XML 18 R1.htm IDEA: XBRL DOCUMENT v3.25.3
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2025
Nov. 24, 2025
Mar. 31, 2025
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --09-30    
Document Period End Date Sep. 30, 2025    
Document Transition Report false    
Entity File Number 814-00891    
Entity Registrant Name PENNANTPARK FLOATING RATE CAPITAL LTD.    
Entity Incorporation, State or Country Code MD    
Entity Tax Identification Number 27-3794690    
Entity Address, Address Line One 1691 Michigan Avenue    
Entity Address, City or Town Miami Beach    
Entity Address, State or Province FL    
Entity Address, Postal Zip Code 33139    
City Area Code 786    
Local Phone Number 297-9500    
Title of 12(b) Security Common Stock, par value $0.001 per share    
Trading Symbol PFLT    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 1,069.5
Entity Common Stock, Shares Outstanding   99,217,896  
Entity Central Index Key 0001504619    
Amendment Flag false    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Document Financial Statement Error Correction [Flag] false    
Auditor Name RSM US LLP    
Auditor Location New York    
Auditor Firm ID 49    
Documents Incorporated by Reference Documents Incorporated by Reference: Portions of the Registrant’s Proxy Statement relating to the Registrant’s 2026 Annual Meeting of Stockholders to be filed not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K are incorporated by reference into Part III of this Report.