XML 27 R29.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Investment in Real Estate - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 Property sqft | Sep. 30, 2013 Property | Dec. 31, 2013 Property
Real Estate Investment Property, Net [Abstract] |  |  |  |  |
Number of industrial properties acquired |  |  | 3 |  |
Gross leasable area (GLA) of industrial properties acquired |  |  | 500,000 |  |
Purchase price of acquisitions |  |  | $ 52,882 |  |
Number of industrial properties sold |  |  | 20 |  |
Gross leasable area (GLA) of industrial properties sold |  |  | 1,000,000 |  |
Proceeds from sale of industrial properties |  |  | 59,011 |  |
Gain on sale of real estate |  |  | 14,483 | 16,203 |
Number of sold industrial properties included in discontinued operations |  |  | 20 | 19 | 67
Number of industrial properties held for sale |  |  | 2 |  |
Gross leasable area (GLA) of industrial properties held for sale |  |  | 200,000 |  |
Impairment of real estate |  |  | 0 | 2,652 |
Impairment of real estate included in discontinued operations | $ 0 | $ 0 | $ 0 | $ 1,605 |

X
- Definition Amount of impairment attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References No definition available. + Details
Name: | fr_DisposalGroupIncludingDiscontinuedOperationsImpairment
Namespace Prefix: | fr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Number of Industrial Properties Held for Sale. + References No definition available. + Details
Name: | fr_NumberOfIndustrialPropertiesHeldForSale
Namespace Prefix: | fr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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 sold industrial properties included in discontinued operations. + References No definition available. + Details
Name: | fr_NumberOfSoldIndustrialPropertiesIncludedInDiscontinuedOperations
Namespace Prefix: | fr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Square Footage of Industrial Properties Held for Sale. + References No definition available. + Details
Name: | fr_SquareFootageOfIndustrialPropertiesHeldForSale
Namespace Prefix: | fr_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

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 Square Footage of Real Estate Properties Acquired. + References No definition available. + Details
Name: | fr_SquareFootageOfRealEstatePropertiesAcquired
Namespace Prefix: | fr_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

X
- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnSaleOfProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 + Details
Name: | us-gaap_ImpairmentOfRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + 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 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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
Name: | us-gaap_ProceedsFromSaleOfBuildings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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