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Fair Value of Financial Instruments - Narrative (Details)
6 Months Ended 12 Months Ended
Jan. 20, 2021
USD ($)
Jun. 30, 2023
USD ($)
company
Dec. 31, 2022
USD ($)
company
Schedule of Investments [Line Items]      
Investments at Amortized Cost   $ 2,974,902,000 [1] $ 2,927,131,000 [2]
Unfunded commitments   202,539,000 261,685,000
Debt Securities, Delayed Draw Term Loan      
Schedule of Investments [Line Items]      
Unfunded commitments   86,900,000 128,800,000
FBLC Senior Loan Fund, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   931,623,000 923,304,000
FBLC Senior Loan Fund, LLC | Debt Securities, Delayed Draw Term Loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,600,000 1,600,000
FBLC Senior Loan Fund, LLC      
Schedule of Investments [Line Items]      
Investment sold   0 0
Investment, Identifier [Axis]: 1236904 BC, Ltd. Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   10,315,000  
Investment, Identifier [Axis]: 1236904 BC, Ltd., Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4],[5]   17,957,000  
Investment, Identifier [Axis]: 1236904 BC, Ltd., Software/Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7]     10,298,000
Investment, Identifier [Axis]: 1236904 BC, Ltd., Software/Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7],[8]     18,003,000
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC , Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   13,390,000  
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   2,780,000  
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC, Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7]     13,436,000
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC, Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     2,794,000
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC, Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,951,000  
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC, Senior Secured First Lien Debt, Delayed draw term loan 1      
Schedule of Investments [Line Items]      
Unfunded commitments     789,000
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC, Senior Secured First Lien Debt, Delayed draw term loan 2      
Schedule of Investments [Line Items]      
Unfunded commitments     2,951,000
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,264,000 1,264,000
Investment, Identifier [Axis]: AIG CLO, Ltd. 21-1A F      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,294,000  
Investment, Identifier [Axis]: AIG CLO, Ltd. 21-1A F, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,291,000
Investment, Identifier [Axis]: AP Gaming I, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,264,000  
Investment, Identifier [Axis]: AP Gaming I, LLC, Gaming/Lodging      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,291,000
Investment, Identifier [Axis]: Absolute Software Corp., Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   44,265,000 [4],[5],[9] 44,417,000 [7],[8],[10]
Investment, Identifier [Axis]: Accentcare, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   9,878,000  
Investment, Identifier [Axis]: Accentcare, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   29,742,000  
Investment, Identifier [Axis]: Accentcare, Inc., Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7]     29,691,000
Investment, Identifier [Axis]: Accentcare, Inc., Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     9,929,000
Investment, Identifier [Axis]: Access CIG, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,160,000  
Investment, Identifier [Axis]: Access Cig, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,180,000
Investment, Identifier [Axis]: Acrisure, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   19,688,000  
Investment, Identifier [Axis]: Acrisure, LLC, Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     19,758,000
Investment, Identifier [Axis]: Aden & Anais Holdings, Inc., Retail      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11],[12]     0
Investment, Identifier [Axis]: Adtalem Global Education, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,042,000  
Investment, Identifier [Axis]: Adtalem Global Education, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   692,000  
Investment, Identifier [Axis]: Adtalem Global Education, Inc., Education 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,042,000
Investment, Identifier [Axis]: Adtalem Global Education, Inc., Education 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     693,000
Investment, Identifier [Axis]: Advisor Group, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,782,000  
Investment, Identifier [Axis]: Advisor Group, Inc., Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,823,000
Investment, Identifier [Axis]: Alchemy US Holdco 1, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   15,465,000  
Investment, Identifier [Axis]: Alchemy US Holdco 1, LLC, Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     15,441,000
Investment, Identifier [Axis]: Alera Group Intermediate Holdings, Inc, Financials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     5,779,000
Investment, Identifier [Axis]: Alera Group Intermediate Holdings, Inc., Financials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   5,759,000  
Investment, Identifier [Axis]: Alera Group Intermediate Holdings, Inc., Financials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   9,356,000 [4] 6,598,000 [7]
Investment, Identifier [Axis]: Alera Group Intermediate Holdings, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,391,000 5,197,000
Investment, Identifier [Axis]: Allegiant Travel, Co., Transportation      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,194,000
Investment, Identifier [Axis]: Allied Universal Holdco, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,854,000  
Investment, Identifier [Axis]: Altice Financing, SA      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,943,000  
Investment, Identifier [Axis]: Altice Financing, SA, Telecom      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,937,000
Investment, Identifier [Axis]: Altice France, SA      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   11,725,000  
Investment, Identifier [Axis]: Alvogen Pharma US, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   11,514,000  
Investment, Identifier [Axis]: Alvogen Pharma US, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     11,809,000
Investment, Identifier [Axis]: AmWINS Group, Inc., Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,869,000
Investment, Identifier [Axis]: Amentum Government Services Holdings, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,890,000  
Investment, Identifier [Axis]: Amentum Government Services Holdings, LLC 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,952,000  
Investment, Identifier [Axis]: Amentum Government Services Holdings, LLC, Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,960,000
Investment, Identifier [Axis]: Amentum Government Services Holdings, LLC, Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,909,000
Investment, Identifier [Axis]: American Airlines Inc/AAdvantage Loyalty IP, Ltd.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   8,252,000  
Investment, Identifier [Axis]: American Airlines Inc/AAdvantage Loyalty IP, Ltd., Transportation      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     8,249,000
Investment, Identifier [Axis]: American Rock Salt Company, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,924,000  
Investment, Identifier [Axis]: American Rock Salt Company, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,705,000  
Investment, Identifier [Axis]: American Rock Salt Company, LLC, Chemicals 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,729,000
Investment, Identifier [Axis]: American Rock Salt Company, LLC, Chemicals 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,924,000
Investment, Identifier [Axis]: Anchor Glass Container Corp., Paper & Packaging      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,735,000 [4],[13] 6,150,000 [7],[14]
Investment, Identifier [Axis]: Apollo Commercial Real Estate Finance, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,000,000  
Investment, Identifier [Axis]: Apollo Commercial Real Estate Finance, Inc., Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,000,000
Investment, Identifier [Axis]: AppLovin Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   8,874,000  
Investment, Identifier [Axis]: AppLovin Corp., Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     8,913,000
Investment, Identifier [Axis]: Arch Global Precision, LLC , Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     2,356,000
Investment, Identifier [Axis]: Arch Global Precision, LLC, Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4],[5]   7,422,000  
Investment, Identifier [Axis]: Arch Global Precision, LLC, Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   2,344,000  
Investment, Identifier [Axis]: Arch Global Precision, LLC, Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7],[8]     7,457,000
Investment, Identifier [Axis]: Arch Global Precision, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,008,000 1,008,000
Investment, Identifier [Axis]: Arctic Holdco, LLC , Paper & Packaging 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7],[8]     59,823,000
Investment, Identifier [Axis]: Arctic Holdco, LLC, Paper & Packaging      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   915,000  
Investment, Identifier [Axis]: Arctic Holdco, LLC, Paper & Packaging 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   59,619,000 [3],[4],[5] 2,439,000 [7]
Investment, Identifier [Axis]: Arctic Holdco, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   3,659,000 2,135,000
Investment, Identifier [Axis]: Armada Parent, Inc. , Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     2,253,000
Investment, Identifier [Axis]: Armada Parent, Inc., Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   43,849,000  
Investment, Identifier [Axis]: Armada Parent, Inc., Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,242,000 [4] 43,998,000 [7]
Investment, Identifier [Axis]: Armada Parent, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,258,000 2,259,000
Investment, Identifier [Axis]: Armada Parent, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   5,420,000 5,420,000
Investment, Identifier [Axis]: Artera Services, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,442,000  
Investment, Identifier [Axis]: Artera Services, LLC, Utilities      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,453,000
Investment, Identifier [Axis]: Aruba Investments Holdings, LLC, Chemicals      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,721,000 [4],[5] 3,717,000 [8]
Investment, Identifier [Axis]: Ascensus Holidngs, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,875,000  
Investment, Identifier [Axis]: Ascensus Holidngs, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,913,000
Investment, Identifier [Axis]: Astoria Energy, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,921,000  
Investment, Identifier [Axis]: Astoria Energy, LLC, Utilities      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,937,000
Investment, Identifier [Axis]: Astro AB Merger Sub, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,765,000  
Investment, Identifier [Axis]: Astro AB Merger Sub, Inc., Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4],[9]   8,066,000  
Investment, Identifier [Axis]: Astro AB Merger Sub, Inc., Financials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7],[10]     8,145,000
Investment, Identifier [Axis]: Astro AB Merger Sub, Inc., Financials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,792,000
Investment, Identifier [Axis]: Asurion, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,841,000  
Investment, Identifier [Axis]: Asurion, LLC 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   9,384,000  
Investment, Identifier [Axis]: Asurion, LLC, Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,857,000
Investment, Identifier [Axis]: Asurion, LLC, Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,605,000
Investment, Identifier [Axis]: Athenahealth Group, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   12,827,000  
Investment, Identifier [Axis]: Athenahealth, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     12,891,000
Investment, Identifier [Axis]: Athletico Management, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,930,000  
Investment, Identifier [Axis]: Athletico Management, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,952,000
Investment, Identifier [Axis]: Avalara, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   4,030,000 4,030,000
Investment, Identifier [Axis]: Avalara, Inc., Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   39,406,000 [4] 39,323,000 [7]
Investment, Identifier [Axis]: Avaya Holdings Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,244,000  
Investment, Identifier [Axis]: Avaya Holdings Corp. 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   244,000  
Investment, Identifier [Axis]: Avaya Holdings Corp. 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,434,000  
Investment, Identifier [Axis]: Avaya Holdings Corp., Technology      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     8,543,000
Investment, Identifier [Axis]: Aveanna Healthcare, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6]     905,000
Investment, Identifier [Axis]: Aveanna Healthcare, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     92,000
Investment, Identifier [Axis]: Aventine Holdings, LLC , Media/Entertainment 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[8]     25,811,000
Investment, Identifier [Axis]: Aventine Holdings, LLC, Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[5]   26,391,000  
Investment, Identifier [Axis]: Aventine Holdings, LLC, Media/Entertainment 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,591,000 [4] 9,584,000 [7]
Investment, Identifier [Axis]: Aventine Holdings, LLC, Media/Entertainment 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   25,663,000 [4] 24,342,000 [7]
Investment, Identifier [Axis]: Aventine Holdings, LLC, Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments     805,000
Investment, Identifier [Axis]: Axiom Global, Inc, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7],[8]     20,195,000
Investment, Identifier [Axis]: Axiom Global, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4],[5]   20,106,000  
Investment, Identifier [Axis]: BCP Renaissance, LLC, Energy      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,043,000
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[5]   20,132,000  
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc., Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,415,000 [4],[5] 3,399,000 [7],[8]
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc., Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,735,000 [4] 20,003,000 [7],[8]
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc., Healthcare 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,425,000 [4] 3,425,000 [7]
