Document and Entity Information	9 Months Ended
	Sep. 30, 2018 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, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding	10,076,524
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2018
Is Entity a smaller reporting company	true
Is Entity an emerging growth company	false