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Segment and Geographic Information (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
businessActivity
segment
Sep. 30, 2022
Revenues From External Customers And Long Lived Assets [Line Items]        
Number of business activity | businessActivity     1  
Number of reportable segments     1  
Number of operating segments     1  
Gross billings 100.00% 100.00% 100.00% 100.00%
U.S.        
Revenues From External Customers And Long Lived Assets [Line Items]        
Gross billings 87.00% 89.00% 88.00% 88.00%
International        
Revenues From External Customers And Long Lived Assets [Line Items]        
Gross billings 13.00% 11.00% 12.00% 12.00%