Operating Segment Information - Summary of Company's Revenue by Geographical Region (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Revenue [Abstract]
Revenue	$ 1,009,172	$ 802,678	$ 2,813,241	$ 2,312,262
United States
Revenue [Abstract]
Revenue	984,476	781,966	2,739,661	2,254,653
Other International Countries
Revenue [Abstract]
Revenue	$ 24,696	$ 20,712	$ 73,580	$ 57,609

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details