Income Taxes - Principal Reasons for the Difference Between the Effective Tax Rate and UBT Statutory Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Amount [Abstract]
UBT statutory rate	$ 50,345	$ 32,707	$ 32,604
Corporate subsidiaries' federal, state, and local	2,236	4,538	1,460
Foreign subsidiaries taxed at different rates	42,384	36,788	32,664
FIN 48 reserve (release)	0	(2,838)	0
UBT business allocation percentage rate change	(634)	(1,049)	(98)
Deferred tax and payable write-offs	911	1,750	1,089
Foreign outside basis difference	126	3,414	(1,535)
Valuation allowance reserve (release)	(16)	(22,447)	0
Effect of ASC 740 adjustments, miscellaneous taxes, and other	3,474	3,553	5,366
Tax Credits	(29)	(1,604)	(5,275)
Income not taxable resulting from use of UBT business apportionment factors and effect of compensation charge	(33,654)	(25,761)	(26,636)
Income tax expense	$ 65,143	$ 29,051	$ 39,639
Effective Income Tax Rate Reconciliation, Percent [Abstract]
UBT statutory rate,percent	4.00%	4.00%	4.00%
Corporate subsidiaries' federal, state, and local, percent	0.20%	0.60%	0.20%
Foreign subsidiaries taxed at different rates, percent	3.40%	4.50%	4.00%
FIN 48 reserve (release), percent	0.00%	(0.30%)	0.00%
UBT business allocation percentage rate change, percent	(0.10%)	(0.10%)	0.00%
Deferred tax and payable write-offs, percent	0.10%	0.20%	0.10%
Foreign outside basis difference, percent	0.00%	0.40%	(0.20%)
Valuation allowance reserve (release), percent	0.00%	(2.70%)	0.00%
Effect of ASC 740 adjustments, miscellaneous taxes, and other, percent	0.30%	0.40%	0.70%
Tax credit, percent	0.00%	(0.20%)	(0.60%)
Income not taxable resulting from use of UBT business apportionment factors and effect of compensation charge, percent	(2.70%)	(3.20%)	(3.30%)
Effective tax rate, percent	5.20%	3.60%	4.90%