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Portfolio Investments - Schedule of Portfolio of Investments by Industry (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Sep. 30, 2025
Schedule of Investments [Line Items]      
Investment, cost $ 7,429,166 [1]   $ 6,863,940 [2]
Total investments at fair value $ 7,433,861 [1]   $ 6,899,031 [2]
% of Net Assets 159.40%   151.90%
Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 100.00%   100.00%
Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 100.00% 100.00%  
Application Software      
Schedule of Investments [Line Items]      
Investment, cost $ 1,138,786   $ 1,077,261
Total investments at fair value $ 1,130,307   $ 1,075,502
% of Net Assets 24.22%   23.69%
Application Software | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 15.28%   15.67%
Application Software | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 15.19% 15.57%  
Aerospace & Defense      
Schedule of Investments [Line Items]      
Investment, cost $ 536,187   $ 440,518
Total investments at fair value $ 542,263   $ 442,866
% of Net Assets 11.63%   9.75%
Aerospace & Defense | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 7.22%   6.42%
Aerospace & Defense | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 7.29% 6.42%  
Health Care Services      
Schedule of Investments [Line Items]      
Investment, cost $ 419,658   $ 408,129
Total investments at fair value $ 419,360   $ 406,784
% of Net Assets 8.99%   8.96%
Health Care Services | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 5.65%   5.95%
Health Care Services | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 5.64% 5.90%  
Life Sciences Tools & Services      
Schedule of Investments [Line Items]      
Investment, cost $ 318,106   $ 311,963
Total investments at fair value $ 320,048   $ 312,748
% of Net Assets 6.86%   6.89%
Life Sciences Tools & Services | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 4.28%   4.54%
Life Sciences Tools & Services | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 4.31% 4.53%  
Diversified Support Services      
Schedule of Investments [Line Items]      
Investment, cost $ 311,456   $ 269,009
Total investments at fair value $ 309,127   $ 269,835
% of Net Assets 6.63%   5.94%
Diversified Support Services | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 4.19%   3.92%
Diversified Support Services | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 4.16% 3.91%  
Pharmaceuticals      
Schedule of Investments [Line Items]      
Investment, cost $ 274,461   $ 307,950
Total investments at fair value $ 280,075   $ 314,560
% of Net Assets 6.01%   6.93%
Pharmaceuticals | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 3.69%   4.49%
Pharmaceuticals | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 3.77% 4.56%  
Interactive Media & Services      
Schedule of Investments [Line Items]      
Investment, cost $ 263,698   $ 259,735
Total investments at fair value $ 267,708   $ 263,529
% of Net Assets 5.74%   5.80%
Interactive Media & Services | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 3.55%   3.78%
Interactive Media & Services | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 3.60% 3.82%  
Specialized Finance      
Schedule of Investments [Line Items]      
Investment, cost $ 242,985   $ 242,474
Total investments at fair value $ 243,678   $ 243,369
% of Net Assets 5.23%   5.36%
Specialized Finance | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 3.27%   3.53%
Specialized Finance | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 3.28% 3.53%  
Systems Software      
Schedule of Investments [Line Items]      
Investment, cost $ 241,909   $ 230,953
Total investments at fair value $ 238,395   $ 231,233
% of Net Assets 5.11%   5.09%
Systems Software | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 3.26%   3.36%
Systems Software | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 3.21% 3.35%  
Health Care Equipment      
Schedule of Investments [Line Items]      
Investment, cost $ 223,662   $ 221,030
Total investments at fair value $ 227,116   $ 224,448
% of Net Assets 4.87%   4.94%
Health Care Equipment | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 3.01%   3.22%
Health Care Equipment | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 3.06% 3.25%  
Packaged Foods & Meats      
Schedule of Investments [Line Items]      
Investment, cost $ 222,023   $ 221,939
Total investments at fair value $ 222,093   $ 223,605
% of Net Assets 4.76%   4.92%
Packaged Foods & Meats | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.99%   3.23%
Packaged Foods & Meats | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.99% 3.24%  
Health Care Technology      
Schedule of Investments [Line Items]      
Investment, cost $ 217,218   $ 114,695
Total investments at fair value $ 226,066   $ 123,048
% of Net Assets 4.85%   2.71%
Health Care Technology | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.92%   1.67%
Health Care Technology | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 3.04% 1.78%  
Diversified Financial Services      
Schedule of Investments [Line Items]      
Investment, cost $ 202,991   $ 141,952
Total investments at fair value $ 209,482   $ 148,590
% of Net Assets 4.49%   3.27%
Diversified Financial Services | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.73%   2.07%
Diversified Financial Services | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.82% 2.15%  
Building Products      
Schedule of Investments [Line Items]      
Investment, cost $ 195,075   $ 179,198
Total investments at fair value $ 194,844   $ 179,114
% of Net Assets 4.18%   3.94%
Building Products | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.63%   2.61%
Building Products | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.62% 2.60%  
Construction & Engineering      
Schedule of Investments [Line Items]      
Investment, cost $ 183,928   $ 107,579
Total investments at fair value $ 164,474   $ 101,248
% of Net Assets 3.53%   2.23%
Construction & Engineering | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.48%   1.57%
Construction & Engineering | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.21% 1.47%  
Specialized Consumer Services      
Schedule of Investments [Line Items]      
Investment, cost $ 179,751   $ 177,353
Total investments at fair value $ 179,518   $ 177,197
% of Net Assets 3.85%   3.90%
Specialized Consumer Services | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.42%   2.58%
Specialized Consumer Services | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.41% 2.57%  
Education Services      
Schedule of Investments [Line Items]      
Investment, cost $ 170,176   $ 159,758
Total investments at fair value $ 165,706   $ 155,806
% of Net Assets 3.55%   3.43%
Education Services | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.29%   2.33%
Education Services | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.23% 2.26%  
Health Care Supplies      
Schedule of Investments [Line Items]      
Investment, cost $ 157,204   $ 153,582
Total investments at fair value $ 157,240   $ 153,918
% of Net Assets 3.37%   3.39%
Health Care Supplies | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.12%   2.24%
Health Care Supplies | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 2.12% 2.23%  
Paper & Plastic Packaging Products & Materials      
Schedule of Investments [Line Items]      
Investment, cost $ 146,283   $ 37,703
Total investments at fair value $ 138,080   $ 37,857
% of Net Assets 2.96%   0.83%
Paper & Plastic Packaging Products & Materials | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.97%   0.55%
Paper & Plastic Packaging Products & Materials | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.86% 0.55%  
Insurance Brokers      
Schedule of Investments [Line Items]      
Investment, cost $ 134,868   $ 131,423
Total investments at fair value $ 135,216   $ 132,313
% of Net Assets 2.90%   2.91%
Insurance Brokers | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.82%   1.91%
Insurance Brokers | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.82% 1.92%  
Property & Casualty Insurance      
Schedule of Investments [Line Items]      
Investment, cost $ 96,348   $ 76,662
Total investments at fair value $ 97,565   $ 77,904
% of Net Assets 2.09%   1.72%
Property & Casualty Insurance | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.30%   1.12%
Property & Casualty Insurance | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.31% 1.13%  
Electrical Components & Equipment      
Schedule of Investments [Line Items]      
Investment, cost $ 96,302   $ 96,510
Total investments at fair value $ 96,744   $ 96,323
% of Net Assets 2.07%   2.12%
Electrical Components & Equipment | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.30%   1.41%
Electrical Components & Equipment | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.30% 1.40%  
Construction Machinery & Heavy Transportation Equipment      
Schedule of Investments [Line Items]      
Investment, cost $ 86,354   $ 84,857
Total investments at fair value $ 86,687   $ 85,255
% of Net Assets 1.86%   1.88%
Construction Machinery & Heavy Transportation Equipment | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.16%   1.24%
