Borrowings - Schedule of Company's Outstanding Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Nov. 21, 2024	Sep. 15, 2023	Apr. 07, 2022
Borrowings
Total aggregate principal amount committed/ outstanding	$ 2,983,131	$ 2,656,207
Principal Amount Outstanding	2,743,571	2,151,713
Carrying Value	2,721,639	2,128,362
Unamortized Debt Issuance Costs	21,932	23,351
Revolving Credit Facility
Borrowings
Total aggregate principal amount committed/ outstanding	707,500	652,500
Principal Amount Outstanding	629,540	481,106
Carrying Value	623,715	474,756
Unamortized Debt Issuance Costs	5,825	6,350
SPV Credit Facility
Borrowings
Total aggregate principal amount committed/ outstanding	450,000	450,000
Principal Amount Outstanding	306,800	243,300
Carrying Value	303,867	239,889
Unamortized Debt Issuance Costs	2,933	3,411
SPV II Credit Facility
Borrowings
Total aggregate principal amount committed/ outstanding	164,294	195,998
Principal Amount Outstanding	164,294	195,998
Carrying Value	163,598	194,574
Unamortized Debt Issuance Costs	696	1,424
SPV III Credit Facility
Borrowings
Total aggregate principal amount committed/ outstanding	200,000	100,000
Principal Amount Outstanding	200,000	75,000
Carrying Value	198,283	73,722
Unamortized Debt Issuance Costs	1,717	1,278
SPV IV Credit Facility
Borrowings
Total aggregate principal amount committed/ outstanding	350,000	350,000
Principal Amount Outstanding	350,000	248,600
Carrying Value	347,065	245,185
Unamortized Debt Issuance Costs	2,935	3,415
SPV V Credit Facility
Borrowings
Total aggregate principal amount committed/ outstanding	250,000
Principal Amount Outstanding	231,600
Carrying Value	229,185	0
Unamortized Debt Issuance Costs	2,415
2022 ABS
Borrowings
Total aggregate principal amount committed/ outstanding	248,237	294,609			$ 425,000
Principal Amount Outstanding	248,237	294,609
Carrying Value	248,237	293,393
Unamortized Debt Issuance Costs	0	1,216
2022 Class C Notes
Borrowings
Carrying Value	29,306	34,780
2022 Subordinated Notes
Borrowings
Carrying Value	82,875	82,875
2023 ABS
Borrowings
Total aggregate principal amount committed/ outstanding	209,100	209,100		$ 251,169
Principal Amount Outstanding	209,100	209,100
Carrying Value	206,799	206,369
Unamortized Debt Issuance Costs	2,301	2,731
2028 Notes
Borrowings
Total aggregate principal amount committed/ outstanding	200,000	200,000
Principal Amount Outstanding	200,000	200,000
Carrying Value	198,411	198,178
Unamortized Debt Issuance Costs	1,589	1,822
2029 Notes
Borrowings
Total aggregate principal amount committed/ outstanding	204,000	204,000
Principal Amount Outstanding	204,000	204,000
Carrying Value	202,479	202,296
Unamortized Debt Issuance Costs	1,521	1,704
2023 Subordinated Notes
Borrowings
Total aggregate principal amount committed/ outstanding			$ 45,900	$ 65,319
Carrying Value	$ 45,900	$ 45,900