Significant Accounting Policies - Summary of Revenue Recognized from Contract Liabilities and Remaining Balance (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	$ 3,990
Payments received in advance of services to be performed	35,831
Revenue recognized for services performed during the period	(35,894)
Foreign Currency Translation	45
Deferred revenues, ending balance	4,539
Information Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	3,121
Payments received in advance of services to be performed	12,715
Revenue recognized for services performed during the period	(12,787)
Deferred revenues, ending balance	3,049
Post-trade Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	869
Payments received in advance of services to be performed	23,116
Revenue recognized for services performed during the period	(23,107)
Foreign Currency Translation	45
Deferred revenues, ending balance	923
Technology Services [Member]
Significant Accounting Policies [Line Items]
Payments received in advance of services to be performed	1,085
Revenue recognized for services performed during the period	(518)
Deferred revenues, ending balance	$ 567