Construction Machinery & Heavy Transportation Equipment | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.17% 1.24%  
Environmental & Facilities Services      
Schedule of Investments [Line Items]      
Investment, cost $ 85,024   $ 84,561
Total investments at fair value $ 81,793   $ 82,078
% of Net Assets 1.75%   1.81%
Environmental & Facilities Services | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.14%   1.23%
Environmental & Facilities Services | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.10% 1.19%  
Drug Retail      
Schedule of Investments [Line Items]      
Investment, cost $ 83,869   $ 84,288
Total investments at fair value $ 83,970   $ 84,282
% of Net Assets 1.80%   1.86%
Drug Retail | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.13%   1.23%
Drug Retail | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.13% 1.22%  
Communications Equipment      
Schedule of Investments [Line Items]      
Investment, cost $ 80,015   $ 81,615
Total investments at fair value $ 79,845   $ 81,450
% of Net Assets 1.71%   1.79%
Communications Equipment | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.08%   1.19%
Communications Equipment | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.07% 1.18%  
Research & Consulting Services      
Schedule of Investments [Line Items]      
Investment, cost $ 76,406   $ 93,967
Total investments at fair value $ 74,902   $ 88,990
% of Net Assets 1.61%   1.96%
Research & Consulting Services | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.03%   1.37%
Research & Consulting Services | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.01% 1.29%  
Cable & Satellite      
Schedule of Investments [Line Items]      
Investment, cost $ 74,740   $ 67,734
Total investments at fair value $ 76,126   $ 68,135
% of Net Assets 1.63%   1.50%
Cable & Satellite | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.01%   0.99%
Cable & Satellite | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 1.02% 0.99%  
Other Specialty Retail      
Schedule of Investments [Line Items]      
Investment, cost $ 69,095   $ 69,073
Total investments at fair value $ 71,803   $ 71,224
% of Net Assets 1.54%   1.57%
Other Specialty Retail | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.93%   1.01%
Other Specialty Retail | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.97% 1.03%  
Alternative Carriers      
Schedule of Investments [Line Items]      
Investment, cost $ 67,486   $ 45,152
Total investments at fair value $ 65,004   $ 45,601
% of Net Assets 1.39%   1.00%
Alternative Carriers | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.91%   0.66%
Alternative Carriers | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.87% 0.66%  
Real Estate Services      
Schedule of Investments [Line Items]      
Investment, cost $ 58,382   $ 58,482
Total investments at fair value $ 58,534   $ 58,656
% of Net Assets 1.26%   1.29%
Real Estate Services | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.79%   0.85%
Real Estate Services | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.79% 0.85%  
Soft Drinks & Non-alcoholic Beverages      
Schedule of Investments [Line Items]      
Investment, cost $ 56,251   $ 56,343
Total investments at fair value $ 57,096   $ 56,388
% of Net Assets 1.22%   1.24%
Soft Drinks & Non-alcoholic Beverages | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.76%   0.82%
Soft Drinks & Non-alcoholic Beverages | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.77% 0.82%  
Industrial Machinery & Supplies & Components      
Schedule of Investments [Line Items]      
Investment, cost $ 55,984   $ 58,103
Total investments at fair value $ 55,823   $ 58,068
% of Net Assets 1.20%   1.28%
Industrial Machinery & Supplies & Components | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.75%   0.85%
Industrial Machinery & Supplies & Components | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.75% 0.84%  
Casinos & Gaming      
Schedule of Investments [Line Items]      
Investment, cost $ 54,682   $ 0
Total investments at fair value $ 54,800   $ 0
% of Net Assets 1.18%   0.00%
Casinos & Gaming | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.74%   0.00%
Casinos & Gaming | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.74% 0.00%  
Air Freight & Logistics      
Schedule of Investments [Line Items]      
Investment, cost $ 53,518   $ 51,249
Total investments at fair value $ 53,677   $ 51,502
% of Net Assets 1.15%   1.13%
Air Freight & Logistics | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.72%   0.75%
Air Freight & Logistics | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.72% 0.75%  
