Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Schedule of Diluted Earnings Per Share by Common Class (Detail)

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Earnings Per Share - Schedule of Diluted Earnings Per Share by Common Class (Detail)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2023
units
shares
Mar. 31, 2024
USD ($)
$ / shares
shares
Mar. 31, 2023
USD ($)
$ / shares
shares
Numerator      
Net loss from discontinued operations attributable to holders of Class A Common Stock - basic | $   $ (1,903) $ (15,673)
Reallocation of net loss from discontinued operations assuming exchange of Class A LLC Units | $   0 (12,470)
Net loss from discontinued operations attributable to holders of Class A Common Stock - diluted | $   $ (1,903) $ (28,143)
Denominator      
Weighted average shares of Class A Common Stock outstanding - basic (in shares)   96,485,585 64,016,845
Forward sale share contracts - dilutive shares under the treasury stock method (in shares)   0 2,124,214
Weighted average shares of Class A Common Stock outstanding - diluted (in shares)   96,485,585 190,301,012
Diluted net income (loss) per share      
Continuing operations (in usd per shares) | $ / shares   $ (0.06) $ 0.22
Discontinued operations (in usd per share) | $ / shares   (0.02) (0.15)
Diluted net income (loss) per share (in USD per share) | $ / shares   $ (0.08) $ 0.07
Exchange ratio   1  
Exchange Agreement      
Diluted net income (loss) per share      
Weighted-average anti-dilutive securities excluded from the computation of diluted earnings per share (in shares)   132,947,368  
American Advisors Group (AAG) | Class A LLC Units      
Diluted net income (loss) per share      
Contingent equity consideration, number of types | units 2    
American Advisors Group (AAG) | Class A LLC Units, Equity Classified, Indemnity Holdback      
Diluted net income (loss) per share      
Contingent equity consideration (in shares) 7,142,260    
American Advisors Group (AAG) | Class A LLC Units, Liability Classified      
Diluted net income (loss) per share      
Contingent equity consideration (in shares) 7,058,416    
Common Class A      
Numerator      
Net income (loss) from continuing operations attributable to holders of Class A Common Stock - basic | $   $ (5,635) $ 18,727
Reallocation of net income from continuing operations assuming exchange of Class A LLC Units | $   0 23,328
Net income (loss) from continuing operations attributable to holders of Class A Common Stock - diluted | $   $ (5,635) $ 42,055
Denominator      
Weighted average shares of Class A Common Stock outstanding - basic (in shares)   96,485,585 64,016,845
Assumed exchange of weighted average Class A LLC Units for shares of Class A Common Stock (in shares)   0 124,159,953
Weighted average shares of Class A Common Stock outstanding - diluted (in shares)   96,485,585 190,301,012
Diluted net income (loss) per share      
Diluted net income (loss) per share (in USD per share) | $ / shares   $ (0.08) $ 0.07
Award vesting cost responsibility (in percent)   85.00%