Quarterly report pursuant to Section 13 or 15(d)

Investments - Geographic Composition of Investments (Details)

v3.23.3
Investments - Geographic Composition of Investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Schedule of Investments [Line Items]    
Amortized Cost $ 7,674,474 [1] $ 5,860,186 [2]
Fair Value $ 7,693,866 $ 5,716,521
% of Total Investments at Fair Value 100.00% 100.00%
Fair Value as a % of Net Assets 167.96% 165.44%
Australia    
Schedule of Investments [Line Items]    
Amortized Cost $ 262,031 $ 271,143
Fair Value $ 249,086 $ 269,430
% of Total Investments at Fair Value 3.24% 4.71%
Fair Value as a % of Net Assets 5.43% 7.80%
Canada    
Schedule of Investments [Line Items]    
Amortized Cost $ 60,378 $ 40,335
Fair Value $ 58,521 $ 37,399
% of Total Investments at Fair Value 0.76% 0.65%
Fair Value as a % of Net Assets 1.28% 1.08%
France    
Schedule of Investments [Line Items]    
Amortized Cost $ 35,483 $ 24,513
Fair Value $ 36,225 $ 25,139
% of Total Investments at Fair Value 0.47% 0.44%
Fair Value as a % of Net Assets 0.79% 0.73%
Italy    
Schedule of Investments [Line Items]    
Amortized Cost $ 127,592 $ 122,826
Fair Value $ 132,651 $ 127,443
% of Total Investments at Fair Value 1.73% 2.23%
Fair Value as a % of Net Assets 2.90% 3.69%
Norway    
Schedule of Investments [Line Items]    
Amortized Cost $ 24,711  
Fair Value $ 23,541  
% of Total Investments at Fair Value 0.31%  
Fair Value as a % of Net Assets 0.51%  
Singapore    
Schedule of Investments [Line Items]    
Amortized Cost $ 30,994  
Fair Value $ 30,983  
% of Total Investments at Fair Value 0.40%  
Fair Value as a % of Net Assets 0.68%  
Spain    
Schedule of Investments [Line Items]    
Amortized Cost $ 31,474 $ 31,337
Fair Value $ 31,617 $ 29,958
% of Total Investments at Fair Value 0.41% 0.52%
Fair Value as a % of Net Assets 0.69% 0.87%
Taiwan    
Schedule of Investments [Line Items]    
Amortized Cost $ 45,464 $ 43,619
Fair Value $ 40,950 $ 42,321
% of Total Investments at Fair Value 0.53% 0.74%
Fair Value as a % of Net Assets 0.89% 1.22%
United Kingdom    
Schedule of Investments [Line Items]    
Amortized Cost $ 422,091 $ 240,099
Fair Value $ 424,079 $ 241,933
% of Total Investments at Fair Value 5.51% 4.23%
Fair Value as a % of Net Assets 9.26% 7.00%
United States    
Schedule of Investments [Line Items]    
Amortized Cost $ 6,634,256 $ 5,086,314
Fair Value $ 6,666,213 $ 4,942,898
% of Total Investments at Fair Value 86.64% 86.48%
Fair Value as a % of Net Assets 145.53% 143.05%
[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 in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP").
[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 in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP").