DEBT - Schedule of Debt Obligations (Details) € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands	Mar. 31, 2025 USD ($)	Mar. 31, 2025 EUR (€)	Mar. 31, 2025 CAD ($)	Mar. 31, 2025 GBP (£)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 EUR (€)	Dec. 31, 2024 CAD ($)	Dec. 31, 2024 GBP (£)	Sep. 13, 2022 USD ($)	Feb. 11, 2022 USD ($)
Debt Instrument [Line Items]
Aggregate Principal Committed	$ 3,100,000				$ 2,950,000
Outstanding Principal	2,013,588				1,983,401
Unused Portion	1,084,137				964,770
BNP Funding Facility | Line of Credit
Debt Instrument [Line Items]
Aggregate Principal Committed	600,000				600,000
Outstanding Principal	316,000				316,000
Unused Portion	284,000				284,000
Truist Credit Facility | Line of Credit
Debt Instrument [Line Items]
Aggregate Principal Committed	1,450,000	€ 3,298	$ 300	£ 1,020	1,300,000	€ 3,298	$ 300	£ 1,020
Outstanding Principal	647,588				617,401
Unused Portion	800,137				680,770
Outstanding letters of credit	2,275				1,828
2027 Notes | Senior Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	425,000				425,000					$ 425,000
Outstanding Principal	425,000				425,000
Unused Portion	0				0
Unamortized debt issuance costs	2,097				2,374
Unamortized original issuance discount	399				452
2025 Notes | Senior Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	275,000				275,000				$ 275,000
Outstanding Principal	275,000				275,000
Unused Portion	0				0
Unamortized debt issuance costs	555				856
Unamortized original issuance discount	0				0
2029 Notes | Senior Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	350,000				350,000
Outstanding Principal	350,000				350,000
Unused Portion	0				0
Unamortized debt issuance costs	2,982				3,297
Unamortized original issuance discount	$ 3,207				$ 3,398