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Investments (Details) € in Thousands, $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2023 EUR (€)
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | $ 3,158,601 |  | $ 2,939,646 | [1] | $ 2,373,435 |  |  |
Fair Value |  | 3,123,450 |  | 2,873,588 |  | 2,387,374 |  |  |
Amortized cost of investments on non-accrual |  | $ 8,848 |  | 1,500 |  |  |  |  |
Investment Owned at Fair Value |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  |  |  | 2,939,646 |  | 2,373,435 |  |  |
Fair Value |  |  |  | $ 2,873,588 |  | $ 2,387,374 |  |  |
Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 100.00% |  | 100.00% |  | 100.00% |  |  |
Australia |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | $ 10,151 |  | $ 10,187 |  |  |  |  |
Fair Value |  | $ 10,168 |  | $ 9,870 |  |  |  |  |
Australia | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 0.30% |  | 0.30% |  |  |  |  |
Canada |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | $ 97,187 |  | $ 108,820 |  | $ 81,935 |  |  |
Fair Value |  | $ 96,518 |  | $ 105,764 |  | $ 81,386 |  |  |
Canada | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 3.10% |  | 3.70% |  | 3.40% |  |  |
United Kingdom |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | $ 11,848 |  | $ 11,157 |  | $ 17,804 |  |  |
Fair Value |  | $ 12,088 |  | $ 11,157 |  | $ 18,200 |  |  |
United Kingdom | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 0.40% |  | 0.40% |  | 0.80% |  |  |
United States |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | $ 3,039,415 |  | $ 2,809,482 |  | $ 2,273,696 |  |  |
Fair Value |  | $ 3,004,676 |  | $ 2,746,797 |  | $ 2,287,788 |  |  |
United States | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 96.20% |  | 95.60% |  | 95.80% |  |  |
Aerospace & Defense | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 1.70% |  | 1.80% |  | 1.70% |  |  |
Air Freight & Logistics | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 1.10% |  | 1.10% |  | 0.50% |  |  |
Automobile Components | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 3.60% |  | 3.80% |  | 3.30% |  |  |
Automobiles | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 4.90% |  | 5.10% |  | 7.40% |  |  |
Biotechnology | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 0.50% |  | 0.50% |  | 0.60% |  |  |
Chemicals | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 0.70% |  | 0.60% |  |  |  |  |
Containers & Packaging | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 1.50% |  | 1.60% |  | 1.60% |  |  |
Commercial Services & Supplies | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 10.30% |  | 11.20% |  | 13.00% |  |  |
Construction & Engineering | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 1.50% |  | 1.30% |  | 1.50% |  |  |
Distributors | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 2.80% |  | 4.20% |  | 1.20% |  |  |
Diversified Consumer Services | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 3.30% |  | 3.00% |  | 1.50% |  |  |
Electronic Equipment, Instruments & Components | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 1.50% |  | 1.00% |  | 0.70% |  |  |
Energy Equipment & Services | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 0.50% |  | 0.50% |  | 0.60% |  |  |
Financial Services | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 1.70% |  | 0.70% |  | 0.10% |  |  |
Food Products | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 2.30% |  | 2.50% |  | 3.10% |  |  |
Health Care Equipment & Supplies |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost | [2] | $ 5,415 |  |  |  |  |  |  |
Fair Value |  | $ 5,374 |  |  |  |  |  |  |
Health Care Equipment & Supplies | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 0.40% |  | 0.30% |  | 0.40% |  |  |
Health Care Providers & Services | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 3.80% |  | 3.40% |  | 2.90% |  |  |
Health Care Technology | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 2.00% |  | 0.70% |  | 0.90% |  |  |
Industrial Conglomerates | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 1.30% |  | 0.20% |  | 1.80% |  |  |
Insurance Services | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 14.90% |  | 15.70% |  | 17.10% |  |  |
Interactive Media & Services | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 3.20% |  | 3.50% |  | 3.80% |  |  |
