Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - Additional Information (Detail)

v3.24.0.1
Related Party Transactions - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Related Party Transaction [Line Items]                      
Income from fees $ 28,542 $ 29,704 $ 29,734 $ 29,430 $ 28,492 $ 29,042 $ 32,173 $ 33,510 $ 117,410 $ 123,217 $ 131,603
Receivable from partners 9,526       9,118       9,526 9,118  
Management and Advisory Fees                      
Related Party Transaction [Line Items]                      
Income from fees                 112,794 118,725 126,976
Affiliated Entity                      
Related Party Transaction [Line Items]                      
Other receivables $ 558       $ 577       $ 558 $ 577  
Other Receivable, after Allowance for Credit Loss, Related Party, Type [Extensible Enumeration] us-gaap:RelatedPartyMember       us-gaap:RelatedPartyMember       us-gaap:RelatedPartyMember us-gaap:RelatedPartyMember  
Receivable from partners $ 387       $ 102       $ 387 $ 102  
Accounts Receivable, after Allowance for Credit Loss, Related Party, Type [Extensible Enumeration] us-gaap:RelatedPartyMember       us-gaap:RelatedPartyMember       us-gaap:RelatedPartyMember us-gaap:RelatedPartyMember  
Affiliated Entity | Equity Income from Investments                      
Related Party Transaction [Line Items]                      
Income from performance fees and allocations                 $ 0 $ 0 1,407
Affiliated Entity | Management Fees                      
Related Party Transaction [Line Items]                      
Income from fees                 4,068 4,413 4,711
Affiliated Entity | Management and Advisory Fees                      
Related Party Transaction [Line Items]                      
Income from fees                 $ 1,652 $ 1,689 $ 1,706
Affiliated Entity | Minimum                      
Related Party Transaction [Line Items]                      
Management and advisory fees percentage                 0.00%    
Percentage of performance fees                 0.00%    
Affiliated Entity | Maximum                      
Related Party Transaction [Line Items]                      
Management and advisory fees percentage                 1.75%    
Percentage of performance fees                 10.00%