Corporate Investments and Funds Held for Clients - Summary of Unrealized Losses and Fair Values of Available-for-Sale Securities that have been in Unrealized Loss Position for Period of Less than and Greater than 12 Months (Details) - Available-for-sale Securities [Member] - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Corporate Investments And Funds Held For Clients [Line Items]
Securities in unrealized loss position for less than 12 months, Gross unrealized losses		$ (4,757)
Securities in unrealized loss position for less than 12 months, Fair value		169,610
Securities in unrealized loss position for greater than 12 months, Gross unrealized losses	$ (1,256)
Securities in unrealized loss position for greater than 12 months, Fair value	173,631
Gross unrealized losses	(1,256)	(4,757)
Fair value	173,631	169,610
U.S. Treasury Securities [Member]
Corporate Investments And Funds Held For Clients [Line Items]
Securities in unrealized loss position for less than 12 months, Gross unrealized losses		(4,757)
Securities in unrealized loss position for less than 12 months, Fair value		169,610
Securities in unrealized loss position for greater than 12 months, Gross unrealized losses	(1,256)
Securities in unrealized loss position for greater than 12 months, Fair value	173,631
Gross unrealized losses	(1,256)	(4,757)
Fair value	$ 173,631	$ 169,610