Document and Entity Information	9 Months Ended
	Sep. 30, 2017 shares
Document And Entity Information
Entity Registrant Name	FRP HOLDINGS, INC.
Entity Central Index Key	0000844059
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding	10,007,167
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2017