Accumulated amortization
Other intangible assets, accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Significant Accounting Policies [Text Block]
Commitment And Contingencies [Line Items]
Commitment And Contingencies [Line Items]
Commitment And Contingencies [Line Items]
Rental expenses
Rental expenses
Total rental expenses
Cost of Other Property Operating Expense
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Lease extension option period
Lessor, Operating Lease, Renewal Term
Award Timing Predetermined
Award Timing Predetermined [Flag]
2026 (nine months ending December 31, 2026)
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year
Entity File Number
Entity File Number
Additional Paid-in Capital
Additional Paid-in Capital [Member]
Interest Rate Swap
Interest Rate Swap [Member]
OTHER INCOME
Other Income and Other Expense Disclosure [Text Block]
Tabular List, Table
Tabular List [Table Text Block]
Leases [Abstract]
Leases [Abstract]
EARNINGS PER COMMON SHARE
EARNINGS PER UNIT - BASIC
Earnings Per Share, Basic [Abstract]
2030
Lessor, Operating Lease, Payment to be Received, Year Four
Intangible Asset, Acquired, Finite-Lived [Line Items]
Intangible Asset, Acquired, Finite-Lived [Line Items]
Recent Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Noncash compensation expense
Restricted Stock or Unit Expense
Senior Guaranteed Notes, Series D
Senior Guaranteed Notes, Series D [Member]
Senior Guaranteed Notes, Series D [Member]
Leasing commissions, net of accumulated amortization of $55,956 and $56,094, respectively
Deferred Costs, Leasing, Net
SOFR
Secured Overnight Financing Rate (SOFR) [Member]
Accrued leasing commissions
Increase (Decrease) Accrued Leasing Commissions
Change in accrued leasing commissions
Accounts payable and accrued liabilities for construction in progress
Construction in Progress Expenditures Incurred but Not yet Paid
Interest expense, net
Interest expense, net
Interest expense, net
Interest Income (Expense), Nonoperating
Trading Arrangements, by Individual
Trading Arrangements, by Individual [Table]
Measurement Basis [Axis]
Measurement Basis [Axis]
Earnings per common share, basic (in dollars per share)
Earnings per unit, basic (in dollars per share)
Earnings Per Share, Basic
Adjustment to Compensation:
Adjustment to Compensation [Axis]
RELATED PARTY TRANSACTIONS
Related Party Transactions Disclosure [Text Block]
Named Executive Officers, Footnote
Named Executive Officers, Footnote [Text Block]
Change in accounts payable and accrued expenses
Change in accounts payable and accrued expenses
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Adjustment to Compensation, Amount
Adjustment to Compensation Amount
Proportion of total revenue provided by retail or office tenants
Concentration Risk, Percentage
Change in other assets
Change in other assets
Increase (Decrease) in Other Operating Assets
Basis of Presentation
Consolidation, Policy [Policy Text Block]
Stock-based compensation expense
Stock-based compensation expense
Share-Based Payment Arrangement, Noncash Expense
Wbw Hotel Lessee Llc
Wbw Hotel Lessee Llc [Member]
WBW Hotel Lessee LLC.
Employee Stock Option
Share-Based Payment Arrangement, Option [Member]
Award Timing MNPI Disclosure
Award Timing MNPI Disclosure [Text Block]
Accumulated accretion
Below Market Lease, Accumulated Amortization
Cash paid for income taxes
Income Taxes Paid
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Total American Assets Trust, Inc. stockholders’ equity
Equity, Attributable to Parent
Insider Trading Policies and Procedures [Line Items]
Common stock, shares authorized (in shares)
Common Stock, Shares Authorized
Hedging Designation [Domain]
Hedging Designation [Domain]
Secured notes payable, net
Secured notes payable, net
Secured Debt
Common shares issued (in shares)
Stock Issued During Period, Shares, New Issues
Southern California
Southern California [Member]
Southern California [Member]
TOTAL LIABILITIES AND EQUITY
Liabilities and Equity
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Axis]
LIABILITIES AND EQUITY
LIABILITIES AND CAPITAL
Liabilities and Equity [Abstract]
Cover page.
Cover [Abstract]
Portion at Fair Value Measurement
Portion at Fair Value Measurement [Member]
Maximum
Maximum [Member]
Full debt repayment percentage of principal plus a make-whole amount
Debt Instrument, Prepayment, Percentage Of Principal Plus A Stated Amount
Debt Instrument, Prepayment, Percentage Of Principal Plus A Stated Amount
Capital Expenditures
Segment, Expenditure, Addition to Long-Lived Assets
Other
Other Real Estate Rental Revenue
Other real estate rental revenue.
Straight-line rent liability
Deferred Rent Credit
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Percentage rent
Lease Rental Income, Percent Rent
Lease Rental Income, Percent Rent
Acquired lease intangible assets, net
Acquired lease intangible assets, net
Finite-Lived Intangible Assets, Net
Summary of Current Annual Payment Under Operating Leases
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Concentration Risk Type [Domain]
Concentration Risk Type [Domain]
Non-PEO NEO Average Total Compensation Amount
Non-PEO NEO Average Total Compensation Amount
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Summary of Activity of Restricted Stock Awards
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
Adjustment to Non-PEO NEO Compensation Footnote
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
Pay vs Performance Disclosure [Line Items]
Lease liability
Present value of lease liability
Operating Lease, Liability
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Total
Lessor, Operating Lease, Payment to be Received
LIABILITIES:
LIABILITIES:
Liabilities [Abstract]
Non-Rule 10b5-1 Arrangement Terminated
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Depreciation and amortization
Depreciation and amortization
Depreciation and amortization
Depreciation, Depletion and Amortization, Nonproduction
Entity Shell Company
Entity Shell Company
Equity [Line Items]
Equity [Line Items]
Equity [Line Items]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Number of calendar months termination fee is based
Calendar Months
Calendar months.
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Summary of Supplement Disclosures Related to Consolidated Statements of Cash Flows
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Extension option
Lessee, Operating Lease, Remaining Lease Term
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Company Selected Measure Amount
Company Selected Measure Amount
2029
Lessee, Operating Lease, Liability, to be Paid, Year Three
Comprehensive income attributable to non-controlling interests
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest
Award Timing MNPI Considered
Award Timing MNPI Considered [Flag]
Comprehensive income attributable to American Assets Trust, Inc.
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Commitment And Contingencies
Commitment And Contingencies [Table]
Commitment And Contingencies [Table]
Security deposits payable
Security deposits payable
Security Deposit Liability
Thereafter
Lessor, Operating Lease, Payment to be Received, after Year Four
Lessor, Operating Lease, Payment to be Received, after Year Four
Name
Measure Name
Income from operations attributable to American Assets Trust, Inc. common stockholders—basic
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent
Secured notes payable, net
Secured Debt [Member]
Management fees
Management Fee Expense
Document Fiscal Period Focus
Document Fiscal Period Focus
5.08% City Center Bellevue, October 2027
5.08% City Center Bellevue, October 2027 [Member]
City center bellevue.
Partner Capital Components [Domain]
Partner Capital Components [Domain]
Proportion of hotel occupancy gross revenue paid for program fee
Percentage Of Hotel Occupancy Gross Revenue Paid For Program Fee
Percentage of hotel occupancy gross revenue paid for program fee.
Real estate taxes
Real estate taxes
Real Estate Tax Expense
Unsecured term loan, net
Term Loan A
Unsecured Debt [Member]
Award Timing Method
Award Timing Method [Text Block]
Award Type [Axis]
Award Type [Axis]
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Lease rental income
Lease Rental Income
Lease Rental Income
Total Secured Notes Payable Outstanding
Long-Term Debt
Make-whole payment
Make Whole Payment for Debt Extinguishment
Make Whole Payment for Debt Extinguishment
Forfeiture of restricted units (in shares)
Partners' Capital Account, Restricted Units Forfeiture
Partners' Capital Account, Restricted Units Forfeiture
Legal Entity [Axis]
Legal Entity [Axis]
Multifamily
Total Multifamily
Multifamily Segment [Member]
Multifamily Segment [Member]
TOTAL ASSETS
Assets
Trading Symbol
Trading Symbol
2030
Lessee, Operating Lease, Liability, to be Paid, Year Four
Vested (in USD per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Total lease (income) cost
Lease Income (Cost)
Lease Income (Cost)
Geographical [Domain]
Geographical [Domain]
Total capital
Beginning partners' capital account
Ending partners' capital account
Partners' Capital
Entity Address, City or Town
Entity Address, City or Town
OPERATING ACTIVITIES
OPERATING ACTIVITIES
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
ACQUIRED IN-PLACE LEASES AND ABOVE/BELOW MARKET LEASES
Intangible Assets Disclosure [Text Block]
Concentration Risk Type [Axis]
Concentration Risk Type [Axis]
Deferred tax asset
Deferred Tax Assets, Net of Valuation Allowance
Total Real estate, at cost
Real Estate Investment Property, at Cost
Non-PEO NEO Average Compensation Actually Paid Amount
Non-PEO NEO Average Compensation Actually Paid Amount
Restricted Stock Units (RSUs)
Restricted Stock Units (RSUs) [Member]
Distributions
Partners' Capital Account, Distributions
Compensation Actually Paid vs. Other Measure
Compensation Actually Paid vs. Other Measure [Text Block]
General Partners
General Partner's Capital
General Partner [Member]
Average annual rent
Operating Lease, Average Annual Rent
Operating Lease, Average Annual Rent
Summary of Acquired Lease Intangibles and Leasing Costs Included in Other Assets and Other Liabilities and Deferred Credits
Business Combination, Intangible Asset, Acquired, Finite-Lived [Table Text Block]
Entity Emerging Growth Company
Entity Emerging Growth Company
Marketing
Marketing Expense
DIVIDENDS DECLARED PER COMMON SHARE (in USD per share)
Amount per Share/Unit (in dollars per unit)
Common Stock, Dividends, Per Share, Declared
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Repayment of unsecured line of credit
Repayments of Lines of Credit
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member]
Property revenue
Revenue from Contract with Customer, Including Assessed Tax
Debt issuance costs on line of credit, net of accumulated amortization of $2,716 and $2,591, respectively
Debt issuance costs, net of accumulated amortization of $745 and $723, respectively
Debt discount and issuance costs, net of accumulated amortization of $9,253 and $8,720, respectively
Debt issuance costs
Debt Issuance Costs, Net
Level 2
Fair Value, Inputs, Level 2 [Member]
Term SOFR Screen Rate
Term Screen Secured Overnight Financing Rate (SOFR) [Member]
Term Screen Secured Overnight Financing Rate (SOFR)
Insider Trading Policies and Procedures Not Adopted
Insider Trading Policies and Procedures Not Adopted [Text Block]
In-place leases
Leases, Acquired-in-Place [Member]
Related Party
Related Party [Member]
Common stock, shares outstanding (in shares)
Beginning Balance (in shares)
Ending Balance (in shares)
Common Stock, Shares, Outstanding
2026 (nine months ending December 31, 2026)
Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year
Maximum secured debt ratio
Debt Instrument, Covenants, Maximum Secured Debt Ratio
Debt Instrument, Covenants, Maximum Secured Debt Ratio
Plus: Income from operations attributable to unitholders in the Operating Partnership
Minority Interest In Continuing Operations Income Loss Operating Partnerships - Diluted
Minority Interest In Continuing Operations Income Loss Operating Partnerships - Diluted
PEO
PEO [Member]
Loss on derivatives
Derivative, Loss on Derivative
Percentage annual distributions cannot exceed funds from operations
Percentage Limit On Annual Distributions In Relation To Funds From Operations
Percentage Limit On Annual Distributions In Relation To Funds From Operations
Number of employees
Entity Number of Employees
Changes in operating assets and liabilities
Changes in operating assets and liabilities
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member]
Maximum proportion of hotel's fiscal year gross revenues paid for aggregate yearly management fee
Maximum Percentage Of Hotels Fiscal Year Gross Revenues Paid For Aggregate Yearly Management Fee
Maximum percentage of hotels fiscal year gross revenues paid for aggregate yearly Management fee.
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Limited partners' capital, units issued (in shares)
Limited Partners' Capital Account, Units Issued
Accumulated Dividends in Excess of Net Income
Retained Earnings [Member]
Accounts payable and accrued expenses
Accounts payable and accrued expenses
Accounts Payable and Accrued Liabilities
Rental Income [Line Items]
Rental Income [Line Items]
Rental Income [Line Items]
Units
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Effective interest rate
Debt Instrument, Interest Rate, Effective Percentage
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Restatement Determination Date
Restatement Determination Date
Cash and cash equivalents, beginning of period
Cash and cash equivalents, end of period
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Income Statement [Abstract]
Income Statement [Abstract]
Income tax expense
Income tax expense
Income Tax Expense (Benefit)
Interest rate swap asset
Derivative Asset
Variable rate
Debt Instrument, Basis Spread on Variable Rate
Sale of Stock [Domain]
Sale of Stock [Domain]
Other assets, net
Other assets, net
Total other assets, net
Other Assets
Number of consolidated properties located in southern California
Number Of Consolidated Properties
Number of consolidated properties.
Unsecured notes payable, net
Unsecured notes payable, net
Unsecured Debt
Pension Adjustments Service Cost
Pension Adjustments Service Cost [Member]
Designated as Hedging Instrument
Designated as Hedging Instrument [Member]
Senior Guaranteed Notes, Series G
Senior Guaranteed Notes, Series G [Member]
Senior Guaranteed Notes, Series G
Above market leases
Above Market Leases [Member]
Customer Concentration Risk
Customer Concentration Risk [Member]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Hedging Relationship [Axis]
Hedging Relationship [Axis]
NET INCOME
Net income
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Office
Total Office
Office Segment [Member]
Office Segment.
2029
Lessor, Operating Lease, Payment to be Received, Year Three
Restatement does not require Recovery
Restatement Does Not Require Recovery [Text Block]
Deferred compensation liability
Liabilities, Fair Value Disclosure
Notional Amount
Notional amount
Derivative, Notional Amount
Operating cash flow information:
Cash Flow, Operating Activities, Lessee [Abstract]
Partial debt repayment, minimum percentage of principal
Debt Instrument, Partial Repayment, Minimum Percentage of Principal
Debt Instrument, Partial Repayment, Minimum Percentage of Principal
Other Income and Expenses [Abstract]
Other Income and Expenses [Abstract]
Room in mixed-use segment all-suite hotel
Number Of Rooms In Mixed Use Segment All Suite Hotel
Number of rooms in mixed use segment all suite hotel.
Compensation Actually Paid vs. Company Selected Measure
Compensation Actually Paid vs. Company Selected Measure [Text Block]
City Area Code
City Area Code
Award Timing, How MNPI Considered
Award Timing, How MNPI Considered [Text Block]
All Trading Arrangements
All Trading Arrangements [Member]
Equity Awards Adjustments, Footnote
Equity Awards Adjustments, Footnote [Text Block]
Total Shareholder Return Vs Peer Group
Total Shareholder Return Vs Peer Group [Text Block]
Operating real estate
Operating real estate
Rental Properties
Net income attributable to restricted shares
Net income attributable to restricted shares
Less: Net income attributable to restricted shares
Net Income Attributable To Restricted Share
Net income attributable to restricted share.
Nonvested, beginning balance (in shares)
Nonvested, ending balance (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Amended and Restated Credit Facility
Amended and Restated Credit Facility [Member]
Amended and Restated Credit Facility
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
INVESTING ACTIVITIES
INVESTING ACTIVITIES
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
General and administrative
General and administrative
General and administrative
General and Administrative Expense
Pay vs Performance Disclosure
Pay vs Performance Disclosure [Table]
Net cash provided by operating activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Held for development
Held for development
Land Available for Development
Forfeiture of restricted stock (in shares)
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited
Related Party Transactions [Abstract]
Related Party Transactions [Abstract]
Subsequent Event
Subsequent Event [Member]
Other liabilities
Other Liabilities
Cash Flow Hedging
Cash Flow Hedging [Member]
Equity Valuation Assumption Difference, Footnote
Equity Valuation Assumption Difference, Footnote [Text Block]
Summary of Lease Costs Under Operating Leases and Supplemental Cash Flow Information of Leases
Lease, Cost [Table Text Block]
PEO Total Compensation Amount
PEO Total Compensation Amount
Purchase Commitment, Excluding Long-term Commitment [Axis]
Purchase Commitment, Excluding Long-Term Commitment [Axis]
Long-term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
Property expense
Property Expenses
Property expenses.
OTHER LIABILITIES AND DEFERRED CREDITS
Other Liabilities Disclosure [Text Block]
Wells Fargo Bank, N.A.
Wells Fargo Bank, N.A. [Member]
Wells Fargo Bank, N.A. [Member]
Equity Components [Axis]
Equity Components [Axis]
Sublease income
Sublease Income
Non-Rule 10b5-1 Arrangement Adopted
Non-Rule 10b5-1 Arrangement Adopted [Flag]
EXPENSES:
EXPENSES:
Operating Costs and Expenses [Abstract]
Number of reportable segments
Number of Reportable Segments
DISTRIBUTIONS PER UNIT (in USD per share)
Distributions Per Limited Partnership and General Partnership Unit, Outstanding, Basic
Interest and investment income
Interest and Other Income
Retail
Total Retail
Retail Segment [Member]
Retail Segment.
Interest Rate Swap, 1/5/2027
Interest Rate Swap, 1/5/2027 [Member]
Interest Rate Swap, 1/5/2027
Other Performance Measure, Amount
Other Performance Measure, Amount
Entity Address, State or Province
Entity Address, State or Province
Fair Value Measurement
Fair Value Measurement, Policy [Policy Text Block]
2027
Lessor, Operating Lease, Payment to be Received, Year One
Related Party, Type [Domain]
Related and Nonrelated Parties [Domain]
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Interest capitalized
Interest Costs Capitalized Adjustment
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Individual:
Individual [Axis]
Additional paid-in capital
Additional Paid in Capital, Common Stock
Entities [Table]
Entities [Table]
Entity [Domain]
Entity [Domain]
Net cash (used in) provided by investing activities
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member]
Cash paid for interest, net of amounts capitalized
Interest Paid, Excluding Capitalized Interest, Operating Activity
Document Fiscal Year Focus
Document Fiscal Year Focus
Basis of Accounting
Basis of Accounting, Policy [Policy Text Block]
Right-of-use lease asset, net
Operating Lease, Right-of-Use Asset
EQUITY OF AMERICAN ASSETS TRUST, INC.
Shareholders' Equity and Share-Based Payments [Text Block]
Forgone Recovery, Explanation of Impracticability
Forgone Recovery, Explanation of Impracticability [Text Block]
Effect of dilutive securities-conversion of Operating Partnership units (in shares)
Incremental Common Shares Attributable To Conversion Of Operating Partnership Units
Incremental common shares attributable to conversion of Operating partnership units.
Percentage of ownership interests classified as noncontrolling
Subsidiary, Ownership Percentage, Noncontrolling Owner
Entity Interactive Data Current
Entity Interactive Data Current
Senior notes, net
3.375% Senior Notes
3.375% Senior Unsecured Notes [Member]
3.375% Senior Unsecured Notes
Operating lease cost
Operating Lease, Cost
Carrying Value
Reported Value Measurement [Member]
Term of apartment leases
Term of Apartment Leases
Term of apartment leases.
Real estate, at cost
Real Estate [Abstract]
Equity [Abstract]
Equity [Abstract]
SEGMENT REPORTING
Segment Reporting Disclosure [Text Block]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table]
Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table]
Bank of America, N.A.
Bank of America, N.A. [Member]
Bank of America, N.A.
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Mixed-use
Total Mixed-Use
Mixed Use Segment [Member]
Mixed Use Segment [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Ownership [Domain]
Ownership [Domain]
Minimum debt service ratio
Debt Instrument, Covenants, Minimum Debt Service Ratio
Debt Instrument, Covenants, Minimum Debt Service Ratio
Compensation Actually Paid vs. Total Shareholder Return
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
Remaining capacity available for issuance
Remaining Capacity To Issue
Remaining $ Capacity Of Shares To Issue
Leasing commissions accumulative amortization
Deferred Costs, Leasing, Accumulated Amortization
Maximum secured leverage ratio on revolving credit facility
Maximum Secured Leverage Ratio On Revolving Credit Facility
Maximum Secured Leverage Ratio On Revolving Credit Facility
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
Equity [Table]
Equity [Table]
Equity [Table]
Summary of Minimum Future Rentals from Noncancelable Operating Leases
Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block]
Term Loan A
Term Loan A [Member]
Term Loan A [Member]
Senior Guaranteed Notes, Series C
Senior Guaranteed Notes, Series C [Member]
Senior Guaranteed Notes, Series C [Member]
Provision for uncollectible rental income
Provision for uncollectible rental income
Net Investment in Lease, Credit Loss Expense (Reversal)
Capital expenditures
Capital expenditures
Payments for Capital Improvements
Depreciation and amortization
Depreciation and amortization
Depreciation, Depletion and Amortization
Customer [Domain]
Customer [Domain]
Entity Central Index Key
Entity Central Index Key
PEO Name
PEO Name
Acquired lease intangible liabilities, net
Below Market Lease, Net
Increase (Decrease) in Partners' Capital [Roll Forward]
Increase (Decrease) in Partners' Capital [Roll Forward]
Total revenue
Revenues
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member]
Number of sales agents
Number Of Sales Agents
Number Of Sales Agents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Outstanding Aggregate Erroneous Compensation Amount
Outstanding Aggregate Erroneous Compensation Amount
DENOMINATOR
Computation Of Basic And Diluted Earnings Per Share Denominator [Abstract]
Computation Of Basic And Diluted Earnings Per Share Denominator
Revolving Loan
Revolving Credit Facility [Member]
Partner Capital Components [Axis]
Partner Capital Components [Axis]
Arrangement Duration
Trading Arrangement Duration
Schedule of Segment Reporting Information, by Segment
Schedule of Segment Reporting Information, by Segment [Table]
Segments [Axis]
Segments [Axis]
Extension term
Debt Instrument, Extension Term
Debt Instrument, Extension Term
Other noncash interest expense, net
Other noncash interest expense, net
Other Non-cash Interest Expense
Other Non-cash Interest Expense
Exercise Price
Award Exercise Price
Entity Filer Category
Entity Filer Category
Limited Partners
Limited Partners' Capital
Limited Partner [Member]
Local Phone Number
Local Phone Number
Additional 402(v) Disclosure
Additional 402(v) Disclosure [Text Block]
Unrecognized compensation expense
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Limited partners' capital, 16,181,537 and 16,181,537 units issued and outstanding as of March 31, 2026 and December 31, 2025, respectively
Limited Partners' Capital Account
Acquired below market leases, net
Off-Market Lease, Unfavorable
Revolver Loan
Revolver Loan [Member]
Revolver Loan
Series B Notes
Senior Guaranteed Notes, Series B [Member]
Senior Guaranteed Notes, Series B
ASSETS
ASSETS
Assets [Abstract]
Credit Facility [Axis]
Credit Facility [Axis]
Change in security deposits payable
Change in security deposits payable
Increase (Decrease) In Security Deposits Payable
Increase (Decrease) In Security Deposits Payable
Underlying Security Market Price Change
Underlying Security Market Price Change, Percent
Debt Instrument [Axis]
Debt Instrument [Axis]
Forfeited (in USD per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
FAIR VALUE OF FINANCIAL INSTRUMENTS
Fair Value Disclosures [Text Block]
Credit Facility [Domain]
Credit Facility [Domain]
American Assets Trust, Inc. stockholders’ equity
Equity, Attributable to Parent [Abstract]
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member]
Waikiki Beach Walk - Retail
Waikiki Beach Walk Retail [Member]
Waikiki Beach walk retail.
Entity Address, Address Line One
Entity Address, Address Line One
Entity Address, Address Line Two
Entity Address, Address Line Two
Prepaid rent and deferred revenue
Deferred Revenue
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent [Member]
Stated interest rate
Stated Interest Rate
Debt Instrument, Interest Rate, Stated Percentage
Summary of Dividends Declared and Paid on Shares of Common Stock and Noncontrolling Common Units
Dividends Declared And Paid On Shares Of Common Stock And Noncontrolling Common Units Table [Table Text Block]
Dividends declared and paid on shares of common stock and noncontrolling common units.
CAPITAL:
Partners' Capital [Abstract]
Summary of Properties Owned
Schedule of Real Estate Properties [Table Text Block]
Ownership [Axis]
Ownership [Axis]
Senior Guaranteed Notes, Series A
Senior Guaranteed Notes, Series A [Member]
aat_SeniorGuaranteedNotes,SeriesA
DERIVATIVE AND HEDGING ACTIVITIES
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Termination payment
Loss on Contract Termination for Default
Fair Value as of Grant Date
Award Grant Date Fair Value
Accounts receivable, net
Accounts receivable, net
Accounts Receivable, after Allowance for Credit Loss
Entity Registrant Name
Entity Registrant Name
Reclassified within twelve months
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months
Stock Price or TSR Estimation Method
Stock Price or TSR Estimation Method [Text Block]
Summary of Principal Components of Other Income, Net
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
Deferred compensation
Deferred Compensation Liability, Current and Noncurrent
Number of extensions available
Debt Instrument, Extension Options
Debt Instrument, Extension Options
Treasury Lock
Treasury Lock [Member]
Schedule of Net Real Estate and Secured Note Payable Balances by Segments
Net Real Estate And Secured Note Payable Balances By Segment Table [Table Text Block]
Tabular disclosure of the net real estate and secured note payable balances by segment.
Derivative Instruments and Hedging Activities Disclosures [Table]
Derivative Instruments and Hedging Activities Disclosures [Table]
Property management fee
Property Management Fee, Percent Fee
Granted (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period
Interest rate swap asset
Fair Value
Interest Rate Derivative Assets, at Fair Value
Total operating expenses
Costs and Expenses
Forfeited (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Document Quarterly Report
Document Quarterly Report
Notes and loans, net
Long-Term Debt, Fair Value
Summary of Carrying Amount and Fair Value of Financial Instruments
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Changed Peer Group, Footnote
Changed Peer Group, Footnote [Text Block]
Counterparty Name [Domain]
Counterparty Name [Domain]
2028
Lessee, Operating Lease, Liability, to be Paid, Year Two
Number of operating segments
Number of Operating Segments
Adjustment To PEO Compensation, Footnote
Adjustment To PEO Compensation, Footnote [Text Block]
Acquisition of real estate
Payments to Acquire Commercial Real Estate
Summary of Notes Payable Outstanding
Schedule of Debt [Table Text Block]
Related Party, Type [Axis]
Related and Nonrelated Parties [Axis]
Granted (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Title
Trading Arrangement, Individual Title
Peer Group Total Shareholder Return Amount
Peer Group Total Shareholder Return Amount
Business and Organization
Business And Organization, Policy [Policy Text Block]
Business and organization.
General partners' capital, units outstanding (in shares)
General Partners' Capital Account, Units Outstanding
Aggregate offering price of common share
Aggregate Offering Price Of Common Share
Maximum aggregate offering price of common shares.
Restatement Determination Date:
Restatement Determination Date [Axis]
Non-PEO NEO
Non-PEO NEO [Member]
Summary of Interest Rate Swap Terms
Schedule of Interest Rate Derivatives [Table Text Block]
Leasing commissions
Leasing commissions
Increase (Decrease) in Lease Acquisition Costs
Years of contract
Years Of Contract
Years of contract.
Sale of Stock [Axis]
Sale of Stock [Axis]
American Assets Trust, L.P.
American Assets Trust, L.P. [Member]
American Assets Trust, L.P. [Member]
Name
Trading Arrangement, Individual Name
Award Type [Domain]
Award Type [Domain]
2027
Lessee, Operating Lease, Liability, to be Paid, Year One
Noncontrolling interests
Equity, Attributable to Noncontrolling Interest
Equity Awards Adjustments
Equity Awards Adjustments [Member]
Other, net
Other, net
Other Noncash Income (Expense)
Other liabilities and deferred credits
Other liabilities and deferred credits
Total other liabilities and deferred credits, net
Deferred Credits and Other Liabilities
Pension Benefits Adjustments, Footnote
Pension Benefits Adjustments, Footnote [Text Block]
Compensation Amount
Outstanding Recovery Compensation Amount
Face amount of debt
Debt Instrument, Face Amount
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Recognition of straight-line rents
Straight Line Rent
Recovery of Erroneously Awarded Compensation Disclosure [Line Items]
Fair Value
Estimate of Fair Value Measurement [Member]
Retail Tenant
Retail Tenant [Member]
Retail Tenant
MNPI Disclosure Timed for Compensation Value
MNPI Disclosure Timed for Compensation Value [Flag]
Name
Awards Close in Time to MNPI Disclosures, Individual Name
Nonvested, beginning balance (in dollars per share)
Nonvested, ending balance (in USD per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
OTHER ASSETS, NET
Other Assets Disclosure [Text Block]
Aggregate Erroneous Compensation Not Yet Determined
Aggregate Erroneous Compensation Not Yet Determined [Text Block]
REVENUE:
REVENUE:
Revenues [Abstract]
Stock-based compensation
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition
At The Market Equity Program
At The Market Equity Program [Member]
At The Market Equity Program [Member]
Operating Partnership Units
Operating Partnership Units [Member]
Operating Partnership Units [Member]
Accumulated other comprehensive income
Accumulated other comprehensive income
Accumulated Other Comprehensive Income (Loss), Net of Tax
Hawaii excise tax
Excise and Sales Taxes
Lessor, Lease, Description [Table]
Lessor, Lease, Description [Table]
Deferred tax liability
Deferred Tax Liabilities, Gross
Segments [Domain]
Segments [Domain]
Aggregate Pension Adjustments Service Cost
Aggregate Pension Adjustments Service Cost [Member]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Acquired lease intangible assets
Finite-Lived Intangible Asset, off-Market Lease, Favorable, Gross
Reclassification of amortization of forward-starting swap included in interest expense
Reclassification of amortization of forward-starting swap included in interest expense
Reclassification of amortization of forward-starting swap included in interest expense
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax
Amortization of debt issuance costs and debt discounts
Amortization of debt issuance costs and debt discounts
Amortization of Debt Issuance Costs and Discounts
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Minimum
Minimum [Member]
Repayment of unsecured notes payable
Repayments of Notes Payable
Company Selected Measure Name
Company Selected Measure Name
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Revenue Recognition and Accounts Receivable
Revenue [Policy Text Block]
Weighted average unvested shares outstanding (in shares)
Weighted Average Unvested Participating Securities Outstanding
Weighted average unvested participating securities outstanding.
Senior Guaranteed Notes, Series E
Senior Guaranteed Notes, Series E [Member]
Senior Guaranteed Notes, Series E [Member]
Unsecured senior guaranteed notes, net
Senior Notes [Member]
DEBT
Debt Disclosure [Text Block]
Aggregate Available
Trading Arrangement, Securities Aggregate Available Amount
Purchase Commitment, Excluding Long-term Commitment [Domain]
Purchase Commitment, Excluding Long-Term Commitment [Domain]
Cash paid for amounts included in the measurement of lease liabilities
Operating Lease, Payments
Minimum interest coverage ratio covenant threshold
Minimum Unsecured Interest Coverage Ratio
Minimum Unsecured Interest Coverage Ratio
COMPONENTS OF RENTAL INCOME AND EXPENSE
Components Of Rental Income And Expense [Text Block]
The entire disclosure of the principle components of rental income and/or rental expense recognized for the period.
Stock Appreciation Rights (SARs)
Stock Appreciation Rights (SARs) [Member]
Net income attributable to common stockholders—diluted
Net Income (Loss) Available to Common Stockholders, Diluted
All Executive Categories
All Executive Categories [Member]
American Assets, Inc.
American Assets, Inc. [Member]
American Assets, Inc. [Member]
Other property income
Other property income
Other Operating Income
Common stock, $0.01 par value, 490,000,000 shares authorized, 61,390,936 and 61,390,936 shares issued and outstanding at March 31, 2026 and December 31, 2025, respectively
Common Stock, Value, Issued
Proportion of hotel occupancy gross revenue paid for franchise royalty fee
Percentage Of Hotel Occupancy Gross Revenue Paid For Franchise Royalty Fee
Percentage of hotel occupancy gross revenue paid for franchise royalty fee.
COMMITMENTS AND CONTINGENCIES
Commitments and Contingencies Disclosure [Text Block]
Weighted average shares of common stock outstanding - diluted (in shares)
Weighted average units outstanding - diluted (in shares)
Weighted average common shares outstanding - diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Segment Information
Segment Reporting, Policy [Policy Text Block]
Commitments and contingencies (Note 11)
Commitments and contingencies (Note 11)
Commitments and Contingencies
Conversion of operating partnership units (in shares)
Stock Issued During Period, Shares, Conversion of Units
Non-GAAP Measure Description
Non-GAAP Measure Description [Text Block]
Change in other liabilities and deferred credits
Change in other liabilities and deferred credits
Increase (Decrease) in Other Deferred Liability
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Entity Small Business
Entity Small Business
Limited partners' capital, units outstanding (in shares)
Limited Partners' Capital Account, Units Outstanding
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
Noncontrolling Interests - Unitholders in the Operating Partnership
Noncontrolling Interest [Member]
Document Transition Report
Document Transition Report
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]
Total interest costs incurred
Interest Costs Incurred
Summary of Principal Components of Rental Income
Components Of Rental Income Table [Table Text Block]
Components of rental income.
Underlying Securities
Award Underlying Securities Amount
Equity Component [Domain]
Equity Component [Domain]
Document Period End Date
Document Period End Date
PEO Actually Paid Compensation Amount
PEO Actually Paid Compensation Amount
INCOME TAXES
Income Tax Disclosure [Text Block]
Earnings per common share, diluted
EARNINGS PER UNIT - DILUTED
Earnings Per Share, Diluted [Abstract]
Provision for doubtful accounts
Accounts Receivable, Allowance for Credit Loss
Other intangible assets, net of accumulated amortization of $2,426 and $2,361, respectively
Other Finite-Lived Intangible Assets, Gross
Awards Close in Time to MNPI Disclosures, Table
Awards Close in Time to MNPI Disclosures [Table Text Block]
Hedging Designation [Axis]
Hedging Designation [Axis]
Total equity
Beginning Balance
Ending Balance
Equity, Including Portion Attributable to Noncontrolling Interest
Document Type
Document Type
Level 3
Fair Value, Inputs, Level 3 [Member]
Name
Outstanding Recovery, Individual Name
Federal Funds Rate
Federal Funds Rate [Member]
Interest based on Federal Funds Rate.
Derivative Contract [Domain]
Derivative Contract [Domain]
Secured Notes Payable
Notes Payable
Term of lease
Lessor, Operating Lease, Term of Contract
Hotel revenue
Revenue from Contract with Customer, Excluding Assessed Tax
All Individuals
All Individuals [Member]
Long-term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
Operating leases rental period terms
Operating Lease Rental Period
Operating Lease Rental Period
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Abstract]
Name
Forgone Recovery, Individual Name
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member]
Minimum maintenance of total unencumbered assets
Debt Instrument, Covenants, Minimum Maintenance Of Total Unencumbered Assets
Debt Instrument, Covenants, Minimum Maintenance Of Total Unencumbered Assets
Other Liabilities Disclosure [Abstract]
Other Liabilities Disclosure [Abstract]
Maximum leverage ratio of revolving credit facility
Line Of Credit Facility Maximum Leverage Percentage
Maximum leverage percentage of revolving credit facility.
Fixed interest rate on derivative
Derivative, Fixed Interest Rate
Investment in WBW CHP LLC, in percentage
Percentage Of Investment In Related Party
Percentage of investment in related party.
Fair Value Inputs Disclosures
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Aggregate Erroneous Compensation Amount
Aggregate Erroneous Compensation Amount
Rental operating
Direct Costs Of Leased Property, Lessor, Expense
Direct Costs Of Leased Property, Lessor, Expense
Summary of Components of Other Assets
Schedule of Other Assets [Table Text Block]
Peer Group Issuers, Footnote
Peer Group Issuers, Footnote [Text Block]
NET INCOME ATTRIBUTABLE TO AMERICAN ASSETS TRUST, INC. STOCKHOLDERS
Net Income (Loss) Available to Common Stockholders, Basic
Below market leases
Below Market Lease, Gross
Gain on sale of real estate
Gain on sale of real estate
Gain (Loss) on Sale of Properties
Entity Information [Line Items]
Entity Information [Line Items]
Erroneous Compensation Analysis
Erroneous Compensation Analysis [Text Block]
Schedule of Finite-Lived Intangible Assets [Table]
Intangible Asset, Finite-Lived [Table]
Schedule of Segment Activity
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]
Geographical [Axis]
Geographical [Axis]
Rule 10b5-1 Arrangement Terminated
Rule 10b5-1 Arrangement Terminated [Flag]
Outstanding
Long-Term Line of Credit
Level 1
Fair Value, Inputs, Level 1 [Member]
LEASES
Lessor, Operating Leases [Text Block]
Partner Type of Partners' Capital Account, Name [Domain]
Partner Type of Partners' Capital Account, Name [Domain]
Second Amended and Restated Credit Facility
Second Amended and Restated Credit Facility [Member]
Second Amended and Restated Credit Facility [Member]
Schedule of Related Party Transactions, by Related Party
Related Party Transaction [Table]
Earnings per common share, diluted (in dollars per share)
Earnings per unit, diluted (in dollars per share)
Earnings Per Share, Diluted
Erroneously Awarded Compensation Recovery
Erroneously Awarded Compensation Recovery [Table]
Minimum fixed charge coverage ratio covenant threshold
Minimum Fixed Charge Coverage Ratio On Revolving Credit Facility
Minimum Fixed Charge Coverage Ratio On Revolving Credit Facility
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Title of 12(b) Security
Title of 12(b) Security
Dividends declared and paid
Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings
Net income attributable to unitholders in the Operating Partnership
Less: Income from operations attributable to unitholders in the Operating Partnership
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable
Maximum unsecured leverage ratio (in percentage)
Maximum Unsecured Leverage Ratio
Maximum Unsecured Leverage Ratio
Total segments’ profit
Gross Profit
Prepaid expenses and other
Prepaid Expense
General partners' capital, units issued (in shares)
General Partners' Capital Account, Units Issued
Rental Income [Table]
Rental Income [Table]
Rental Income [Table]
NUMERATOR
Computation Of Basic And Diluted Earnings Per Share Numerator [Abstract]
Computation Of Basic And Diluted Earnings Per Share Numerator
Imputed interest
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Schedule of Reconciliation of Segment Profit to Net Income Attributable to Stockholders
Reconciliation Of Segment Profit To Net Income Attributable To Stockholders Table [Table Text Block]
Reconciliation of segment profit to net income attributable to stockholders.
Award Timing Disclosures [Line Items]
Principal Balance
Long-Term Debt, Gross
Total lease payments
Lessee, Operating Lease, Liability, to be Paid
Partner Type [Axis]
Partner Type [Axis]
Subsequent Event [Table]
Subsequent Event [Table]
Expiration Date
Trading Arrangement Expiration Date
Maximum aggregate debt ratio
Debt Instrument, Covenants, Maximum Aggregate Debt Ratio
Debt Instrument, Covenants, Maximum Aggregate Debt Ratio
Net real estate
Net real estate
Real Estate Investment Property, Net
EQUITY:
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Accumulated amortization
Lease Incentive Accumulated Amortization
Lease Incentive Accumulated Amortization
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Geographic Concentration Risk
Geographic Concentration Risk [Member]
Adoption Date
Trading Arrangement Adoption Date
Base Rate
Base Rate [Member]
Compensation Actually Paid vs. Net Income
Compensation Actually Paid vs. Net Income [Text Block]
Change in accounts receivable
Change in accounts receivable
Increase (Decrease) in Accounts Receivable
Lease incentives, net of accumulated amortization of $1,297 and $1,239, respectively
Incentive to Lessee
Entity Current Reporting Status
Entity Current Reporting Status
Termination notice period
Termination Notice Period
Termination Notice Period
Recognition of amortization of above and below market leases
Amortization of above and below Market Leases
Customer [Axis]
Customer [Axis]
Awards Close in Time to MNPI Disclosures
Awards Close in Time to MNPI Disclosures [Table]
OPERATING INCOME
Operating Income (Loss)
Capital Unit [Line Items]
Capital Unit [Line Items]
Credit Facility
Line of Credit [Member]
Summary of Principal Components of Rental Expenses
Components Of Rental Expense Table [Table Text Block]
Components of rental expense.
Accumulated dividends in excess of net income
Retained Earnings (Accumulated Deficit)
Maximum recourse indebtedness of total asset value
Maximum Recourse Indebtedness Of Total Asset Value
Maximum Recourse Indebtedness Of Total Asset Value
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract]
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member]
Executive Category:
Executive Category [Axis]
COMPREHENSIVE INCOME
COMPREHENSIVE INCOME
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Current Fiscal Year End Date
Current Fiscal Year End Date
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Hotel operating
Other Cost of Operating Revenue
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member]
Weighted Average Grant Date Fair Value
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Other income, net
Other income, net
Total other income
Other income, net
Other Nonoperating Income (Expense)
Statement [Table]
Statement [Table]
FINANCING ACTIVITIES
FINANCING ACTIVITIES
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Equity Awards Adjustments, Excluding Value Reported in Compensation Table
Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]
Revenues
Revenue Benchmark [Member]
Beginning partners' capital account (in shares)
Ending partners' capital account (in shares)
Partners' Capital Account, Units
Lessor, Lease, Description [Line Items]
Lessor, Lease, Description [Line Items]
6.150% Senior Notes
6.150% Senior Unsecured Notes [Member]
6.150% Senior Unsecured Notes
Variable Rate [Domain]
Variable Rate [Domain]
Summary of Financial Liabilities Measured at Fair Value on Recurring Basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Summary of Other Liabilities and Deferred Credits
Other Liabilities And Deferred Credits Table [Table Text Block]
Tabular disclosure of other liabilities and deferred credits not separately disclosed on the balance sheet.
Proceeds from debt, net of issuance costs
Proceeds from Debt, Net of Issuance Costs
Payment for management fee
Property Management Fee, Monthly Fee
Property Management Fee, Monthly Fee
Antidilutive securities excluded from computation of EPS (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Repayment of unsecured term loan
Repayment of unsecured term loan
Repayments of Unsecured Debt
All Adjustments to Compensation
All Adjustments to Compensation [Member]
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping [Table]
Amendment Flag
Amendment Flag
Proceeds from sale of real estate, net of selling costs
Proceeds from Sale, Real Estate, Held-for-Investment
Debt issuance costs, net, revolving credit facility
Debt Issuance Costs, Line of Credit Arrangements, Net
LEASES
Lessee, Operating Leases [Text Block]
Termination Date
Trading Arrangement Termination Date
Net cash used in financing activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation
Insider Trading Policies and Procedures Adopted
Insider Trading Policies and Procedures Adopted [Flag]
Measure:
Measure [Axis]
Number of interest rate agreements
Number of Interest Rate Derivatives Held
WBW CHP LLC
WBW CHP LLC [Member]
WBW CHP LLC
Gain on derivatives
Derivative, Gain on Derivative
Weighted-average discount rate - operating leases
Operating Lease, Weighted Average Discount Rate, Percent
Weighted average shares of common stock outstanding - basic (in shares)
Weighted average units outstanding - basic (in shares)
Weighted average common shares outstanding—basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Deferred rent receivables, net
Deferred rent receivables, net
Deferred Rent Receivables, Net
Summary of Computation of Basic and Diluted EPS
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Repairs and maintenance
Cost of Property Repairs and Maintenance
Subsequent Events [Abstract]
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Pay vs Performance Disclosure, Table
Pay vs Performance [Table Text Block]
Rent
Operating Lease, Expense
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
Forgone Recovery due to Violation of Home Country Law, Amount
Forgone Recovery due to Violation of Home Country Law, Amount
Entity Tax Identification Number
Entity Tax Identification Number
Deferred rent revenue and amortization of lease intangibles
Deferred rent revenue and amortization of lease intangibles
Deferred Rent Revenue And Amortization Of Lease Intangibles
The increase (decrease) during the reporting period in the amount due that is the result of the cumulative difference between actual rent due and rental income recognized on a straight-line basis. Also includes the amortization of lease intangibles.
Office, retail, multifamily, and mixed-use operating properties
Number of Real Estate Properties
Forgone Recovery due to Expense of Enforcement, Amount
Forgone Recovery due to Expense of Enforcement, Amount
Outrigger Hotels
Outrigger Hotels And Resorts [Member]
Outrigger hotels and resorts.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Noncontrolling common units (in shares)
Shares Held By Minority Interest In Operating Partnerships
Shares held by minority interest in Operating partnerships.
Common stock, shares issued (in shares)
Common Stock, Shares, Issued
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]
Weighted-average remaining lease term - operating leases (in years)
Operating Lease, Weighted Average Remaining Lease Term
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Dividends paid to common stock and unitholders
Distributions
Payments of Dividends
Construction in progress
Construction in progress
Construction in Progress, Gross
Trading Arrangement:
Trading Arrangement [Axis]
Total Shareholder Return Amount
Total Shareholder Return Amount
Rental income
Rental income
Total rental income
Operating Lease, Lease Income
Fair value assumptions, interest rate
Debt Instrument, Measurement Input
SUBSEQUENT EVENT
Subsequent Events [Text Block]
Insider Trading Arrangements [Line Items]
Security Exchange Name
Security Exchange Name
Common unit conversion ratio
Partners Capital Redemption & Conversion Ratio
Partners Capital Redemption & Conversion Ratio
Thereafter
Lessee, Operating Lease, Liability, to be Paid, after Year Four
Lessee, Operating Lease, Liability, to be Paid, after Year Four
Accumulated amortization
Accumulated Amortization, Debt Issuance Costs
2028
Lessor, Operating Lease, Payment to be Received, Year Two
Total liabilities
Liabilities
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Note offering percent
Debt Instrument, Face Issuance Percent
Debt Instrument, Face Issuance Percent
PARTNERS' CAPITAL OF AMERICAN ASSETS TRUST, L.P.
Partners' Capital Notes Disclosure [Text Block]
Revolving credit facility borrowing limit
Line of Credit Facility, Maximum Borrowing Capacity
Properties held for development
Real Estate Properties Held For Development
The number of real estate properties held for development.
Pension Adjustments Prior Service Cost
Pension Adjustments Prior Service Cost [Member]
Stock-based compensation
Partners' Capital Account, Unit-Based Payment Arrangement, Amount
Material Terms of Trading Arrangement
Material Terms of Trading Arrangement [Text Block]
Lease extension options exercise period
Lease, Extension Option, Exercise Period
Lease, Extension Option, Exercise Period
Weighted average interest rate
Line of Credit Facility, Interest Rate During Period
Statement [Line Items]
Statement [Line Items]
Schedule of Capital Units [Table]
Equity, Capital Unit or Share [Table]
Variable Rate [Axis]
Variable Rate [Axis]
Rule 10b5-1 Arrangement Adopted
Rule 10b5-1 Arrangement Adopted [Flag]
Cash and cash equivalents
Cash and cash equivalents
Cash and Cash Equivalent
Fair Value Measurement Inputs and Valuation Techniques [Table]
Fair Value Measurement Inputs and Valuation Techniques [Table]
General partner's capital, 61,390,936 and 61,390,936 units issued and outstanding as of March 31, 2026 and December 31, 2025, respectively
General Partners' Capital Account
Counterparty Name [Axis]
Counterparty Name [Axis]
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Common Shares
Common Stock [Member]
Vested (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Non-NEOs
Non-NEOs [Member]
Accumulated depreciation
Accumulated depreciation
Real Estate Investment Property, Accumulated Depreciation
Net decrease in cash and cash equivalents
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation