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Document and Entity Information (USD $)
 12 Months Ended
Sep. 30, 2014
Nov. 28, 2014
Mar. 31, 2014
Document And Entity Information      
Entity Registrant Name FRP HOLDINGS, INC.    
Entity Central Index Key 0000844059    
Document Type 10-K    
Document Period End Date Sep. 30, 2014    
Amendment Flag false    
Current Fiscal Year End Date --09-30    
Is Entity a Well-known Seasoned Issuer? No    
Is Entity a Voluntary Filer? No    
Is Entity's Reporting Status Current? Yes    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 165,387,088
Entity Common Stock, Shares Outstanding   9,713,395  
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2014