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Contingent Liabilities (Details Narrative) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2012	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014
Cap on environment financial responsibility	$ 1,871us-gaap_LossContingencyRangeOfPossibleLossMaximum			$ 1,871us-gaap_LossContingencyRangeOfPossibleLossMaximum
Environmental remediation expense			1,771us-gaap_EnvironmentalRemediationExpense
Equity in loss of joint ventures	150us-gaap_IncomeLossFromEquityMethodInvestments	31us-gaap_IncomeLossFromEquityMethodInvestments		180us-gaap_IncomeLossFromEquityMethodInvestments	63us-gaap_IncomeLossFromEquityMethodInvestments	128us-gaap_IncomeLossFromEquityMethodInvestments
Riverfront I Joint Venture
Environmental remediation expense	100us-gaap_EnvironmentalRemediationExpense / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember
Total cost of remediation	2,024FRPH_CostofRemediation / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember			2,024FRPH_CostofRemediation / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember
Equity in loss of joint ventures	$ 140us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember			$ 162us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember		$ 89us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember
Joint venture percentage stake	76.91%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember			76.91%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember		76.91%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember

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