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc., Healthcare 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     1,727,000
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments     9,682,000
Investment, Identifier [Axis]: BMC Software Finance, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   12,536,000  
Investment, Identifier [Axis]: BMC Software Finance, Inc., Technology      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     12,621,000
Investment, Identifier [Axis]: Baker Hill Acquisition, LLC, Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15] 0 [7],[11]
Investment, Identifier [Axis]: Bally's Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,669,000  
Investment, Identifier [Axis]: Bally's Corp., Gaming/Lodging      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,680,000
Investment, Identifier [Axis]: Battalion CLO, Ltd. 21-17A F      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,139,000  
Investment, Identifier [Axis]: Battalion CLO, Ltd. 21-17A F, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,137,000
Investment, Identifier [Axis]: Bella Holding Company, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,915,000  
Investment, Identifier [Axis]: Bella Holding Company, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,927,000
Investment, Identifier [Axis]: Black Mountain Sand, LLC, Energy      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   1,638,000  
Investment, Identifier [Axis]: Black Mountain Sand, LLC, Energy 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     8,310,000
Investment, Identifier [Axis]: Black Mountain Sand, LLC, Energy 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15],[16] 0 [7],[11],[17]
Investment, Identifier [Axis]: Blackstone CQP Holdco, LP      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   8,170,000  
Investment, Identifier [Axis]: Blackstone CQP Holdco, LP, Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,857,000
Investment, Identifier [Axis]: Bomgar Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,835,000  
Investment, Identifier [Axis]: Bomgar Corp., Technology      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,857,000
Investment, Identifier [Axis]: CDK Global, Inc., Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,551,000
Investment, Identifier [Axis]: CDS U.S. Intermediate Holdings, Inc., Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     5,444,000
Investment, Identifier [Axis]: CDS U.S. Intermediate Holdings, Inc., Media/Entertainment 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [10],[11],[18]     1,224,000
Investment, Identifier [Axis]: CDS U.S. Intermediate Holdings, Inc., Media/Entertainment 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [10],[11],[18]     437,000
Investment, Identifier [Axis]: CHA Holdings, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   498,000 [4],[5] 496,000 [7],[8]
Investment, Identifier [Axis]: CLP Health Services, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   12,684,000  
Investment, Identifier [Axis]: CLP Health Services, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     12,744,000
Investment, Identifier [Axis]: CNT Holdings I Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,421,000  
Investment, Identifier [Axis]: CRS-SPV, Inc., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[15],[19]   2,219,000  
Investment, Identifier [Axis]: CRS-SPV, Inc., Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   62,000 [4],[19] 62,000 [7],[20]
Investment, Identifier [Axis]: CRS-SPV, Inc., Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11],[20]     2,218,000
Investment, Identifier [Axis]: CRS-SPV, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   162,000 162,000
Investment, Identifier [Axis]: Cablevision Lightpath, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,942,000  
Investment, Identifier [Axis]: Cablevision Lightpath, LLC, Telecom      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,936,000
Investment, Identifier [Axis]: Capstone Logistics, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,804,000 1,804,000
Investment, Identifier [Axis]: Capstone Logistics, Transportation      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   1,110,000  
Investment, Identifier [Axis]: Capstone Logistics, Transportation 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   18,804,000 [3],[4] 1,115,000 [7]
Investment, Identifier [Axis]: Capstone Logistics, Transportation 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7]     18,882,000
Investment, Identifier [Axis]: Carlisle FoodService Products, Inc., Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,646,000 [4] 10,633,000 [7]
Investment, Identifier [Axis]: Carlyle GMS CLO, 16-3A FRR      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,993,000  
Investment, Identifier [Axis]: Carlyle GMS CLO, 16-3A FRR, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,990,000
Investment, Identifier [Axis]: Cirque Du Soleil Holding USA Newco, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,457,000  
Investment, Identifier [Axis]: Cirque Du Soleil Holding USA Newco, Inc. 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [9],[15],[21]   437,000  
Investment, Identifier [Axis]: Cirque Du Soleil Holding USA Newco, Inc.1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [9],[15],[21]   1,224,000  
Investment, Identifier [Axis]: Clover Technologies Group, LLC, Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,153,000 [4],[15] 1,153,000 [7],[11]
Investment, Identifier [Axis]: Clover Technologies Group, LLC, Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   275,000 [4],[15] 275,000 [7],[11]
Investment, Identifier [Axis]: Cnt Holdings I Corp., Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,439,000
Investment, Identifier [Axis]: Cold Spring Brewing, Co., Food & Beverage      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,525,000 [3],[4],[5] 6,973,000 [6],[7],[8]
Investment, Identifier [Axis]: CommerceHub, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   9,493,000  
Investment, Identifier [Axis]: CommerceHub, Inc., Technology      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   12,317,000  
Investment, Identifier [Axis]: CommerceHub, Inc., Technology 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     12,314,000
Investment, Identifier [Axis]: CommerceHub, Inc., Technology 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     9,551,000
Investment, Identifier [Axis]: Communication Technology Intermediate, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[5]   6,192,000  
Investment, Identifier [Axis]: Communication Technology Intermediate, LLC, Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   17,572,000 [3],[4] 17,632,000 [6],[7]
Investment, Identifier [Axis]: Communication Technology Intermediate, LLC, Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   205,000 [4] 6,223,000 [7],[8]
Investment, Identifier [Axis]: Communication Technology Intermediate, LLC, Business Services 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     205,000
Investment, Identifier [Axis]: Communication Technology Intermediate, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,158,000 2,158,000
Investment, Identifier [Axis]: Community Care Health Network, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   9,597,000  
Investment, Identifier [Axis]: Community Care Health Network, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     9,641,000
Investment, Identifier [Axis]: Compass Power Generation, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,223,000  
Investment, Identifier [Axis]: Compass Power Generation, LLC, Utilities      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,384,000
Investment, Identifier [Axis]: Connect Finco SARL      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,440,000  
Investment, Identifier [Axis]: Connect Finco SARL, Telecom      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,479,000
Investment, Identifier [Axis]: Connectwise, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,884,000  
Investment, Identifier [Axis]: Connectwise, LLC, Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     6,923,000
Investment, Identifier [Axis]: Conservice Midco, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,590,000  
Investment, Identifier [Axis]: Conservice Midco, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,630,000
Investment, Identifier [Axis]: Conterra Ultra Broadband, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,608,000  
Investment, Identifier [Axis]: Conterra Ultra Broadband, LLC, Telecom      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     6,642,000
Investment, Identifier [Axis]: Corelogic, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,849,000  
Investment, Identifier [Axis]: Corelogic, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,728,000  
Investment, Identifier [Axis]: Corelogic, Inc., Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     10,721,000
Investment, Identifier [Axis]: Corelogic, Inc., Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,887,000
Investment, Identifier [Axis]: Corfin Industries, LLC, Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4],[5]   16,117,000  
Investment, Identifier [Axis]: Corfin Industries, LLC, Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,590,000 [4] 1,602,000 [7]
Investment, Identifier [Axis]: Corfin Industries, LLC, Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   9,335,000 [4] 16,212,000 [6],[7],[8]
Investment, Identifier [Axis]: Cornerstone Chemical, Co., Chemicals      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   14,600,000 14,541,000
Investment, Identifier [Axis]: Covenant Credit Partners CLO, Ltd. 17 1A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,309,000  
Investment, Identifier [Axis]: Covenant Credit Partners CLO, Ltd. 17 1A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,298,000
Investment, Identifier [Axis]: Danish CRJ, Ltd., Transportation      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[9],[15],[19],[22] 0 [7],[10],[11],[20],[23]
Investment, Identifier [Axis]: Del Real, LLC, Food & Beverage      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[15],[16]   382,000  
Investment, Identifier [Axis]: Del Real, LLC, Food & Beverage 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     4,679,000
Investment, Identifier [Axis]: Del Real, LLC, Food & Beverage 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11],[17]     382,000
Investment, Identifier [Axis]: Directv Financing, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,177,000  
Investment, Identifier [Axis]: Directv Financing, LLC, Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,400,000
Investment, Identifier [Axis]: Dish Dbs Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   700,000  
Investment, Identifier [Axis]: Dish Dbs Corp. 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,000,000  
Investment, Identifier [Axis]: Dish Dbs Corp., Cable 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     700,000
Investment, Identifier [Axis]: Dish Dbs Corp., Cable 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,000,000
Investment, Identifier [Axis]: Division Holding Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   8,609,000  
Investment, Identifier [Axis]: Division Holding Corp., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     8,657,000
Investment, Identifier [Axis]: Drilling Info Holdings, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,806,000 [4],[5] 6,816,000 [7],[8]
Investment, Identifier [Axis]: Dynagrid Holdings, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,262,000 2,262,000
Investment, Identifier [Axis]: Dynagrid Holdings, LLC, Utilities      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[5]   13,909,000  
Investment, Identifier [Axis]: Dynagrid Holdings, LLC, Utilities 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,809,000 [3],[4] 3,832,000 [6],[7]
Investment, Identifier [Axis]: Dynagrid Holdings, LLC, Utilities 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[8]     14,012,000
Investment, Identifier [Axis]: Dynasty Acquisition Co., Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,709,000  
Investment, Identifier [Axis]: Dynasty Acquisition Co., Inc. 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,039,000  
Investment, Identifier [Axis]: Dynasty Acquisition Co., Inc., Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,990,000
Investment, Identifier [Axis]: Dynasty Acquisition Co., Inc., Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,683,000
Investment, Identifier [Axis]: Dyno Acquiror, Inc. , Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11]     58,000
Investment, Identifier [Axis]: Dyno Acquiror, Inc., Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[15]   58,000  
Investment, Identifier [Axis]: Eaton Vance CDO, Ltd. 15-1A FR      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,771,000  
Investment, Identifier [Axis]: Eaton Vance CDO, Ltd. 15-1A FR, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,758,000
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Transportation      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,298,000
Investment, Identifier [Axis]: Edelman Financial Center, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,559,000  
Investment, Identifier [Axis]: Edelman Financial Services, LLC, Financials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,944,000
Investment, Identifier [Axis]: Edelman Financial Services, LLC, Financials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,256,000
Investment, Identifier [Axis]: Edgewater Generation, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,365,000  
Investment, Identifier [Axis]: Edgewater Generation, LLC, Utilities      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,363,000
Investment, Identifier [Axis]: Elevation CLO, Ltd. 13-1A D2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,965,000  
Investment, Identifier [Axis]: Elevation CLO, Ltd. 13-1A D2, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,963,000
Investment, Identifier [Axis]: Eliassen Group, LLC , Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   437,000  
Investment, Identifier [Axis]: Eliassen Group, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[5]   11,434,000  
Investment, Identifier [Axis]: Eliassen Group, LLC, Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[8]     11,482,000
Investment, Identifier [Axis]: Eliassen Group, LLC, Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     439,000
Investment, Identifier [Axis]: Eliassen Group, LLC, Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,492,000 2,493,000
Investment, Identifier [Axis]: Entain Holdings Gibraltar, Ltd.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   500,000  
Investment, Identifier [Axis]: FBLC Senior Loan Fund, LLC      
Schedule of Investments [Line Items]      
Assets contributed $ 751,800,000    
Investments contributed 664,200,000    
Cash contributed 42,400,000    
Liabilities contributed 446,900,000    
Debt contributed 344,400,000    
Investments at Amortized Cost $ 304,900,000 304,900,000 304,900,000
Investment, Identifier [Axis]: FBLC Senior Loan Fund, LLC, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   304,934,000 [4],[9],[19],[24] 304,934,000 [7],[10],[20],[25]
Investment, Identifier [Axis]: FGT Purchaser, LLC, Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   20,827,000  
Investment, Identifier [Axis]: FGT Purchaser, LLC, Consumer 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   836,000 [4] 20,898,000 [6],[7]
Investment, Identifier [Axis]: FGT Purchaser, LLC, Consumer 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     815,000
Investment, Identifier [Axis]: FGT Purchaser, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,308,000 1,329,000
Investment, Identifier [Axis]: Faraday Buyer, LLC, Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   597,000 2,551,000
Investment, Identifier [Axis]: Faraday Buyer, LLC, Utilities      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   25,378,000 [4] 25,377,000 [7]
Investment, Identifier [Axis]: Faraday Buyer, LLC, Utilities 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   1,949,000  
Investment, Identifier [Axis]: First Eagle Greenway Fund II, LLC, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,977,000 [9],[15],[21] 3,977,000 [10],[11],[18]
Investment, Identifier [Axis]: First Eagle Holdings, Inc., Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   14,638,000 [4] 14,590,000 [7]
Investment, Identifier [Axis]: Flex Acquisition Company, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,421,000  
Investment, Identifier [Axis]: Flex Acquisition Company, Inc., Paper & Packaging      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,430,000
Investment, Identifier [Axis]: Florida Food Products, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,806,000  
Investment, Identifier [Axis]: Florida Food Products, LLC, Food & Beverage      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,835,000
Investment, Identifier [Axis]: Foley Products Co, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,042,000  
Investment, Identifier [Axis]: Foley Products Co, LLC, Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,146,000
Investment, Identifier [Axis]: Foresight Energy Operating, LLC, Energy      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[21]   1,071,000  
Investment, Identifier [Axis]: Foresight Energy Operating, LLC, Energy 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[18]     1,077,000
Investment, Identifier [Axis]: Foresight Energy Operating, LLC, Energy 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,087,000 [4],[15],[16],[21] 2,087,000 [7],[11],[17],[18]
Investment, Identifier [Axis]: Fortress Credit BSL, Ltd. 22-1A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   981,000  
Investment, Identifier [Axis]: Fortress Credit BSL, Ltd. 22-1A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     981,000
Investment, Identifier [Axis]: Frontier Communications Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,289,000  
Investment, Identifier [Axis]: Frontier Communications Corp. 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   19,119,000  
Investment, Identifier [Axis]: Frontier Communications Corp., Telecom 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,294,000
Investment, Identifier [Axis]: Frontier Communications Corp., Telecom 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     19,215,000
Investment, Identifier [Axis]: GVC Holdings Gibraltar, Ltd.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,896,000  
Investment, Identifier [Axis]: GVC Holdings Gibraltar, Ltd., Gaming/Lodging      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,920,000
Investment, Identifier [Axis]: Galaxy US OpCo, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,307,000  
Investment, Identifier [Axis]: Galway Borrower, LLC, Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   29,258,000 [3],[4] 29,372,000 [6],[7]
Investment, Identifier [Axis]: Galway Borrower, LLC, Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   275,000 275,000
Investment, Identifier [Axis]: Galway Borrower, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,894,000 1,894,000
Investment, Identifier [Axis]: Geon Performance Solutions, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,608,000  
Investment, Identifier [Axis]: Geon Performance Solutions, LLC, Chemicals      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,627,000
Investment, Identifier [Axis]: Geosyntec Consultants, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     26,802,000
Investment, Identifier [Axis]: Geosyntec Consultants, Inc., Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   26,701,000  
Investment, Identifier [Axis]: Geosyntec Consultants, Inc., Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   6,345,000  
Investment, Identifier [Axis]: Geosyntec Consultants, Inc., Business Services 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   325,000  
Investment, Identifier [Axis]: Geosyntec Consultants, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   6,650,000 13,005,000
Investment, Identifier [Axis]: Geosyntec Consultants, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   4,444,000 4,769,000
Investment, Identifier [Axis]: Gogo Intermediate Holdings, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,053,000 1,053,000
Investment, Identifier [Axis]: Gordian Medical, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,845,000  
Investment, Identifier [Axis]: Gordian Medical, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     10,890,000
Investment, Identifier [Axis]: Great Lakes CLO, Ltd. 21-6A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,962,000  
Investment, Identifier [Axis]: Great Lakes CLO, Ltd. 21-6A E , Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,956,000
Investment, Identifier [Axis]: Green Energy Partners/Stonewall, LLC, Utilities      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,055,000 [4] 10,086,000 [7]
Investment, Identifier [Axis]: Greeneden U.S. Holdings I, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,785,000  
Investment, Identifier [Axis]: Greeneden U.S. Holdings I, LLC, Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,801,000
Investment, Identifier [Axis]: Greywolf CLO, Ltd. 20-3RA ER      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   883,000  
Investment, Identifier [Axis]: Greywolf CLO, Ltd. 20-3RA ER, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     879,000
Investment, Identifier [Axis]: HAH Group Holding Company, LLC 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,676,000  
Investment, Identifier [Axis]: HAH Group Holding Company, LLC 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   726,000  
Investment, Identifier [Axis]: HAH Group Holding Company, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   12,237,000 [3],[4] 12,218,000 [6],[7]
Investment, Identifier [Axis]: HAH Group Holding Company, LLC, Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     5,700,000
Investment, Identifier [Axis]: HAH Group Holding Company, LLC, Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     730,000
Investment, Identifier [Axis]: Hamilton Projects Acquiror, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,878,000  
Investment, Identifier [Axis]: Hamilton Projects Acquiror, LLC, Utilities      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     5,074,000
Investment, Identifier [Axis]: Hayfin Kingsland XI, Ltd. 19-2A ER      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,432,000  
Investment, Identifier [Axis]: Hayfin Kingsland XI, Ltd. 19-2A ER, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,430,000
Investment, Identifier [Axis]: Heartland Dental, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,973,000  
Investment, Identifier [Axis]: Heartland Dental, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,792,000
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   168,000 [4],[15],[26] 168,000 [7],[11],[12]
Investment, Identifier [Axis]: Hertz Corp. 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,111,000  
Investment, Identifier [Axis]: Hertz Corp. 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   791,000  
Investment, Identifier [Axis]: Hertz Corp., Transportation 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,130,000
Investment, Identifier [Axis]: Hertz Corp., Transportation 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     791,000
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   14,455,000  
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., Financials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,819,000 [4] 14,514,000 [6],[7]
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., Financials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     2,910,000
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments     3,937,000
Investment, Identifier [Axis]: Highbridge Loan Management, Ltd. 11A-17 E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,731,000  
Investment, Identifier [Axis]: Highbridge Loan Management, Ltd. 11A-17 E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,716,000
Investment, Identifier [Axis]: HireRight, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,132,000  
Investment, Identifier [Axis]: HireRight, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     5,158,000
Investment, Identifier [Axis]: Hospice Care Buyer, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   17,650,000  
Investment, Identifier [Axis]: Hospice Care Buyer, Inc., Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   23,746,000 [3],[4] 4,530,000 [7]
Investment, Identifier [Axis]: Hospice Care Buyer, Inc., Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,047,000 [4] 23,809,000 [6],[7]
Investment, Identifier [Axis]: Hospice Care Buyer, Inc., Healthcare 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,775,000 [4] 17,702,000 [6],[7]
Investment, Identifier [Axis]: Hospice Care Buyer, Inc., Healthcare 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,507,000 [4] 1,903,000 [7]
Investment, Identifier [Axis]: Hospice Care Buyer, Inc., Healthcare 5      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     2,050,000
Investment, Identifier [Axis]: Hospice Care Buyer, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments     872,000
Investment, Identifier [Axis]: Hudson River Trading, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,311,000  
Investment, Identifier [Axis]: Hudson River Trading, LLC, Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     5,331,000
Investment, Identifier [Axis]: ICP Industrial, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,103,000  
Investment, Identifier [Axis]: ICP Industrial, Inc., Chemicals      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     6,897,000
Investment, Identifier [Axis]: ICR Operations, LLC, Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   41,195,000 [4] 41,633,000 [7]
Investment, Identifier [Axis]: ICR Operations, LLC, Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,931,000 [4] 1,545,000 [7]
Investment, Identifier [Axis]: ICR Operations, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   4,247,000 4,633,000
Investment, Identifier [Axis]: IDERA, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,410,000  
Investment, Identifier [Axis]: IDERA, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,884,000  
Investment, Identifier [Axis]: IDERA, Inc., Technology 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     6,921,000
Investment, Identifier [Axis]: IDERA, Inc., Technology 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,375,000
Investment, Identifier [Axis]: IG Investments Holdings, LLC, Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   17,278,000 [3],[4] 17,341,000 [6],[7]
Investment, Identifier [Axis]: IG Investments Holdings, LLC, Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   314,000 [3],[4] 315,000 [6],[7]
Investment, Identifier [Axis]: IG Investments Holdings, LLC, Business Services 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     556,000
Investment, Identifier [Axis]: IG Investments Holdings, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,390,000 834,000
Investment, Identifier [Axis]: IMA Financial Group, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,814,000  
Investment, Identifier [Axis]: IQN Holding Corp., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,841,000 2,349,000
Investment, Identifier [Axis]: IQN Holding Corp., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   848,000 1,017,000
Investment, Identifier [Axis]: IQN Holding Corp., Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[5]   11,068,000  
Investment, Identifier [Axis]: IQN Holding Corp., Software/Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   169,000 [4] 10,924,000 [7],[8]
Investment, Identifier [Axis]: IQN Holding Corp., Software/Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     191,000
Investment, Identifier [Axis]: Ideal Tridon Holdings, Inc. , Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     45,000
Investment, Identifier [Axis]: Ideal Tridon Holdings, Inc. , Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   29,776,000 [3],[4],[5] 30,519,000 [6],[7],[8]
Investment, Identifier [Axis]: Ideal Tridon Holdings, Inc. , Industrials 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     1,566,000
Investment, Identifier [Axis]: Ideal Tridon Holdings, Inc., Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   819,000  
Investment, Identifier [Axis]: Ideal Tridon Holdings, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,049,000 1,244,000
Investment, Identifier [Axis]: Indigo Buyer, Inc., Paper & Packaging 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   605,000 [4] 605,000 [7]
Investment, Identifier [Axis]: Indigo Buyer, Inc., Paper & Packaging 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   20,775,000 [4] 20,845,000 [7]
Investment, Identifier [Axis]: Indigo Buyer, Inc., Paper & Packaging 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   9,033,000  
Investment, Identifier [Axis]: Indigo Buyer, Inc., Paper & Packaging 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   7,982,000  
Investment, Identifier [Axis]: Indigo Buyer, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments     9,078,000
Investment, Identifier [Axis]: Indigo Buyer, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   3,025,000 3,025,000
Investment, Identifier [Axis]: Ineos US Finance, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,946,000  
Investment, Identifier [Axis]: Ineos Us Finance, LLC, Chemicals      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,966,000
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[19]   1,414,000  
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     1,062,000
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,208,000 [4],[19] 1,421,000 [7],[20]
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[15],[16],[19]   0  
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Industrials 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15],[16],[19] 0 [7],[11],[17],[20]
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Industrials 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11],[17],[20]     0
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   600,000 600,000
Investment, Identifier [Axis]: Integrated Global Services, Inc., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   11,114,000 [4],[5] 11,153,000 [7],[8]
Investment, Identifier [Axis]: Integrated Global Services, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,028,000 2,028,000
Investment, Identifier [Axis]: Intelsat Jackson Holdings, SA      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   8,032,000  
Investment, Identifier [Axis]: Intelsat Jackson Holdings, SA, Telecom      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     8,462,000
Investment, Identifier [Axis]: Internap Corp, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11],[20]     543,000
Investment, Identifier [Axis]: Internap Corp. , Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4],[19]   3,983,000  
Investment, Identifier [Axis]: Internap Corp., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   543,000 [4],[15],[19] 5,191,000 [6],[7],[20]
Investment, Identifier [Axis]: International Cruise & Excursions, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,810,000 [4],[5] 4,831,000 [7],[8]
Investment, Identifier [Axis]: Jack Ohio Finance, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,923,000  
Investment, Identifier [Axis]: Jack Ohio Finance, LLC, Gaming/Lodging      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,942,000
Investment, Identifier [Axis]: Jakks Pacific, Inc. , Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   242,000  
Investment, Identifier [Axis]: Jakks Pacific, Inc., Consumer 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     223,000
Investment, Identifier [Axis]: Jamestown CLO, Ltd. 22-18A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,741,000  
Investment, Identifier [Axis]: Jamestown CLO, Ltd. 22-18A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,735,000
Investment, Identifier [Axis]: Jane Street Group, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,628,000  
Investment, Identifier [Axis]: Jane Street Group, LLC, Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,864,000
Investment, Identifier [Axis]: Jump Financial, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,275,000  
Investment, Identifier [Axis]: Jump Financial, LLC, Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,298,000
Investment, Identifier [Axis]: K2 Intelligence Holdings, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,577,000 [3],[4],[5] 6,999,000 [6],[7],[8]
Investment, Identifier [Axis]: KKR Financial CLO, Ltd. 15 FR      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,903,000  
Investment, Identifier [Axis]: KKR Financial CLO, Ltd. 15 FR, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,899,000
Investment, Identifier [Axis]: Kahala Ireland OpCo Designated Activity Company, Transportation      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[9],[15],[19],[27]   0  
Investment, Identifier [Axis]: Kahala Ireland OpCo Designated Activity Company, Transportation 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[9],[19],[27] 0 [7],[10],[20],[28]
Investment, Identifier [Axis]: Kahala Ireland OpCo Designated Activity Company, Transportation 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[10],[11],[20],[28]     0
Investment, Identifier [Axis]: Kahala US OpCo, LLC, Transportation      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[9],[15],[19],[29] 0 [7],[10],[11],[20],[30]
Investment, Identifier [Axis]: KidKraft, Inc. (c), Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     1,060,000
Investment, Identifier [Axis]: KidKraft, Inc., Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   1,060,000  
Investment, Identifier [Axis]: KidKraft, Inc., Consumer 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[15],[16]   0  
Investment, Identifier [Axis]: KidKraft, Inc., Consumer 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11],[17]     0
Investment, Identifier [Axis]: Kingpin Intermediate Holdings, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,079,000  
Investment, Identifier [Axis]: Kissner Milling Co., Ltd.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,934,000  
Investment, Identifier [Axis]: Kissner Milling Co., Ltd., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,983,000  
Investment, Identifier [Axis]: Kissner Milling Co., Ltd., Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,983,000
Investment, Identifier [Axis]: Kissner Milling Co., Ltd., Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,928,000
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[5]   24,066,000  
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,311,000 [4] 24,148,000 [7],[8]
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   607,000 [4] 2,322,000 [7]
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,733,000 2,733,000
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,924,000 2,531,000
Investment, Identifier [Axis]: Kuehg Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,750,000  
Investment, Identifier [Axis]: LABL, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,893,000  
Investment, Identifier [Axis]: LABL, Inc., Paper & Packaging      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,908,000
Investment, Identifier [Axis]: LCM, Ltd. Partnership 16A ER2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,304,000  
Investment, Identifier [Axis]: LCM, Ltd. Partnership 16A ER2 , Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,295,000
Investment, Identifier [Axis]: Labrie Environmental Group, LLC, Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   22,002,000 [4],[9] 22,078,000 [7],[10]
Investment, Identifier [Axis]: Lakeland Tours, LLC, Education 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7],[8],[31]     4,258,000
Investment, Identifier [Axis]: Lakeland Tours, LLC, Education 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,460,000 [3],[4],[5] 3,958,000 [6],[7],[8],[31]
Investment, Identifier [Axis]: Lakeview Health Holdings, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   641,000 [4],[19] 0 [7],[11],[20]
Investment, Identifier [Axis]: Lakeview Health Holdings, Inc., Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   227,000 [4],[19] 579,000 [7],[20]
Investment, Identifier [Axis]: Lakeview Health Holdings, Inc., Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   130,000 [4],[19] 664,000 [7],[14],[20]
Investment, Identifier [Axis]: Lakeview Health Holdings, Inc., Healthcare 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   664,000 [4],[13],[19] 227,000 [7],[20]
Investment, Identifier [Axis]: Lakeview Health Holdings, Inc., Healthcare 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[15],[19]   0  
Investment, Identifier [Axis]: LifePoint Health, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,000,000  
Investment, Identifier [Axis]: LifePoint Health, Inc. 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,207,000  
Investment, Identifier [Axis]: LightSquared, LP, Telecom      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,082,000
Investment, Identifier [Axis]: Lightstone Holdco, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   358,000  
Investment, Identifier [Axis]: Lightstone Holdco, LLC 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,324,000  
Investment, Identifier [Axis]: Lightstone Holdco, LLC, Utilities 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     6,351,000
Investment, Identifier [Axis]: Lightstone Holdco, LLC, Utilities 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     359,000
Investment, Identifier [Axis]: Liquid Tech Solutions Holdings, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,021,000  
Investment, Identifier [Axis]: Liquid Tech Solutions Holdings, LLC, Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     10,071,000
Investment, Identifier [Axis]: Luxembourg Investment Co., 428 SARL      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,658,000  
Investment, Identifier [Axis]: Luxembourg Investment Co., 428 SARL, Chemicals      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,654,000
Investment, Identifier [Axis]: MCS Acquisition Corp., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[21]   768,000  
Investment, Identifier [Axis]: MCS Acquisition Corp., Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,103,000 [4],[15],[21] 772,000 [7],[18]
Investment, Identifier [Axis]: MCS Acquisition Corp., Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   694,000 [4],[15],[21] 4,103,000 [7],[11],[18]
Investment, Identifier [Axis]: MCS Acquisition Corp., Business Services 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11],[18]     357,000
Investment, Identifier [Axis]: MGTF Holdco, LLC, Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15],[16],[19] 0 [7],[11],[17],[20]
Investment, Identifier [Axis]: MGTF Radio Company, LLC, Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   46,500,000 [4],[19] 47,237,000 [7],[20]
Investment, Identifier [Axis]: MH Sub I, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,877,000  
Investment, Identifier [Axis]: MH Sub I, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     8,549,000
Investment, Identifier [Axis]: MPH Acquisition Holdings, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,992,000  
Investment, Identifier [Axis]: MPH Acquisition Holdings, LLC 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,837,000  
Investment, Identifier [Axis]: MPH Acquisition Holdings, LLC, Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,991,000
Investment, Identifier [Axis]: MPH Acquisition Holdings, LLC, Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,857,000
Investment, Identifier [Axis]: MYOB US Borrower, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,375,000  
Investment, Identifier [Axis]: MYOB US Borrower, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     5,400,000
Investment, Identifier [Axis]: Madison IAQ, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,986,000  
Investment, Identifier [Axis]: Madison IAQ, LLC, Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,985,000
Investment, Identifier [Axis]: Manna Pro Products, LLC, Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   23,697,000 [4],[5] 4,002,000 [7]
Investment, Identifier [Axis]: Manna Pro Products, LLC, Consumer 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,976,000 [4] 32,381,000 [7],[8]
Investment, Identifier [Axis]: Manna Pro Products, LLC, Consumer 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,962,000 [4] 1,962,000 [7]
Investment, Identifier [Axis]: Manna Pro Products, LLC, Consumer 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[5]   1,870,000  
Investment, Identifier [Axis]: Manna Pro Products, LLC, Consumer 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[5]   6,721,000  
Investment, Identifier [Axis]: Manna Pro Products, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   744,000 744,000
Investment, Identifier [Axis]: Marble Point CLO, Ltd. 20-1A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,410,000  
Investment, Identifier [Axis]: Marble Point CLO, Ltd. 20-1A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,406,000
Investment, Identifier [Axis]: McDonald Worley, P.C., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   15,198,000  
Investment, Identifier [Axis]: McDonald Worley, P.C., Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   20,000 [4],[15] 15,077,000 [7]
Investment, Identifier [Axis]: McDonald Worley, P.C., Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11]     20,000
Investment, Identifier [Axis]: McDonald Worley, P.C., Senior Secured First Lien Debt, Term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   293,000 414,000
Investment, Identifier [Axis]: Medalist Partners Corporate Finance CLO, Ltd. 21-1A D      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,864,000  
Investment, Identifier [Axis]: Medalist Partners Corporate Finance CLO, Ltd. 21-1A D, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,860,000
Investment, Identifier [Axis]: Medallion Midland Acquisition, LP      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,519,000  
Investment, Identifier [Axis]: Medallion Midland Acquisition, LP, Energy      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     5,544,000
Investment, Identifier [Axis]: Medical Depot Holdings, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   3,672,000  
Investment, Identifier [Axis]: Medical Depot Holdings, Inc., Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   20,630,000 [3],[4],[5] 20,252,000 [6],[7],[8]
Investment, Identifier [Axis]: Medical Depot Holdings, Inc., Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     3,512,000
Investment, Identifier [Axis]: Medical Depot Holdings, Inc., Healthcare 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     6,598,000
Investment, Identifier [Axis]: Medical Depot Holdings, Inc., Healthcare 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7]     15,724,000
Investment, Identifier [Axis]: Medical Management Resource Group, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   15,671,000  
Investment, Identifier [Axis]: Medical Management Resource Group, LLC, Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   6,565,000  
Investment, Identifier [Axis]: Medical Management Resource Group, LLC, Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   530,000  
Investment, Identifier [Axis]: Medical Management Resource Group, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   796,000 1,326,000
Investment, Identifier [Axis]: Mercury Merger Sub, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   13,876,000 [4] 13,869,000 [7]
Investment, Identifier [Axis]: Michael Baker International, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,258,000  
Investment, Identifier [Axis]: Michael Baker International, LLC, Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,272,000
Investment, Identifier [Axis]: Midwest Can Company, LLC, Paper & Packaging      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   31,923,000 [3],[4],[5] 31,688,000 [6],[7],[8]
Investment, Identifier [Axis]: Midwest Can Company, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,019,000 2,019,000
Investment, Identifier [Axis]: Miller Environmental Group, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   397,000  
Investment, Identifier [Axis]: Miller Environmental Group, Inc., Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   11,140,000 [3],[4],[5] 11,176,000 [6],[7],[8]
Investment, Identifier [Axis]: Miller Environmental Group, Inc., Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,184,000 [3],[4],[5] 10,213,000 [6],[7],[8]
Investment, Identifier [Axis]: Miller Environmental Group, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments     1,131,000
Investment, Identifier [Axis]: Miller Environmental Group, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   927,000 1,324,000
Investment, Identifier [Axis]: Mirra-Primeaccess Holdings, LLC, Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   47,982,000 [4] 48,129,000 [7]
Investment, Identifier [Axis]: Mirra-Primeaccess Holdings, LLC, Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,914,000 [4] 2,935,000 [7]
Investment, Identifier [Axis]: Mirra-Primeaccess Holdings, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   3,913,000 4,892,000
