Finite-Lived Intangible Assets, Acquired Through Acquisitions

No definition available.

Name:	are_FiniteLivedIntangibleAssetsAcquiredThroughAcquisitions
Namespace Prefix:	are_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Weighted average remaining amortization period, acquired in-place and below-market leases

+ References

No definition available.

+ Details

Name:	are_Weightedaverageremainingamortizationperiodacquiredinplaceandbelowmarketleases
Namespace Prefix:	are_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

- 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 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479907/805-20-50-5

+ Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

- Definition

The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-13

+ Details

Name:	us-gaap_PaymentsToAcquireRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

Name:	us-gaap_RealEstateInvestmentPropertyNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=are_A285299307And345DorchesterAvenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=are_A428WestlakeAvenueNorthMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=are_OthermarketsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_LeasesAcquiredInPlaceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_AboveMarketLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	are_PropertyTypeAxis=are_FutureDevelopmentProjectsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	are_PropertyTypeAxis=are_OperatingwithfuturedevelopmentandredevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	are_PropertyTypeAxis=are_OperatingPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=srt_NorthAmericaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Investments in real estate - Acquisitions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) ft² property	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Business Acquisition [Line Items]
Purchase Price	$ 248,699	$ 265,750	$ 2,877,861
Investments in real estate	$ 32,110,039	31,633,511
285, 299, 307, and 345 Dorchester Avenue
Business Acquisition [Line Items]
Number of real estate properties \| property	0
Purchase Price	$ 155,321
428 Westlake Avenue North
Business Acquisition [Line Items]
Number of real estate properties \| property	1
Purchase Price	$ 47,600
Other markets
Business Acquisition [Line Items]
Purchase Price	46,490
Acquired-in-Place Leases
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Acquired Through Acquisitions	4,400
Above Market Leases
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Acquired Through Acquisitions	$ 492
Future development \| 285, 299, 307, and 345 Dorchester Avenue
Business Acquisition [Line Items]
Area of Real Estate Property \| ft²	1,040,000
Operating with future development and redevelopment \| 428 Westlake Avenue North
Business Acquisition [Line Items]
Area of Real Estate Property \| ft²	90,626
Operating property
Business Acquisition [Line Items]
Weighted average remaining amortization period, acquired in-place and below-market leases	2 years 9 months 18 days
Operating property \| Acquired-in-Place Leases
Business Acquisition [Line Items]
Weighted average remaining amortization period, acquired in-place and below-market leases	2 years 6 months
Operating property \| Above Market Leases
Business Acquisition [Line Items]
Weighted average remaining amortization period, acquired in-place and below-market leases	5 years 1 month 6 days
North America
Business Acquisition [Line Items]
Number of real estate properties \| property	391
Area of Real Estate Property \| ft²	39,800,000
Purchase Price	$ 249,411
Investments in real estate	$ 32,110,039	$ 31,633,511
North America \| Future development
Business Acquisition [Line Items]
Area of Real Estate Property \| ft²	1,040,000
North America \| Operating with future development and redevelopment
Business Acquisition [Line Items]
Area of Real Estate Property \| ft²	90,626