v3.24.1.u1
Related-Party Transactions - Management Agreement (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Related-Party Transactions      
Granted (in shares) 3,085,570    
Manager Equity Plan      
Related-Party Transactions      
Granted (in shares) 1,300,000    
Employee Stock      
Related-Party Transactions      
Share-based expense $ 0.3 $ 0.2  
S P T Management L L C      
Related-Party Transactions      
Management fee expense 21.9 21.8  
Base management fee payable 21.9   $ 21.9
Accrued incentive fee 19.1 12.4  
Unpaid incentive fee 19.1   19.5
Executive compensation expense 0.5 $ 1.7  
Unpaid reimbursable compensation $ 3.2   $ 3.4
S P T Management L L C | Restricted Stock Awards      
Related-Party Transactions      
Granted (in shares) 924,092 226,955  
Grant date values $ 18.8 $ 4.3  
Share-based expense $ 1.5 2.2  
S P T Management L L C | Restricted Stock Awards | Manager Equity Plan      
Related-Party Transactions      
Vesting Period 3 years    
S P T Management L L C | Employee Stock      
Related-Party Transactions      
Share-based expense $ 0.0 $ 0.0