v3.26.3
Condensed Consolidated Schedule of Investments - Derivatives (Parenthetical)
€ in Thousands, £ in Thousands, kr in Thousands, kr in Thousands, kr in Thousands, $ in Thousands, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Sep. 30, 2026
CAD ($)
Sep. 30, 2026
EUR (€)
Sep. 30, 2026
NOK (kr)
Sep. 30, 2026
DKK (kr)
Sep. 30, 2026
GBP (£)
Sep. 30, 2026
SEK (kr)
Dec. 31, 2025
CAD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
NOK (kr)
Dec. 31, 2025
DKK (kr)
Dec. 31, 2025
GBP (£)
Dec. 31, 2025
SEK (kr)
Open Forward Foreign Currency Contract [Line Items]                            
Notional $ 2,792,353 $ 643,979                        
Notional 651,350 1,678,873                        
Unrealized Appreciation (Depreciation) 1,332 2,711                        
Investment at cost 13,250,120 14,387,967                        
Investments at fair value $ 12,946,234 $ 14,207,294                        
Investment, Type [Extensible Enumeration] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member]
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 1                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional $ 69,114 $ 58,283                        
Notional     $ 97,000           $ 80,000          
Unrealized Appreciation (Depreciation) 602 (255)                        
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 2                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 2,484 76,983                        
Notional     $ 3,500             € 65,250        
Unrealized Appreciation (Depreciation) 12 134                        
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 3                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 74,634 2,626                        
Notional       € 65,250             kr 26,704      
Unrealized Appreciation (Depreciation) 382 (22)                        
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 4                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 16,000 1,890                        
Notional       € 14,000               kr 11,958    
Unrealized Appreciation (Depreciation) 68 3                        
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 5                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 2,815 62,779                        
Notional         kr 26,704               £ 47,000  
Unrealized Appreciation (Depreciation) 39 (399)                        
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 6                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 1,831 20,291                        
Notional           kr 11,958               kr 187,760
Unrealized Appreciation (Depreciation) 9 (146)                        
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 7                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 62,375                          
Notional | £             £ 47,000              
Unrealized Appreciation (Depreciation) 5                          
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 8                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 42,353                          
Notional | £             £ 32,000              
Unrealized Appreciation (Depreciation) (111)                          
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 9                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 22,097                          
Notional | kr               kr 217,760            
Unrealized Appreciation (Depreciation) 215                          
Foreign Exchange Contract                            
Open Forward Foreign Currency Contract [Line Items]                            
Unrealized Appreciation (Depreciation) 1,221 (685)                        
Interest Rate Swap                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 2,750,000 500,000                        
Notional 400,000 1,600,000                        
Investments at fair value (76,597) [1] 20,318                        
Upfront Payments / Receipts 0 [1] 0                        
Change in Unrealized Appreciation (Depreciation) $ (96,916) [1],[2] $ 23,487 [3]                        
Interest Rate Swap 1                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives 5.88% [1] 5.88% 5.88% [1] 5.88% [1] 5.88% [1] 5.88% [1] 5.88% [1] 5.88% [1] 5.88% 5.88% 5.88% 5.88% 5.88% 5.88%
