XML 98 R75.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Subsequent Events - Additional Information (Details) $ in Thousands | 2 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 17, 2022 USD ($) Property | Dec. 31, 2021 USD ($) Property | Dec. 31, 2020 USD ($) Property | Dec. 31, 2019 USD ($) Property
Subsequent Event [Line Items] |  |  |  |
Number of industrial properties |  | 410 |  |
Acquisition Activity |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Number of industrial properties |  | 4 | 8 | 9
Total Purchase Price of Industrial Properties and Land Parcels Acquired | $ |  | $ 340,950 | $ 224,027 | $ 147,887
Subsequent Events | Acquisition Activity |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Number of industrial properties | 2 |  |  |
Number of Land Parcels | 1 |  |  |
Total Purchase Price of Industrial Properties and Land Parcels Acquired | $ | $ 21,836 |  |  |

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

X
- Definition The amount of assets acquired. + References No definition available. + Details
Name: | fr_PurchasePrice
Namespace Prefix: | fr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | fr_InvestmentinRealEstateActivityAxis=fr_AcquisitionActivityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |