v3.25.3
Significant Agreements And Related Party Transactions - Schedule of Affiliated Investments Including Investments in Money Market Funds (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Non-Controlled Affiliates          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     $ 131,993 $ 42,419 $ 42,419
Gross Additions [1]     998,524   1,396,051
Gross Reductions [2]     (986,589)   (1,302,515)
Net Realized Gain(Loss)     (33,824) (2,015) (2,015)
Net Change in Unrealized Appreciation (Depreciation) $ (6,587) $ (352) 19,462 (1,814) (1,947)
Ending Fair Value Balance 129,566   129,566   131,993
Dividend, Interest, PIK and Other Income     6,661   6,345
Investment, Identifier [Axis]: Non-Controlled Affiliates ABC Investment Holdco Inc. dba ABC Plumbing          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     11,551 0 0
Gross Additions [1]     947   11,883
Gross Reductions [2]     (369)   (302)
Net Realized Gain(Loss)     0   0
Net Change in Unrealized Appreciation (Depreciation)     (564)   (30)
Ending Fair Value Balance 11,565   11,565   11,551
Dividend, Interest, PIK and Other Income     850   713
Investment, Identifier [Axis]: Non-Controlled Affiliates ATX Networks Corporation          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     0 6,437 6,437
Gross Additions [1]         128
Gross Reductions [2]         (3,168)
Net Realized Gain(Loss)         (2,673)
Net Change in Unrealized Appreciation (Depreciation)         (724)
Ending Fair Value Balance         0
Dividend, Interest, PIK and Other Income         235
Investment, Identifier [Axis]: Non-Controlled Affiliates Animal Supply Holdings, LLC          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     0 0 0
Gross Additions [1]     0   0
Gross Reductions [2]     0   0
Net Realized Gain(Loss)     (22,902)   0
Net Change in Unrealized Appreciation (Depreciation)     22,902   0
Ending Fair Value Balance 0   0   0
Dividend, Interest, PIK and Other Income     0   0
Investment, Identifier [Axis]: Non-Controlled Affiliates Collaborative Imaging, LLC dba Texas Radiology Associates          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     0 4,122 4,122
Gross Additions [1]         0
Gross Reductions [2]         (4,088)
Net Realized Gain(Loss)         658
Net Change in Unrealized Appreciation (Depreciation)         (692)
Ending Fair Value Balance         0
Dividend, Interest, PIK and Other Income         85
Investment, Identifier [Axis]: Non-Controlled Affiliates Conergy Asia & ME Pte. LTD          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     0 0 0
Gross Additions [1]     0   0
Gross Reductions [2]     0   0
Net Realized Gain(Loss)     (6,355)   0
Net Change in Unrealized Appreciation (Depreciation)     6,355   0
Ending Fair Value Balance 0   0   0
Dividend, Interest, PIK and Other Income     0   0
Investment, Identifier [Axis]: Non-Controlled Affiliates Elah Holdings Inc.          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     5,396 5,396 5,396
Gross Additions [1]     0   0
Gross Reductions [2]     0   0
Net Realized Gain(Loss)     0   0
Net Change in Unrealized Appreciation (Depreciation)     (1)   0
Ending Fair Value Balance 5,395   5,395   5,396
Dividend, Interest, PIK and Other Income     0   0
Investment, Identifier [Axis]: Non-Controlled Affiliates Goldman Sachs Financial Square Government Fund          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     25,238 0 0
Gross Additions [1]     991,177   1,318,734
Gross Reductions [2]     (983,722)   (1,293,496)
Net Realized Gain(Loss)     0   0
Net Change in Unrealized Appreciation (Depreciation)     0   0
Ending Fair Value Balance 32,693   32,693   25,238
Dividend, Interest, PIK and Other Income     606   1,380
Investment, Identifier [Axis]: Non-Controlled Affiliates Iracore International Holdings, Inc.          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     7,015 9,101 9,101
Gross Additions [1]     0   0
Gross Reductions [2]     0   (859)
Net Realized Gain(Loss)     0   0
Net Change in Unrealized Appreciation (Depreciation)     (2,735)   (1,227)
Ending Fair Value Balance 4,280   4,280   7,015
Dividend, Interest, PIK and Other Income     153   807
Investment, Identifier [Axis]: Non-Controlled Affiliates Kawa Solar Holdings Limited          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     741 1,073 1,073
Gross Additions [1]     0   0
Gross Reductions [2]     (614)   0
Net Realized Gain(Loss)     (4,567)   0
Net Change in Unrealized Appreciation (Depreciation)     4,440   (332)
Ending Fair Value Balance 0   0   741
Dividend, Interest, PIK and Other Income     0   0
Investment, Identifier [Axis]: Non-Controlled Affiliates LCG Vardiman Black, LLC (dba Specialty Dental Brands)          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     814 0 0
Gross Additions [1]         955
Gross Reductions [2]         0
Net Realized Gain(Loss)         0
Net Change in Unrealized Appreciation (Depreciation)         (141)
Ending Fair Value Balance         814
Dividend, Interest, PIK and Other Income         85
Investment, Identifier [Axis]: Non-Controlled Affiliates MedeAnalytics, Inc.          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     156 146 146
Gross Additions [1]     0   0
Gross Reductions [2]     0   0
Net Realized Gain(Loss)     0   0
Net Change in Unrealized Appreciation (Depreciation)     (1)   10
Ending Fair Value Balance 155   155   156
Dividend, Interest, PIK and Other Income     0   0
Investment, Identifier [Axis]: Non-Controlled Affiliates Pluralsight, Inc.          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     42,214 0 0
Gross Additions [1]     1,564   41,716
Gross Reductions [2]     (36)   0
Net Realized Gain(Loss)     0   0
Net Change in Unrealized Appreciation (Depreciation)     (7,391)   498
Ending Fair Value Balance 36,351   36,351   42,214
Dividend, Interest, PIK and Other Income     2,595   524
Investment, Identifier [Axis]: Non-Controlled Affiliates SDB HOLDCO, LLC dba Specialty Dental Brands          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     814    
Gross Additions [1]     48    
Gross Reductions [2]     (1)    
Net Realized Gain(Loss)     0    
Net Change in Unrealized Appreciation (Depreciation)     (211)    
Ending Fair Value Balance 650   650   814
Dividend, Interest, PIK and Other Income     59    
Investment, Identifier [Axis]: Non-Controlled Affiliates SEM Holdings, LLC dba Southeast Mechanical, LLC          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     21,130    
Gross Additions [1]     4,223    
Gross Reductions [2]     (1,847)    
Net Realized Gain(Loss)     0    
Net Change in Unrealized Appreciation (Depreciation)     (169)    
Ending Fair Value Balance 23,337   23,337   21,130
Dividend, Interest, PIK and Other Income     1,830    
Investment, Identifier [Axis]: Non-Controlled Affiliates Southeast Mechanical LLC Dba SEM Holdings LLC          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     21,130 16,144 16,144
Gross Additions [1]         5,607
Gross Reductions [2]         (602)
Net Realized Gain(Loss)         0
Net Change in Unrealized Appreciation (Depreciation)         (19)
Ending Fair Value Balance         21,130
Dividend, Interest, PIK and Other Income         2,184
Investment, Identifier [Axis]: Non-Controlled Affiliates Thrasio Holdings, Inc.          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     17,738    
Gross Additions [1]     565    
Gross Reductions [2]     0    
Net Realized Gain(Loss)     0    
Net Change in Unrealized Appreciation (Depreciation)     (3,163)    
Ending Fair Value Balance $ 15,140   15,140   17,738
Dividend, Interest, PIK and Other Income     568    
Investment, Identifier [Axis]: Non-Controlled Affiliates Thrasio, LLC          
Schedule Of Investments [Line Items]          
Beginning Fair Value Balance     $ 17,738 $ 0 0
Gross Additions [1]         17,028
Gross Reductions [2]         0
Net Realized Gain(Loss)         0
Net Change in Unrealized Appreciation (Depreciation)         710
Ending Fair Value Balance         17,738
Dividend, Interest, PIK and Other Income         $ 332
[1] Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK, the accretion of discounts, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category.
[2] Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category.