Company Pays 1.38% [1] 1.38% 1.38% [1] 1.38% [1] 1.38% [1] 1.38% [1] 1.38% [1] 1.38% [1] 1.38% 1.38% 1.38% 1.38% 1.38% 1.38%
Investment at cost $ 400,000 [1] $ 400,000                        
Investments at fair value 5,745 [1] 8,251                        
Upfront Payments / Receipts 0 [1] 0                        
Change in Unrealized Appreciation (Depreciation) $ (2,506) [1],[2] $ 4,256 [3]                        
Interest Rate Swap 2                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives 5.35% [1] 5.35% 5.35% [1] 5.35% [1] 5.35% [1] 5.35% [1] 5.35% [1] 5.35% [1] 5.35% 5.35% 5.35% 5.35% 5.35% 5.35%
Company Pays 1.65% [1] 1.65% 1.65% [1] 1.65% [1] 1.65% [1] 1.65% [1] 1.65% [1] 1.65% [1] 1.65% 1.65% 1.65% 1.65% 1.65% 1.65%
Investment at cost $ 400,000 [1] $ 400,000                        
Investments at fair value (734) [1] 2,488                        
Upfront Payments / Receipts 0 [1] 0                        
Change in Unrealized Appreciation (Depreciation) $ (3,222) [1],[2] $ 8,343 [3]                        
Interest Rate Swap 3                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives 5.35% [1] 5.35% 5.35% [1] 5.35% [1] 5.35% [1] 5.35% [1] 5.35% [1] 5.35% [1] 5.35% 5.35% 5.35% 5.35% 5.35% 5.35%
Company Pays 1.39% [1] 1.39% 1.39% [1] 1.39% [1] 1.39% [1] 1.39% [1] 1.39% [1] 1.39% [1] 1.39% 1.39% 1.39% 1.39% 1.39% 1.39%
Investment at cost $ 300,000 [1] $ 300,000                        
Investments at fair value (3,078) [1] 3,803                        
Upfront Payments / Receipts 0 [1] 0                        
Change in Unrealized Appreciation (Depreciation) $ (6,882) [1],[2] $ 5,112 [3]                        
Interest Rate Swap 4                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives 5.30% [1] 5.30% 5.30% [1] 5.30% [1] 5.30% [1] 5.30% [1] 5.30% [1] 5.30% [1] 5.30% 5.30% 5.30% 5.30% 5.30% 5.30%
Company Pays 1.46% [1] 1.46% 1.46% [1] 1.46% [1] 1.46% [1] 1.46% [1] 1.46% [1] 1.46% [1] 1.46% 1.46% 1.46% 1.46% 1.46% 1.46%
Investment at cost $ 500,000 [1] $ 500,000                        
Investments at fair value (10,170) [1] 7,665                        
Upfront Payments / Receipts 0 [1] 0                        
Change in Unrealized Appreciation (Depreciation) $ (17,834) [1],[2] $ 7,665 [3]                        
Interest Rate Swap 5                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives 5.13% [1] 5.13% 5.13% [1] 5.13% [1] 5.13% [1] 5.13% [1] 5.13% [1] 5.13% [1] 5.13% 5.13% 5.13% 5.13% 5.13% 5.13%
Company Pays 1.66% [1] 1.66% 1.66% [1] 1.66% [1] 1.66% [1] 1.66% [1] 1.66% [1] 1.66% [1] 1.66% 1.66% 1.66% 1.66% 1.66% 1.66%
Investment at cost $ 500,000 [1] $ 500,000                        
Investments at fair value (27,048) [1] (1,889)                        
Upfront Payments / Receipts 0 [1] 0                        
Change in Unrealized Appreciation (Depreciation) $ (25,160) [1],[2] $ (1,889) [3]                        
Interest Rate Swap 6                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives [1] 5.25%   5.25% 5.25% 5.25% 5.25% 5.25% 5.25%            
Company Pays [1] 1.93%   1.93% 1.93% 1.93% 1.93% 1.93% 1.93%            
Investment at cost [1] $ 400,000                          
Investments at fair value [1] (16,333)                          
Upfront Payments / Receipts [1] 0                          
Change in Unrealized Appreciation (Depreciation) [1],[2] $ (16,333)                          
Interest Rate Swap 7                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives [1] 5.90%   5.90% 5.90% 5.90% 5.90% 5.90% 5.90%            
Company Pays [1] 2.00%   2.00% 2.00% 2.00% 2.00% 2.00% 2.00%            
Investment at cost [1] $ 650,000                          
Investments at fair value [1] (24,979)                          
Upfront Payments / Receipts [1] 0                          
Change in Unrealized Appreciation (Depreciation) [1],[2] $ (24,979)                          
[1] All interest rate swaps are bilateral.
[2] For interest rate swaps designated in qualifying hedge relationships, the change in fair value is recorded in Interest expense in the Condensed Consolidated Statements of Operations.
[3] For interest rate swaps designated in qualifying hedge relationships, the change in fair value is recorded in Interest expense in the Condensed Consolidated Statements of Operations.