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Description of Business and Basis of Presentation (Details Narrative) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2018 USD ($) | Sep. 30, 2018 integer | May 21, 2018 USD ($) integer
Warehouse properties |  | 3 |
Discontinued Operations, Disposed of by Sale [Member] |  |  |
Warehouse properties |  |  | 40
Land parcels |  |  | 3
Sales price | $ | $ 347,200 |  |
Excluded [Member] |  |  |
Warehouse properties |  |  | 1
Property value | $ |  |  | $ 11,700

X
- References No definition available. + Details
Name: | FRPH_RealEstatePropertyValue
Namespace Prefix: | FRPH_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of units in a real estate property owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Cash received for the sale of real estate that is not part of an investing activity during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |