Significant Accounting Policies - Summary of Revenue Recognized from Contract Liabilities and Remaining Balance (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	$ 3,990
Payments received in advance of services to be performed	18,250
Revenue recognized for services performed during the period	(17,975)
Foreign Currency Translation	39
Deferred revenues, ending balance	4,304
Information Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	3,121
Payments received in advance of services to be performed	5,891
Revenue recognized for services performed during the period	(6,108)
Foreign Currency Translation	0
Deferred revenues, ending balance	2,904
Post-trade Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	869
Payments received in advance of services to be performed	12,359
Revenue recognized for services performed during the period	(11,867)
Foreign Currency Translation	39
Deferred revenues, ending balance	$ 1,400