XML 49 R29.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Accounting Policies [Abstract] |
Useful Lives of Depreciable Assets | Depreciation expense is computed using the straight-line method based on the following useful lives:
| Years
Buildings and Improvements | 3 to 50
Land Improvements | 2 to 25
Furniture, Fixtures and Equipment | 3 to 5
Tenant Improvements | Shorter of Useful Life or Terms of Related Lease
Summary of Deferred Leasing Intangibles | Deferred leasing intangibles, net of accumulated amortization, included in our total assets and total liabilities consist of the following:
| December 31, 2023 |  | December 31, 2022
In-Place Leases | $ | 16,199 |  |  | $ | 19,373 |
Above Market Leases | 2,435 |  |  | 1,319 |
Below Market Ground Lease Obligation | 1,417 |  |  | 1,462 |
Tenant Relationships | 1,467 |  |  | 1,936 |
Total Included in Total Assets, Net of $28,205 and $28,590 of Accumulated Amortization | $ | 21,518 |  |  | $ | 24,090 |
Below Market Leases | $ | 11,851 |  |  | $ | 15,152 |
Total Included in Total Liabilities, Net of $16,796 and $18,004 of Accumulated Amortization | $ | 11,851 |  |  | $ | 15,152 |
Future Amortization Expense Related to Deferred Leasing Intangibles | We will recognize net amortization expense related to deferred leasing intangibles over the next five years for properties owned as of December 31, 2023 as follows:
| Estimated Amortization of In-Place Leases and Tenant Relationships |  | Estimated Net Increase to Rental Revenues Related to Above and Below Market Leases
2024 | $ | 4,860 |  |  | $ | 3,341 |
2025 | $ | 3,790 |  |  | $ | 2,465 |
2026 | $ | 2,666 |  |  | $ | 1,558 |
2027 | $ | 1,787 |  |  | $ | 973 |
2028 | $ | 1,394 |  |  | $ | 741 |

X
- Definition Tabular disclosure which describes the periods of time which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). + References No definition available. + Details
Name: | fr_PropertyPlantAndEquipmentUsefulLivesTableTableTextBlock
Namespace Prefix: | fr_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
Name: | us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
Name: | us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration