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Fair Value Measurement - Summary of Assets and Liabilities Categorized Within Fair Value Hierarchy (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 | Dec. 31, 2025
Assets |  |
Debt investments, Fair Value | $ 3,228,940 | $ 3,261,721
Debt investments, Fair Value | 3,231,467 | 3,298,052
Open Forward Foreign Currency Contract, Identifier [Axis]: Foreign Currency Forward Contracts |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | (252)
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | (252)
Open Forward Foreign Currency Contract, Identifier [Axis]: Foreign Currency Forward Contracts Level 1 |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | 0
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | 0
Open Forward Foreign Currency Contract, Identifier [Axis]: Foreign Currency Forward Contracts Level 2 |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | (252)
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | (252)
Open Forward Foreign Currency Contract, Identifier [Axis]: Foreign Currency Forward Contracts Level 3 |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | 0
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | 0
Open Forward Foreign Currency Contract, Identifier [Axis]: Interest Rate Swaps |  |
Assets |  |
Unrealized appreciation (depreciation) | (7,999) | (3,570)
Liabilities |  |
Unrealized Appreciation (Depreciation) | (7,999) | (3,570)
Open Forward Foreign Currency Contract, Identifier [Axis]: Interest Rate Swaps Level 1 |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | 0
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | 0
Open Forward Foreign Currency Contract, Identifier [Axis]: Interest Rate Swaps Level 2 |  |
Assets |  |
Unrealized appreciation (depreciation) | (7,999) | (3,570)
Liabilities |  |
Unrealized Appreciation (Depreciation) | (7,999) | (3,570)
Open Forward Foreign Currency Contract, Identifier [Axis]: Interest Rate Swaps Level 3 |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | 0
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | 0
Open Forward Foreign Currency Contract, Identifier [Axis]: Total Liabilities |  |
Assets |  |
Unrealized appreciation (depreciation) | (7,999) | (3,822)
Liabilities |  |
Unrealized Appreciation (Depreciation) | (7,999) | (3,822)
Open Forward Foreign Currency Contract, Identifier [Axis]: Total Liabilities Level 1 |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | 0
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | 0
Open Forward Foreign Currency Contract, Identifier [Axis]: Total Liabilities Level 2 |  |
Assets |  |
Unrealized appreciation (depreciation) | (7,999) | (3,822)
Liabilities |  |
Unrealized Appreciation (Depreciation) | (7,999) | (3,822)
Open Forward Foreign Currency Contract, Identifier [Axis]: Total Liabilities Level 3 |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | 0
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | 0
1st Lien/Senior Secured Debt |  |
Assets |  |
Debt investments, Fair Value | 3,002,029 | 3,028,788
1st Lien/Last-Out Unitranche |  |
Assets |  |
Debt investments, Fair Value | 130,886 | 135,156
2nd Lien/Senior Secured Debt |  |
Assets |  |
Debt investments, Fair Value | 52,766 | 47,914
Unsecured Debt |  |
Assets |  |
Debt investments, Fair Value | 8,521 | 8,476
Preferred Stock |  |
Assets |  |
Equity, Fair Value | 20,124 | 26,426
Common Stock |  |
Assets |  |
Equity, Fair Value | 14,153 | 14,714
Warrants |  |
Assets |  |
Warrants, Fair Value | 461 | 247
Affiliated Money Market Fund |  |
Assets |  |
Debt investments, Fair Value | 2,476 | 35,724
Interest Rate Swaps |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | 607
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | 607
Foreign Currency Forward Contracts |  |
Assets |  |
Unrealized appreciation (depreciation) | 51 | 0
Liabilities |  |
Unrealized Appreciation (Depreciation) | 51 | 0
Level 1 |  |
Assets |  |
Debt investments, Fair Value | 2,506 | 35,776
Level 1 | 1st Lien/Senior Secured Debt |  |
Assets |  |
Debt investments, Fair Value | 0 | 0
Level 1 | 1st Lien/Last-Out Unitranche |  |
Assets |  |
Debt investments, Fair Value | 0 | 0
Level 1 | 2nd Lien/Senior Secured Debt |  |
Assets |  |
Debt investments, Fair Value | 0 | 0
Level 1 | Unsecured Debt |  |
Assets |  |
Debt investments, Fair Value | 0 | 0
Level 1 | Preferred Stock |  |
Assets |  |
Equity, Fair Value | 0 | 0
Level 1 | Common Stock |  |
Assets |  |
Equity, Fair Value | 30 | 52
Level 1 | Warrants |  |
Assets |  |
Warrants, Fair Value | 0 | 0
Level 1 | Affiliated Money Market Fund |  |
Assets |  |
Debt investments, Fair Value | 2,476 | 35,724
Level 1 | Interest Rate Swaps |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | 0
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | 0
Level 1 | Foreign Currency Forward Contracts |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | 0
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | 0
Level 2 |  |
Assets |  |
Debt investments, Fair Value | 80,547 | 54,749
Level 2 | 1st Lien/Senior Secured Debt |  |
Assets |  |
Debt investments, Fair Value | 80,496 | 54,142
Level 2 | 1st Lien/Last-Out Unitranche |  |
Assets |  |
Debt investments, Fair Value | 0 | 0
Level 2 | 2nd Lien/Senior Secured Debt |  |
Assets |  |
Debt investments, Fair Value | 0 | 0
Level 2 | Unsecured Debt |  |
Assets |  |
Debt investments, Fair Value | 0 | 0
Level 2 | Preferred Stock |  |
Assets |  |
Equity, Fair Value | 0 | 0
Level 2 | Common Stock |  |
Assets |  |
Equity, Fair Value | 0 | 0
Level 2 | Warrants |  |
Assets |  |
Warrants, Fair Value | 0 | 0
Level 2 | Affiliated Money Market Fund |  |
Assets |  |
Debt investments, Fair Value | 0 | 0
Level 2 | Interest Rate Swaps |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | 607
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | 607
Level 2 | Foreign Currency Forward Contracts |  |
Assets |  |
Unrealized appreciation (depreciation) | 51 | 0
Liabilities |  |
Unrealized Appreciation (Depreciation) | 51 | 0
Level 3 |  |
Assets |  |
Debt investments, Fair Value | 3,148,414 | 3,207,527
Debt investments, Fair Value | 3,148,414 | 3,207,527
Level 3 | 1st Lien/Senior Secured Debt |  |
Assets |  |
Debt investments, Fair Value | 2,921,533 | 2,974,646
Level 3 | 1st Lien/Last-Out Unitranche |  |
Assets |  |
Debt investments, Fair Value | 130,886 | 135,156
Level 3 | 2nd Lien/Senior Secured Debt |  |
Assets |  |
Debt investments, Fair Value | 52,766 | 47,914
Level 3 | Unsecured Debt |  |
Assets |  |
Debt investments, Fair Value | 8,521 | 8,476
Level 3 | Preferred Stock |  |
Assets |  |
Equity, Fair Value | 20,124 | 26,426
Level 3 | Common Stock |  |
Assets |  |
Equity, Fair Value | 14,123 | 14,662
Level 3 | Warrants |  |
Assets |  |
Warrants, Fair Value | 461 | 247
Level 3 | Affiliated Money Market Fund |  |
Assets |  |
Debt investments, Fair Value | 0 | 0
Level 3 | Interest Rate Swaps |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | 0
Liabilities |  |
Unrealized Appreciation (Depreciation) | 0 | 0
Level 3 | Foreign Currency Forward Contracts |  |
Assets |  |
Unrealized appreciation (depreciation) | 0 | 0
Liabilities |  |
Unrealized Appreciation (Depreciation) | $ 0 | $ 0

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