Investment, Identifier [Axis]: Monitronics International, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     5,336,000
Investment, Identifier [Axis]: Monumental RSN, LLC, Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,879,000 [4] 7,243,000 [7]
Investment, Identifier [Axis]: Monumental RSN, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   3,238,000 3,238,000
Investment, Identifier [Axis]: Motor Vehicle Software Corp., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   318,000 [4],[15],[26] 318,000 [7],[11],[12]
Investment, Identifier [Axis]: Muth Mirror Systems, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments     650,000
Investment, Identifier [Axis]: Muth Mirror Systems, LLC, Technology      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   1,299,000  
Investment, Identifier [Axis]: Muth Mirror Systems, LLC, Technology 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   14,573,000 [3],[4],[5] 14,707,000 [6],[7],[8]
Investment, Identifier [Axis]: Muth Mirror Systems, LLC, Technology 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     650,000
Investment, Identifier [Axis]: NTM Acquisition Corp., Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   19,977,000 [3],[5] 20,547,000 [6],[7],[8]
Investment, Identifier [Axis]: Naked Juice, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,413,000  
Investment, Identifier [Axis]: Naked Juice, LLC, Food & Beverage      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,420,000
Investment, Identifier [Axis]: National Mentor Holdings, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   179,000  
Investment, Identifier [Axis]: National Mentor Holdings, Inc. 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,394,000  
Investment, Identifier [Axis]: National Mentor Holdings, Inc., Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     178,000
Investment, Identifier [Axis]: National Mentor Holdings, Inc., Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     5,422,000
Investment, Identifier [Axis]: New Star Metals, Inc., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   31,983,000 [3],[4],[5] 32,113,000 [6],[7],[8]
Investment, Identifier [Axis]: NewStar Arlington Senior Loan Program, LLC 14-1A FR, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,611,000 [4],[9],[21] 4,603,000 [7],[10],[18]
Investment, Identifier [Axis]: NewStar Arlington Senior Loan Program, LLC 14-1A SUB, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,336,000 [4],[9],[21],[32] 11,714,000 [7],[10],[18],[33]
Investment, Identifier [Axis]: Newstar Fairfield Fund CLO, Ltd. 2015-1RA F, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,422,000 [4],[9],[21] 10,264,000 [7],[10],[18]
Investment, Identifier [Axis]: Newstar Fairfield Fund CLO, Ltd. 2015-1RA SUB, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,285,000 [4],[9],[21],[32] 6,285,000 [7],[10],[18],[33]
Investment, Identifier [Axis]: Nexus Buyer, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   9,185,000  
Investment, Identifier [Axis]: Nexus Buyer, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,442,000
Investment, Identifier [Axis]: Northwoods Capital, Ltd. 17-15A ER      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,927,000  
Investment, Identifier [Axis]: Northwoods Capital, Ltd. 17-15A ER, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,924,000
Investment, Identifier [Axis]: Norvax, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,152,000 1,152,000
Investment, Identifier [Axis]: Nouryon Finance B.V.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,283,000  
Investment, Identifier [Axis]: Nouryon Finance B.V., Chemicals      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,257,000
Investment, Identifier [Axis]: Novae, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,908,000  
Investment, Identifier [Axis]: Novae, LLC, Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,928,000
Investment, Identifier [Axis]: OCP CLO, Ltd. 14-5A DR      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,093,000  
Investment, Identifier [Axis]: OCP CLO, Ltd. 14-5A DR, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,087,000
Investment, Identifier [Axis]: OFSI Fund, Ltd. 2014-6A Side Letter, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   47,000 [4],[9] 47,000 [7],[10]
Investment, Identifier [Axis]: ORG GC Holdings, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[19]   9,615,000  
Investment, Identifier [Axis]: ORG GC Holdings, LLC, Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,492,000 [4],[19] 9,082,000 [7],[20]
Investment, Identifier [Axis]: ORG GC Holdings, LLC, Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   212,000 [4],[15],[16],[19] 4,109,000 [7],[20]
Investment, Identifier [Axis]: ORG GC Holdings, LLC, Business Services 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15],[16],[19] 212,000 [7],[11],[20]
Investment, Identifier [Axis]: ORG GC Holdings, LLC, Business Services 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11],[20]     0
Investment, Identifier [Axis]: ORG GC Holdings, LLC, Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   584,000 584,000
Investment, Identifier [Axis]: OZLM, Ltd. 16-15A DR      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,912,000  
Investment, Identifier [Axis]: OZLM, Ltd. 16-15A DR, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,909,000
Investment, Identifier [Axis]: Ocean Trails CLO 22-12A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,195,000  
Investment, Identifier [Axis]: Ocean Trails CLO 22-12A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,188,000
Investment, Identifier [Axis]: Odessa Technologies, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,676,000 2,676,000
Investment, Identifier [Axis]: Odessa Technologies, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   3,747,000 3,747,000
Investment, Identifier [Axis]: Odessa Technologies, Inc., Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   14,066,000 [3],[4] 14,113,000 [6],[7]
Investment, Identifier [Axis]: PG&E Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,557,000  
Investment, Identifier [Axis]: PG&E Corp., Utilities      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     10,616,000
Investment, Identifier [Axis]: PSKW, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   28,700,000 [3],[4],[5] 28,788,000 [6],[7],[8]
Investment, Identifier [Axis]: Palmer Square CLO, Ltd. 21-4A F      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,432,000  
Investment, Identifier [Axis]: Palmer Square CLO, Ltd. 21-4A F, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,430,000
Investment, Identifier [Axis]: Pathway Vet Alliance, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,961,000  
Investment, Identifier [Axis]: Pathway Vet Alliance, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,976,000
Investment, Identifier [Axis]: Paysafe Finance, PLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   400,000  
Investment, Identifier [Axis]: Paysafe Finance, PLC, Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     400,000
Investment, Identifier [Axis]: PennantPark Credit Opportunities Fund II, LP, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   751,000 [9],[15],[21] 826,000 [10],[11],[18]
Investment, Identifier [Axis]: Peraton Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,875,000  
Investment, Identifier [Axis]: Peraton Corp., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,886,000
Investment, Identifier [Axis]: PetVet Care Centers, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,533,000 [3] 3,532,000 [6],[7]
Investment, Identifier [Axis]: Pie Buyer, Inc., Food & Beverage      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   6,037,000  
Investment, Identifier [Axis]: Pie Buyer, Inc., Food & Beverage 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   552,000 [4] 2,042,000 [7],[8]
Investment, Identifier [Axis]: Pie Buyer, Inc., Food & Beverage 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,460,000 [4] 27,437,000 [7],[8]
Investment, Identifier [Axis]: Pie Buyer, Inc., Food & Beverage 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,036,000 [4],[5] 6,068,000 [7]
Investment, Identifier [Axis]: Pie Buyer, Inc., Food & Beverage 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   27,367,000 [4],[5] 460,000 [7]
Investment, Identifier [Axis]: Pie Buyer, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   5,753,000 7,213,000
Investment, Identifier [Axis]: Pie Buyer, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,288,000 1,380,000
Investment, Identifier [Axis]: PlayPower, Inc., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   23,418,000 [3],[4],[5] 23,525,000 [6],[7],[8]
Investment, Identifier [Axis]: Pluralsight, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   801,000 801,000
Investment, Identifier [Axis]: Pluralsight, LLC, Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   801,000  
Investment, Identifier [Axis]: Pluralsight, LLC, Software/Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   18,590,000 [3],[4] 18,559,000 [6],[7]
Investment, Identifier [Axis]: Pluralsight, LLC, Software/Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,640,000 [3],[4] 6,628,000 [6],[7]
Investment, Identifier [Axis]: Pluralsight, LLC, Software/Services 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     801,000
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC, Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   967,000 4,244,000
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC, Telecom      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   7,059,000  
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC, Telecom 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   18,692,000 [3],[4] 18,753,000 [6],[7]
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC, Telecom 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,550,000 [4],[15],[16] 3,810,000 [7]
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC, Telecom 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11],[17]     2,550,000
Investment, Identifier [Axis]: Polaris Newco, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,924,000  
Investment, Identifier [Axis]: Polaris Newco, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,931,000
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[19]   24,000,000  
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[19]   37,993,000  
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[19]   1,000,000  
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC, Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[16],[19]   81,786,000  
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC, Financials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[20]     15,086,000
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC, Financials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[20]     37,982,000
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC, Financials 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[17],[20]     81,787,000
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC, Subordinated Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   19,000,000 8,914,000
Investment, Identifier [Axis]: Power Stop, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,504,000  
Investment, Identifier [Axis]: Power Stop, LLC, Transportation      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,520,000
Investment, Identifier [Axis]: Premier Global Services, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   73,000 73,000
Investment, Identifier [Axis]: Premier Global Services, Inc., Telecom 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[14]     4,908,000
Investment, Identifier [Axis]: Premier Global Services, Inc., Telecom 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,908,000 [4],[13] 969,000 [7],[14]
Investment, Identifier [Axis]: Premier Global Services, Inc., Telecom 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[13]   969,000  
Investment, Identifier [Axis]: Project Accelerate Parent, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   15,540,000  
Investment, Identifier [Axis]: Project Accelerate Parent, LLC, Technology      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     14,823,000
Investment, Identifier [Axis]: Project Boost Purchaser, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,848,000 [4] 1,848,000 [7]
Investment, Identifier [Axis]: Proofpoint, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,363,000  
Investment, Identifier [Axis]: Proofpoint, Inc., Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   7,812,000  
Investment, Identifier [Axis]: Proofpoint, Inc., Software/Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6]     7,809,000
Investment, Identifier [Axis]: Proofpoint, Inc., Software/Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     6,395,000
Investment, Identifier [Axis]: Protective Industrial Products, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   8,953,000  
Investment, Identifier [Axis]: Protective Industrial Products, Inc., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     8,999,000
Investment, Identifier [Axis]: Pug, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,801,000  
Investment, Identifier [Axis]: Pug, LLC, Technology      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,814,000
Investment, Identifier [Axis]: Questex, Inc., Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   15,199,000 [3],[4],[5] 15,416,000 [6],[7],[8]
Investment, Identifier [Axis]: Questex, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,584,000 2,584,000
Investment, Identifier [Axis]: QuickBase, Inc., Technology      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,414,000 [4] 7,404,000 [7]
Investment, Identifier [Axis]: Quikrete Holdings, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,863,000  
Investment, Identifier [Axis]: Quikrete Holdings, Inc., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,901,000
Investment, Identifier [Axis]: REP TEC Intermediate Holdings, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   699,000 835,000
Investment, Identifier [Axis]: REP TEC Intermediate Holdings, Inc., Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   655,000  
Investment, Identifier [Axis]: REP TEC Intermediate Holdings, Inc., Software/Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   28,074,000 [3],[4],[5] 28,147,000 [6],[7],[8]
Investment, Identifier [Axis]: REP TEC Intermediate Holdings, Inc., Software/Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     519,000
Investment, Identifier [Axis]: RMP Group, Inc., Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   164,000 [4],[15],[16] 164,000 [7],[11],[17]
Investment, Identifier [Axis]: RSC Acquisition, Inc), Financials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[8]     15,178,000
Investment, Identifier [Axis]: RSC Acquisition, Inc), Financials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     1,484,000
Investment, Identifier [Axis]: RSC Acquisition, Inc., Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[5]   15,100,000  
Investment, Identifier [Axis]: RSC Acquisition, Inc., Financials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   706,000  
Investment, Identifier [Axis]: RSC Acquisition, Inc., Financials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   3,854,000  
Investment, Identifier [Axis]: RSC Acquisition, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   493,000 3,585,000
Investment, Identifier [Axis]: RXB Holdings, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,074,000  
Investment, Identifier [Axis]: RXB Holdings, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     10,134,000
Investment, Identifier [Axis]: RealPage, Inc. , Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [8]     13,485,000
Investment, Identifier [Axis]: RealPage, Inc., Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [5]   13,498,000  
Investment, Identifier [Axis]: Recess Holdings, Inc., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   16,055,000 [3],[4] 16,038,000 [6],[7]
Investment, Identifier [Axis]: Reddy Ice Corp., Food & Beverage      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4],[5]   18,664,000  
Investment, Identifier [Axis]: Reddy Ice Corp., Food & Beverage 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,766,000 [4] 1,776,000 [7]
Investment, Identifier [Axis]: Reddy Ice Corp., Food & Beverage 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,454,000 [4] 1,461,000 [7]
Investment, Identifier [Axis]: Reddy Ice Corp., Food & Beverage 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,790,000 [4] 4,814,000 [7]
Investment, Identifier [Axis]: Reddy Ice Corp., Food & Beverage 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   493,000 [4] 18,714,000 [6],[7],[8]
Investment, Identifier [Axis]: Reddy Ice Corp., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,269,000 1,762,000
Investment, Identifier [Axis]: Regatta II Funding, LP 13-2A DR2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,936,000  
Investment, Identifier [Axis]: Regatta II Funding, LP 13-2A DR2, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,931,000
Investment, Identifier [Axis]: Regionalcare Hospital Partners Holdings, Inc., Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,000,000
Investment, Identifier [Axis]: Regionalcare Hospital Partners Holdings, Inc., Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     5,210,000
Investment, Identifier [Axis]: Relativity Oda, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   464,000 464,000
Investment, Identifier [Axis]: Relativity Oda, LLC, Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,352,000 [4],[5] 5,225,000 [7],[8]
Investment, Identifier [Axis]: Renaissance Learning, Inc., Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,935,000
Investment, Identifier [Axis]: Roadsafe Holdings, Inc., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   10,093,000  
Investment, Identifier [Axis]: Roadsafe Holdings, Inc., Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,611,000 [4],[5] 6,797,000 [7]
Investment, Identifier [Axis]: Roadsafe Holdings, Inc., Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[8]     7,639,000
Investment, Identifier [Axis]: Roadsafe Holdings, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments     3,343,000
Investment, Identifier [Axis]: Roper Industrial Products Investment Co., LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,398,000  
Investment, Identifier [Axis]: S&S Holdings, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,686,000  
Investment, Identifier [Axis]: S&S Holdings, LLC, Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     6,715,000
Investment, Identifier [Axis]: SCIH Salt Holdings, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,644,000  
Investment, Identifier [Axis]: SCIH Salt Holdings, Inc., Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     1,123,000
Investment, Identifier [Axis]: SCIH Salt Holdings, Inc., Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,667,000
Investment, Identifier [Axis]: SCIH Salt Holdings, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   3,746,000 2,623,000
Investment, Identifier [Axis]: SFR Group, SA, Telecom      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     12,380,000
Investment, Identifier [Axis]: SSH Group Holdings, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,099,000  
Investment, Identifier [Axis]: SSH Group Holdings, Inc., Education      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   10,083,000  
Investment, Identifier [Axis]: SSH Group Holdings, Inc., Education 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     10,077,000
Investment, Identifier [Axis]: SSH Group Holdings, Inc., Education 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     10,130,000
Investment, Identifier [Axis]: STRIPER BUYER, LLC, Paper & Packaging      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7]     12,184,000
Investment, Identifier [Axis]: Safe Fleet Holdings, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,369,000  
Investment, Identifier [Axis]: Safe Fleet Holdings, LLC, Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,407,000
Investment, Identifier [Axis]: Safety Products/JHC Acquisition Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   885,000  
Investment, Identifier [Axis]: Safety Products/JHC Acquisition Corp. 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   16,530,000  
Investment, Identifier [Axis]: Safety Products/JHC Acquisition Corp., Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     16,536,000
Investment, Identifier [Axis]: Safety Products/JHC Acquisition Corp., Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     888,000
Investment, Identifier [Axis]: Saranac CLO, Ltd. 20-8A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,442,000  
Investment, Identifier [Axis]: Saranac CLO, Ltd. 20-8A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,442,000
Investment, Identifier [Axis]: Saturn SHC Buyer Holdings, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   32,344,000  
Investment, Identifier [Axis]: Saturn SHC Buyer Holdings, Inc., Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7]     32,454,000
Investment, Identifier [Axis]: Saturn SHC Buyer Holdings, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   8,886,000 8,886,000
Investment, Identifier [Axis]: Schenectady International Group, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   19,653,000  
Investment, Identifier [Axis]: Schenectady International Group, Inc., Chemicals      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     19,631,000
Investment, Identifier [Axis]: Sculptor CLO, Ltd. 27A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,461,000  
Investment, Identifier [Axis]: Sculptor CLO, Ltd. 27A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,459,000
Investment, Identifier [Axis]: Sherlock Buyer Corp., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,814,000 [4],[5] 10,852,000 [7],[8]
Investment, Identifier [Axis]: Sherlock Buyer Corp., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   3,209,000 3,209,000
Investment, Identifier [Axis]: Sherlock Buyer Corp., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,284,000 1,284,000
Investment, Identifier [Axis]: Siena Capital Finance, LLC, Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[19]   42,499,000  
Investment, Identifier [Axis]: Siena Capital Finance, LLC, Financials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   74,500,000 [4],[19] 76,995,000 [7],[25]
Investment, Identifier [Axis]: Siena Capital Finance, LLC, Financials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[20],[25]     42,499,000
Investment, Identifier [Axis]: Sierra Acquisition, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,883,000  
Investment, Identifier [Axis]: Sierra Acquisition, Inc., Food & Beverage      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,724,000
Investment, Identifier [Axis]: Simplifi Holdings, Inc., Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   946,000 [4] 34,550,000 [6],[7]
Investment, Identifier [Axis]: Simplifi Holdings, Inc., Media/Entertainment 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   34,433,000  
Investment, Identifier [Axis]: Simplifi Holdings, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,836,000 3,782,000
Investment, Identifier [Axis]: Skillsoft Corp, Technology      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [11],[34]     2,636,000
Investment, Identifier [Axis]: Skillsoft Corp., Technology      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,352,000 [3] 1,357,000 [6]
Investment, Identifier [Axis]: Skillsoft Corp., Technology 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [15],[35]   2,636,000  
Investment, Identifier [Axis]: Smile Brands, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15] 0 [7],[11]
Investment, Identifier [Axis]: Sophia, LP      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,961,000  
Investment, Identifier [Axis]: Sophia, LP, Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,976,000
Investment, Identifier [Axis]: Sotera Health Holdings, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,121,000  
Investment, Identifier [Axis]: Sound Point CLO, Ltd. 17-1A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,658,000  
Investment, Identifier [Axis]: Sound Point CLO, Ltd. 17-1A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,634,000
Investment, Identifier [Axis]: Sound Point CLO, Ltd. 17-2A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,107,000  
Investment, Identifier [Axis]: Sound Point CLO, Ltd. 17-2A E Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,092,000
Investment, Identifier [Axis]: Sound Point CLO, Ltd. 18-3A D      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   910,000  
Investment, Identifier [Axis]: Sound Point CLO, Ltd. 18-3A D, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     906,000
Investment, Identifier [Axis]: Squan Holding Corp., Telecom      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15] 0 [7],[11]
Investment, Identifier [Axis]: St. Croix Hospice Acquisition Corp., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   2,794,000  
Investment, Identifier [Axis]: St. Croix Hospice Acquisition Corp., Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   25,010,000 [4],[5] 2,809,000 [7]
Investment, Identifier [Axis]: St. Croix Hospice Acquisition Corp., Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[8]     25,096,000
Investment, Identifier [Axis]: St. Croix Hospice Acquisition Corp., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,256,000 2,256,000
Investment, Identifier [Axis]: Staples, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,837,000  
Investment, Identifier [Axis]: Staples, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,856,000
Investment, Identifier [Axis]: Striper Buyer, LLC, Paper & Packaging      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   12,132,000  
Investment, Identifier [Axis]: Subsea Global Solutions, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   963,000  
Investment, Identifier [Axis]: Subsea Global Solutions, LLC, Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,709,000 [4] 4,643,000 [7],[8]
Investment, Identifier [Axis]: Subsea Global Solutions, LLC, Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,610,000 [4],[5] 7,054,000 [7],[8]
Investment, Identifier [Axis]: Subsea Global Solutions, LLC, Business Services 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,001,000 [4],[5] 905,000 [7]
Investment, Identifier [Axis]: Subsea Global Solutions, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments     58,000
Investment, Identifier [Axis]: SunMed Group Holdings, LLC, Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   8,808,000 [3],[4] 8,841,000 [6],[7]
Investment, Identifier [Axis]: SunMed Group Holdings, LLC, Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     288,000
Investment, Identifier [Axis]: SunMed Group Holdings, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   601,000 313,000
Investment, Identifier [Axis]: Symphony CLO, Ltd. 2012-9A ER2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,791,000  
Investment, Identifier [Axis]: Symphony CLO, Ltd. 2012-9A ER2, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,784,000
Investment, Identifier [Axis]: Tap Rock Resources, LLC, Energy      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[17],[18],[36]     0
Investment, Identifier [Axis]: Tap Rock Resources, LLC, Equity/Other, Equity      
Schedule of Investments [Line Items]      
Unfunded commitments     11,114,000
Investment, Identifier [Axis]: Tax Defense Network, LLC, Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[15],[21]   425,000  
Investment, Identifier [Axis]: Tax Defense Network, LLC, Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[13],[21]   3,833,000  
Investment, Identifier [Axis]: Tax Defense Network, LLC, Consumer 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,986,000 [4],[13],[21] 3,833,000 [7],[14],[18]
Investment, Identifier [Axis]: Tax Defense Network, LLC, Consumer 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   21,646,000 [4],[13],[21] 2,986,000 [7],[14],[18]
Investment, Identifier [Axis]: Tax Defense Network, LLC, Consumer 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15],[21] 21,646,000 [7],[14],[18]
Investment, Identifier [Axis]: Tax Defense Network, LLC, Consumer 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11],[18]     425,000
Investment, Identifier [Axis]: Tax Defense Network, LLC, Consumer 5      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[11],[18]     0
Investment, Identifier [Axis]: Team Health Holdings, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,258,000  
Investment, Identifier [Axis]: Team Health Holdings, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,603,000
Investment, Identifier [Axis]: Tecta America Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,973,000  
Investment, Identifier [Axis]: Tecta America Corp. 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   8,890,000  
Investment, Identifier [Axis]: Tecta America Corp., Industrials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     8,931,000
Investment, Identifier [Axis]: Tecta America Corp., Industrials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,973,000
Investment, Identifier [Axis]: Tenet Healthcare Corp., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,707,000
Investment, Identifier [Axis]: Tennenbaum Waterman Fund, LP, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,000,000 [9],[21] 10,000,000 [10],[18]
Investment, Identifier [Axis]: The Dun & Bradstreet Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,670,000  
Investment, Identifier [Axis]: The Dun & Bradstreet Corp., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,699,000
Investment, Identifier [Axis]: The NPD Group, LP, Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   33,950,000 [4] 33,577,000 [7]
Investment, Identifier [Axis]: The NPD Group, LP, Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   154,000 [4] 231,000 [7]
Investment, Identifier [Axis]: The NPD Group, LP, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,768,000 1,691,000
Investment, Identifier [Axis]: Therapy Brands Holdings, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   4,293,000  
Investment, Identifier [Axis]: Therapy Brands Holdings, LLC, Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7]     4,314,000
Investment, Identifier [Axis]: Therapy Brands Holdings, LLC, Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,630,000 [3],[4] 4,628,000 [6],[7]
Investment, Identifier [Axis]: Travelpro Products, Inc., Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   506,000 [4],[9],[15] 506,000 [7],[10],[11]
Investment, Identifier [Axis]: Travelpro Products, Inc., Consumer 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[10]     2,983,000
Investment, Identifier [Axis]: Travelpro Products, Inc., Consumer 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4],[9]   3,013,000  
Investment, Identifier [Axis]: Travelpro Products, Inc., Consumer 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,698,000 [4],[9],[37] 2,671,000 [7],[10],[38]
Investment, Identifier [Axis]: Traverse Midstream Partners, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   13,038,000  
Investment, Identifier [Axis]: Traverse Midstream Partners, LLC, Energy      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     13,405,000
Investment, Identifier [Axis]: Trimaran CAVU 2021-2A, Ltd. 21-2A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,947,000  
Investment, Identifier [Axis]: Trimaran CAVU 2021-2A, Ltd. 21-2A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,945,000
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   4,110,000  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   20,152,000 [3],[4] 3,836,000 [7]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7]     20,118,000
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments     3,138,000
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Senior Secured First Lien Debt, Delayed draw term loan 1      
Schedule of Investments [Line Items]      
Unfunded commitments   2,864,000  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Senior Secured First Lien Debt, Delayed draw term loan 2      
Schedule of Investments [Line Items]      
Unfunded commitments   9,302,000  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,993,000 1,993,000
Investment, Identifier [Axis]: Triple Lift, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,035,000 2,035,000
Investment, Identifier [Axis]: Triple Lift, Inc., Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   1,265,000  
Investment, Identifier [Axis]: Triple Lift, Inc., Software/Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   27,719,000 [4],[5] 1,265,000 [7]
Investment, Identifier [Axis]: Triple Lift, Inc., Software/Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7],[8]     27,819,000
Investment, Identifier [Axis]: Triton Water Holdings, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,338,000  
Investment, Identifier [Axis]: Triton Water Holdings, Inc., Food & Beverage      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,373,000
Investment, Identifier [Axis]: Truck Hero, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,464,000  
Investment, Identifier [Axis]: Truck Hero, Inc., Transportation      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,471,000
Investment, Identifier [Axis]: Trysail CLO, Ltd. 21-1A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,450,000  
Investment, Identifier [Axis]: Trysail CLO, Ltd. 21-1A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,448,000
Investment, Identifier [Axis]: UKG, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,504,000  
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   4,821,000  
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,447,000 [4] 3,525,000 [7]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   11,995,000 [3],[4] 11,975,000 [6],[7]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,755,000  
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Senior Secured First Lien Debt, Delayed draw term loan 1      
Schedule of Investments [Line Items]      
Unfunded commitments     4,202,000
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Senior Secured First Lien Debt, Delayed draw term loan 2      
Schedule of Investments [Line Items]      
Unfunded commitments     1,296,000
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,167,000 1,167,000
Investment, Identifier [Axis]: US Salt Investors, LLC, Chemicals      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   19,545,000 [4] 19,616,000 [7]
Investment, Identifier [Axis]: US Salt Investors, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,169,000 2,169,000
Investment, Identifier [Axis]: USASF Holdco, LLC, Financials 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,000 [4],[15],[16] 10,000 [7],[11],[17]
Investment, Identifier [Axis]: USASF Holdco, LLC, Financials 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   490,000 [4],[15],[16] 490,000 [7],[11],[17]
Investment, Identifier [Axis]: USASF Holdco, LLC, Financials 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   139,000 [4],[15],[16] 139,000 [7],[11],[17]
Investment, Identifier [Axis]: USIC Holdings, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,755,000 [3],[4] 5,751,000 [6],[7]
Investment, Identifier [Axis]: Ultimate Software Group, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,175,000  
Investment, Identifier [Axis]: United Airlines, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   444,000  
Investment, Identifier [Axis]: United Airlines, Inc. 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,966,000  
Investment, Identifier [Axis]: United Airlines, Inc., Transportation 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     440,000
Investment, Identifier [Axis]: United Airlines, Inc., Transportation 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,745,000
Investment, Identifier [Axis]: United Biologics, LLC, Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   132,000 [4],[15],[16] 132,000 [7],[11],[17]
Investment, Identifier [Axis]: United Biologics, LLC, Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15],[16] 0 [7],[11],[17]
Investment, Identifier [Axis]: United Biologics, LLC, Healthcare 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   31,000 [4],[15],[16] 31,000 [7],[11],[17]
Investment, Identifier [Axis]: United Biologics, LLC, Healthcare 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15],[16] 0 [7],[11],[17]
Investment, Identifier [Axis]: United Biologics, LLC, Healthcare 5      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   35,000 [4],[15],[16] 35,000 [7],[11],[17]
Investment, Identifier [Axis]: University Support Services, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,910,000  
Investment, Identifier [Axis]: University Support Services, LLC, Education      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,933,000
Investment, Identifier [Axis]: University of St. Augustine Acquisition Corp., Education      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   22,943,000 [3],[4],[5] 23,021,000 [6],[7],[8]
Investment, Identifier [Axis]: University of St. Augustine Acquisition Corp., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,615,000 2,615,000
Investment, Identifier [Axis]: Urban One, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,128,000  
Investment, Identifier [Axis]: Urban One, Inc., Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [9]   1,561,000  
Investment, Identifier [Axis]: Urban One, Inc., Media/Entertainment 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,561,000
Investment, Identifier [Axis]: Urban One, Inc., Media/Entertainment 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     5,140,000
Investment, Identifier [Axis]: Vantage Mobility International, LLC, Transportation 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   251,000 [4],[13],[21] 251,000 [7],[14],[18]
Investment, Identifier [Axis]: Vantage Mobility International, LLC, Transportation 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   244,000 [4],[13],[21] 244,000 [7],[14],[18]
Investment, Identifier [Axis]: Vantage Mobility International, LLC, Transportation 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   17,000 [4],[13],[21] 17,000 [7],[14],[18]
Investment, Identifier [Axis]: Vantage Mobility International, LLC, Transportation 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,914,000 [4],[13],[21] 2,914,000 [7],[14],[18]
Investment, Identifier [Axis]: Vantage Mobility International, LLC, Transportation 5      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15],[21] 0 [7],[11],[18]
Investment, Identifier [Axis]: Vantage Mobility International, LLC, Transportation 6      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,140,000 [4],[15],[21] 3,140,000 [7],[11],[18]
Investment, Identifier [Axis]: Vantage Mobility International, LLC, Transportation 7      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15],[21] 0 [7],[11],[18]
Investment, Identifier [Axis]: Venga Finance SARL      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,860,000  
Investment, Identifier [Axis]: Venga Finance Sarl, Telecom      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,878,000
Investment, Identifier [Axis]: Vensure Employer Services, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   11,767,000 [4],[5] 11,819,000 [7],[8]
Investment, Identifier [Axis]: Venture CDO, Ltd. 16-23A ER2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,919,000  
Investment, Identifier [Axis]: Venture CDO, Ltd. 16-23A ER2 , Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,916,000
Investment, Identifier [Axis]: Venture CDO, Ltd. 16-25A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   1,953,000  
Investment, Identifier [Axis]: Venture CDO, Ltd. 16-25A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     1,949,000
Investment, Identifier [Axis]: Venture CDO, Ltd. 20-39A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,963,000  
Investment, Identifier [Axis]: Venture CDO, Ltd. 20-39A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     4,962,000
Investment, Identifier [Axis]: Venture CLO 43, Ltd. 21-43A E      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,920,000  
Investment, Identifier [Axis]: Venture CLO 43, Ltd. 21-43A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,918,000
Investment, Identifier [Axis]: Veritext Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,413,000  
Investment, Identifier [Axis]: Veritext Corp., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     3,426,000
Investment, Identifier [Axis]: Victors CCC Buyer, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   16,577,000 [4] 16,636,000 [7]
Investment, Identifier [Axis]: Victors CCC Buyer, LLC, Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   477,000  
Investment, Identifier [Axis]: Victors CCC Buyer, LLC, Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   4,391,000 4,391,000
Investment, Identifier [Axis]: Victors CCC Buyer, LLC, Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,702,000 3,179,000
Investment, Identifier [Axis]: Victory Buyer, LLC, Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   31,427,000 [4] 31,407,000 [7]
Investment, Identifier [Axis]: Vyaire Medical, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,630,000  
Investment, Identifier [Axis]: Vyaire Medical, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     6,478,000
Investment, Identifier [Axis]: WHCG Purchaser III, Inc., Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   28,565,000  
Investment, Identifier [Axis]: WHCG Purchaser III, Inc., Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,042,000 [4] 28,669,000 [6],[7]
Investment, Identifier [Axis]: WHCG Purchaser III, Inc., Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   4,213,000 [4] 7,078,000 [7]
Investment, Identifier [Axis]: WHCG Purchaser III, Inc., Healthcare 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     1,426,000
Investment, Identifier [Axis]: WHCG Purchaser III, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments     6,579,000
Investment, Identifier [Axis]: WHCG Purchaser III, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   11,000 2,798,000
Investment, Identifier [Axis]: WIN Holdings III Corp., Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [3],[4]   29,356,000  
Investment, Identifier [Axis]: WIN Holdings III Corp., Consumer 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [6],[7]     30,814,000
Investment, Identifier [Axis]: WIN Holdings III Corp., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   4,448,000 4,448,000
Investment, Identifier [Axis]: WMG Acquisition Corp.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   399,000  
Investment, Identifier [Axis]: WMG Acquisition Corp., Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     394,000
Investment, Identifier [Axis]: WMG Holdings, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     809,000
Investment, Identifier [Axis]: WMK, LLC, Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   335,000  
Investment, Identifier [Axis]: WMK, LLC, Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,618,000 [4] 2,526,000 [7],[8]
Investment, Identifier [Axis]: WMK, LLC, Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   10,735,000 [4] 347,000 [7]
Investment, Identifier [Axis]: WMK, LLC, Business Services 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,459,000 [4] 17,838,000 [6],[7],[8]
Investment, Identifier [Axis]: WMK, LLC, Business Services 4      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   17,194,000 [3],[4],[5] 2,618,000 [7]
Investment, Identifier [Axis]: WMK, LLC, Business Services 5      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,433,000 [4],[5] 11,118,000 [7]
Investment, Identifier [Axis]: WMK, LLC, Business Services 6      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,500,000 [4],[5] 3,627,000 [7],[8]
Investment, Identifier [Axis]: WMK, LLC, Business Services 7      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [7]     7,690,000
Investment, Identifier [Axis]: WPNT, LLC, Media/Entertainment      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15],[16],[19] 0 [7],[11],[17],[20]
Investment, Identifier [Axis]: WWEX UNI TopCo Holdings, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,385,000  
Investment, Identifier [Axis]: WaterBridge Midstream Operating, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,921,000  
Investment, Identifier [Axis]: WaterBridge Midstream Operating, LLC, Energy      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,878,000
Investment, Identifier [Axis]: Watlow Electric Manufacturing Co., Industrials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     9,340,000
Investment, Identifier [Axis]: Watlow Electric Manufacturing, Co.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   9,297,000  
Investment, Identifier [Axis]: West Coast Dental Services, Inc., Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   810,000 [4] 255,000 [7]
Investment, Identifier [Axis]: West Coast Dental Services, Inc., Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   19,377,000 [4] 19,446,000 [7]
Investment, Identifier [Axis]: West Coast Dental Services, Inc., Healthcare 3      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   679,000  
Investment, Identifier [Axis]: West Coast Dental Services, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   2,717,000 3,396,000
