Significant Accounting Policies - Summary of Revenue Recognized from Contract Liabilities and Remaining Balance (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	$ 3,990
Payments received in advance of services to be performed	10,367
Revenue recognized for services performed during the period	(9,869)
Foreign Currency Translation	19
Deferred revenues, ending balance	4,507
Information Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	3,121
Payments received in advance of services to be performed	2,666
Revenue recognized for services performed during the period	(2,995)
Foreign Currency Translation	0
Deferred revenues, ending balance	2,792
Post-trade Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	869
Payments received in advance of services to be performed	7,701
Revenue recognized for services performed during the period	(6,874)
Foreign Currency Translation	19
Deferred revenues, ending balance	$ 1,715