurisdiction [Member]
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Foreign Tax Effects, Amount		$ 1,654	$ 1,346	$ 1,386
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Foreign Tax Effects, Percent		0.40%	0.40%	0.40%

[1] *State taxes in New York State and New York City for the years ended December 31, 2025, 2024 and 2023 made up the majority (greater than 50%) of the tax effect in this category

[2] **The impact in the change in unrecognized tax benefits for the years ended December 31, 2024 and 2023 is immaterial