IT Services | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 8.80% |  | 9.60% |  | 10.80% |  |  |
Leisure Products | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 0.70% |  | 0.80% |  | 2.40% |  |  |
Machinery | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 2.70% |  | 3.00% |  | 2.00% |  |  |
Multi-Utilities | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 0.70% |  | 0.60% |  | 0.40% |  |  |
Oil, Gas & Consumable Fuels | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 0.00% |  | 0.00% |  |  |  |  |
Pharmaceuticals | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 0.40% |  | 0.40% |  |  |  |  |
Professional Services | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 3.60% |  | 3.20% |  | 4.00% |  |  |
Real Estate Management & Development | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 5.30% |  | 5.40% |  | 5.20% |  |  |
Software | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 14.30% |  | 14.30% |  | 11.50% |  |  |
First Lien Debt |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | $ 2,960,107 |  | $ 2,753,620 |  | $ 2,213,332 | [1] | € 2,960,107 | [2]
Fair Value |  | $ 2,933,870 |  | $ 2,694,111 |  | $ 2,224,100 |  | 2,933,870 |
First Lien Debt | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 93.90% |  | 93.80% |  | 93.20% |  |  |
First Lien Debt | Aerospace & Defense |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | $ 52,573 | [2] | $ 52,520 | [2] | $ 38,993 | [1] |  |
Fair Value |  | 52,676 |  | 51,531 |  | 39,370 |  |  |
First Lien Debt | Air Freight & Logistics |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 29,679 | [2] | 28,736 | [2] | 11,948 | [1] |  |
Fair Value |  | 29,888 |  | 27,943 |  | 11,948 |  |  |
First Lien Debt | Automobile Components |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 86,866 | [2] | 86,480 | [2] | 51,698 | [1] |  |
Fair Value |  | 86,506 |  | 83,574 |  | 51,746 |  |  |
First Lien Debt | Automobiles |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 154,223 |  | 150,144 | [3] | 174,783 | [1] |  |
Fair Value |  | 154,132 |  | 146,413 |  | 175,583 |  |  |
First Lien Debt | Biotechnology |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 15,611 |  | 14,830 | [3] | 14,955 | [1] |  |
Fair Value |  | 15,603 |  | 14,407 |  | 14,955 |  |  |
First Lien Debt | Chemicals |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 21,087 |  | 18,797 | [3] |  |  |  |
Fair Value |  | 20,783 |  | 18,066 |  |  |  |  |
First Lien Debt | Containers & Packaging |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 43,385 |  | 43,852 | [3] | 36,043 | [1] |  |
Fair Value |  | 43,525 |  | 42,522 |  | 36,043 |  |  |
First Lien Debt | Commercial Services & Supplies |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 320,119 |  | 325,020 | [1],[2] | 306,205 | [1] |  |
Fair Value |  | 319,668 |  | 319,508 |  | 307,450 |  |  |
First Lien Debt | Construction & Engineering |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 45,942 |  | 37,932 | [3] | 35,799 | [1] |  |
Fair Value |  | 45,890 |  | 36,734 |  | 35,799 |  |  |
First Lien Debt | Distributors |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 90,110 |  | 122,968 | [3] | 28,636 | [1] |  |
Fair Value |  | 87,337 |  | 120,982 |  | 28,636 |  |  |
First Lien Debt | Diversified Consumer Services |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 103,850 |  | 88,142 | [3] | 36,642 | [1] |  |
Fair Value |  | 103,167 |  | 87,147 |  | 36,975 |  |  |
First Lien Debt | Electronic Equipment, Instruments & Components |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 26,500 |  | 13,448 | [3] |  |  |  |
Fair Value |  | 25,815 |  | 12,892 |  |  |  |  |
First Lien Debt | Financial Services |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 53,913 |  | 19,820 | [3] | 71,968 | [1] |  |
Fair Value |  | 54,126 |  | 19,586 |  | 72,070 |  |  |
First Lien Debt | Health Care Equipment & Supplies |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 13,052 |  |  |  | 62,269 | [1] |  |
Fair Value |  | 13,090 |  |  |  | 62,602 |  |  |
First Lien Debt | Health Care Providers & Services |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 111,559 |  | 90,686 |  |  |  |  |
Fair Value |  | 110,086 |  | 88,460 |  |  |  |  |
First Lien Debt | Health Care Technology |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 61,214 |  | 21,467 |  | 21,562 | [1] |  |
Fair Value |  | 61,389 |  | 21,148 |  | 20,963 |  |  |
First Lien Debt | Industrial Conglomerates |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 33,628 |  | 1,666 | [1] | 35,958 |  |  |
Fair Value |  | 34,407 |  | 1,612 |  | 36,285 |  |  |
First Lien Debt | Insurance Services |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 466,713 |  | 455,293 |  | 401,473 |  |  |
Fair Value |  | 460,888 |  | 446,804 |  | 403,895 |  |  |
First Lien Debt | Interactive Media & Services |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 104,614 |  | 103,429 |  | 90,189 |  |  |
Fair Value |  | 100,966 |  | 101,077 |  | 91,025 |  |  |
First Lien Debt | IT Services |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 227,038 |  | 230,561 |  | 201,890 |  |  |
Fair Value |  | 220,202 |  | 223,366 |  | 202,960 |  |  |
First Lien Debt | Leisure Products |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 21,596 |  | 21,726 |  | 54,292 | [1] |  |
Fair Value |  | 21,214 |  | 21,557 |  | 54,900 |  |  |
First Lien Debt | Machinery |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 84,669 |  | 88,999 |  | 48,582 | [1] |  |
Fair Value |  | 83,742 |  | 85,464 |  | 48,133 |  |  |
First Lien Debt | Multi-Utilities |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 21,738 |  | 16,427 | [1] | 10,405 | [1] |  |
Fair Value |  | 21,760 |  | 16,228 |  | 10,600 |  |  |
First Lien Debt | Oil, Gas & Consumable Fuels |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost | [1] |  |  | 399 |  |  |  |  |
Fair Value |  |  |  | 390 |  |  |  |  |
First Lien Debt | Pharmaceuticals |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 11,848 |  | 11,157 | [1] |  |  |  |
Fair Value |  | 12,088 |  | 11,157 |  |  |  |  |
First Lien Debt | Professional Services |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 110,638 |  | 89,714 | [1] | 91,547 | [1] |  |
Fair Value |  | 110,995 |  | 88,770 |  | 92,207 |  |  |
First Lien Debt | Real Estate Management & Development |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 163,130 | [2] | 155,654 | [2] | 121,237 |  |  |
Fair Value |  | 162,420 |  | 152,029 |  | 122,965 |  |  |
First Lien Debt | Software |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  |  |  | 381,883 |  | 252,416 | [1] | 412,722 | [2]
Fair Value |  |  |  | 374,792 |  | 252,952 |  | € 410,701 |
Second Lien Debt |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 145,809 | [2] | 136,620 | [1] | 120,124 |  |  |
Fair Value |  | $ 134,712 |  | $ 128,350 |  | $ 121,550 |  |  |
Second Lien Debt | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 4.30% |  | 4.50% |  | 5.10% |  |  |
Second Lien Debt | Electronic Equipment, Instruments & Components |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  |  |  | $ 16,939 |  | $ 16,912 | [1] |  |
Fair Value |  |  |  | 16,194 |  | 17,000 |  |  |
Second Lien Debt | Health Care Providers & Services |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  |  |  | 5,318 |  |  |  |  |
Fair Value |  |  |  | 4,946 |  |  |  |  |
Second Lien Debt | Industrial Conglomerates |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost | [1] |  |  |  |  | 39,944 |  |  |
Fair Value |  |  |  |  |  | 40,387 |  |  |
Second Lien Debt | IT Services |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | $ 40,072 | [2] | 40,016 | [1] |  |  |  |
Fair Value |  | 37,804 |  | 37,735 |  |  |  |  |
Second Lien Debt | Software |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 23,801 | [2] | 23,770 | [1] | 120,124 | [1] |  |
Fair Value |  | 19,963 |  | 22,341 |  | 121,550 |  |  |
Other Securities |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
Cost |  | 52,685 | [2] | 49,406 | [1] | 39,979 |  |  |
Fair Value |  | $ 54,868 |  | $ 51,127 |  | $ 41,724 |  |  |
Other Securities | Investment Owned at Fair Value | Investment Type Concentration Risk |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |
% of Total Investments at Fair Value |  | 1.80% |  | 1.70% |  | 1.70% |  |  |
[1] | The cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method.
[2] | The cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method.
[3] | The cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method.

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