Segment and Geographical Information - Gross Billings, Based on Billing Address of Clients or Client Affiliates (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Revenues From External Customers And Long Lived Assets [Line Items] | |||
| Gross Billings | $ 7,634,567 | $ 6,129,627 | $ 4,168,260 |
| US | |||
| Revenues From External Customers And Long Lived Assets [Line Items] | |||
| Gross Billings | 6,696,743 | 5,286,191 | 3,605,665 |
| International | |||
| Revenues From External Customers And Long Lived Assets [Line Items] | |||
| Gross Billings | $ 937,824 | $ 843,436 | $ 562,595 |