BORROWINGS - SMBC Revolving Credit Facility (Details) $ in Thousands, € in Millions		6 Months Ended	12 Months Ended
	Feb. 08, 2024 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Jun. 30, 2025 EUR (€)	Dec. 31, 2024 EUR (€)	Dec. 14, 2023 USD ($)	Apr. 17, 2023 USD ($)	Mar. 06, 2023 USD ($)
Debt Instrument [Line Items]
Borrowings under credit facilities		$ 579,739	$ 594,357
Line of Credit
Debt Instrument [Line Items]
Long-term debt, gross		$ 579,739	$ 594,357
SMBC Credit Facility – March 6, 2023 | Line of Credit
Debt Instrument [Line Items]
Effective interest rate		6.382%	6.535%	6.382%	6.535%
Long-term debt, gross		$ 248,089	$ 137,875
SMBC Credit Facility – March 6, 2023 | Line of Credit | Level 3
Debt Instrument [Line Items]
Long term debt fair value			137,900
SMBC Us Dollar Donominated Borrowings | Line of Credit
Debt Instrument [Line Items]
Effective interest rate		6.691%		6.691%
Borrowings Denominated in Euro Under Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Borrowings under credit facilities		$ 28,200		€ 24.0
Effective interest rate		3.97%		3.97%
Borrowings Denominated in Euro Under Revolving Credit Facility | Line of Credit | Euro Interbank Offered Rate (EURIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.97%
Revolving Credit Facility | Line of Credit | Level 3
Debt Instrument [Line Items]
Long term debt fair value		$ 331,700	456,500
Revolving Credit Facility | SMBC Credit Facility – March 6, 2023
Debt Instrument [Line Items]
Unused facility amount greater than sixty seven percent	0.50%
Unused exceeds of commitment fee percentage	0.375%
Revolving Credit Facility | SMBC Credit Facility – March 6, 2023 | Line of Credit
Debt Instrument [Line Items]
Aggregate principal amount								$ 115,000
Line of credit facility, maximum borrowing capacity								500,000
Revolving Credit Facility | April 2023 Credit Facilities | Line of Credit
Debt Instrument [Line Items]
Aggregate principal amount	$ 265,000					$ 215,000	$ 165,000	$ 115,000
Revolving Credit Facility | April 2023 Credit Facilities | Line of Credit | Regions Bank
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 75,000						$ 50,000
Revolving Credit Facility | December142023 Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 25,000
Revolving Credit Facility | SMBC Us Dollar Donominated Borrowings | Line of Credit
Debt Instrument [Line Items]
Borrowings under credit facilities		$ 219,900	$ 137,900
Revolving Credit Facility | SMBC Us Dollar Donominated Borrowings | Line of Credit | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Revolving Credit Facility | SMBC Us Dollar Donominated Borrowings | Line of Credit | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.00%	4.327%	4.435%
Revolving Credit Facility | SMBC Foreign Currency Denominated Borrowings | Line of Credit | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Revolving Credit Facility | SMBC Foreign Currency Denominated Borrowings | Line of Credit | Foreign Currency Base Rate Equivalent
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.00%
Revolving Credit Facility | SMBC Pound Sterling Denominated Borrowings | Daily Simple Risk Free Rate (RFR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.00%
Revolving Credit Facility | Borrowings Denominated in Euro Under Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Borrowings under credit facilities		$ 107,500	$ 99,000	€ 91.6	€ 95.6
Effective interest rate		4.686%	5.556%	4.686%	5.556%
Revolving Credit Facility | Borrowings Denominated in Euro Under Revolving Credit Facility | Line of Credit | Euro Interbank Offered Rate (EURIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		2.186%	3.056%