Distributors      
Schedule of Investments [Line Items]      
Investment, cost $ 52,527   $ 56,976
Total investments at fair value $ 53,154   $ 57,204
% of Net Assets 1.14%   1.26%
Distributors | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.71%   0.83%
Distributors | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.72% 0.83%  
Asset Management & Custody Banks      
Schedule of Investments [Line Items]      
Investment, cost $ 50,765   $ 50,745
Total investments at fair value $ 54,251   $ 54,300
% of Net Assets 1.16%   1.20%
Asset Management & Custody Banks | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.68%   0.74%
Asset Management & Custody Banks | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.73% 0.79%  
Office Services & Supplies      
Schedule of Investments [Line Items]      
Investment, cost $ 48,398   $ 76,041
Total investments at fair value $ 48,821   $ 71,936
% of Net Assets 1.05%   1.58%
Office Services & Supplies | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.65%   1.11%
Office Services & Supplies | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.66% 1.04%  
Movies & Entertainment      
Schedule of Investments [Line Items]      
Investment, cost $ 45,241   $ 45,345
Total investments at fair value $ 45,501   $ 45,965
% of Net Assets 0.98%   1.01%
Movies & Entertainment | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.61%   0.66%
Movies & Entertainment | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.61% 0.67%  
Diversified Chemicals      
Schedule of Investments [Line Items]      
Investment, cost $ 44,476   $ 44,349
Total investments at fair value $ 50,562   $ 50,531
% of Net Assets 1.08%   1.11%
Diversified Chemicals | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.60%   0.65%
Diversified Chemicals | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.68% 0.73%  
Personal Care Products      
Schedule of Investments [Line Items]      
Investment, cost $ 36,482   $ 0
Total investments at fair value $ 36,486   $ 0
% of Net Assets 0.78%   0.00%
Personal Care Products | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.49%   0.00%
Personal Care Products | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.49% 0.00%  
Food Distributors      
Schedule of Investments [Line Items]      
Investment, cost $ 35,415   $ 35,193
Total investments at fair value $ 37,556   $ 37,590
% of Net Assets 0.81%   0.83%
Food Distributors | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.48%   0.51%
Food Distributors | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.51% 0.54%  
Footwear      
Schedule of Investments [Line Items]      
Investment, cost $ 31,650   $ 31,650
Total investments at fair value $ 34,962   $ 34,219
% of Net Assets 0.75%   0.75%
Footwear | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.43%   0.46%
Footwear | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.47% 0.50%  
Multi-Sector Holdings      
Schedule of Investments [Line Items]      
Investment, cost $ 28,718   $ 84,056
Total investments at fair value $ 28,766   $ 86,117
% of Net Assets 0.62%   1.90%
Multi-Sector Holdings | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.39%   1.22%
Multi-Sector Holdings | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.39% 1.25%  
Wireless Telecommunication Services      
Schedule of Investments [Line Items]      
Investment, cost $ 27,559   $ 27,550
Total investments at fair value $ 27,702   $ 27,695
% of Net Assets 0.59%   0.61%
Wireless Telecommunication Services | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.37%   0.40%
Wireless Telecommunication Services | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.37% 0.40%  
Trading Companies & Distributors      
Schedule of Investments [Line Items]      
Investment, cost $ 22,429   $ 38,561
Total investments at fair value $ 22,428   $ 38,349
% of Net Assets 0.48%   0.84%
Trading Companies & Distributors | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.30%   0.56%
Trading Companies & Distributors | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.30% 0.56%  
Oil & Gas Drilling      
Schedule of Investments [Line Items]      
Investment, cost $ 22,270   $ 0
Total investments at fair value $ 21,894   $ 0
% of Net Assets 0.47%   0.00%
Oil & Gas Drilling | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.30%   0.00%
Oil & Gas Drilling | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.29% 0.00%  
Hotels, Resorts & Cruise Lines      
Schedule of Investments [Line Items]      
Investment, cost $ 21,399   $ 20,535
Total investments at fair value $ 20,936   $ 20,095
% of Net Assets 0.45%   0.44%
Hotels, Resorts & Cruise Lines | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.29%   0.30%
Hotels, Resorts & Cruise Lines | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.28% 0.29%  
Consumer Finance      
Schedule of Investments [Line Items]      
Investment, cost $ 19,749   $ 19,701
Total investments at fair value $ 19,888   $ 19,912
% of Net Assets 0.43%   0.44%
Consumer Finance | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.27%   0.29%
Consumer Finance | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.27% 0.29%  
Broadcasting      
Schedule of Investments [Line Items]      
Investment, cost $ 19,154   $ 0
Total investments at fair value $ 18,080   $ 0
% of Net Assets 0.39%   0.00%
Broadcasting | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.26%   0.00%
Broadcasting | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.24% 0.00%  
Specialty Chemicals      
Schedule of Investments [Line Items]      
Investment, cost $ 17,282   $ 17,325
Total investments at fair value $ 17,456   $ 17,400
% of Net Assets 0.37%   0.38%
Specialty Chemicals | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.23%   0.25%
Specialty Chemicals | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.23% 0.25%  
Biotechnology      
Schedule of Investments [Line Items]      
Investment, cost $ 10,850   $ 12,361
Total investments at fair value $ 10,600   $ 12,154
% of Net Assets 0.23%   0.27%
Biotechnology | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.15%   0.18%
Biotechnology | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.14% 0.18%  
Health Care Distributors      
Schedule of Investments [Line Items]      
Investment, cost $ 10,328   $ 10,422
Total investments at fair value $ 10,053   $ 10,119
% of Net Assets 0.22%   0.22%
Health Care Distributors | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.14%   0.15%
Health Care Distributors | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.14% 0.15%  
Real Estate Development      
Schedule of Investments [Line Items]      
Investment, cost $ 9,593   $ 10,083
Total investments at fair value $ 9,600   $ 10,138
% of Net Assets 0.21%   0.22%
Real Estate Development | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.13%   0.15%
Real Estate Development | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.13% 0.15%  
Financial Exchanges & Data      
Schedule of Investments [Line Items]      
Investment, cost $ 0   $ 47,035
Total investments at fair value $ 0   $ 47,723
% of Net Assets 0.00%   1.05%
Financial Exchanges & Data | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.00%   0.69%
Financial Exchanges & Data | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.00% 0.69%  
Gold      
Schedule of Investments [Line Items]      
Investment, cost $ 0   $ 20,961
Total investments at fair value $ 0   $ 22,105
% of Net Assets 0.00%   0.49%
Gold | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.00%   0.31%
Gold | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.00% 0.32%  
Metal, Glass & Plastic Containers      
Schedule of Investments [Line Items]      
Investment, cost $ 0   $ 12,251
Total investments at fair value $ 0   $ 12,053
% of Net Assets 0.00%   0.27%
Metal, Glass & Plastic Containers | Investment Owned, At Cost | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.00%   0.18%
Metal, Glass & Plastic Containers | Investment Owned, At Fair Value | Investment Sector Concentration Risk      
Schedule of Investments [Line Items]      
% of Total Investments 0.00% 0.17%  
[1] Non-Control/Non-Affiliate Investments are investments that are neither Control Investments nor Affiliate Investments. Control Investments generally are defined by the Investment Company Act of 1940, as amended (the “Investment Company Act”), as investments in companies in which the Company owns more than 25% of the voting securities and/or has the power to exercise control over the management or policies of the company. Affiliate Investments generally are defined by the Investment Company Act as investments in companies in which the Company owns between 5% and 25% of the voting securities.
[2] Non-Control/Non-Affiliate Investments are investments that are neither Control Investments nor Affiliate Investments. Control Investments generally are defined by the Investment Company Act as investments in companies in which the Company owns more than 25% of the voting securities and/or has the power to exercise control over the management or policies of the company. Affiliate Investments generally are defined by the Investment Company Act as investments in companies in which the Company owns between 5% and 25% of the voting securities.