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Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 Property sqft Buildings | Dec. 31, 2012 | Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract] |  |  |
Number of leased properties granting the tenants options to purchase the property | 3 |  |
Letter of credit and performance bonds in the aggregate amount | $ 8,054 |  |
Number of industrial properties committed to development | 3 |  |
Gross leasable area (GLA) of industrial properties committed to development | 800,000 |  |
Estimated total construction costs | 49,200 |  |
Estimated total construction costs remaining to be funded | 23,900 |  |
Operating and ground lease expense | $ 1,440 | $ 1,565 | $ 1,955

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- Definition Estimated Total Construction Costs of Development Projects. + References No definition available. + Details
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- Definition Estimated construction cost to be funded. + References No definition available. + Details
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Namespace Prefix: | fr_
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Balance Type: | debit
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- Definition Number Of Buildings Under Construction + References No definition available. + Details
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Balance Type: | na
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- Definition The number of operating leases which contain options to purchase the property. + References No definition available. + Details
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Namespace Prefix: | fr_
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Balance Type: | na
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- Definition Square Feet Under Development + References No definition available. + Details
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Namespace Prefix: | fr_
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- Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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