Investment, Identifier [Axis]: West Coast Dental Services, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   1,737,000 2,292,000
Investment, Identifier [Axis]: Western Dental Services, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   8,933,000  
Investment, Identifier [Axis]: Western Dental Services, Inc. 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   913,000  
Investment, Identifier [Axis]: Western Dental Services, Inc., Healthcare 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     8,978,000
Investment, Identifier [Axis]: Western Dental Services, Inc., Healthcare 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     917,000
Investment, Identifier [Axis]: Westwood Professional Services, Inc., Business Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [4]   2,705,000  
Investment, Identifier [Axis]: Westwood Professional Services, Inc., Business Services 1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   8,418,000 [4],[5] 1,007,000 [7]
Investment, Identifier [Axis]: Westwood Professional Services, Inc., Business Services 2      
Schedule of Investments [Line Items]      
Investments at Amortized Cost [5],[7]     8,444,000
Investment, Identifier [Axis]: Westwood Professional Services, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   318,000 2,016,000
Investment, Identifier [Axis]: Westwood Professional Services, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   378,000 378,000
Investment, Identifier [Axis]: Whitehorse, Ltd. 2014-1A E, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,427,000 [4],[9],[21] 8,076,000 [7],[10],[18]
Investment, Identifier [Axis]: Whitehorse, Ltd. 2014-1A SUB, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   6,965,000 [4],[9],[21],[32] 6,965,000 [7],[10],[18],[33]
Investment, Identifier [Axis]: Whitehorse, Ltd. 2014-1A Side Letter, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   134,000 [4],[9],[21] 134,000 [7],[10],[18]
Investment, Identifier [Axis]: Wilsonart, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   7,334,000  
Investment, Identifier [Axis]: Wilsonart, LLC, Consumer      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     7,370,000
Investment, Identifier [Axis]: Wind River CLO, Ltd. 14-2A FR      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,549,000  
Investment, Identifier [Axis]: Wind River CLO, Ltd. 14-2A FR, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,530,000
Investment, Identifier [Axis]: Windsor Holdings III, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,252,000  
Investment, Identifier [Axis]: World Business Lenders, LLC, Financials      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,750,000 [4],[15] 3,750,000 [7],[11]
Investment, Identifier [Axis]: Wythe Will Tzetzo, LLC, Food & Beverage      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   302,000 [4],[15],[16] 302,000 [7],[11],[17]
Investment, Identifier [Axis]: YI, LLC      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   5,587,000  
Investment, Identifier [Axis]: YI, LLC, Healthcare      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     8,524,000
Investment, Identifier [Axis]: YummyEarth, Inc., Food & Beverage      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   0 [4],[15] 0 [7],[11]
Investment, Identifier [Axis]: Zais CLO 13, Ltd. 19-13A D1      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   2,751,000  
Investment, Identifier [Axis]: Zais CLO 13, Ltd. 19-13A D1, Diversified Investment Vehicles      
Schedule of Investments [Line Items]      
Investments at Amortized Cost     2,741,000
Investment, Identifier [Axis]: Zayo Group Holdings, Inc.      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   3,419,000  
Investment, Identifier [Axis]: Zendesk, Inc., Senior Secured First Lien Debt, Delayed draw term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   10,700,000 10,700,000
Investment, Identifier [Axis]: Zendesk, Inc., Senior Secured First Lien Debt, Revolver term loan      
Schedule of Investments [Line Items]      
Unfunded commitments   4,406,000 4,406,000
Investment, Identifier [Axis]: Zendesk, Inc., Software/Services      
Schedule of Investments [Line Items]      
Investments at Amortized Cost   $ 42,406,000 [4] $ 41,961,000 [7]
FBLC Senior Loan Fund, LLC      
Schedule of Investments [Line Items]      
Ownership percent 87.50% 79.80% 79.80%
FBLC Senior Loan Fund, LLC | Cliffwater Corporate Lending Fund ("CCLF")      
Schedule of Investments [Line Items]      
Ownership percent 12.50% 20.20% 20.20%
Financial Asset, Past Due      
Schedule of Investments [Line Items]      
Number of portfolio companies on non-accrual status | company   6 5
Amortized cost   $ 52,200,000 $ 44,600,000
Fair value   $ 12,000,000.0 $ 8,200,000
Financial Asset, Past Due | Investment Owner, At Amortized Cost | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Percent of investments in non-accrual status at amortized cost   1.80% 1.50%
Financial Asset, Past Due | Investment Owned, At Fair Value | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Percent of investments in non-accrual status at fair value   0.40% 0.30%
[1] Percentages are based on net assets as of June 30, 2023.
[2] Percentages are based on net assets as of December 31, 2022.
[3] The Company's investment or a portion thereof is pledged as collateral under the JPM Credit Facility. Individual investments can be divided into parts which are pledged to separate credit facilities.
[4] The fair value of investments with respect to securities for which market quotations are not readily available is determined in good faith by the Company's Board of Directors as required by the 1940 Act. Such investments are valued using significant unobservable inputs (See Note 3 to the consolidated financial statements).
[5] The Company's investment or a portion thereof is pledged as collateral under the Wells Fargo Credit Facility. Individual investments can be divided into parts which are pledged to separate credit facilities.
[6] The Company's investment or a portion thereof is pledged as collateral under the JPM Credit Facility. Individual investments can be divided into parts which are pledged to separate credit facilities.
[7] The fair value of investments with respect to securities for which market quotations are not readily available is determined in good faith by the Company's Board of Directors as required by the 1940 Act. Such investments are valued using significant unobservable inputs (See Note 3 to the consolidated financial statements).
[8] The Company's investment or a portion thereof is pledged as collateral under the Wells Fargo Credit Facility. Individual investments can be divided into parts which are pledged to separate credit facilities.
[9] All of the Company's investments, except the investments noted by this footnote, are qualifying assets under Section 55(a) of the Investment Company Act of 1940, as amended (the "1940 Act"). Under the 1940 Act, the Company may not acquire any non-qualifying asset unless, at the time the acquisition is made, qualifying assets represent at least 70% of the Company's total assets. Qualifying assets represent 85.6% of the Company's total assets. The significant majority of all investments held are deemed to be illiquid.
[10] All of the Company's investments, except the investments noted by this footnote, are qualifying assets 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 the acquisition is made, qualifying assets represent at least 70% of the Company's total assets. Qualifying assets represent 85.2% of the Company's total assets. The significant majority of all investments held are deemed to be illiquid.
[11] Non-income producing at December 31, 2022.
[12] The investment is held through BSP TCAP Acquisition Holdings LP, which is an affiliated acquisition entity. Due to certain restrictions, such as limits on the number of partners allowable within the equity structures of the newly acquired investments, these investments are still held within the acquisition entity as of December 31, 2022
[13] The investment is on non-accrual status as of June 30, 2023.
[14] The investment is on non-accrual status as of December 31, 2022.
[15] Non-income producing at June 30, 2023.
[16] Investments are held in the taxable wholly-owned, consolidated subsidiary, 54th Street Equity Holdings, Inc.
[17] Investments are held in the taxable wholly-owned, consolidated subsidiary, 54th Street Equity Holdings, Inc.
[18] The provisions of the 1940 Act classify investments further based on the level of ownership that the Company maintains in a particular portfolio company. As defined in the 1940 Act, a company is generally deemed as "non-affiliated" when the Company owns less than 5% of a portfolio company's voting securities and "affiliated" when the Company owns 5% or more of a portfolio company's voting securities. The Company classifies this investment as "affiliated".
[19] The provisions of the 1940 Act classify investments based on the level of control that the Company maintains in a particular portfolio company. As defined in the 1940 Act, a company is generally presumed to be "non-controlled" when the Company owns 25% or less of the portfolio company's voting securities and/or does not have the power to exercise control over the management or policies of such portfolio company. A company is generally presumed to be "controlled" when the Company owns more than 25% of the portfolio company's voting securities and/or has the power to exercise control over the management or policies of such portfolio company. The Company classifies this investment as "controlled".
[20] The provisions of the 1940 Act classify investments based on the level of control that the Company maintains in a particular portfolio company. As defined in the 1940 Act, a company is generally presumed to be "non-controlled" when the Company owns 25% or less of the portfolio company's voting securities and/or does not have the power to exercise control over the management or policies of such portfolio company. A company is generally presumed to be "controlled" when the Company owns more than 25% of the portfolio company's voting securities and/or has the power to exercise control over the management or policies of such portfolio company. The Company classifies this investment as "controlled".
[21] The provisions of the 1940 Act classify investments further based on the level of ownership that the Company maintains in a particular portfolio company. As defined in the 1940 Act, a company is generally deemed as "non-affiliated" when the Company owns less than 5% of a portfolio company's voting securities and "affiliated" when the Company owns 5% or more of a portfolio company's voting securities. The Company classifies this investment as "affiliated".
[22] The Company's investment is held through the consolidated subsidiary, Kahala Aviation Holdings, LLC, which owns 49% of the operating company, Danish CRJ LTD.
[23] The Company's investment is held through the Consolidated Holding Company, Kahala Aviation Holdings, LLC, which owns 49% of the operating company, Danish CRJ LTD.
[24] The Company's investment falls under the definition of a significant subsidiary, as it exceeded the threshold of at least one of the tests under Rule 4-08(g), or exceeded the threshold of at least one of the tests under Rule 3-09. See Note 3 for summarized financial information.
[25] The Company's investment falls under the definition of a significant subsidiary, as it exceeded the threshold of at least one of the tests under Rule 3-09. See Note 18 in the Notes to Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2022 and the relevant portfolio companies' audited financial statements filed as an exhibit thereto for additional disclosure.
[26] The investment is held through BSP TCAP Acquisition Holdings LP, which is an affiliated acquisition entity. Due to certain restrictions, such as limits on the number of partners allowable within the equity structures of the newly acquired investments, these investments are still held within the acquisition entity as of June 30, 2023.
[27] The Company's investment is held through the consolidated subsidiary, Kahala Aviation Holdings, LLC, which owns 100% of the equity of the operating company, Kahala Ireland OpCo Designated Activity Company.
[28] The Company's investment is held through the consolidated subsidiary, Kahala Aviation Holdings, LLC, which owns 100% of the equity of the operating company, Kahala Ireland OpCo Designated Activity Company.
[29] The Company's investment is held through the consolidated subsidiaries, Kahala Aviation Holdings, LLC and Kahala Aviation US, Inc., which own 100% of the equity of the operating company, Kahala US OpCo LLC.
[30] The Company's investment is held through the consolidated subsidiaries, Kahala Aviation Holdings, LLC and Kahala Aviation US, Inc., which own 100% of the equity of the operating company, Kahala US OpCo LLC.
[31] The majority of the investments bear interest at a rate that may be determined by reference to London Interbank Offered Rate ("LIBOR" or "L"), Secured Overnight Financing Rate ("SOFR" or "S"), or Prime ("P") and which reset daily, monthly, quarterly, or semiannually. For each, the Company has provided the spread over the relevant reference rate and the current interest rate in effect at December 31, 2022. Certain investments are subject to reference rate floors. For fixed rate loans, a spread above a reference rate is not applicable. For floating rate securities the all-in rate is disclosed within parentheses.
[32] The Collateralized Securities - subordinated notes are treated as equity investments and are entitled to recurring distributions which are generally equal to the remaining cash flow of the payments made by the underlying fund’s securities less contractual payments to debt holders and fund expenses. The estimated yield indicated is based upon a current projection of the amount and timing of these recurring distributions and the estimated amount of repayment of principal upon termination. Such projections are periodically reviewed and adjusted, and the estimated yield may not ultimately be realized.
[33] The Collateralized Securities - subordinated notes are treated as equity investments and are entitled to recurring distributions which are generally equal to the remaining cash flow of the payments made by the underlying fund’s securities less contractual payments to debt holders and fund expenses. The estimated yield indicated is based upon a current projection of the amount and timing of these recurring distributions and the estimated amount of repayment of principal upon termination. Such projections are periodically reviewed and adjusted, and the estimated yield may not ultimately be realized.
[34] The investment is not a restricted security. All other securities are restricted securities.
[35] The investment is not a restricted security. All other securities are restricted securities.
[36] The commitment related to this investment is discretionary.
[37] The principal amount (par amount) is denominated in Canadian Dollars ("CAD").
[38] The principal amount (par amount) is denominated in Canadian Dollars ("CAD").