v3.26.1
Investments - Summary of Portfolio Investments By Industry Grouping At Amortized Cost And The Fair Value (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]            
Amortized Cost $ 872,800 [1],[2],[3]   $ 872,800 [1],[2],[3]   $ 874,196 [4],[5],[6],[7]  
Amortized Cost Percentage 100.00%   100.00%   100.00%  
Fair Value $ 836,632 [1],[3]   $ 836,632 [1],[3]   $ 849,354 [4],[5],[7]  
Fair Value Percentage 100.00%   100.00%   100.00%  
Controlled Affiliated Investments            
Schedule of Investments [Line Items]            
Amortized Cost $ 183,377 [1],[2],[3],[8]   $ 183,377 [1],[2],[3],[8]   $ 177,962 [4],[5],[6],[7]  
Fair Value 171,854 [1],[3],[8]   171,854 [1],[3],[8]   165,702 [4],[5],[7]  
Interest income 5,143 $ 5,351 10,254 $ 10,884    
Senior Direct Lending Program            
Schedule of Investments [Line Items]            
Amortized Cost 4,465,856   4,465,856   4,304,749  
Fair Value 4,309,053 [9]   4,309,053 [9]   4,158,859 [10]  
Senior Direct Lending Program | Controlled Affiliated Investments | Subordinated Certificates Of SDLP            
Schedule of Investments [Line Items]            
Fair Value 171,854 154,329 171,854 154,329 165,702 $ 172,152
Purchases of Investments 13,515 7,559 13,515 7,559    
Payment-in-kind and other adjustments to cost 168 (1,041) 168 (1,041)    
Repayments of investments (8,268) (18,807) (8,268) (18,807)    
Unrealized Appreciation / (Depreciation) 737 $ (5,534) 737 (5,534)    
Interest income     10,254 $ 10,884    
Investment Funds and Vehicles            
Schedule of Investments [Line Items]            
Amortized Cost $ 183,377 [11]   $ 183,377 [11]   $ 177,962 [12]  
Amortized Cost Percentage 21.00% [11]   21.00% [11]   20.40% [12]  
Fair Value $ 171,854 [11]   $ 171,854 [11]   $ 165,702 [12]  
Fair Value Percentage 20.50% [11]   20.50% [11]   19.50% [12]  
Health Care Providers & Services            
Schedule of Investments [Line Items]            
Amortized Cost $ 117,613   $ 117,613   $ 126,802  
Amortized Cost Percentage 13.50%   13.50%   14.50%  
Fair Value $ 115,487   $ 115,487   $ 126,064  
Fair Value Percentage 13.80%   13.80%   14.80%  
Professional Services            
Schedule of Investments [Line Items]            
Amortized Cost $ 53,076   $ 53,076   $ 48,174  
Amortized Cost Percentage 6.10%   6.10%   5.50%  
Fair Value $ 53,203   $ 53,203   $ 48,356  
Fair Value Percentage 6.40%   6.40%   5.70%  
Automobile Components            
Schedule of Investments [Line Items]            
Amortized Cost $ 50,039   $ 50,039   $ 41,694  
Amortized Cost Percentage 5.70%   5.70%   4.80%  
Fair Value $ 46,010   $ 46,010   $ 38,527  
Fair Value Percentage 5.50%   5.50%   4.50%  
Health Care Equipment & Supplies            
Schedule of Investments [Line Items]            
Amortized Cost $ 44,909   $ 44,909   $ 45,936  
Amortized Cost Percentage 5.10%   5.10%   5.30%  
Fair Value $ 44,858   $ 44,858   $ 45,845  
Fair Value Percentage 5.40%   5.40%   5.40%  
Commercial Services & Supplies            
Schedule of Investments [Line Items]            
Amortized Cost $ 44,213   $ 44,213   $ 47,059  
Amortized Cost Percentage 5.10%   5.10%   5.40%  
Fair Value $ 43,501   $ 43,501   $ 47,429  
Fair Value Percentage 5.20%   5.20%   5.60%  
IT Services            
Schedule of Investments [Line Items]            
Amortized Cost $ 33,918   $ 33,918   $ 37,766  
Amortized Cost Percentage 3.90%   3.90%   4.30%  
Fair Value $ 31,899   $ 31,899   $ 37,656  
Fair Value Percentage 3.80%   3.80%   4.40%  
Chemicals            
Schedule of Investments [Line Items]            
Amortized Cost $ 29,108   $ 29,108   $ 29,148  
Amortized Cost Percentage 3.30%   3.30%   3.30%  
Fair Value $ 29,629   $ 29,629   $ 29,363  
Fair Value Percentage 3.50%   3.50%   3.50%  
Health Care Technology            
Schedule of Investments [Line Items]            
Amortized Cost $ 24,635   $ 24,635   $ 30,658  
Amortized Cost Percentage 2.80%   2.80%   3.50%  
Fair Value $ 24,227   $ 24,227   $ 30,255  
Fair Value Percentage 2.90%   2.90%   3.60%  
Food Products            
Schedule of Investments [Line Items]            
Amortized Cost $ 23,935   $ 23,935   $ 23,914  
Amortized Cost Percentage 2.70%   2.70%   2.70%  
Fair Value $ 18,898   $ 18,898   $ 20,530  
Fair Value Percentage 2.30%   2.30%   2.40%  
Trading Companies & Distributors            
Schedule of Investments [Line Items]            
Amortized Cost $ 22,221   $ 22,221   $ 21,937  
Amortized Cost Percentage 2.50%   2.50%   2.50%  
Fair Value $ 22,388   $ 22,388   $ 22,147  
Fair Value Percentage 2.70%   2.70%   2.60%  
Pharmaceuticals            
Schedule of Investments [Line Items]            
Amortized Cost $ 21,477   $ 21,477   $ 19,448  
Amortized Cost Percentage 2.50%   2.50%   2.20%  
Fair Value $ 21,715   $ 21,715   $ 19,718  
Fair Value Percentage 2.60%   2.60%   2.30%  
Personal Care Products            
Schedule of Investments [Line Items]            
Amortized Cost $ 21,032   $ 21,032   $ 20,736  
Amortized Cost Percentage 2.40%   2.40%   2.40%  
Fair Value $ 16,809   $ 16,809   $ 19,776  
Fair Value Percentage 2.00%   2.00%   2.30%  
Distributors            
Schedule of Investments [Line Items]            
Amortized Cost $ 20,704   $ 20,704   $ 29,410  
Amortized Cost Percentage 2.40%   2.40%   3.40%  
Fair Value $ 20,649   $ 20,649   $ 28,988  
Fair Value Percentage 2.50%   2.50%   3.40%  
Diversified Consumer Services            
Schedule of Investments [Line Items]            
Amortized Cost $ 20,581   $ 20,581   $ 20,304  
Amortized Cost Percentage 2.40%   2.40%   2.30%  
Fair Value $ 17,946   $ 17,946   $ 17,636  
Fair Value Percentage 2.20%   2.20%   2.10%  
Software            
Schedule of Investments [Line Items]            
Amortized Cost $ 18,181   $ 18,181   $ 17,428  
Amortized Cost Percentage 2.10%   2.10%   2.00%  
Fair Value $ 18,241   $ 18,241   $ 17,544  
Fair Value Percentage 2.20%   2.20%   2.10%  
Electronic Equipment, Instruments & Components            
Schedule of Investments [Line Items]            
Amortized Cost $ 15,298   $ 15,298   $ 15,293  
Amortized Cost Percentage 1.80%   1.80%   1.70%  
Fair Value $ 15,400   $ 15,400   $ 15,400  
Fair Value Percentage 1.80%   1.80%   1.80%  
Energy Equipment & Services            
Schedule of Investments [Line Items]            
Amortized Cost $ 13,350   $ 13,350   $ 13,400  
Amortized Cost Percentage 1.50%   1.50%   1.50%  
Fair Value $ 13,352   $ 13,352   $ 13,443  
Fair Value Percentage 1.60%   1.60%   1.60%  
Financial Services            
Schedule of Investments [Line Items]            
Amortized Cost $ 11,671   $ 11,671   $ 10,060  
Amortized Cost Percentage 1.30%   1.30%   1.20%  
Fair Value $ 11,803   $ 11,803   $ 10,185  
Fair Value Percentage 1.40%   1.40%   1.20%  
Aerospace & Defense            
Schedule of Investments [Line Items]            
Amortized Cost $ 11,496   $ 11,496   $ 10,846  
Amortized Cost Percentage 1.30%   1.30%   1.20%  
Fair Value $ 11,555   $ 11,555   $ 10,912  
Fair Value Percentage 1.40%   1.40%   1.30%  
Hotels, Restaurants & Leisure            
Schedule of Investments [Line Items]            
Amortized Cost $ 10,058   $ 10,058   $ 4,795  
Amortized Cost Percentage 1.20%   1.20%   0.50%  
Fair Value $ 10,074   $ 10,074   $ 4,838  
Fair Value Percentage 1.20%   1.20%   0.60%  
Construction & Engineering            
Schedule of Investments [Line Items]            
Amortized Cost $ 9,952   $ 9,952   $ 8,510  
Amortized Cost Percentage 1.10%   1.10%   1.00%  
Fair Value $ 9,941   $ 9,941   $ 8,525  
Fair Value Percentage 1.20%   1.20%   1.00%  
Household Products            
Schedule of Investments [Line Items]            
Amortized Cost $ 9,423   $ 9,423   $ 9,295  
Amortized Cost Percentage 1.10%   1.10%   1.10%  
Fair Value $ 8,871   $ 8,871   $ 8,964  
Fair Value Percentage 1.10%   1.10%   1.00%  
Containers & Packaging            
Schedule of Investments [Line Items]            
Amortized Cost $ 9,404   $ 9,404   $ 9,703  
Amortized Cost Percentage 1.10%   1.10%   1.10%  
Fair Value $ 7,758   $ 7,758   $ 8,265  
Fair Value Percentage 0.90%   0.90%   1.00%  
Ground Transportation            
Schedule of Investments [Line Items]            
Amortized Cost $ 9,365   $ 9,365   $ 8,986  
Amortized Cost Percentage 1.10%   1.10%   1.00%  
Fair Value $ 6,882   $ 6,882   $ 8,304  
Fair Value Percentage 0.80%   0.80%   1.00%  
Beverages            
Schedule of Investments [Line Items]            
Amortized Cost $ 9,104   $ 9,104   $ 9,267  
Amortized Cost Percentage 1.00%   1.00%   1.10%  
Fair Value $ 9,177   $ 9,177   $ 9,348  
Fair Value Percentage 1.10%   1.10%   1.10%  
Textiles, Apparel & Luxury Goods            
Schedule of Investments [Line Items]            
Amortized Cost $ 8,585   $ 8,585   $ 8,618  
Amortized Cost Percentage 1.00%   1.00%   1.00%  
Fair Value $ 8,683   $ 8,683   $ 8,727  
Fair Value Percentage 1.00%   1.00%   1.00%  
Marine Transportation            
Schedule of Investments [Line Items]            
Amortized Cost $ 7,070   $ 7,070      
Amortized Cost Percentage 0.80%   0.80%      
Fair Value $ 6,825   $ 6,825      
Fair Value Percentage 0.80%   0.80%      
Consumer Staples Distribution & Retail            
Schedule of Investments [Line Items]            
Amortized Cost $ 6,729   $ 6,729   $ 677  
Amortized Cost Percentage 0.80%   0.80%   0.10%  
Fair Value $ 6,738   $ 6,738   $ 683  
Fair Value Percentage 0.80%   0.80%   0.10%  
Machinery            
Schedule of Investments [Line Items]            
Amortized Cost $ 6,001   $ 6,001   $ 3,296  
Amortized Cost Percentage 0.70%   0.70%   0.40%  
Fair Value $ 6,026   $ 6,026   $ 3,292  
Fair Value Percentage 0.70%   0.70%   0.40%  
Life Sciences Tools & Services            
Schedule of Investments [Line Items]            
Amortized Cost $ 5,970   $ 5,970   $ 5,985  
Amortized Cost Percentage 0.70%   0.70%   0.70%  
Fair Value $ 5,926   $ 5,926   $ 5,978  
Fair Value Percentage 0.70%   0.70%   0.70%  
Diversified Telecommunication Services            
Schedule of Investments [Line Items]            
Amortized Cost $ 305 [13]   $ 305 [13]   $ 305 [14]  
Amortized Cost Percentage 0.00% [13]   0.00% [13]   0.00% [14]  
Fair Value $ 307 [13]   $ 307 [13]   $ 309 [14]  
Fair Value Percentage 0.00% [13]   0.00% [13]   0.00% [14]  
Insurance            
Schedule of Investments [Line Items]            
Amortized Cost         $ 9,865  
Amortized Cost Percentage         1.10%  
Fair Value         $ 9,881  
Fair Value Percentage         1.20%  
Air Freight & Logistics            
Schedule of Investments [Line Items]            
Amortized Cost         $ 6,919  
Amortized Cost Percentage         0.80%  
Fair Value         $ 6,764  
Fair Value Percentage         0.80%  
[1]

