XML 105 R84.htm IDEA: XBRL DOCUMENT
v3.25.4

Leases - The Company as a Lessor - Narrative (Details) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2025 USD ($) | Sep. 30, 2025 USD ($) unit Property | Mar. 31, 2025 USD ($) a | Dec. 31, 1870 a
Lessor, Lease, Description [Line Items] |  |  |  |
Area of real estate property | a |  |  |  | 571
Present value of future lease payments and initial unguaranteed residual value |  |  | $ 9.2 |
Selling profit recognized | $ 4.1 |  |  |
Kakaako Commerce Center ("KCC") Lease |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |
Residual value of leased land |  | $ 10.3 |  |
Present value of future lease payments and initial unguaranteed residual value |  | $ 14.1 |  |
Selling profit recognized | $ 2.6 |  |  |
Number of leased units | unit |  | 2 |  |
Number of industrial property | Property |  | 1 |  |
Real estate intangible asset residual value |  | $ 1.2 |  |
Land |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |
Area of real estate property | a |  |  | 4.7 |
Residual value of leased land |  |  | $ 5.0 |

X
- Definition Sales-type Lease, Net Investment in Lease, After Allowance For Credit Loss, Unguaranteed Residual Value + References No definition available. + Details
Name: | alex_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossUnguaranteedResidualValue
Namespace Prefix: | alex_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Sales-Type Lease, Number Of Industrial Property + References No definition available. + Details
Name: | alex_SalesTypeLeaseNumberOfIndustrialProperty
Namespace Prefix: | alex_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Sales-Type Lease, Number Of Leased Units + References No definition available. + Details
Name: | alex_SalesTypeLeaseNumberOfLeasedUnits
Namespace Prefix: | alex_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Sales-type Lease, Real Estate Intangible Asset Residual Value + References No definition available. + Details
Name: | alex_SalesTypeLeaseRealEstateIntangibleAssetResidualValue
Namespace Prefix: | alex_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-3 + Details
Name: | us-gaap_LessorLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of residual asset covered by residual value guarantee under sales-type lease. Excludes guarantee considered to be lease payments for lessor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-3 + Details
Name: | us-gaap_SalesTypeLeaseResidualValueOfLeasedAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of profit (loss) recognized at commencement from sales-type lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-6A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-5 + Details
Name: | us-gaap_SalesTypeLeaseSellingProfitLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_LeaseContractualTermAxis=alex_KakaakoCommerceCenterKCCLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |