Debt - Schedule of Maturity of Contractual Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Total	$ 2,402,054	$ 2,836,315
Less than 1 year	175,000
1-3 years	100,000
3-5 years	1,045,554
After 5 years	1,081,500
Revolving Credit Facility \| Line of credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Total	301,304	294,565
Less than 1 year	0
1-3 years	0
3-5 years	301,304
After 5 years	0
SPV Asset Facility I \| Line of credit
Debt Instrument [Line Items]
Total	474,000	497,000
Less than 1 year	0
1-3 years	0
3-5 years	474,000
After 5 years	0
SPV Asset Facility II \| Line of credit
Debt Instrument [Line Items]
Total	270,250
Less than 1 year	0
1-3 years	0
3-5 years	270,250
After 5 years	0
SPV Asset Facility III \| Line of credit
Debt Instrument [Line Items]
Total	350,000	550,000
Less than 1 year	0
1-3 years	0
3-5 years	0
After 5 years	350,000
SPV Asset Facility IV \| Line of credit
Debt Instrument [Line Items]
Total	461,500	629,500
Less than 1 year	0
1-3 years	0
3-5 years	0
After 5 years	461,500
Athena CLO III \| Line of credit
Debt Instrument [Line Items]
Total	270,000	270,000
Athena CLO III \| Secured debt
Debt Instrument [Line Items]
Total	270,000
Less than 1 year	0
1-3 years	0
3-5 years	0
After 5 years	270,000
Series 2023A Notes \| Line of credit
Debt Instrument [Line Items]
Total	100,000	$ 100,000
Series 2023A Notes \| Unsecured debt investments
Debt Instrument [Line Items]
Total	100,000
Less than 1 year	100,000
1-3 years	0
3-5 years	0
After 5 years	0
Series 2023B-A Notes \| Unsecured debt investments
Debt Instrument [Line Items]
Total	100,000
Less than 1 year	0
1-3 years	100,000
3-5 years	0
After 5 years	0
Series 2023B-B Notes \| Unsecured debt investments
Debt Instrument [Line Items]
Total	75,000
Less than 1 year	75,000
1-3 years	0
3-5 years	0
After 5 years	$ 0