Significant Accounting Policies - Summary of Revenue Recognized from Contract Liabilities and Remaining Balance (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($)
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	$ 5,003
Payments received in advance of services to be performed	11,853
Revenue recognized for services performed during the period	(11,944)
Foreign Currency Translation	39
Deferred revenues, ending balance	4,951
Information Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	3,302
Payments received in advance of services to be performed	3,043
Revenue recognized for services performed during the period	(3,713)
Deferred revenues, ending balance	2,632
Post-trade Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	1,286
Payments received in advance of services to be performed	6,877
Revenue recognized for services performed during the period	(6,251)
Foreign Currency Translation	39
Deferred revenues, ending balance	1,951
Technology Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	415
Payments received in advance of services to be performed	1,933
Revenue recognized for services performed during the period	(1,980)
Deferred revenues, ending balance	$ 368