995200100 - Statement - Consolidated Statements of Assets and Liabilities link:presentationLink link:calculationLink link:definitionLink 995200200 - Statement - Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 995200400 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 995200405 - Statement - Consolidated Statements of Cash Flows - Total cash, cash equivalents and restricted cash link:presentationLink link:calculationLink link:definitionLink 99940408 - Disclosure - INVESTMENTS - Selected Balance Sheet Information For STRS JV (Details) link:presentationLink link:calculationLink link:definitionLink 99940409 - Disclosure - INVESTMENTS - Selected Statement of Operations Information For STRS JV (Details) link:presentationLink link:calculationLink link:definitionLink 99940604 - Disclosure - BORROWINGS - Average stated interest rates and average outstanding balances (Details) link:presentationLink link:calculationLink link:definitionLink 99940702 - Disclosure - RELATED PARTY TRANSACTIONS - Base management fee (Details) link:presentationLink link:calculationLink link:definitionLink 99940703 - Disclosure - RELATED PARTY TRANSACTIONS - Performance-based incentive fee (Details) link:presentationLink link:calculationLink link:definitionLink 99941001 - Disclosure - FINANCIAL HIGHLIGHTS (Details) link:presentationLink link:calculationLink link:definitionLink 99941202 - Disclosure - INCOME TAXES - Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 99941204 - Disclosure - INCOME TAXES - Tax basis components of distributable earnings (Details) link:presentationLink link:calculationLink link:definitionLink 995200090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 995200105 - Statement - Consolidated Statements of Assets and Liabilities (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 995200300 - Statement - Consolidated Statements of Changes in Net Assets link:presentationLink link:calculationLink link:definitionLink 995200500 - Statement - Consolidated Schedule of Investments link:presentationLink link:calculationLink link:definitionLink 00500 - Statement - Consolidated Schedule of Investments Default link:presentationLink link:calculationLink link:definitionLink 99930403 - Disclosure - INVESTMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 99930603 - Disclosure - BORROWINGS (Tables) link:presentationLink link:calculationLink link:definitionLink 99940101 - Disclosure - ORGANIZATION (Details) link:presentationLink link:calculationLink link:definitionLink 99940201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 99940301 - Disclosure - FORWARD CURRENCY CONTRACTS - Forward Currency Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 99940302 - Disclosure - FORWARD CURRENCY CONTRACTS - Unrealized Appreciation or Depreciation On Forward Currency Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 99940303 - Disclosure - FORWARD CURRENCY CONTRACTS - Notional Exposure to Foreign Currency Forward Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 99940304 - Disclosure - FORWARD CURRENCY CONTRACTS - Collateral Received or Pledged (Details) link:presentationLink link:calculationLink link:definitionLink 99940401 - Disclosure - INVESTMENTS - Schedule of Investments (Details) link:presentationLink link:calculationLink link:definitionLink 99940402 - Disclosure - INVESTMENTS - Portfolio by Industry Grouping (Details) link:presentationLink link:calculationLink link:definitionLink 99940403 - Disclosure - INVESTMENTS - Affiliated and Controlled Persons (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - INVESTMENTS - Affiliated and Controlled Persons Default (Details) link:presentationLink link:calculationLink link:definitionLink 99940404 - Disclosure - INVESTMENTS - WHF STRS Ohio Senior Loan Fund LLC (Details) link:presentationLink link:calculationLink link:definitionLink 99940405 - Disclosure - INVESTMENTS - STRS JVs individual Investments (Details) link:presentationLink link:calculationLink link:definitionLink 40405 - Disclosure - INVESTMENTS - STRS JVs individual Investments Default (Details) link:presentationLink link:calculationLink link:definitionLink 99940406 - Disclosure - INVESTMENTS - Superscript (Details) link:presentationLink link:calculationLink link:definitionLink 99940407 - Disclosure - INVESTMENTS - Forward Currency Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 40407 - Disclosure - INVESTMENTS - Forward Currency Contracts Default (Details) link:presentationLink link:calculationLink link:definitionLink 99940501 - Disclosure - FAIR VALUE MEASUREMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 99940502 - Disclosure - FAIR VALUE MEASUREMENTS - Level 3 Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 99940503 - Disclosure - FAIR VALUE MEASUREMENTS - Quantitative information (Details) link:presentationLink link:calculationLink link:definitionLink 99940504 - Disclosure - FAIR VALUE MEASUREMENTS - Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 99940601 - Disclosure - BORROWINGS - Outstanding and Available (Details) link:presentationLink link:calculationLink link:definitionLink 99940602 - Disclosure - BORROWINGS - Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 99940603 - Disclosure - BORROWINGS - 2025 CLO Notes issued in the 2025 CLO Securitization (Details) link:presentationLink link:calculationLink link:definitionLink 99940605 - Disclosure - BORROWINGS - Notes (Details) link:presentationLink link:calculationLink link:definitionLink 99940701 - Disclosure - RELATED PARTY TRANSACTIONS - (Details) link:presentationLink link:calculationLink link:definitionLink 99940704 - Disclosure - RELATED PARTY TRANSACTIONS - Administration , Co-investment and STRS JV (Details) link:presentationLink link:calculationLink link:definitionLink 99940801 - Disclosure - COMMITMENTS AND CONTINGENCIES - Unfunded commitments (Details) link:presentationLink link:calculationLink link:definitionLink 99940802 - Disclosure - COMMITMENTS AND CONTINGENCIES - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 99940901 - Disclosure - STOCKHOLDERS' EQUITY (Details) link:presentationLink link:calculationLink link:definitionLink 99941401 - Disclosure - SUBSEQUENT EVENTS - (Details) link:presentationLink link:calculationLink link:definitionLink 995210101 - Disclosure - ORGANIZATION link:presentationLink link:calculationLink link:definitionLink 995210201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 995210301 - Disclosure - FORWARD CURRENCY CONTRACTS link:presentationLink link:calculationLink link:definitionLink 995210401 - Disclosure - INVESTMENTS link:presentationLink link:calculationLink link:definitionLink 995210501 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 995210601 - Disclosure - BORROWINGS link:presentationLink link:calculationLink link:definitionLink 995210701 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 995210801 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 995210901 - Disclosure - STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 995211001 - Disclosure - FINANCIAL HIGHLIGHTS link:presentationLink link:calculationLink link:definitionLink 995211101 - Disclosure - CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE link:presentationLink link:calculationLink link:definitionLink 995211201 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 995211301 - Disclosure - SEGMENT REPORTING link:presentationLink link:calculationLink link:definitionLink 995211401 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 99920202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 99930303 - Disclosure - FORWARD CURRENCY CONTRACTS (Tables) link:presentationLink link:calculationLink link:definitionLink 99930503 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 99930703 - Disclosure - RELATED PARTY TRANSACTIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 99930803 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 99930903 - Disclosure - STOCKHOLDER'S EQUITY (Tables) link:presentationLink link:calculationLink link:definitionLink 99931003 - Disclosure - FINANCIAL HIGHLIGHTS (Tables) link:presentationLink link:calculationLink link:definitionLink 99931103 - Disclosure - CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 99931203 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 99940902 - Disclosure - STOCKHOLDERS' EQUITY (Details) link:presentationLink link:calculationLink link:definitionLink 99941101 - Disclosure - CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 99941201 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 99941203 - Disclosure - INCOME TAXES - Distribution (Details) link:presentationLink link:calculationLink link:definitionLink 99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink