Income Taxes - Reconciliation of the Statutory Federal Income Tax Rate to the Effective Tax Rate (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of the statutory federal income tax rate to the effective tax rate
Statutory federal income tax rate	21.00%	21.00%	21.00%
Effect of:
State and local income taxes	2.80%	2.20%	2.50%
Investment vehicles	(0.40%)	(0.80%)	(0.80%)
Employee share-based payments	(1.40%)	(4.80%)	(3.80%)
Research and development credits	(0.60%)	(0.60%)	(0.50%)
Amended returns and refunds	0.40%	0.20%	0.30%
Other - net	(0.30%)	(0.10%)	0.70%
Reported effective tax rate	21.50%	17.10%	19.40%