XML 99 R82.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Subsequent Events - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 2 Months Ended
--- | --- | ---
Dec. 31, 2014 Property | Dec. 31, 2013 Property | Dec. 31, 2012 Property | Feb. 24, 2015 Property
Subsequent Event [Line Items] |  |  |  |
Number of industrial properties sold | 29 fr_NumberOfIndustrialPropertiesSold | 67 fr_NumberOfIndustrialPropertiesSold | 28 fr_NumberOfIndustrialPropertiesSold |
Proceeds from sale of industrial properties | $ 102,596 us-gaap_ProceedsFromSaleOfBuildings | $ 144,628 us-gaap_ProceedsFromSaleOfBuildings | $ 85,561 us-gaap_ProceedsFromSaleOfBuildings |
Subsequent Events |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Number of industrial properties sold |  |  |  | 6 fr_NumberOfIndustrialPropertiesSold / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Proceeds from sale of industrial properties |  |  |  | $ 12,864 us-gaap_ProceedsFromSaleOfBuildings / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

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

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- Definition The cash inflow from sale of buildings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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