Cover - USD ($)	12 Months Ended
	Dec. 31, 2022	Mar. 17, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2022
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--12-31
Entity File Number	001-36769
Entity Registrant Name	FRP HOLDINGS, INC.
Entity Central Index Key	0000844059
Entity Tax Identification Number	47-2449198
Entity Incorporation, State or Country Code	FL
Entity Address, Address Line One	200 W. Forsyth St.
Entity Address, Address Line Two	7th Floor
Entity Address, City or Town	Jacksonville
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	32202
City Area Code	(904)
Local Phone Number	396-5733
Title of 12(b) Security	Common Stock, $.10 par value
Trading Symbol	FRPH
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 448,654,924
Entity Common Stock, Shares Outstanding		9,484,970
Auditor Name	Hancock Askew & Co., LLP
Auditor Location	Jacksonville, Florida
Auditor Firm ID	794