Condensed Consolidated Schedules of Investments (Parenthetical) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023 |
Schedule of Investments [Line Items] | | | | | |
Cost | | $ 415,898 | | $ 136,308 | |
Investment owned at fair value | | $ 424,604 | | $ 137,015 | |
Investment, Identifier [Axis]: Series I Preferred Investment In Limited Liability Company Resident Solar Limited Liability Company United States | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 9.42% | | | |
Investment owned number of shares | | 12,415,855 | | | |
Investment owned at fair value | | $ 12,416 | | | |
Investment, Identifier [Axis]: Series I | Investments in Loans | Longroad High Street Holdings, LLC- SOFR +3.75% 11/30/30 | United States | Energy | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | | | 3.75% | |
Investment maturity date | | | | Nov. 30, 2030 | |
Investment owned number of shares | | | | 3,898,967 | |
Investment owned at fair value | | | | $ 3,840 | |
Investment, Identifier [Axis]: Series I | Investments in Loans | Longroad High Street Holdings, LLC- SOFR +3.75% 11/30/30 | United States | Power & Utilities | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 3.75% | | | |
Investment maturity date | | Nov. 30, 2030 | | | |
Investment owned number of shares | | 4,547,748 | | | |
Investment owned at fair value | | $ 4,553 | | | |
Investment, Identifier [Axis]: Series I | Investments in Loans | Other Infrastructure Assets | United States | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned number of shares | | 6,369,041 | | | |
Investment owned at fair value | | $ 6,369 | | | |
Investment, Identifier [Axis]: Series I | Investments in Loans | Tillman Infrastructure LLC Tranche A 16% 03/31/29 | United States | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 16% | | | |
Investment maturity date | | Mar. 31, 2029 | | | |
Investment owned number of shares | | 7,072,174 | | | |
Investment owned at fair value | | $ 6,531 | | | |
Investment, Identifier [Axis]: Series I | Investments in Loans | Tillman Infrastructure LLC Tranche B 9.75% 03/31/29 | United States | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 9.75% | | | |
Investment maturity date | | Mar. 31, 2029 | | | |
Investment owned number of shares | | 2,168,559 | | | |
Investment owned at fair value | | $ 2,079 | | | |
Investment, Identifier [Axis]: Series I | Investments in Loans | Venture Global Plaquemines LNG, LLC- SOFR+1.975 05/25/29 | United States | Power & Utilities | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 1.975% | | | |
Investment maturity date | | May 25, 2029 | | | |
Investment owned number of shares | | 7,313,782 | | | |
Investment owned at fair value | | $ 7,167 | | | |
Investment, Identifier [Axis]: Series I | Investments in Loans | Yondr Capital LP- 15.75%-17.75% 06/27/29 | Various | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment maturity date | | Jun. 27, 2029 | | Jun. 27, 2029 | |
Investment owned number of shares | | 14,574,286 | | 13,258,898 | |
Investment owned at fair value | | $ 14,732 | | $ 13,133 | |
Investment, Identifier [Axis]: Series I | Investments in Loans | Yondr Capital LP- 15.75%-17.75% 06/27/29 | Various | Communications | Minimum [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 15.75% | | 15.75% | |
Investment, Identifier [Axis]: Series I | Investments in Loans | Yondr Capital LP- 15.75%-17.75% 06/27/29 | Various | Communications | Maximum [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 17.75% | | 17.75% | |
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | AIC 3-Z Subsidiary, LLC | Various | Various | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | | $ 13,596 | [1],[2] | $ 3,872 | [3] |
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | AP Nebula Solar Aggregator, L.P. | United States | Power & Utilities | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | [1],[4] | 12,524 | | | |
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | Atlas Tank Parent, L.P. | United States | Transportation | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | [3] | | | 3,469 | |
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | Novus Holdings Parent, L.P. | United States | Transportation | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | [1] | 20,452 | | | |
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Transportation | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | [1] | 4,311 | | | |
Investment, Identifier [Axis]: Series I | Investments in Warrants | Yondr Capital LP | Various | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | | 388 | | | |
Investment, Identifier [Axis]: Series I | Total Investments - Series I (Cost of $24,187) | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | | | | 24,187 | |
Investment owned at fair value | | | | 24,314 | |
Investment, Identifier [Axis]: Series I | Total Investments - Series I (Cost of $90,629) | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | | 90,630 | | | |
Investment owned at fair value | | 92,702 | | | |
Investment, Identifier [Axis]: Series I | Total Investments in Loans | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | | 41,157 | | | |
Investment owned at fair value | | 41,431 | | 16,973 | |
Investment, Identifier [Axis]: Series I | Total Investments in Partnership Investment Vehicle | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | [1] | 49,085 | | | |
Investment owned at fair value | | 50,883 | [1] | $ 7,341 | [3] |
Investment, Identifier [Axis]: Series I | Total Investments in Warrants | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | | 388 | | | |
Investment owned at fair value | | $ 388 | | | |
Investment, Identifier [Axis]: Series II Preferred Investment In Limited Liability Company Resident Solar Limited Liability Company United States | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 10.39% | | | |
Investment owned number of shares | | 40,042,428 | | | |
Investment owned at fair value | | $ 40,042 | | | |
Investment, Identifier [Axis]: Series II | Investments in Loans | Longroad High Street Holdings, LLC- SOFR +3.75% 11/30/30 | United States | Energy | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | | | 3.75% | |
Investment maturity date | | | | Nov. 30, 2030 | |
Investment owned number of shares | | | | 18,267,699 | |
Investment owned at fair value | | | | $ 17,993 | |
Investment, Identifier [Axis]: Series II | Investments in Loans | Longroad High Street Holdings, LLC- SOFR +3.75% 11/30/30 | United States | Power & Utilities | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 3.75% | | | |
Investment maturity date | | Nov. 30, 2030 | | | |
Investment owned number of shares | | 20,452,252 | | | |
Investment owned at fair value | | $ 20,385 | | | |
Investment, Identifier [Axis]: Series II | Investments in Loans | Other Infrastructure Assets | United States | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned number of shares | | 18,630,959 | | | |
Investment owned at fair value | | $ 18,631 | | | |
Investment, Identifier [Axis]: Series II | Investments in Loans | Tillman Infrastructure LLC Tranche A 16% 03/31/29 | United States | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 16% | | | |
Investment maturity date | | Mar. 31, 2029 | | | |
Investment, Identifier [Axis]: Series II | Investments in Loans | Tillman Infrastructure LLC Tranche B 9.75% 03/31/29 | United States | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 9.75% | | | |
Investment maturity date | | Mar. 31, 2029 | | | |
Investment owned number of shares | | 6,646,746 | | | |
Investment owned at fair value | | $ 6,374 | | | |
Investment, Identifier [Axis]: Series II | Investments in Loans | Venture Global Plaquemines LNG, LLC- SOFR+1.975 05/25/29 | United States | Power & Utilities | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 1.975% | | | |
Investment maturity date | | May 25, 2029 | | | |
Investment owned number of shares | | 22,417,117 | | | |
Investment owned at fair value | | $ 20,964 | | | |
Investment, Identifier [Axis]: Series II | Investments in Loans | Yondr Capital LP- 15.75%-17.75% 06/27/29 | Various | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment maturity date | | Jun. 27, 2029 | | Jun. 27, 2029 | |
Investment owned number of shares | | 65,258,507 | | 61,319,161 | |
Investment owned at fair value | | $ 65,791 | | $ 60,745 | |
Investment, Identifier [Axis]: Series II | Investments in Loans | Yondr Capital LP- 15.75%-17.75% 06/27/29 | Various | Communications | Minimum [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 15.75% | | 15.75% | |
Investment, Identifier [Axis]: Series II | Investments in Loans | Yondr Capital LP- 15.75%-17.75% 06/27/29 | Various | Communications | Maximum [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 17.75% | | 17.75% | |
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | AIC 3-Z Subsidiary, LLC | Various | Various | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | | $ 52,467 | [1],[2] | $ 17,726 | [3] |
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | AP Nebula Solar Aggregator, L.P.| United States | Power & Utilities | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | [1],[4] | 40,372 | | | |
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | Atlas Tank Parent, L.P. | United States | Transportation | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | [3] | | | 16,237 | |
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | Novus Holdings Parent, L.P. | United States | Transportation | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | [1] | 66,731 | | | |
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Transportation | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | [1] | 19,035 | | | |
Investment, Identifier [Axis]: Series II | Investments in Warrants | Yondr Capital LP | Various | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | | 1,136 | | | |
Investment, Identifier [Axis]: Series II | Total Investments - Series II (Cost of $112,121) | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | | | | 112,121 | |
Investment owned at fair value | | | | 112,701 | |
Investment, Identifier [Axis]: Series II | Total Investments - Series II (Cost of $325,269) | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | | 325,268 | | | |
Investment owned at fair value | | 331,902 | | | |
Investment, Identifier [Axis]: Series II | Total Investments in Loans | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | | 151,267 | | | |
Investment owned at fair value | | 152,161 | | 78,738 | |
Investment, Identifier [Axis]: Series II | Total Investments in Partnership Investment Vehicle | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | [1] | 172,865 | | | |
Investment owned at fair value | | 178,605 | [1] | $ 33,963 | [3] |
Investment, Identifier [Axis]: Series II | Total Investments in Warrants | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | | 1,136 | | | |
Investment owned at fair value | | $ 1,136 | | | |
Investment, Identifier [Axis]: Total Preferred Investment In Limited Liability Company Resident Solar Limited Liability Company United States | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 10.14% | | | |
Investment owned number of shares | | 52,458,283 | | | |
Investment owned at fair value | | $ 52,458 | | | |
Investment, Identifier [Axis]: Total | Investments in Loans | Longroad High Street Holdings, LLC- SOFR +3.75% 11/30/30 | United States | Energy | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | | | 3.75% | |
Investment maturity date | | | | Nov. 30, 2030 | |
Investment owned number of shares | | | | 22,166,666 | |
Investment owned at fair value | | | | $ 21,833 | |
Investment, Identifier [Axis]: Total | Investments in Loans | Longroad High Street Holdings, LLC- SOFR +3.75% 11/30/30 | United States | Power & Utilities | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 3.75% | | | |
Investment maturity date | | Nov. 30, 2030 | | | |
Investment owned number of shares | | 25,000,000 | | | |
Investment owned at fair value | | $ 24,938 | | | |
Investment, Identifier [Axis]: Total | Investments in Loans | Other Infrastructure Assets | United States | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned number of shares | | 25,000,000 | | | |
Investment owned at fair value | | $ 25,000 | | | |
Investment, Identifier [Axis]: Total | Investments in Loans | Tillman Infrastructure LLC Tranche A 16% 03/31/29 | United States | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 16% | | | |
Investment maturity date | | Mar. 31, 2029 | | | |
Investment owned number of shares | | 28,748,749 | | | |
Investment owned at fair value | | $ 26,547 | | | |
Investment, Identifier [Axis]: Total | Investments in Loans | Tillman Infrastructure LLC Tranche B 9.75% 03/31/29 | United States | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 9.75% | | | |
Investment maturity date | | Mar. 31, 2029 | | | |
Investment owned number of shares | | 8,815,305 | | | |
Investment owned at fair value | | $ 8,453 | | | |
Investment, Identifier [Axis]: Total | Investments in Loans | Venture Global Plaquemines LNG, LLC- SOFR+1.975 05/25/29 | United States | Power & Utilities | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 1.975% | | | |
Investment maturity date | | May 25, 2029 | | | |
Investment owned number of shares | | 29,730,899 | | | |
Investment owned at fair value | | $ 28,131 | | | |
Investment, Identifier [Axis]: Total | Investments in Loans | Yondr Capital LP- 15.75%-17.75% 06/27/29 | Various | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment maturity date | | Jun. 27, 2029 | | Jun. 27, 2029 | |
Investment owned number of shares | | 79,832,793 | | 74,578,059 | |
Investment owned at fair value | | $ 80,523 | | $ 73,878 | |
Investment, Identifier [Axis]: Total | Investments in Loans | Yondr Capital LP- 15.75%-17.75% 06/27/29 | Various | Communications | Minimum [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 15.75% | | 15.75% | |
Investment, Identifier [Axis]: Total | Investments in Loans | Yondr Capital LP- 15.75%-17.75% 06/27/29 | Various | Communications | Maximum [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment interest rate | | 17.75% | | 17.75% | |
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | AIC 3-Z Subsidiary, LLC | Various | Various | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | | $ 66,063 | [1],[2] | $ 21,598 | [3] |
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | AP Nebula Solar Aggregator, L.P.| United States | Power & Utilities | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | [1],[4] | 52,896 | | | |
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | Atlas Tank Parent, L.P. | United States | Transportation | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | [3] | | | 19,706 | |
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | Novus Holdings Parent, L.P. | United States | Transportation | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | [1] | 87,183 | | | |
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Transportation | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | [1] | 23,346 | | | |
Investment, Identifier [Axis]: Total | Investments in Warrants | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | | 1,524 | | | |
Investment owned at fair value | | 1,524 | | | |
Investment, Identifier [Axis]: Total | Investments in Warrants | Yondr Capital LP | Various | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned at fair value | | 1,524 | | | |
Investment, Identifier [Axis]: Total | Total Investments (Cost of $415,898) | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | | 415,898 | | | |
Investment owned at fair value | | 424,604 | | | |
Investment, Identifier [Axis]: Total | Total Investments - Total (Cost of $136,308) | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | | | | 136,308 | |
Investment owned at fair value | | | | 137,015 | |
Investment, Identifier [Axis]: Total | Total Investments in Loans | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | | 192,424 | | | |
Investment owned at fair value | | 193,592 | | 95,711 | |
Investment, Identifier [Axis]: Total | Total Investments in Partnership Investment Vehicle | | | | | |
Schedule of Investments [Line Items] | | | | | |
Cost | [1] | 221,950 | | | |
Investment owned at fair value | | $ 229,488 | [1] | $ 41,304 | [3] |
Investment, Identifier [Axis]: eries II | Investments in Loans | Tillman Infrastructure LLC Tranche A 16% 03/31/29 | United States | Communications | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment owned number of shares | | 21,676,575 | | | |
Investment owned at fair value | | $ 20,016 | | | |
| |
[1] Partnership investment vehicle includes investments in both limited partnerships and limited liability companies. Represents an investment in an affiliated entity of the Company. Partnership investment vehicle includes investments in both limited partnerships and limited liability companies. Series I, Series II and Total indirectly own 12,415,855 , 40,042,428 , and 52,458,283 units, respectively, in Juniper 1 Residential Solar, LLC, in the renewables industry in the United States. The fair value of Series I, Series II, and Total investment in Juniper 1 Residential Solar, LLC was $ 12,416 , $ 40,042 , and $ 52,458 , respectively, and the percentage of Net Asset Value of Series I, Series II, and Total for that investment was 9.42 %, 10.39 %, and 10.14 %, respectively. | |