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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 | $ 1,871 us-gaap_LossContingencyRangeOfPossibleLossMaximum |  |  | $ 1,871 us-gaap_LossContingencyRangeOfPossibleLossMaximum |  |
Environmental remediation expense |  |  | 1,771 us-gaap_EnvironmentalRemediationExpense |  |  |
Equity in loss of joint ventures | 150 us-gaap_IncomeLossFromEquityMethodInvestments | 31 us-gaap_IncomeLossFromEquityMethodInvestments |  | 180 us-gaap_IncomeLossFromEquityMethodInvestments | 63 us-gaap_IncomeLossFromEquityMethodInvestments | 128 us-gaap_IncomeLossFromEquityMethodInvestments
Riverfront I Joint Venture |  |  |  |  |  |
Environmental remediation expense | 100 us-gaap_EnvironmentalRemediationExpense / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember |  |  |  |  |
Total cost of remediation | 2,024 FRPH_CostofRemediation / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember |  |  | 2,024 FRPH_CostofRemediation / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember |  |
Equity in loss of joint ventures | $ 140 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember |  |  | $ 162 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_EquityInterestIssuedOrIssuableByTypeAxis = FRPH_RiverfrontIJointVentureMember |  | $ 89 us-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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- Definition The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859 + Details
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