Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Oct. 29, 2020
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, 2020
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Incorporation State Country	FL
Entity File Number	001-36769
Is Entity's Reporting Status Current?	Yes
Is the interactive data current?	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		9,418,385
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020
Is Entity a smaller reporting company	true
Is Entity an emerging growth company	false
Is Entity a shell company	false
Security title	Common stock, $.10 par value
Trading symbol	FRPH
Name of exchange on which registered	NASDAQ