Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Narrative (Detail)

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Related-Party Transactions - Narrative (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Related Party Transaction [Line Items]          
Selling, general and administrative $ 65,003,000 $ 68,910,000 $ 133,919,000 $ 141,129,000  
Total revenue 158,367,000 162,866,000 287,471,000 317,658,000  
Cost of services 98,081,000 101,163,000 174,949,000 196,590,000  
Operating lease right-of-use assets, net 89,256,000   89,256,000   $ 90,058,000
Accounts payable and accrued expenses 10,036,000   10,036,000   8,126,000
Other assets, current 17,795,000   17,795,000   16,203,000
MMC          
Related Party Transaction [Line Items]          
Operating lease cost 290,000 295,000 581,000 592,000  
Operating lease right-of-use assets, net 7,363,000   7,363,000   7,800,000
Operating lease liability 7,918,000   7,918,000   8,300,000
Related Party          
Related Party Transaction [Line Items]          
Other assets, current 37,000   37,000   63,000
Related Party | MMC          
Related Party Transaction [Line Items]          
Total revenue 290,000 0 1,020,000 441,000  
Accounts receivable 2,100   2,100    
Accounts payable and accrued expenses         $ 10,000
Transition Services Agreement | Related Party | MMC          
Related Party Transaction [Line Items]          
Selling, general and administrative 17,000 19,000 27,000 44,000  
Brokerage And Financing Services | Related Party | MMC          
Related Party Transaction [Line Items]          
Cost of services $ 168,000 $ 0 $ 610,000 $ 264,000  
Chairman And Founder          
Related Party Transaction [Line Items]          
Beneficial ownership percentage     39.00%