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Organization and Formation of Company - Additional Information (Detail) | Dec. 31, 2014 Property sqft | Dec. 31, 2012 Property
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Organization and Formation of Company [Line Items] |  |
Company's ownership interest in the general partners | 100.00%fr_OwnershipInterestInGeneralPartner |
Number of joint ventures | 2 fr_NumberOfJointVentures |
Number of industrial properties owned | 638 us-gaap_NumberOfRealEstateProperties |
Number of states in which industrial properties are located | 25 us-gaap_NumberOfStatesInWhichEntityOperates |
Gross leasable area (GLA) of industrial properties owned | 63,500,000 us-gaap_AreaOfRealEstateProperty |
2003 Net Lease Joint Venture |  |
Organization and Formation of Company [Line Items] |  |
Noncontrolling equity ownership interest | 15.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = fr_TwoThousandThreeNetLeaseJointVentureMember |
Number of industrial properties owned | 1 us-gaap_NumberOfRealEstateProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = fr_TwoThousandThreeNetLeaseJointVentureMember | 1 us-gaap_NumberOfRealEstateProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = fr_TwoThousandThreeNetLeaseJointVentureMember
Gross leasable area (GLA) of industrial properties owned | 800,000 us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = fr_TwoThousandThreeNetLeaseJointVentureMember |
2007 Europe Joint Venture |  |
Organization and Formation of Company [Line Items] |  |
Noncontrolling equity ownership interest | 10.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = fr_TwoThousandSevenEuropeJointVentureMember |

X
- Definition The number of joint ventures that the entity owns a non-controlling interest in as of the balance sheet date. + References No definition available. + Details
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- Details
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- Definition Ownership interest in general partner. + References No definition available. + Details
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- Definition Area of a real estate property. + References No definition available. + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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- Details
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