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Borrowings - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Debt Disclosure [Abstract]          
Interest expense $ 43.5   $ 43.5   $ 38.7
Unused commitment fees $ 0.8   $ 0.8   $ 1.2
Weighted average interest rate 5.26% 4.84% 5.18% 4.80%  
Weighted average interest rate all-in 5.38% 4.96% 5.31% 4.91%  
Average principal debt outstanding $ 5,798.8 $ 5,377.6 $ 5,422.5 $ 5,497.8