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Consolidated Schedule of Investments (Parenthetical) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Schedule of Investments [Line Items]          
Unrealized gain (loss) for U.S. federal income tax purposes $ 85,200,000   $ 85,200,000   $ 63,700,000
Cost for income tax purposes 5,000,000,000.0   5,000,000,000.0   3,700,000,000
Unrealized loss for U.S. federal income tax purposes 0   0   0
Unrealized gain for U.S. federal income tax purposes 85,200,000   85,200,000   63,700,000
Restricted investments, fair value $ 456,700,000   $ 456,700,000   $ 478,600,000
Restricted investments as a percentage of net assets 16.60%   16.60%   26.30%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance     $ 3,807,639,000    
Net change in unrealized gain (loss)     1,105,000 $ 10,734,000  
Ending balance $ 5,083,969,000   $ 5,083,969,000   $ 3,807,639,000
Non-qualifying assets as a percent of total assets 16.80%   16.80%   16.70%
Non-controlled, affiliated investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance     $ 111,947,000 31,633,000 $ 31,633,000
Gross Additions     46,637,000 [1]   66,691,000 [2]
Gross Reductions     (16,561,000) [3]   (1,914,000) [4]
Net change in unrealized gain (loss) $ 1,672,000 $ 514,000 4,376,000 510,000 1,146,000
Transfers     0   14,391,000
Ending balance 146,399,000   146,399,000   111,947,000
Interest Income     1,691,000   559,000
Dividend income 1,778,000 456,000 4,489,000 1,013,000 1,641,000
Other income     0   0
Controlled, affiliated investments          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance     0    
Gross Additions [1]     2,189,000    
Gross Reductions [3]     0    
Net change in unrealized gain (loss) (2,000) $ 0 (2,000) 0  
Transfers     0    
Ending balance $ 2,187,000   2,187,000   0
Interest Income     0    
Dividend income     0    
Other income     $ 0    
Interest Rate Swap          
Schedule of Investments [Line Items]          
Company Receives 6.75%   6.75%    
Basis spread on variable rate 2.565%   2.565%    
Notional Amount $ 700,000,000   $ 700,000,000    
Fair Value 23,200,000   23,200,000    
Upfront Payments/Receipts 0   0    
Change in Unrealized Appreciation / (Depreciation) (1,766,000)   (1,766,000)    
Interest Rate Swap | 2029 Notes | Unsecured debt investments          
Schedule of Investments [Line Items]          
Fair Value 23,189,000   23,189,000    
Investment, Identifier [Axis]: 6Sense Insights, Inc., Series E-1 Preferred Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6]     8,364,000    
Ending balance 7,785,000 [7],[8]   7,785,000 [7],[8]   8,364,000 [5],[6]
Investment, Identifier [Axis]: AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [9]     14,409,000 [10] 0 0
Gross Additions     1,215,000 [1],[10]   14,579,000 [2],[9]
Gross Reductions     (399,000) [3],[10]   0 [4],[9]
Net change in unrealized gain (loss)     1,147,000 [10]   (170,000) [9]
Transfers     0 [10]   0 [9]
Ending balance [10] 16,372,000   16,372,000   14,409,000 [9]
Interest Income     823,000 [10]   423,000 [9]
Dividend income     0 [10]   0 [9]
Other income     0 [10]   0 [9]
Investment, Identifier [Axis]: AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC, First lien senior secured loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [11],[12],[13]     8,784,000    
Ending balance 9,447,000 [14],[15]   9,447,000 [14],[15]   8,784,000 [11],[12],[13]
Investment, Identifier [Axis]: AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC, LLC Interest          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6],[12],[13],[16]     5,625,000    
Ending balance 6,924,000 [7],[8],[15],[17]   6,924,000 [7],[8],[15],[17]   5,625,000 [5],[6],[12],[13],[16]
Investment, Identifier [Axis]: AAM Series 2.1 Aviation Feeder, LLC          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [9]     17,438,000 [10] 348,000 348,000
Gross Additions     7,187,000 [1],[10]   16,913,000 [2],[9]
Gross Reductions     (11,717,000) [3],[10]   0 [4],[9]
Net change in unrealized gain (loss)     (76,000) [10]   177,000 [9]
Transfers     0 [10]   0 [9]
Ending balance [10] 12,832,000   12,832,000   17,438,000 [9]
Interest Income     820,000 [10]   136,000 [9]
Dividend income     0 [10]   0 [9]
Other income     0 [10]   0 [9]
Investment, Identifier [Axis]: AAM Series 2.1 Aviation Feeder, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [11],[12],[13]     10,437,000    
Ending balance 8,874,000 [14],[15]   8,874,000 [14],[15]   10,437,000 [11],[12],[13]
Investment, Identifier [Axis]: AAM Series 2.1 Aviation Feeder, LLC, LLC Interest          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6],[12],[13],[16]     7,001,000    
Ending balance 3,958,000 [7],[8],[15],[17]   3,958,000 [7],[8],[15],[17]   7,001,000 [5],[6],[12],[13],[16]
Investment, Identifier [Axis]: AI Titan Parent, Inc. (dba Prometheus Group), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] (28,000)   (28,000)    
Investment, Identifier [Axis]: AI Titan Parent, Inc. (dba Prometheus Group), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 27,271,000   27,271,000    
Investment, Identifier [Axis]: AI Titan Parent, Inc. (dba Prometheus Group), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (34,000)   (34,000)    
Investment, Identifier [Axis]: Accelerate Topco Holdings, LLC, Common Units          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6]     417,000    
Ending balance 546,000 [7],[8]   546,000 [7],[8]   417,000 [5],[6]
Investment, Identifier [Axis]: Acorns Grow Incorporated, Series F Preferred Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [6],[11],[12],[21]     10,502,000    
Ending balance 11,095,000 [8],[14],[15],[22]   11,095,000 [8],[14],[15],[22]   10,502,000 [6],[11],[12],[21]
Investment, Identifier [Axis]: Activate Holdings (US) Corp. (dba Absolute Software), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[23]     38,649,000    
Ending balance 48,878,000 [15],[20]   48,878,000 [15],[20]   38,649,000 [12],[23]
Investment, Identifier [Axis]: Activate Holdings (US) Corp. (dba Absolute Software), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[16],[23]     527,000    
Ending balance (5,000) [15],[17],[19]   (5,000) [15],[17],[19]   527,000 [12],[16],[23]
Investment, Identifier [Axis]: Aerosmith Bidco Limited (dba Audiotonix), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[24] 98,475,000   98,475,000    
Investment, Identifier [Axis]: Aerosmith Bidco Limited (dba Audiotonix), First lien senior secured multi-currency revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[17],[19] (164,000)   (164,000)    
Investment, Identifier [Axis]: Aerosmith Bidco Limited (dba Audiotonix), First lien senior secured multi-draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[17],[18],[19] (62,000)   (62,000)    
Investment, Identifier [Axis]: Affirm, Inc., Senior convertible notes          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[12],[25]     20,455,000    
Ending balance [5],[12],[25]         20,455,000
Investment, Identifier [Axis]: AlphaSense, Inc., First lien senior secured delayed draw term loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] (64,000)   (64,000)    
Investment, Identifier [Axis]: AlphaSense, Inc., First lien senior secured delayed draw term loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18] 0   0    
Investment, Identifier [Axis]: AlphaSense, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 31,657,000   31,657,000    
Investment, Identifier [Axis]: AlphaSense, LLC, Series E Preferred Shares          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [8] 6,878,000   6,878,000    
Investment, Identifier [Axis]: Amergin Asset Management, LLC, Class A Units          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6],[12]     0    
Ending balance 1,608,000 [7],[8],[15]   1,608,000 [7],[8],[15]   0 [5],[6],[12]
Investment, Identifier [Axis]: AmeriLife Holdings LLC, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[20] 1,733,000   1,733,000    
Investment, Identifier [Axis]: AmeriLife Holdings LLC, First lien senior secured delayed draw term loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23],[27]     3,732,000    
Ending balance [16],[23],[27]         3,732,000
Investment, Identifier [Axis]: AmeriLife Holdings LLC, First lien senior secured delayed draw term loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[28]     0    
Ending balance [16],[27],[28]         0
Investment, Identifier [Axis]: AmeriLife Holdings LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     17,910,000    
Ending balance 25,846,000 [20]   25,846,000 [20]   17,910,000 [29]
Investment, Identifier [Axis]: AmeriLife Holdings LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (11,000)    
Ending balance 0 [17],[19]   0 [17],[19]   (11,000) [16],[28]
Investment, Identifier [Axis]: Anaplan, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     130,890,000    
Ending balance [23]         130,890,000
Investment, Identifier [Axis]: Anaplan, Inc., First lien senior secured loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 130,890,000   130,890,000    
Investment, Identifier [Axis]: Anaplan, Inc., First lien senior secured loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 3,927,000   3,927,000    
Investment, Identifier [Axis]: Anaplan, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     0    
Ending balance 0 [17]   0 [17]   0 [16],[28]
Investment, Identifier [Axis]: Appfire Technologies, LLC, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[28]     0    
Ending balance [16],[27],[28]         0
Investment, Identifier [Axis]: Appfire Technologies, LLC, First lien senior secured delayed draw term loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[20] 1,765,000   1,765,000    
Investment, Identifier [Axis]: Appfire Technologies, LLC, First lien senior secured delayed draw term loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] 0   0    
Investment, Identifier [Axis]: Appfire Technologies, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     3,840,000    
Ending balance 4,079,000 [20]   4,079,000 [20]   3,840,000 [23]
Investment, Identifier [Axis]: Appfire Technologies, LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23]     183,000    
Ending balance 0 [17]   0 [17]   183,000 [16],[23]
Investment, Identifier [Axis]: Aptean Acquiror, Inc. (dba Aptean), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[20] 8,000   8,000    
Investment, Identifier [Axis]: Aptean Acquiror, Inc. (dba Aptean), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 3,074,000   3,074,000    
Investment, Identifier [Axis]: Aptean Acquiror, Inc. (dba Aptean), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (1,000)   (1,000)    
Investment, Identifier [Axis]: Armstrong Bidco Limited (dba The Access Group), First lien senior secured GBP delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[27],[30]     3,508,000    
Ending balance [12],[27],[30]         3,508,000
Investment, Identifier [Axis]: Armstrong Bidco Limited (dba The Access Group), First lien senior secured GBP term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[30]     6,724,000    
Ending balance [12],[30]         6,724,000
Investment, Identifier [Axis]: Armstrong Bidco Limited, First lien senior secured GBP delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[18],[31] 3,700,000   3,700,000    
Investment, Identifier [Axis]: Armstrong Bidco Limited, First lien senior secured GBP term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[31] 7,092,000   7,092,000    
Investment, Identifier [Axis]: Artifact Bidco, Inc. (dba Avetta), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] (11,000)   (11,000)    
Investment, Identifier [Axis]: Artifact Bidco, Inc. (dba Avetta), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 18,504,000   18,504,000    
Investment, Identifier [Axis]: Artifact Bidco, Inc. (dba Avetta), First lien senior secured revolving loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (5,000)   (5,000)    
Investment, Identifier [Axis]: Artifact Bidco, Inc. (dba Avetta), First lien senior secured revolving loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (12,000)   (12,000)    
Investment, Identifier [Axis]: Associations Finance, Inc., Unsecured Notes          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [14] 19,059,000   19,059,000    
Investment, Identifier [Axis]: Associations, Inc., First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] 0   0    
Investment, Identifier [Axis]: Associations, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 49,084,000   49,084,000    
Investment, Identifier [Axis]: Associations, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] 0   0    
Investment, Identifier [Axis]: Asurion, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [25],[29]     18,535,000    
Ending balance 18,189,000 [26],[32]   18,189,000 [26],[32]   18,535,000 [25],[29]
Investment, Identifier [Axis]: Athenahealth Group Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [25],[29]     3,501,000    
Ending balance 3,468,000 [26],[32]   3,468,000 [26],[32]   3,501,000 [25],[29]
Investment, Identifier [Axis]: Aurelia Netherlands Midco 2 B.V., First lien senior secured EUR term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[17],[33] 43,929,000   43,929,000    
Investment, Identifier [Axis]: Avalara, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     104,023,000    
Ending balance 104,545,000 [20]   104,545,000 [20]   104,023,000 [23]
Investment, Identifier [Axis]: Avalara, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (52,000)    
Ending balance 0 [17],[19]   0 [17],[19]   (52,000) [16],[28]
Investment, Identifier [Axis]: Axonius, Inc., Series E Preferred Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6],[21]     8,775,000    
Ending balance 8,142,000 [7],[8],[22]   8,142,000 [7],[8],[22]   8,775,000 [5],[6],[21]
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. (dba Alteryx, Inc.), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[26] 22,451,000   22,451,000    
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. (dba Alteryx, Inc.), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 15,479,000   15,479,000    
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. (dba Alteryx, Inc.), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (71,000)   (71,000)    
Investment, Identifier [Axis]: BCPE Watson (DE) ORML, LP, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[34],[35]     124,375,000    
Ending balance [12],[34],[35]         124,375,000
Investment, Identifier [Axis]: BEHP Co-Investor II, L.P., LP Interest          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6],[12]     1,278,000    
Ending balance 1,297,000 [7],[8],[15]   1,297,000 [7],[8],[15]   1,278,000 [5],[6],[12]
Investment, Identifier [Axis]: BTRS HOLDINGS INC. (dba Billtrust), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[20] 4,604,000   4,604,000    
Investment, Identifier [Axis]: BTRS HOLDINGS INC. (dba Billtrust), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 62,647,000   62,647,000    
Investment, Identifier [Axis]: BTRS HOLDINGS INC. (dba Billtrust), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [19],[20] 2,485,000   2,485,000    
Investment, Identifier [Axis]: BTRS Holdings Inc. (dba Billtrust), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23],[27]     2,527,000    
Ending balance [16],[23],[27]         2,527,000
Investment, Identifier [Axis]: BTRS Holdings Inc. (dba Billtrust), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     62,017,000    
Ending balance [23]         62,017,000
Investment, Identifier [Axis]: BTRS Holdings Inc. (dba Billtrust), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23]     1,578,000    
Ending balance [16],[23]         1,578,000
Investment, Identifier [Axis]: Bamboo US BidCo LLC, First lien senior secured EUR term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [36]     13,128,000    
Ending balance 13,925,000 [37]   13,925,000 [37]   13,128,000 [36]
Investment, Identifier [Axis]: Bamboo US BidCo LLC, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[29]     162,000    
Ending balance 1,487,000 [17],[18],[20]   1,487,000 [17],[18],[20]   162,000 [16],[27],[29]
Investment, Identifier [Axis]: Bamboo US BidCo LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     19,102,000    
Ending balance 20,054,000 [20]   20,054,000 [20]   19,102,000 [23]
Investment, Identifier [Axis]: Bamboo US BidCo LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (123,000)    
Ending balance 0 [17],[19]   0 [17],[19]   (123,000) [16],[28]
Investment, Identifier [Axis]: Barracuda Networks, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23],[25]     43,383,000    
Ending balance 34,771,000 [24],[32]   34,771,000 [24],[32]   43,383,000 [23],[25]
Investment, Identifier [Axis]: Barracuda Networks, Inc., Second lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     52,523,000    
Ending balance 49,924,000 [24],[32]   49,924,000 [24],[32]   52,523,000 [23]
Investment, Identifier [Axis]: Blackhawk Network Holdings, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26],[32] 100,119,000   100,119,000    
Investment, Identifier [Axis]: Blue Owl Credit SLF LLC          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [10]     0    
Gross Additions [1],[10]     2,189,000    
Gross Reductions [3],[10]     0    
Net change in unrealized gain (loss) [10]     (2,000)    
Transfers [10]     0    
Ending balance [10] 2,187,000   2,187,000   0
Interest Income [10]     0    
Dividend income [10]     0    
Other income [10]     0    
Investment, Identifier [Axis]: Blue Owl Credit SLF LLC, LLC Interest          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [8],[15],[17] 2,187,000   2,187,000    
Investment, Identifier [Axis]: Boxer Parent Company Inc. (f/k/a BMC), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20],[32] 19,946,000   19,946,000    
Investment, Identifier [Axis]: Bracket Intermediate Holding Corp., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23],[25]     34,773,000    
Ending balance 34,687,000 [20],[32]   34,687,000 [20],[32]   34,773,000 [23],[25]
Investment, Identifier [Axis]: BridgeBio Pharma, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[20] 29,925,000   29,925,000    
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. (& Smart Holdings Corp.) (dba Datavant), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18] 0   0    
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. (& Smart Holdings Corp.) (dba Datavant), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 97,635,000   97,635,000    
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. (& Smart Holdings Corp.) (dba Datavant), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (48,000)   (48,000)    
Investment, Identifier [Axis]: Certinia, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [35]     43,235,000    
Ending balance 43,897,000 [24]   43,897,000 [24]   43,235,000 [35]
Investment, Identifier [Axis]: Certinia, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (118,000)    
Ending balance (29,000) [17],[19]   (29,000) [17],[19]   (118,000) [16],[28]
Investment, Identifier [Axis]: Circana Group, L.P. (fka The NPD Group, L.P.), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     143,536,000    
Ending balance [29]         143,536,000
Investment, Identifier [Axis]: Circana Group, L.P. (fka The NPD Group, L.P.), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[29]     1,540,000    
Ending balance [16],[29]         1,540,000
Investment, Identifier [Axis]: CloudPay, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[20] 11,205,000   11,205,000    
Investment, Identifier [Axis]: Coherent Group Inc.          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance     16,204,000 0 0
Gross Additions     1,390,000 [1]   1,711,000 [2]
Gross Reductions     (47,000) [3]   0 [4]
Net change in unrealized gain (loss)     (2,319,000)   102,000
Transfers     0   14,391,000
Ending balance 15,228,000   15,228,000   16,204,000
Interest Income     48,000   0
Dividend income     0   0
Other income     0   0
Investment, Identifier [Axis]: Coherent Group Inc., Convertible notes          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[13],[21]     1,700,000    
Ending balance 3,029,000 [15],[22]   3,029,000 [15],[22]   1,700,000 [12],[13],[21]
Investment, Identifier [Axis]: Coherent Group Inc., Series B Preferred Shares          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6],[12],[13],[21]     14,504,000    
Ending balance 12,200,000 [7],[8],[15],[22]   12,200,000 [7],[8],[15],[22]   14,504,000 [5],[6],[12],[13],[21]
Investment, Identifier [Axis]: Color Intermediate, LLC (dba ClaimsXten), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 48,029,000   48,029,000    
Investment, Identifier [Axis]: Color Intermediate, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     47,910,000    
Ending balance [23]         47,910,000
Investment, Identifier [Axis]: Community Brands ParentCo, LLC, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[28]     0    
Ending balance [16],[27],[28]         0
Investment, Identifier [Axis]: Community Brands ParentCo, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     12,402,000    
Ending balance [29]         12,402,000
Investment, Identifier [Axis]: Community Brands ParentCo, LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (8,000)    
Ending balance [16],[28]         (8,000)
Investment, Identifier [Axis]: Computer Services, Inc. (dba CSI), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] 0   0    
Investment, Identifier [Axis]: Computer Services, Inc. (dba CSI), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 150,200,000   150,200,000    
Investment, Identifier [Axis]: Computer Services, Inc. (dba CSI), First lien senior secured loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     124,063,000    
Ending balance [23]         124,063,000
Investment, Identifier [Axis]: Computer Services, Inc. (dba CSI), First lien senior secured loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     20,674,000    
Ending balance [23]         20,674,000
Investment, Identifier [Axis]: ConnectWise, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23],[25]     3,078,000    
Ending balance 3,058,000 [20],[32]   3,058,000 [20],[32]   3,078,000 [23],[25]
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[28]     0    
Ending balance 0 [17],[18],[19]   0 [17],[18],[19]   0 [16],[27],[28]
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     25,503,000    
Ending balance 30,164,000 [26]   30,164,000 [26]   25,503,000 [29]
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (38,000)    
Ending balance 0 [17],[19]   0 [17],[19]   (38,000) [16],[28]
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[28]     (57,000)    
Ending balance 0 [17],[18]   0 [17],[18]   (57,000) [16],[27],[28]
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     83,115,000    
Ending balance 84,599,000 [20]   84,599,000 [20]   83,115,000 [29]
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (116,000)    
Ending balance 0 [17]   0 [17]   (116,000) [16],[28]
Investment, Identifier [Axis]: Covetrus, Inc., Second lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     74,813,000    
Ending balance 71,625,000 [20]   71,625,000 [20]   74,813,000 [23]
Investment, Identifier [Axis]: Cresset Capital Management, LLC, First lien senior secured delayed draw term loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18] 0   0    
Investment, Identifier [Axis]: Cresset Capital Management, LLC, First lien senior secured delayed draw term loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18] 0   0    
Investment, Identifier [Axis]: Cresset Capital Management, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 7,738,000   7,738,000    
Investment, Identifier [Axis]: Cresset Capital Management, LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [19] (11,000)   (11,000)    
Investment, Identifier [Axis]: Crewline Buyer, Inc. (dba New Relic), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 114,518,000   114,518,000    
Investment, Identifier [Axis]: Crewline Buyer, Inc. (dba New Relic), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (30,000)   (30,000)    
Investment, Identifier [Axis]: Crewline Buyer, Inc., First lien senior secured loan, S, 0.0675, 47795, 114805000, 113107000, 113083000, 0.064          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     113,083,000    
Ending balance [23]         113,083,000
Investment, Identifier [Axis]: Crewline Buyer, Inc., First lien senior secured revolving loan, S, 0.0675, 47795, 0, -176000, -179000, 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (179,000)    
Ending balance [16],[28]         (179,000)
Investment, Identifier [Axis]: Delta TopCo, Inc. (dba Infoblox, Inc.), Second lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [22],[24],[32] 16,569,000   16,569,000    
Investment, Identifier [Axis]: Delta TopCo, Inc. (dba Infoblox, Inc.), Second lien senior secured loan, S, 0.0725, 47088, 24464000, 21758000, 24464000, 0.014          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     24,463,000    
Ending balance [23]         24,463,000
Investment, Identifier [Axis]: Diagnostic Services Holdings, Inc. (dba Rayus Radiology), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     9,931,000    
Ending balance 9,931,000 [26]   9,931,000 [26]   9,931,000 [29]
Investment, Identifier [Axis]: Diamond Insure Bidco (dba Acturis), First lien senior secured EUR term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[33] 8,199,000   8,199,000    
Investment, Identifier [Axis]: Diamond Insure Bidco (dba Acturis), First lien senior secured GBP term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[31] 32,210,000   32,210,000    
Investment, Identifier [Axis]: Disco Parent, Inc. (dba Duck Creek Technologies, Inc.), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     36,764,000    
Ending balance 37,137,000 [20]   37,137,000 [20]   36,764,000 [23]
Investment, Identifier [Axis]: Disco Parent, Inc. (dba Duck Creek Technologies, Inc.), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (56,000)    
Ending balance (19,000) [17],[19]   (19,000) [17],[19]   (56,000) [16],[28]
Investment, Identifier [Axis]: Dodge Construction Network LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23],[25]     7,584,000    
Ending balance 7,189,000 [20],[32]   7,189,000 [20],[32]   7,584,000 [23],[25]
Investment, Identifier [Axis]: EET Buyer, Inc. (dba e-Emphasys), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] 0   0    
Investment, Identifier [Axis]: EET Buyer, Inc. (dba e-Emphasys), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     9,602,000    
Ending balance 11,881,000 [20]   11,881,000 [20]   9,602,000 [23]
Investment, Identifier [Axis]: EET Buyer, Inc. (dba e-Emphasys), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[35]     160,000    
Ending balance 0 [17],[19]   0 [17],[19]   160,000 [16],[35]
Investment, Identifier [Axis]: Elliott Alto Co-Investor Aggregator L.P., LP Interest          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6],[12]     13,107,000    
Ending balance 18,244,000 [7],[8],[15]   18,244,000 [7],[8],[15]   13,107,000 [5],[6],[12]
Investment, Identifier [Axis]: Ellucian Holdings Inc. (f/k/a Sophia, L.P.), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26],[32] 9,840,000   9,840,000    
Investment, Identifier [Axis]: Engage Debtco Limited, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[23]     19,776,000    
Ending balance 20,000,000 [15],[20]   20,000,000 [15],[20]   19,776,000 [12],[23]
Investment, Identifier [Axis]: Entrata, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     44,199,000    
Ending balance 44,535,000 [26]   44,535,000 [26]   44,199,000 [29]
Investment, Identifier [Axis]: Entrata, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (77,000)    
Ending balance 0 [17],[19]   0 [17],[19]   (77,000) [16],[28]
Investment, Identifier [Axis]: Fifth Season Investments LLC          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance     43,908,000 25,110,000 25,110,000
Gross Additions     31,891,000 [1]   18,794,000 [2]
Gross Reductions     (1,471,000) [3]   0 [4]
Net change in unrealized gain (loss)     4,891,000   4,000
Transfers     0   0
Ending balance 79,219,000   79,219,000   43,908,000
Interest Income     0   0
Dividend income     4,415,000   1,390,000
Other income     0   0
Investment, Identifier [Axis]: Fifth Season Investments LLC, Class A Units          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [6],[13],[34]     43,908,000    
Ending balance 79,219,000 [8],[38]   79,219,000 [8],[38]   43,908,000 [6],[13],[34]
Investment, Identifier [Axis]: Finastra USA, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[35]     81,558,000    
Ending balance 81,970,000 [15],[20]   81,970,000 [15],[20]   81,558,000 [12],[35]
Investment, Identifier [Axis]: Finastra USA, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[16],[29]     2,176,000    
Ending balance 3,958,000 [15],[17],[20]   3,958,000 [15],[17],[20]   2,176,000 [12],[16],[29]
Investment, Identifier [Axis]: Forescout Technologies, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 1,228,000   1,228,000    
Investment, Identifier [Axis]: Forescout Technologies, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17] 0   0    
Investment, Identifier [Axis]: Fortra, LLC (f/k/a Help/Systems Holdings, Inc.), Second lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 17,950,000   17,950,000    
Investment, Identifier [Axis]: Fortra, LLC (f/k/a Help/Systems Holdings, Inc.), Second lien senior secured loan, S, 0.0675, 46710, 20000000, 19803000, 17350000, 0.01          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     17,350,000    
Ending balance [23]         17,350,000
Investment, Identifier [Axis]: Foundation Consumer Brands, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     17,567,000    
Ending balance 16,822,000 [20]   16,822,000 [20]   17,567,000 [23]
Investment, Identifier [Axis]: Fullsteam Operations, LLC, First lien senior secured delayed draw term loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23],[27]     944,000    
Ending balance 3,168,000 [17],[18],[20]   3,168,000 [17],[18],[20]   944,000 [16],[23],[27]
Investment, Identifier [Axis]: Fullsteam Operations, LLC, First lien senior secured delayed draw term loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[28]     (22,000)    
Ending balance 1,368,000 [17],[18],[20]   1,368,000 [17],[18],[20]   (22,000) [16],[27],[28]
Investment, Identifier [Axis]: Fullsteam Operations, LLC, First lien senior secured delayed draw term loan 3          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] (19,000)   (19,000)    
Investment, Identifier [Axis]: Fullsteam Operations, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     10,275,000    
Ending balance 10,593,000 [20]   10,593,000 [20]   10,275,000 [23]
Investment, Identifier [Axis]: Fullsteam Operations, LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (18,000)    
Ending balance 0 [17],[19]   0 [17],[19]   (18,000) [16],[28]
Investment, Identifier [Axis]: Galway Borrower LLC, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18] 0   0    
Investment, Identifier [Axis]: Galway Borrower LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[20] 51,000   51,000    
Investment, Identifier [Axis]: Gerson Lehrman Group, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 18,848,000   18,848,000    
Investment, Identifier [Axis]: Gerson Lehrman Group, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (2,000)   (2,000)    
Investment, Identifier [Axis]: Granicus, Inc., First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[26] 287,000   287,000    
Investment, Identifier [Axis]: Granicus, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 1,954,000   1,954,000    
Investment, Identifier [Axis]: Granicus, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] 0   0    
Investment, Identifier [Axis]: Grayshift, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[29]     111,237,000    
Ending balance [12],[29]         111,237,000
Investment, Identifier [Axis]: Grayshift, LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[16],[28]     (87,000)    
Ending balance [12],[16],[28]         (87,000)
Investment, Identifier [Axis]: Greenway Health, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [35]     9,991,000    
Ending balance 10,069,000 [24]   10,069,000 [24]   9,991,000 [35]
Investment, Identifier [Axis]: Halo Parent Newco, LLC, Class H PIK Preferred Equity          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [6],[11]     38,202,000    
Ending balance 40,540,000 [8],[14]   40,540,000 [8],[14]   38,202,000 [6],[11]
Investment, Identifier [Axis]: Hg Genesis 9 SumoCo Limited, Unsecured EUR facility          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[36]     51,668,000    
Ending balance 56,658,000 [15],[37]   56,658,000 [15],[37]   51,668,000 [12],[36]
Investment, Identifier [Axis]: Hyland Software, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     64,456,000    
Ending balance 64,622,000 [26]   64,622,000 [26]   64,456,000 [29]
Investment, Identifier [Axis]: Hyland Software, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (47,000)    
Ending balance (16,000) [17],[19]   (16,000) [17],[19]   (47,000) [16],[28]
Investment, Identifier [Axis]: IRI Group Holdings, Inc. (f/k/a Circana Group, L.P. (f/k/a The NPD Group, L.P.)), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 146,117,000   146,117,000    
Investment, Identifier [Axis]: IRI Group Holdings, Inc. (f/k/a Circana Group, L.P. (f/k/a The NPD Group, L.P.)), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[26] 5,074,000   5,074,000    
Investment, Identifier [Axis]: Icefall Parent, Inc. (dba EngageSmart), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 18,170,000   18,170,000    
Investment, Identifier [Axis]: Icefall Parent, Inc. (dba EngageSmart), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (9,000)   (9,000)    
Investment, Identifier [Axis]: Iconic IMO Merger Sub, Inc., First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[35]     1,816,000    
Ending balance [16],[27],[35]         1,816,000
Investment, Identifier [Axis]: Iconic IMO Merger Sub, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     20,482,000    
Ending balance 22,982,000   22,982,000   20,482,000 [23]
Investment, Identifier [Axis]: Iconic IMO Merger Sub, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23]     87,000    
Ending balance (6,000) [17],[19]   (6,000) [17],[19]   87,000 [16],[23]
Investment, Identifier [Axis]: Imprivata, Inc., Second lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     17,647,000    
Ending balance [23]         17,647,000
Investment, Identifier [Axis]: Indikami Bidco, LLC (dba IntegriChain), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[28]     (62,000)    
Ending balance 0 [17],[18],[19]   0 [17],[18],[19]   (62,000) [16],[27],[28]
Investment, Identifier [Axis]: Indikami Bidco, LLC (dba IntegriChain), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     55,106,000    
Ending balance 70,343,000 [26]   70,343,000 [26]   55,106,000 [29]
Investment, Identifier [Axis]: Indikami Bidco, LLC (dba IntegriChain), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (159,000)    
Ending balance 2,431,000 [17],[26]   2,431,000 [17],[26]   (159,000) [16],[28]
Investment, Identifier [Axis]: Innovation Ventures HoldCo, LLC (dba 5 Hour Energy), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 7,584,000   7,584,000    
Investment, Identifier [Axis]: Innovation Ventures HoldCo, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     9,875,000    
Ending balance [29]         9,875,000
Investment, Identifier [Axis]: Integrated Specialty Coverages, LLC, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[28]     (3,000)    
Ending balance 0 [17],[18],[19]   0 [17],[18],[19]   (3,000) [16],[27],[28]
Investment, Identifier [Axis]: Integrated Specialty Coverages, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     5,519,000    
Ending balance 6,671,000 [24]   6,671,000 [24]   5,519,000 [23]
Investment, Identifier [Axis]: Integrated Specialty Coverages, LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (9,000)    
Ending balance 0 [17],[19]   0 [17],[19]   (9,000) [16],[28]
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23],[27]     796,000    
Ending balance (16,000) [17],[18],[19]   (16,000) [17],[18],[19]   796,000 [16],[23],[27]
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     30,678,000    
Ending balance 36,382,000 [20]   36,382,000 [20]   30,678,000 [23]
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     0    
Ending balance (5,000) [17],[19]   (5,000) [17],[19]   0 [16],[28]
Investment, Identifier [Axis]: Interoperability Bidco, Inc. (dba Lyniate), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] (29,000)   (29,000)    
Investment, Identifier [Axis]: Interoperability Bidco, Inc. (dba Lyniate), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     27,771,000    
Ending balance 28,644,000 [26]   28,644,000 [26]   27,771,000 [23]
Investment, Identifier [Axis]: Interoperability Bidco, Inc. (dba Lyniate), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23]     914,000    
Ending balance 670,000 [19],[20]   670,000 [19],[20]   914,000 [16],[23]
Investment, Identifier [Axis]: JS PARENT, INC. (dba Jama Software), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 13,608,000   13,608,000    
Investment, Identifier [Axis]: JS PARENT, INC. (dba Jama Software), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (7,000)   (7,000)    
Investment, Identifier [Axis]: Juniper Square, Inc., First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [18],[20] 623,000   623,000    
Investment, Identifier [Axis]: Juniper Square, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     36,636,000    
Ending balance 39,144,000 [20]   39,144,000 [20]   36,636,000 [23]
Investment, Identifier [Axis]: Juniper Square, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (45,000)    
Ending balance (23,000) [17],[19]   (23,000) [17],[19]   (45,000) [16],[28]
Investment, Identifier [Axis]: Juniper Square, Inc., Warrants          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6]     214,000    
Ending balance 229,000 [7],[8]   229,000 [7],[8]   214,000 [5],[6]
Investment, Identifier [Axis]: KWOL Acquisition Inc. (dba Worldwide Clinical Trials), Class A Interest          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [7],[8] 1,585,000   1,585,000    
Investment, Identifier [Axis]: KWOL Acquisition Inc. (dba Worldwide Clinical Trials), Common stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6],[27]     1,585,000    
Ending balance [5],[6],[27]         1,585,000
Investment, Identifier [Axis]: KWOL Acquisition Inc. (dba Worldwide Clinical Trials), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [35]     21,206,000    
Ending balance 21,419,000 [24]   21,419,000 [24]   21,206,000 [35]
Investment, Identifier [Axis]: KWOL Acquisition Inc. (dba Worldwide Clinical Trials), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[35]     823,000    
Ending balance 352,000 [17],[20]   352,000 [17],[20]   823,000 [16],[35]
Investment, Identifier [Axis]: Kaseya Inc., First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23],[27]     290,000    
Ending balance 921,000 [17],[18],[20]   921,000 [17],[18],[20]   290,000 [16],[23],[27]
Investment, Identifier [Axis]: Kaseya Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     78,521,000    
Ending balance 79,813,000 [20]   79,813,000 [20]   78,521,000 [23]
Investment, Identifier [Axis]: Kaseya Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[29]     1,182,000    
Ending balance 1,194,000 [17],[26]   1,194,000 [17],[26]   1,182,000 [16],[29]
Investment, Identifier [Axis]: Klarna Holding AB, Subordinated Floating Rate Notes          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[20],[22] 32,667,000   32,667,000    
Investment, Identifier [Axis]: Knockout Intermediate Holdings I Inc. (dba Kaseya Inc.), Perpetual Preferred Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [6],[11]     70,035,000    
Ending balance 80,264,000 [8],[24]   80,264,000 [8],[24]   70,035,000 [6],[11]
Investment, Identifier [Axis]: LSI Financing 1 DAC          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance     19,988,000 $ 6,175,000 6,175,000
Gross Additions     4,954,000 [1]   14,694,000 [2]
Gross Reductions     (2,927,000) [3]   (1,914,000) [4]
Net change in unrealized gain (loss)     733,000   1,033,000
Transfers     0   0
Ending balance 22,748,000   22,748,000   19,988,000
Interest Income     0   0
Dividend income     74,000   251,000
Other income     0   0
Investment, Identifier [Axis]: LSI Financing 1 DAC, Preferred Equity          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [6],[12],[13]     19,988,000    
Ending balance 22,748,000 [8],[15]   22,748,000 [8],[15]   19,988,000 [6],[12],[13]
Investment, Identifier [Axis]: Litera Bidco LLC, First lien senior secured delayed draw term loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[26] 4,627,000   4,627,000    
Investment, Identifier [Axis]: Litera Bidco LLC, First lien senior secured delayed draw term loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18] 0   0    
Investment, Identifier [Axis]: Litera Bidco LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 35,351,000   35,351,000    
Investment, Identifier [Axis]: Litera Bidco LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (12,000)   (12,000)    
Investment, Identifier [Axis]: Magnet Forensics, LLC (f/k/a Grayshift, LLC), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[26] 149,422,000   149,422,000    
Investment, Identifier [Axis]: Magnet Forensics, LLC (f/k/a Grayshift, LLC), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[17],[19] 0   0    
Investment, Identifier [Axis]: ManTech International Corporation, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23],[27]     5,625,000    
Ending balance 0 [17],[18]   0 [17],[18]   5,625,000 [16],[23],[27]
Investment, Identifier [Axis]: ManTech International Corporation, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     66,351,000    
Ending balance 70,051,000 [20]   70,051,000 [20]   66,351,000 [23]
Investment, Identifier [Axis]: ManTech International Corporation, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (65,000)    
Ending balance 0 [17]   0 [17]   (65,000) [16],[28]
Investment, Identifier [Axis]: Minerva Holdco, Inc. (dba Athenahealth, Inc.), Series A Preferred Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [8],[14] 64,008,000   64,008,000    
Investment, Identifier [Axis]: Minerva Holdco, Inc., Series A Preferred Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6]     57,797,000    
Ending balance [5],[6]         57,797,000
Investment, Identifier [Axis]: Minotaur Acquisition, Inc. (dba Inspira Financial), First lien senior secured delayed draw term loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[26] 11,894,000   11,894,000    
Investment, Identifier [Axis]: Minotaur Acquisition, Inc. (dba Inspira Financial), First lien senior secured delayed draw term loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] (60,000)   (60,000)    
Investment, Identifier [Axis]: Minotaur Acquisition, Inc. (dba Inspira Financial), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 71,724,000   71,724,000    
Investment, Identifier [Axis]: Minotaur Acquisition, Inc. (dba Inspira Financial), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (74,000)   (74,000)    
Investment, Identifier [Axis]: Monotype Imaging Holdings Inc., First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] 0   0    
Investment, Identifier [Axis]: Monotype Imaging Holdings Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 68,388,000   68,388,000    
Investment, Identifier [Axis]: Monotype Imaging Holdings Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (43,000)   (43,000)    
Investment, Identifier [Axis]: Natural Partners, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[23]     9,105,000    
Ending balance 9,035,000 [15],[20]   9,035,000 [15],[20]   9,105,000 [12],[23]
Investment, Identifier [Axis]: Natural Partners, LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[16],[28]     (3,000)    
Ending balance (3,000) [15],[17],[19]   (3,000) [15],[17],[19]   (3,000) [12],[16],[28]
Investment, Identifier [Axis]: Neptune Holdings, Inc. (dba NexTech), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [35]     6,452,000    
Ending balance 6,535,000 [26]   6,535,000 [26]   6,452,000 [35]
Investment, Identifier [Axis]: Neptune Holdings, Inc. (dba NexTech), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (22,000)    
Ending balance (4,000) [17],[19]   (4,000) [17],[19]   (22,000) [16],[28]
Investment, Identifier [Axis]: OneOncology LLC, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[28]     0    
Ending balance [16],[27],[28]         0
Investment, Identifier [Axis]: OneOncology LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     7,877,000    
Ending balance [23]         7,877,000
Investment, Identifier [Axis]: OneOncology LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (8,000)    
Ending balance [16],[28]         (8,000)
Investment, Identifier [Axis]: OneOncology, LLC, First lien senior secured delayed draw term loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[20] 2,969,000   2,969,000    
Investment, Identifier [Axis]: OneOncology, LLC, First lien senior secured delayed draw term loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[20] 3,874,000   3,874,000    
Investment, Identifier [Axis]: OneOncology, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 7,857,000   7,857,000    
Investment, Identifier [Axis]: OneOncology, LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] 0   0    
Investment, Identifier [Axis]: Orange Blossom Parent, Inc., Common Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6]     1,664,000    
Ending balance 1,664,000 [7],[8]   1,664,000 [7],[8]   1,664,000 [5],[6]
Investment, Identifier [Axis]: Oranje Holdco, Inc. (dba KnowBe4), First lien senior secured loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 106,818,000   106,818,000    
Investment, Identifier [Axis]: Oranje Holdco, Inc. (dba KnowBe4), First lien senior secured loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 21,062,000   21,062,000    
Investment, Identifier [Axis]: Oranje Holdco, Inc. (dba KnowBe4), First lien senior secured loan, S, 0.075, 47150, 106818000, 105334000, 105750000, 0.059          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     105,750,000    
Ending balance [23]         105,750,000
Investment, Identifier [Axis]: Oranje Holdco, Inc. (dba KnowBe4), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] 0   0    
Investment, Identifier [Axis]: Oranje Holdco, Inc. (dba KnowBe4), First lien senior secured revolving loan, S, 0.0775, 47150, 0, -170000, -134000, 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (134,000)    
Ending balance [16],[28]         (134,000)
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] (15,000)   (15,000)    
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 13,063,000   13,063,000    
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (13,000)   (13,000)    
Investment, Identifier [Axis]: Pacific BidCo Inc., First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[16],[27],[28]     0    
Ending balance 947,000 [15],[17],[18],[24]   947,000 [15],[17],[18],[24]   0 [12],[16],[27],[28]
Investment, Identifier [Axis]: Pacific BidCo Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[35]     8,646,000    
Ending balance 8,827,000 [15],[24]   8,827,000 [15],[24]   8,646,000 [12],[35]
Investment, Identifier [Axis]: PerkinElmer U.S. LLC, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[26] 8,572,000   8,572,000    
Investment, Identifier [Axis]: PerkinElmer U.S. LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     45,441,000    
Ending balance 56,091,000 [26]   56,091,000 [26]   45,441,000 [29]
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[28]     (3,000)    
Ending balance (51,000) [17],[18],[19]   (51,000) [17],[18],[19]   (3,000) [16],[27],[28]
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     38,838,000    
Ending balance 38,177,000 [26]   38,177,000 [26]   38,838,000 [29]
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (56,000)    
Ending balance (107,000) [17],[19]   (107,000) [17],[19]   (56,000) [16],[28]
Investment, Identifier [Axis]: Phantom Purchaser, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 8,820,000   8,820,000    
Investment, Identifier [Axis]: Phantom Purchaser, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (11,000)   (11,000)    
Investment, Identifier [Axis]: Picard Holdco, Inc., Series A Preferred Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [6],[23]     102,546,000    
Ending balance 9,159,000 [7],[8],[15]   9,159,000 [7],[8],[15]   102,546,000 [6],[23]
Investment, Identifier [Axis]: Ping Identity Holding Corp., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 94,156,000   94,156,000    
Investment, Identifier [Axis]: Ping Identity Holding Corp., First lien senior secured loan, S, 0.07, 47408, 90909000, 89723000, 90455000, 0.051          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     90,455,000    
Ending balance [29]         90,455,000
Investment, Identifier [Axis]: Ping Identity Holding Corp., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] 0   0    
Investment, Identifier [Axis]: Ping Identity Holding Corp., First lien senior secured revolving loan, S, 0.07, 47043, 0, -109000, -45000, 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (45,000)    
Ending balance [16],[28]         (45,000)
Investment, Identifier [Axis]: PointClickCare Technologies, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[23]     9,825,000    
Ending balance 9,751,000 [15],[20]   9,751,000 [15],[20]   9,825,000 [12],[23]
Investment, Identifier [Axis]: Project Alpine Co-Invest Fund, LP, LP Interest          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6],[12]     11,450,000    
Ending balance 11,449,000 [7],[8],[15]   11,449,000 [7],[8],[15]   11,450,000 [5],[6],[12]
Investment, Identifier [Axis]: Project Hotel California Co-Invest Fund, L.P., LP Interest          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6],[12]     9,134,000    
Ending balance 20,000,000 [7],[8]   20,000,000 [7],[8]   9,134,000 [5],[6],[12]
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp. (dba Wellsky), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [25],[29]     11,727,000    
Ending balance 11,631,000 [26],[32]   11,631,000 [26],[32]   11,727,000 [25],[29]
Investment, Identifier [Axis]: Proofpoint, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [25],[29]     3,196,000    
Ending balance 3,173,000 [26],[32]   3,173,000 [26],[32]   3,196,000 [25],[29]
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC, First lien senior secured delayed draw term loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[20] 760,000   760,000    
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC, First lien senior secured delayed draw term loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] (17,000)   (17,000)    
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 14,067,000   14,067,000    
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[20] 327,000   327,000    
Investment, Identifier [Axis]: Quartz Acquireco, LLC (dba Qualtrics), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     4,950,000    
Ending balance [29]         4,950,000
Investment, Identifier [Axis]: RL Datix Holdings (USA), Inc. (dba Datix Bidco Limited), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 30,376,000   30,376,000    
Investment, Identifier [Axis]: RL Datix Holdings (USA), Inc., First lien senior secured GBP term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [31] 34,533,000   34,533,000    
Investment, Identifier [Axis]: RL Datix Holdings (USA), Inc., First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18] 0   0    
Investment, Identifier [Axis]: RL Datix Holdings (USA), Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 55,593,000   55,593,000    
Investment, Identifier [Axis]: RL Datix Holdings (USA), Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (111,000)   (111,000)    
Investment, Identifier [Axis]: Relativity ODA LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 44,927,000   44,927,000    
Investment, Identifier [Axis]: Relativity ODA LLC, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (16,000)   (16,000)    
Investment, Identifier [Axis]: Romulus Intermediate Holdings 1 Inc. (dba PetVet Care Centers), Series A Preferred Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [6],[11]     4,331,000    
Ending balance [6],[11]         4,331,000
Investment, Identifier [Axis]: Romulus Intermediate Holdings 1 Inc. (dba PetVet Care Centers), Series A Preferred Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [8],[14] 4,799,000   4,799,000    
Investment, Identifier [Axis]: Rubrik, Inc., First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[20] 5,366,000   5,366,000    
Investment, Identifier [Axis]: Rubrik, Inc., First lien senior secured delayed draw term loan, S, 0.07, 46982, 660000, 600000, 595000, 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23]     595,000    
Ending balance [16],[23]         595,000
Investment, Identifier [Axis]: Rubrik, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 46,771,000   46,771,000    
Investment, Identifier [Axis]: Rubrik, Inc., First lien senior secured loan, S, 0.07, 46982, 46771000, 46190000, 46303000, 0.026          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     46,303,000    
Ending balance [23]         46,303,000
Investment, Identifier [Axis]: SailPoint Technologies Holdings, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 136,578,000   136,578,000    
Investment, Identifier [Axis]: SailPoint Technologies Holdings, Inc., First lien senior secured loan, S, 0.06, 47346, 136920000, 134464000, 135893000, 0.076          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     135,893,000    
Ending balance [29]         135,893,000
Investment, Identifier [Axis]: SailPoint Technologies Holdings, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (33,000)   (33,000)    
Investment, Identifier [Axis]: SailPoint Technologies Holdings, Inc., First lien senior secured revolving loan, S, 0.0625, 46981, 0, -201000, -98000, 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (98,000)    
Ending balance [16],[28]         (98,000)
Investment, Identifier [Axis]: Salinger Bidco Inc. (dba Surgical Information Systems), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] (48,000)   (48,000)    
Investment, Identifier [Axis]: Salinger Bidco Inc. (dba Surgical Information Systems), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 66,026,000   66,026,000    
Investment, Identifier [Axis]: Salinger Bidco Inc. (dba Surgical Information Systems), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[19] (116,000)   (116,000)    
Investment, Identifier [Axis]: Securiti, Inc., Series C Preferred Shares          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6]     18,596,000    
Ending balance [5],[6]         18,596,000
Investment, Identifier [Axis]: Securonix, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     18,538,000    
Ending balance 17,401,000 [20]   17,401,000 [20]   18,538,000 [23]
Investment, Identifier [Axis]: Securonix, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (222,000)    
Ending balance (347,000) [17],[19],[20]   (347,000) [17],[19],[20]   (222,000) [16],[28]
Investment, Identifier [Axis]: Sensor Technology Topco, Inc. (dba Humanetics), First lien senior secured EUR delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[37] 0   0    
Investment, Identifier [Axis]: Sensor Technology Topco, Inc. (dba Humanetics), First lien senior secured EUR term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [36]     12,471,000    
Ending balance 12,939,000 [37]   12,939,000 [37]   12,471,000 [36]
Investment, Identifier [Axis]: Sensor Technology Topco, Inc. (dba Humanetics), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18] 0   0    
Investment, Identifier [Axis]: Sensor Technology Topco, Inc. (dba Humanetics), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     62,634,000    
Ending balance 64,184,000 [20]   64,184,000 [20]   62,634,000 [23]
Investment, Identifier [Axis]: Sensor Technology Topco, Inc. (dba Humanetics), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23]     3,080,000    
Ending balance 3,230,000 [17],[26]   3,230,000 [17],[26]   3,080,000 [16],[23]
Investment, Identifier [Axis]: Simpler Postage, Inc. (dba Easypost), First lien senior secured delayed draw term loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18],[19] (57,000)   (57,000)    
Investment, Identifier [Axis]: Simpler Postage, Inc. (dba Easypost), First lien senior secured delayed draw term loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [17],[18] 0   0    
Investment, Identifier [Axis]: Simpler Postage, Inc. (dba Easypost), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26] 41,109,000   41,109,000    
Investment, Identifier [Axis]: Simpler Postage, Inc. (dba Easypost), Warrants          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [8] 1,904,000   1,904,000    
Investment, Identifier [Axis]: SimpliSafe Holding Corporation, First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[29]     676,000    
Ending balance [16],[27],[29]         676,000
Investment, Identifier [Axis]: SimpliSafe Holding Corporation, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [29]     20,065,000    
Ending balance 22,672,000 [26]   22,672,000 [26]   20,065,000 [29]
Investment, Identifier [Axis]: Sitecore Holding III A/S, First lien senior secured EUR term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [36]     67,472,000    
Ending balance 70,867,000 [33]   70,867,000 [33]   67,472,000 [36]
Investment, Identifier [Axis]: Sitecore Holding III A/S, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [35]     10,396,000    
Ending balance 10,849,000 [20]   10,849,000 [20]   10,396,000 [35]
Investment, Identifier [Axis]: Sitecore USA, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [35]     62,677,000    
Ending balance 65,407,000 [20]   65,407,000 [20]   62,677,000 [35]
Investment, Identifier [Axis]: Smarsh Inc., First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[23],[27]     3,230,000    
Ending balance 3,238,000 [17],[18],[20]   3,238,000 [17],[18],[20]   3,230,000 [16],[23],[27]
Investment, Identifier [Axis]: Smarsh Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     25,840,000    
Ending balance 25,905,000 [20]   25,905,000 [20]   25,840,000 [23]
Investment, Identifier [Axis]: Smarsh Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (1,000)    
Ending balance 0 [17],[19]   0 [17],[19]   (1,000) [16],[28]
Investment, Identifier [Axis]: Sophia, L.P., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [25],[29]     9,826,000    
Ending balance [25],[29]         9,826,000
Investment, Identifier [Axis]: Sophos Holdings, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[25],[29]     14,790,000    
Ending balance 14,681,000 [15],[26],[32]   14,681,000 [15],[26],[32]   14,790,000 [12],[25],[29]
Investment, Identifier [Axis]: Sovos Compliance, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [25],[29]     19,283,000    
Ending balance 19,374,000 [26],[32]   19,374,000 [26],[32]   19,283,000 [25],[29]
Investment, Identifier [Axis]: Storable, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [26],[32] 4,983,000   4,983,000    
Investment, Identifier [Axis]: TC Holdings, LLC (dba TrialCard), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     8,795,000    
Ending balance 38,511,000 [20]   38,511,000 [20]   8,795,000 [23]
Investment, Identifier [Axis]: TC Holdings, LLC (dba TrialCard), First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     0    
Ending balance 0 [17],[19]   0 [17],[19]   0 [16],[28]
Investment, Identifier [Axis]: TG THERAPEUTICS, INC., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[20] 12,406,000   12,406,000    
Investment, Identifier [Axis]: TK Operations Ltd (dba Travelperk, Inc.), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [14],[15] 23,145,000   23,145,000    
Investment, Identifier [Axis]: Talon MidCo 2 Limited (dba Tufin), First lien senior secured delayed draw term loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[16],[27],[28]     (2,000)    
Ending balance [12],[16],[27],[28]         (2,000)
Investment, Identifier [Axis]: Talon MidCo 2 Limited (dba Tufin), First lien senior secured delayed draw term loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[16],[28]     (17,000)    
Ending balance [12],[16],[28]         (17,000)
Investment, Identifier [Axis]: Talon MidCo 2 Limited (dba Tufin), First lien senior secured loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[23]     28,064,000    
Ending balance [12],[23]         28,064,000
Investment, Identifier [Axis]: Talon MidCo 2 Limited (dba Tufin), First lien senior secured loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[23]     2,032,000    
Ending balance [12],[23]         2,032,000
Investment, Identifier [Axis]: Talon MidCo 2 Limited, First lien senior secured loan 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[26] 28,958,000   28,958,000    
Investment, Identifier [Axis]: Talon MidCo 2 Limited, First lien senior secured loan 2          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[26] 2,097,000   2,097,000    
Investment, Identifier [Axis]: Talon MidCo 2 Limited, First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[17],[19] 0   0    
Investment, Identifier [Axis]: TravelPerk, Inc. Warrants          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [8],[15] 1,650,000   1,650,000    
Investment, Identifier [Axis]: TravelPerk, Inc., Warrants          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [8],[14],[15] 9,432,000   9,432,000    
Investment, Identifier [Axis]: Vermont Aus Pty Ltd, First lien senior secured AUD term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [15],[39] 9,775,000   9,775,000    
Investment, Identifier [Axis]: Vermont Aus Pty Ltd, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [12],[23]     9,727,000    
Ending balance [12],[23]         9,727,000
Investment, Identifier [Axis]: Vestwell Holdings, Inc. Series D Preferred Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [7],[8] 3,000,000   3,000,000    
Investment, Identifier [Axis]: Vestwell Holdings, Inc., Series D Preferred Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6]     3,000,000    
Ending balance [5],[6]         3,000,000
Investment, Identifier [Axis]: WP Irving Co-Invest, L.P., Partnership Units          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6],[12]     1,258,000    
Ending balance 1,276,000 [7],[8],[15]   1,276,000 [7],[8],[15]   1,258,000 [5],[6],[12]
Investment, Identifier [Axis]: XOMA Corporation, Warrants          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [7],[8] 147,000   147,000    
Investment, Identifier [Axis]: XOMA Corporation, Warrants 1          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6]     82,000    
Ending balance [5],[6]         82,000
Investment, Identifier [Axis]: XPLOR T1, LLC, First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [20] 5,025,000   5,025,000    
Investment, Identifier [Axis]: XRL 1 LLC (dba XOMA), First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [11],[16],[28]     (23,000)    
Ending balance (15,000) [14],[17],[18],[19]   (15,000) [14],[17],[18],[19]   (23,000) [11],[16],[28]
Investment, Identifier [Axis]: XRL 1 LLC (dba XOMA), First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [11]     12,708,000    
Ending balance 12,125,000 [14]   12,125,000 [14]   12,708,000 [11]
Investment, Identifier [Axis]: Zendesk, Inc., First lien senior secured delayed draw term loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[27],[28]     (57,000)    
Ending balance 0 [17],[18],[19]   0 [17],[18],[19]   (57,000) [16],[27],[28]
Investment, Identifier [Axis]: Zendesk, Inc., First lien senior secured loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [23]     92,871,000    
Ending balance 94,047,000 [20]   94,047,000 [20]   92,871,000 [23]
Investment, Identifier [Axis]: Zendesk, Inc., First lien senior secured revolving loan          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [16],[28]     (118,000)    
Ending balance 0 [17],[19]   0 [17],[19]   (118,000) [16],[28]
Investment, Identifier [Axis]: Zoro TopCo, Inc., Series A Preferred Equity          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Ending balance [8],[14] 15,856,000   15,856,000    
Investment, Identifier [Axis]: Zoro TopCo, Inc., Series A Preferred Stock          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [6],[11]     13,818,000    
Ending balance [6],[11]         13,818,000
Investment, Identifier [Axis]: Zoro TopCo, L.P., Class A Common Units          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]          
Beginning balance [5],[6]     11,447,000    
Ending balance $ 11,447,000 [7],[8]   $ 11,447,000 [7],[8]   $ 11,447,000 [5],[6]
[1] Gross additions include increases in the cost basis of investments resulting from new investments, payment-in-kind interest (“PIK”) or dividends, and the amortization of any unearned income or discounts on equity investments, as applicable.
[2] Gross additions include increases in the cost basis of investments resulting from new investments, payment-in-kind interest or dividends, and the amortization of any unearned income or discounts on equity investments, as applicable.
[3] Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, and the amortization of any premiums on equity investments, as applicable.
[4] Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, and the amortization of any premiums on equity investments, as applicable.
[5] Investment is non-income producing.
[6] Security acquired in transaction exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), and may be deemed to be “restricted securities” under the Securities Act. As of December 31, 2023, the aggregate fair value of these securities is $478.6 million or 26.3% of the Company’s net assets. The acquisition dates of the restricted securities are as follows:
Portfolio CompanyInvestmentAcquisition Date
6Sense Insights, Inc.Series E-1 Preferred StockJanuary 20, 2022
AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLCLLC InterestJuly 01, 2022
AAM Series 2.1 Aviation Feeder, LLCLLC InterestJuly 01, 2022
Accelerate Topco Holdings, LLCCommon UnitsSeptember 01, 2022
Acorns Grow IncorporatedSeries F Preferred StockMarch 08, 2022
Amergin Asset Management, LLCClass A UnitsJuly 01, 2022
Axonius, Inc.Series E Preferred StockMarch 11, 2022
BEHP Co-Investor II, L.P.LP InterestMay 06, 2022
Coherent Group Inc.Series B Preferred SharesApril 21, 2022
Coherent Group Inc.Series B Preferred SharesDecember 28, 2023
Elliott Alto Co-Investor Aggregator L.P.LP InterestSeptember 28, 2022
Fifth Season Investments LLCClass A UnitsOctober 17, 2022
Halo Parent Newco, LLCClass H PIK Preferred EquityFebruary 22, 2022
Juniper Square, Inc.WarrantsDecember 29, 2022
Knockout Intermediate Holdings I Inc. (dba Kaseya Inc.)Perpetual Preferred StockJune 23, 2022
LSI Financing 1 DACPreferred EquityDecember 14, 2022
Minerva Holdco, Inc.Series A Preferred StockFebruary 15, 2022
Orange Blossom Parent, Inc.Common StockJuly 29, 2022
Picard Holdco, Inc.Series A Preferred StockSeptember 29, 2022
Project Alpine Co-Invest Fund, L.P.LP InterestJune 13, 2022
Project Hotel California Co-Invest Fund, L.P.LP InterestAugust 09, 2022
Romulus Intermediate Holdings 1 Inc. (dba PetVet Care Centers)Series A Preferred StockNovember 15, 2023
Securiti, Inc.Series C Preferred SharesJuly 29, 2022
Vestwell Holdings, Inc.Series D Preferred StockDecember 20, 2023
KWOL Acquisition Inc. (dba Worldwide Clinical Trials)Class A InterestNovember 30, 2023
WP Irving Co-Invest, L.P.Partnership UnitsMay 18, 2022
XOMA CorporationWarrantsDecember 15, 2023
Zoro TopCo, L.P.Class A Common UnitsNovember 22, 2022
Zoro TopCo, Inc.Series A Preferred StockNovember 22, 2022
_______________
[7] Investment is non-income producing.
[8] Security acquired in transaction exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), and may be deemed to be “restricted securities” under the Securities Act. As of September 30, 2024, the aggregate fair value of these securities is $456.7 million or 16.6% of the Company’s net assets. The acquisition dates of the restricted securities are as follows:
Portfolio CompanyInvestmentAcquisition Date
6Sense Insights, Inc.Series E-1 Preferred StockJanuary 20, 2022
AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLCLLC InterestJuly 01, 2022
AAM Series 2.1 Aviation Feeder, LLCLLC InterestJuly 01, 2022
Accelerate Topco Holdings, LLCCommon UnitsSeptember 01, 2022
Acorns Grow IncorporatedSeries F Preferred StockMarch 08, 2022
Amergin Asset Management, LLCClass A UnitsJuly 01, 2022
AlphaSense, LLCSeries E Preferred SharesJune 27, 2024
Axonius, Inc.Series E Preferred StockMarch 11, 2022
Blue Owl Credit SLF LLCLLC InterestAugust 01, 2024
CloudPay, Inc.Series E Preferred StockJuly 30, 2024
BEHP Co-Investor II, L.P.LP InterestMay 06, 2022
Coherent Group Inc.Series B Preferred SharesApril 21, 2022
Coherent Group Inc.Series B Preferred SharesDecember 28, 2023
Elliott Alto Co-Investor Aggregator L.P.LP InterestSeptember 28, 2022
Fifth Season Investments LLCClass A UnitsOctober 17, 2022
Halo Parent Newco, LLCClass H PIK Preferred EquityFebruary 22, 2022
Juniper Square, Inc.WarrantsDecember 29, 2022
Knockout Intermediate Holdings I Inc. (dba Kaseya Inc.)Perpetual Preferred StockJune 23, 2022
LSI Financing 1 DACPreferred EquityDecember 14, 2022
Minerva Holdco, Inc.Senior A Preferred StockFebruary 15, 2022
Orange Blossom Parent, Inc.Common UnitsJuly 29, 2022
Project Alpine Co-Invest Fund, LPLP InterestJune 13, 2022
Project Hotel California Co-Invest Fund, L.P.LP InterestAugust 09, 2022
Romulus Intermediate Holdings 1 Inc. (dba PetVet Care Centers)Series A Preferred StockNovember 15, 2023
Securiti, Inc.Series C Preferred SharesJuly 29, 2022
Simpler Postage, Inc. (dba Easypost)WarrantsJune 12, 2024
TravelPerk, Inc.WarrantsMay 02, 2024
Vestwell Holdings, Inc.Series D Preferred StockDecember 20, 2023
KWOL Acquisition Inc. (dba Worldwide Clinical Trials)Class A InterestNovember 30, 2023
WP Irving Co-Invest, L.P.Partnership UnitsMay 18, 2022
XOMA CorporationWarrantsDecember 15, 2023
Zoro TopCo, L.P.Class A Common UnitsNovember 22, 2022
Zoro TopCo, Inc.Series A Preferred EquityNovember 22, 2022
[9] In connection with its investment in AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC and AAM Series 2.1 Aviation Feeder, LLC (collectively, “Amergin AssetCo”) the Company made a minority investment in Amergin Asset Management, LLC, which has entered into a Servicing Agreement with Amergin AssetCo.
[10] In connection with its investment in AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC and AAM Series 2.1 Aviation Feeder, LLC (collectively, “Amergin AssetCo”) the Company made a minority investment in Amergin Asset Management, LLC, which has entered into a Servicing Agreement with Amergin AssetCo.
[11] Contains a fixed-rate structure.
[12] This portfolio company is not a qualifying asset under Section 55(a) of the 1940 Act. Under the 1940 Act, the Company may not acquire any non-qualifying asset unless, at the time such acquisition is made, qualifying assets represent at least 70% of total assets. As of December 31, 2023, non-qualifying assets represented 16.7% of total assets as calculated in accordance with the regulatory requirements.
[13] Under the Investment Company Act of 1940, as amended (the “1940 Act”), the Company is deemed to be an “Affiliated Person” of, as defined in the 1940 Act, this portfolio company, as the Company owns more than 5% but less than 25% of the portfolio company’s outstanding voting securities or has the power to exercise control over management or policies of such portfolio company, including through a management agreement. Transactions during the year ended December 31, 2023 in which the Company was an Affiliated Person of the portfolio company are as follows:
CompanyFair Value at December 31, 2022Gross Additions (a)Gross Reductions (b)Net Change in Unrealized Gain/(Loss)TransfersFair Value at December 31, 2023Interest IncomeDividend IncomeOther Income
Non-Controlled Affiliates
AAM Series 2.1 Aviation Feeder, LLC(c)
$348 $16,913 $— $177 $— $17,438 $136 $— $— 
AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC(c)
— 14,579 — (170)— 14,409 423 — — 
Coherent Group Inc.— 1,711 — 102 14,391 16,204 — — — 
Fifth Season Investments LLC25,110 18,794 — — 43,908 — 1,390 — 
LSI Financing 1 DAC6,175 14,694 (1,914)1,033 — 19,988 — 251 — 
Total Non-Controlled Affiliates$31,633 $66,691 $(1,914)$1,146 $14,391 $111,947 $559 $1,641 $— 
_______________
(a)Gross additions include increases in the cost basis of investments resulting from new investments, payment-in-kind interest or dividends, and the amortization of any unearned income or discounts on equity investments, as applicable.
(b)Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, and the amortization of any premiums on equity investments, as applicable.
(c)In connection with its investment in AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC and AAM Series 2.1 Aviation Feeder, LLC (collectively, “Amergin AssetCo”) the Company made a minority investment in Amergin Asset Management, LLC, which has entered into a Servicing Agreement with Amergin AssetCo.
[14] Contains a fixed-rate structure.
[15] This portfolio company is not a qualifying asset under Section 55(a) of the 1940 Act. Under the 1940 Act, the Company may not acquire any non-qualifying asset unless, at the time such acquisition is made, qualifying assets represent at least 70% of total assets. As of September 30, 2024, non-qualifying assets represented 16.8% of total assets as calculated in accordance with the regulatory requirements.
[16] Position or portion thereof is an unfunded loan or equity commitment. See Note 7 “Commitments and Contingencies”.
[17] Position or portion thereof is an unfunded loan or equity commitment. See Note 7 “Commitments and Contingencies”.
[18] The date disclosed represents the commitment period of the unfunded term loan. Upon expiration of the commitment period, the funded portion of the term loan may be subject to a longer maturity date.
[19] The negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan. The negative fair value is the result of the capitalized discount on the loan.
[20] The interest rate on these loans is subject to 3 month SOFR, which as of September 30, 2024 was 4.59%.
[21] Not a co-investment made with the Company’s affiliates.
[22] Not a co-investment made with the Company’s affiliates.
[23] The interest rate on these loans is subject to 3 month SOFR, which as of December 31, 2023 was 5.33%.
[24] The interest rate on these loans is subject to 6 month SOFR, which as of September 30, 2024 was 4.25%.
[25] Level 2 investment.
[26] The interest rate on these loans is subject to 1 month SOFR, which as of September 30, 2024 was 4.85%.
[27] The date disclosed represents the commitment period of the unfunded term loan. Upon expiration of the commitment period, the funded portion of the term loan may be subject to a longer maturity date.
[28] The negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan. The negative fair value is the result of the capitalized discount on the loan.
[29] The interest rate on these loans is subject to 1 month SOFR, which as of December 31, 2023 was 5.35%.
[30] The interest rate on this loan is subject to SONIA, which as of December 31, 2023 was 5.19%.
[31] The interest rate on this loan is subject to SONIA, which as of September 30, 2024 was 4.95%.
[32] Level 2 investment.
[33] The interest rate on this loan is subject 6 month EURIBOR, which as of September 30, 2024 was 3.11%.
[34] Investment is not pledged as collateral for the credit facilities.
[35] The interest rate on these loans is subject to 6 month SOFR, which as of December 31, 2023 was 5.16%.
[36] The interest rate on this loan is subject to 3 month EURIBOR, which as of December 31, 2023 was 3.91%.
[37] The interest rate on this loan is subject to 3 month EURIBOR, which as of September 30, 2024 was 3.28%.
[38] Investment is not pledged as collateral for the credit facilities.
[39] The interest rate on this loan is subject 3 month BBSY, which as of September 30, 2024 was 4.43%.