XML 54 R37.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Organization - Additional Information (Detail) ft² in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 ft² Property Joint_Ventures State | Dec. 31, 2014 ft² Property | Dec. 31, 2013 ft² Property
Organization [Line Items] |  |  |
Company's ownership interest in the Operating Partnership | 96.30% | 96.20% |
Operating Partnership's minimum ownership interest in the limited partnerships | 99.00% |  |
Company's ownership interest in the general partners | 100.00% |  |
Limited partners' ownership interest in the Operating Partnership | 3.70% | 3.80% |
Number of joint ventures | Joint_Ventures | 2 |  |
Number of industrial properties sold | 66 | 29 | 67
Gross leasable area (GLA) of industrial properties sold | ft² | 3.8 | 2.0 | 3.0
Number of industrial properties owned | 589 |  |
Number of states in which industrial properties are located | State | 25 |  |
Gross leasable area (GLA) of industrial properties sold | ft² | 63.6 |  |
Other Real Estate Partnership |  |  |
Organization [Line Items] |  |  |
NumberOfLimitedPartnership | 8 |  |
Operating Partnership's minimum ownership interest in the limited partnerships | 99.00% |  |
General Partners' minimum ownership interest in the limited partnerships | 0.01% |  |
2003 Net Lease Joint Venture |  |  |
Organization [Line Items] |  |  |
Noncontrolling equity ownership interest | 15.00% |  |
Number of industrial properties sold | 1 |  |
Gross leasable area (GLA) of industrial properties sold | ft² | 0.8 |  |
2007 Europe Joint Venture |  |  |
Organization [Line Items] |  |  |
Noncontrolling equity ownership interest | 10.00% |  |
Number of industrial properties owned | 0 |  |

X
- Definition Number of industrial properties sold. + References No definition available. + Details
Name: | fr_NumberOfIndustrialPropertiesSold
Namespace Prefix: | fr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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
Name: | fr_NumberOfJointVentures
Namespace Prefix: | fr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of limited partnerships. + References No definition available. + Details
Name: | fr_NumberOfLimitedPartnership
Namespace Prefix: | fr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Organization And Formation Of Company [Line Items] + References No definition available. + Details
Name: | fr_OrganizationAndFormationOfCompanyLineItems
Namespace Prefix: | fr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Ownership interest in general partner. + References No definition available. + Details
Name: | fr_OwnershipInterestInGeneralPartner
Namespace Prefix: | fr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Square footage of industrial properties sold. + References No definition available. + Details
Name: | fr_SquareFootageOfIndustrialPropertiesSold
Namespace Prefix: | fr_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- 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
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
Name: | us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of units or percentage investment held by one or more members or limited partners of the LLC or LP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
Name: | us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
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

X
- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=fr_OtherRealEstatePartnershipMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=fr_TwoThousandThreeNetLeaseJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=fr_TwoThousandSevenEuropeJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |