Significant Accounting Policies - Summary of Revenue Recognized from Contract Liabilities and Remaining Balance (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	$ 4,539
Payments received in advance of services to be performed	43,597
Revenue recognized for services performed during the period	(43,120)
Foreign Currency Translation	(13)
Deferred revenues, ending balance	5,003
Information Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	3,049
Payments received in advance of services to be performed	14,948
Revenue recognized for services performed during the period	(14,695)
Deferred revenues, ending balance	3,302
Post-trade Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	923
Payments received in advance of services to be performed	20,436
Revenue recognized for services performed during the period	(20,060)
Foreign Currency Translation	(13)
Deferred revenues, ending balance	1,286
Technology Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	567
Payments received in advance of services to be performed	8,213
Revenue recognized for services performed during the period	(8,365)
Deferred revenues, ending balance	$ 415