# Unless otherwise indicated, all securities are valued using significant unobservable inputs, which are categorized as Level 3 assets under the definition of ASC 820 fair value hierarchy (See "Note 4. Fair Value Measurements").
[2]

(++) Negative cost, if applicable, results from unamortized fees on unfunded commitments, which are capitalized to the investment cost. The negative fair value, if applicable, results from the fair valuation of the unfunded commitment.
[3] + All of the issuers of the investments held by the Company are domiciled in the United States. Certain investments also have international operations.
[4]

# Unless otherwise indicated, all securities are valued using significant unobservable inputs, which are categorized as Level 3 assets under the definition of ASC 820 fair value hierarchy (See "Note 4. Fair Value Measurements").
[5]

(+) Controlled Investments are defined by the Investment Company Act of 1940 Act, as amended (the "1940 Act"), as investments in companies in which the Company owns more than 25% of the voting securities or maintains greater than 50% of the board representation.
[6]

(++) Negative cost, if applicable, results from unamortized fees on unfunded commitments, which are capitalized to the investment cost. The negative fair value, if applicable, results from the fair valuation of the unfunded commitment.
[7] + All of the issuers of the investments held by the Company are domiciled in the United States. Certain investments also have international operations.
[8]

(+) Controlled Investments are defined by the Investment Company Act of 1940 Act, as amended (the "1940 Act"), as investments in companies in which the Company owns more than 25% of the voting securities or maintains greater than 50% of the board representation.
[9]

(4) The negative fair value, if applicable, results from the fair valuation of the unfunded commitment.
[10]

(4) The negative fair value, if applicable, results from the fair valuation of the unfunded commitment.
[11]

(1) The following industry is solely comprised of the Subordinated Certificates of the SDLP. The portfolio companies in SDLP represent a diverse set of industry classifications, which are similar to those in which the Company invests directly. See “Senior Direct Lending Program” below.
[12]

(1) The following industry is solely comprised of the Subordinated Certificates of the SDLP. The portfolio companies in SDLP represent a diverse set of industry classifications, which are similar to those in which the Company invests directly. See “Senior Direct Lending Program” below.
[13]

(2) Represents a percentage that is less than 0.1%.
[14] (2) Represents a percentage that is less than 0.1%