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Debt - Additional Information (Details) - USD ($) $ in Thousands |  |  |  |  |  |  |  | 1 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
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Jul. 25, 2024 | Dec. 15, 2023 | Dec. 15, 2022 | Dec. 15, 2021 | Dec. 15, 2020 | Apr. 06, 2018 | Apr. 05, 2018 | Apr. 30, 2025 | Feb. 28, 2025 | Dec. 31, 2024 | Feb. 29, 2024 | Oct. 31, 2021 | Mar. 31, 2021 | Mar. 31, 2020 | Sep. 30, 2019 | Nov. 30, 2017 | Mar. 31, 2025 | Mar. 31, 2024 | Sep. 30, 2024 | May 31, 2024 | Apr. 30, 2023 | Jan. 31, 2021
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annualized weighted average cost of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.80% | 7.10% |  |  |  |
Amount Borrowed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 273,790 |  | $ 443,880 |  |  |
Percentage of public offering price per notes issued |  |  |  |  |  |  |  |  |  |  |  | 101.50% | 99.40% |  |  |  |  |  |  |  |  |
Credit facility interest rate description |  |  |  |  |  |  |  |  |  | SOFR plus 225 basis points |  |  |  |  |  |  |  |  |  |  |  |
Debt securitization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300,700 | $ 297,800 | $ 300,700
Pennant Park Senior Secured Loan Fund I L L C [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount Borrowed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 271,100 |  | 146,100 |  |  |
Notes payable to members |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 271,600 |  | $ 271,600 |  |  |
Class D-R Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annualized weighted average cost of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.20% |  | 7.20% |  |  |
2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of preferred shares of securitization issuer |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Preferred shares of securitization issuer |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 55,400 |  |  |  |  |  |  |
2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset backed debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 287,000 |  | $ 287,000 |  |  |
Unamortized fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,600 |  | 2,900 |  |  |
2036-R Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Replacement Debt | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset backed debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 266,000 |  | 266,000 |  |  |
Unamortized fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 700 |  | 800 |  |  |
2036-R Asset-Backed Debt | Class A-1-R Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument | $ 203,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 1.75% |  |  |  |  |
2036-R Asset-Backed Debt | Class A-2-R Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument | 10,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 1.90% |  |  |  |
2036-R Asset-Backed Debt | Class B-R Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument | $ 12,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description | three-month SOFR plus 2.05% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 2.05%, |  |  |  |  |
2036-R Asset-Backed Debt | Class C-R Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument | $ 28,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | interest at three-month SOFR plus 2.75% |  |  |  |  |
2036-R Asset-Backed Debt | Class D-R Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument | 21,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 4.30% |  |  |  |  |
2036-R Asset-Backed Debt | B 2 Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument | 64,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2036-R Asset-Backed Debt | C 2 Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument | 12,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset backed debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 361,000 |  | 0 |  |  |
Unamortized fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,900 |  | $ 0 |  |  |
SBA Debentures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt securitization amount | $ 351,000 |  |  |  |  |  |  |  |  |  | $ 350,600 |  |  |  | 301,400 |  |  |  |  |  |  |
2026 Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes issued |  |  |  |  |  |  |  |  |  |  |  | $ 85,000 | $ 100,000 |  |  |  | $ 185,000 |  |  |  |  |
Debt instrument, interest rate |  |  |  | 4.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest payment terms |  |  |  |  |  |  |  |  |  |  |  | Interest on the 2026 Notes is paid semi-annually on April 1 and October 1 of each year, at a rate of 4.25% per year, commencing October 1, 2021. |  |  |  |  |  |  |  |  |  |
Debt instrument, periodic payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | semi-annually |  |  |  |  |
Debt instrument, maturity date |  |  |  |  | Apr. 01, 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2023 Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 138,600 |  |  |  |  |  |
Notes payable to members |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 138,600 |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.30% |  |  |  |  |  |  |  |
Interest payment terms |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Interest on the 2023 Notes was payable semi-annually in arrears on June 15 and December 15 of each year, commencing June 15, 2018. |  |  |  |  |
Debt instrument, periodic payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | four annual installments |  |  |  |  |
Percentage of original principal amount payable |  | 55.00% | 15.00% | 15.00% | 15.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate, increase (decrease) |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.80% |  |  |  |  |  |  |  |
Class A-1 Senior Secured Floating Rate Loans | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 78,500 |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 1.8% |  |  |  |  |
Class A-1 Senior Secured Floating Rate Loans | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  | 60,000 |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 3.90% |  |  |  |  |
Class A-2 Senior Secured Fixed Rate Notes due 2031 | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.70% |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 15,000 |  |  |  |  |  |  |
Class B-1 Senior Secured Floating Rate Notes due 2031 | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 14,000 |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 2.9% |  |  |  |  |
Class B-1 Senior Secured Floating Rate Notes due 2031 | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 5.90% |  |  |  |  |
Class B-2 Senior Secured Fixed Rate Notes due 2031 | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.30% |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 16,000 |  |  |  |  |  |  |
Class B-2 Senior Secured Fixed Rate Notes due 2031 | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  | 63,600 |  |  |  |  |  |  |  |  |  |  |
Class C 1 Secured Deferrable Floating Rate Notes due 2031 | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 19,000 |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 4.0% |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.00% |  |  |  |  |  |  |
Class C-2 Secured Deferrable Fixed Rate Notes due 2031 | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.40% |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,000 |  |  |  |  |  |  |
Class D Secured Deferrable Floating Rate Loans due 2031 | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18,000 |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 4.8% |  |  |  |  |
Percentage of notes issued by securitization issuer |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Class A 1 Senior Secured Floating Rate Notes due 2031 | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 77,500 |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 1.8% |  |  |  |  |
Class D Secured Deferrable Floating Rate Notes | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of notes issued by securitization issuer |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Class D Secured Deferrable Floating Rate Notes | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annualized weighted average cost of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.10% |  | 8.10% |  |  |
Class D Secured Deferrable Floating Rate Notes | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annualized weighted average cost of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.90% |  | 0.00% |  |  |
Class A1 Senior Secured Floating Rate Notes Due2036 [Member] | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  | 139,500 |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 2.30% |  |  |  |  |
Class D Secured Deferrable Floating Rate Loans Due2036 [Member] | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  | 21,000 |  |  |  |  |  |  |  |  |  |  |
Class C1 Secured Deferrable Floating Rate Notes Due2036 [Member] | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  | 28,000 |  |  |  |  |  |  |  |  |  |  |
Class B1 Senior Secured Floating Rate Notes Due2036 [Member] | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  | 24,500 |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 2.70% |  |  |  |  |
Class A1 Notes [Member] | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  | $ 220,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 1.49% |  |  |  |  |
Class A 2 Notes [Member] | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  | 19,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 1.60% |  |  |  |  |
Class C Notes | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  | 38,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 2.20% |  |  |  |  |
Class B Notes | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  | 28,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 1.75% |  |  |  |  |
Class D Notes [Member] | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  | 28,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 3.60% |  |  |  |  |
Subordinated Notes [Member] | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  | 85,100 |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 1.49% |  |  |  |  |
Class A1 LA Floating Rate [Member] | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  | 10,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Class A1 LB Floating Rate [Member] | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  | $ 45,000 |  |  |  |  |  |  |  |  |  |  |  |  |
SOFR [Member] | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.80% |  |  |  |  |
SOFR [Member] | 2036-R Asset-Backed Debt | Class A-2-R Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.90% |  |  |  |  |
SOFR [Member] | 2036-R Asset-Backed Debt | Class B-R Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate | 2.05% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SOFR [Member] | 2036-R Asset-Backed Debt | Class C-R Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate | 2.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SOFR [Member] | 2036-R Asset-Backed Debt | Class D-R Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate | 4.30% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SOFR [Member] | Class A-1 Senior Secured Floating Rate Loans | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.30% |  |  |  |  |
SOFR [Member] | Class B-1 Senior Secured Floating Rate Notes due 2031 | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.90% |  |  |  |  |  |  |
SOFR [Member] | Class B-1 Senior Secured Floating Rate Notes due 2031 | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month SOFR plus 2.90% |  |  |  |  |
SOFR [Member] | Class D Secured Deferrable Floating Rate Loans due 2031 | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.80% |  |  |  |  |  |  |
SOFR [Member] | Class A 1 Senior Secured Floating Rate Notes due 2031 | 2031 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.80% |  |  |  |  |  |  |
SOFR [Member] | Class A2 Senior Secured Fixed Rate Notes Due2036 [Member] | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |  |  |  |  | $ 14,000 |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.70% |  |  |  |  |
SOFR [Member] | Class A1 Senior Secured Floating Rate Notes Due2036 [Member] | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  |  |  | 2.30% |  |  |  |  |  |  |  |  |  |  |
SOFR [Member] | Class D Secured Deferrable Floating Rate Loans Due2036 [Member] | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  |  |  | 5.90% |  |  |  |  |  |  |  |  |  |  |
SOFR [Member] | Class A1 Notes [Member] | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  | 1.49% |  |  |  |  |  |  |  |  |  |  |  |  |
SOFR [Member] | Class A 2 Notes [Member] | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  | 60.00% |  |  |  |  |  |  |  |  |  |  |  |  |
SOFR [Member] | Class C Notes | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  | 2.20% |  |  |  |  |  |  |  | 3.90% |  |  |  |  |
SOFR [Member] | Class B Notes | 2036 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  |  |  | 2.90% |  |  |  |  |  |  |  |  |  |  |
SOFR [Member] | Class B Notes | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  | 1.75% |  |  |  |  |  |  |  |  |  |  |  |  |
SOFR [Member] | Class D Notes [Member] | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  | 3.60% |  |  |  |  |  |  |  |  |  |  |  |  |
SOFR [Member] | Subordinated Notes [Member] | 2037 Asset-Backed Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage points added to reference rate |  |  |  |  |  |  |  |  | 1.49% |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset coverage ratio requirement |  |  |  |  |  | 150.00% | 200.00% |  |  |  |  |  |  |  |  |  | 178.00% |  | 174.00% |  |  |
Truist Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annualized weighted average cost of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.60% |  | 7.50% |  |  |
Amount Borrowed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 736,000 |  |  |  |  |
Basis points description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Credit Facility bears interest at SOFR (or an alternative risk-free floating interest rate index) plus 225 basis points and, after the revolving period, the rate will reset to Base Rate (or an alternative risk-free floating interest rate index) plus 250 basis points for the remaining two years, maturing in August 2029. In April 2025, the credit facility was amended and the Company SOFR rate decreased to 200 basis points. |  |  |  |  |
Increasing the facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 636,000 |  |  |  |  |
Maturity date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Aug. 31, 2029 |  |  |  |  |
Revolving period end date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2027-08 |  |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 273,900 |  | $ 443,900 |  |  |
Unused borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 462,100 |  | $ 192,100 |  |  |
Percentage of equity interest in funding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
Truist Credit Facility | SOFR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis points description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 225 |  |  |  |  |
Truist Credit Facility | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity date |  |  |  |  |  |  |  | Aug. 31, 2030 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility interest rate description |  |  |  |  |  |  |  | As part of the amendment, PennantPark Floating Rate Capital Ltd. decreased pricing to SOFR plus 200 basis points from SOFR plus 225 basis points |  |  |  |  |  |  |  |  |  |  |  |  |  |
Truist Credit Facility | Subsequent Event [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First lien advance rate |  |  |  |  |  |  |  | 70.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility commitments |  |  |  |  |  |  |  | $ 718,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Truist Credit Facility | Subsequent Event [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First lien advance rate |  |  |  |  |  |  |  | 72.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility commitments |  |  |  |  |  |  |  | $ 736,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Asset backed debt unamortized fees. + References No definition available. + Details
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Namespace Prefix: | pflt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Asset coverage ratio. + References No definition available. + Details
Name: | pflt_AssetCoverageRatio
Namespace Prefix: | pflt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Credit facility revolving period end date. + References No definition available. + Details
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Balance Type: | na
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- Definition First Lien advance rate + References No definition available. + Details
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Namespace Prefix: | pflt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of equity interest in funding. + References No definition available. + Details
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Namespace Prefix: | pflt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
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- Definition Percentage of notes issued by securitization issuer. + References No definition available. + Details
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Namespace Prefix: | pflt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of original principal amount payable. + References No definition available. + Details
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Namespace Prefix: | pflt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of preferred shares of securitization issuer. + References No definition available. + Details
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Namespace Prefix: | pflt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
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- Definition Percentage of public offering price per notes issued. + References No definition available. + Details
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Namespace Prefix: | pflt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Preferred shares of securitization issuer. + References No definition available. + Details
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Namespace Prefix: | pflt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Replacement Debt + References No definition available. + Details
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Namespace Prefix: | pflt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Investments in notes or bonds that are collateralized by a specific group of underlying assets owned by the issuer of the notes or bonds which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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