$AAT
American Assets Trust, Inc. Stock $aat

$aat Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000150021724000008 Filed on February 14, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$110.7M	$112.5M	$441.2M
YoY Change	2.73%	6.12%	4.38%
Cost Of Revenue	$41.09M	$43.71M	$164.0M
YoY Change	4.98%	9.82%	7.56%
Gross Profit	$69.61M	$68.78M	$277.2M
YoY Change	1.45%	3.9%	2.59%
Gross Profit Margin	62.88%	61.14%	62.84%
Selling, General & Admin	$9.871M	$9.472M	$35.96M
YoY Change	3.83%	5.09%	4.17%
% of Gross Profit	14.18%	13.77%	12.97%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$30.22M	$29.91M	$119.5M
YoY Change	1.06%	-0.67%	-3.11%
% of Gross Profit	43.41%	43.48%	43.11%
Operating Expenses	$9.871M	$39.38M	$155.5M
YoY Change	3.83%	0.66%	350.32%
Operating Profit	$30.55M	$29.40M	$121.7M
YoY Change	2.8%	8.59%	6.11%
Interest Expense	-$16.26M	-$16.28M	-$64.71M
YoY Change	-203.34%	12.64%	11.12%
% of Operating Profit	-53.21%	-55.39%	-53.15%
Other Income/Expense, Net	$10.33M	$377.0K	$7.649M
YoY Change	54.65%	-279.52%	-1323.84%
Pretax Income	$24.62M	$13.49M	$64.69M
YoY Change	19.15%	8.75%	15.77%
Income Tax	$260.0K		$1.041M
% Of Pretax Income	1.06%		1.61%
Net Earnings	$24.62M	$10.48M	$50.38M
YoY Change	19.15%	8.85%	-9.84%
Net Earnings / Revenue	22.24%	9.32%	11.42%
Basic Earnings Per Share	$0.32	$0.17	$0.84
Diluted Earnings Per Share	$0.32	$0.14	$0.66
COMMON SHARES
Basic Shares Outstanding	60.90M shares	60.72M shares	60.16M shares
Diluted Shares Outstanding	76.49M shares		76.34M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$98.55M	$82.89M	$82.89M
YoY Change	12.85%	67.21%	67.21%
Cash & Equivalents	$98.55M	$82.89M	$82.89M
Short-Term Investments
Other Short-Term Assets	$10.30M	$10.46M	$10.46M
YoY Change	11.53%	12.72%	12.72%
Inventory
Prepaid Expenses
Receivables	$7.606M	$7.624M	$7.624M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$116.5M	$90.51M	$90.51M
YoY Change	10.86%	35.71%	35.71%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.712B	$2.705B	$2.705B
YoY Change	-1.51%	-1.93%	-1.93%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$1.133M	$1.295M	$1.295M
YoY Change	-36.42%
Total Long-Term Assets	$2.872B	$2.894B	$2.894B
YoY Change	-1.49%	-0.92%	-0.92%
TOTAL ASSETS
Total Short-Term Assets	$116.5M	$90.51M	$90.51M
Total Long-Term Assets	$2.872B	$2.894B	$2.894B
Total Assets	$2.988B	$2.985B	$2.985B
YoY Change	-1.06%	-0.11%	-0.11%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$65.29M	$61.31M	$61.31M
YoY Change	-0.99%	-7.09%	-7.09%
Accrued Expenses	$22.62M	$23.25M	$23.25M
YoY Change	-9.85%	-9.43%	-9.43%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$96.77M	$70.19M	$70.19M
YoY Change	-3.11%	-30.06%	-30.06%
LONG-TERM LIABILITIES
Long-Term Debt	$1.690B	$1.690B	$1.690B
YoY Change	0.16%	2.52%	2.52%
Other Long-Term Liabilities	$44.95M	$71.19M	$71.19M
YoY Change	-13.81%	34.19%	34.19%
Total Long-Term Liabilities	$1.735B	$1.761B	$1.761B
YoY Change	-0.26%	3.51%	3.51%
TOTAL LIABILITIES
Total Short-Term Liabilities	$96.77M	$70.19M	$70.19M
Total Long-Term Liabilities	$1.735B	$1.761B	$1.761B
Total Liabilities	$1.833B	$1.787B	$1.787B
YoY Change	-0.42%	-0.86%	1.14%
SHAREHOLDERS EQUITY
Retained Earnings	-$281.2M	-$280.2M
YoY Change	10.32%	11.57%
Common Stock	$1.471B	$1.470B
YoY Change	0.52%	0.55%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.200B	$1.198B	$1.198B
YoY Change
Total Liabilities & Shareholders Equity	$2.988B	$2.985B	$2.985B
YoY Change	-1.06%	-0.11%	-0.11%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$24.62M	$10.48M	$50.38M
YoY Change	19.15%	8.85%	-9.84%
Depreciation, Depletion And Amortization	$30.22M	$29.91M	$119.5M
YoY Change	1.06%	-0.67%	-3.11%
Cash From Operating Activities	$54.78M	$38.85M	$188.8M
YoY Change	5.41%	1.76%	5.41%
INVESTING ACTIVITIES
Capital Expenditures	$10.94M	$18.78M	$82.98M
YoY Change	-55.38%	-26.25%	-47.79%
Acquisitions
YoY Change
Other Investing Activities	-$2.353M	-$907.0K	-$6.907M
YoY Change	99.92%	-25.72%	-6.33%
Cash From Investing Activities	-$13.29M	-$19.69M	-$89.89M
YoY Change	-48.27%	-26.23%	-45.96%
FINANCING ACTIVITIES
Cash Dividend Paid	$25.82M		$101.6M
YoY Change	1.75%		3.38%
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$25.82M	-26.25M	-$65.55M
YoY Change	-324.82%	3.53%	-36.18%
NET CHANGE
Cash From Operating Activities	$54.78M	38.85M	$188.8M
Cash From Investing Activities	-$13.29M	-19.69M	-$89.89M
Cash From Financing Activities	-$25.82M	-26.25M	-$65.55M
Net Change In Cash	$15.67M	-7.083M	$33.32M
YoY Change	-58.51%	-48.9%	-137.04%
FREE CASH FLOW
Cash From Operating Activities	$54.78M	$38.85M	$188.8M
Capital Expenditures	$10.94M	$18.78M	$82.98M
Free Cash Flow	$43.84M	$20.07M	$105.8M
YoY Change	59.71%	57.87%	425.57%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	us-gaap	Profit Loss ProfitLoss	36593000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	116306000	usd
CY2023	us-gaap	Net Investment In Lease Credit Loss Expense Reversal NetInvestmentInLeaseCreditLossExpenseReversal	1439000	usd
CY2022	us-gaap	Net Investment In Lease Credit Loss Expense Reversal NetInvestmentInLeaseCreditLossExpenseReversal	2334000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	55877000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	36593000	usd
CY2021	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	564000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	43506000	usd
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0001500217
CY2023Q4	us-gaap	Derivative Asset Statement Of Financial Position Extensible Enumeration DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherAssets
CY2022Q4	us-gaap	Derivative Asset Statement Of Financial Position Extensible Enumeration DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherAssets
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssets
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssets
CY2023Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#DeferredCreditsAndOtherLiabilities
CY2022Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#DeferredCreditsAndOtherLiabilities
CY2023	dei	Document Type DocumentType	10-K
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity Registrant Name EntityRegistrantName	AMERICAN ASSETS TRUST, INC.
CY2023	dei	Entity File Number EntityFileNumber	001-35030
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	27-3338708
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	3420 Carmel Mountain Road
CY2023	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 100
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	San Diego
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	92121
CY2023	dei	City Area Code CityAreaCode	858
CY2023	dei	Local Phone Number LocalPhoneNumber	350-2600
CY2023	dei	Security12b Title Security12bTitle	Common Stock, $.01 par value per share
CY2023	dei	Trading Symbol TradingSymbol	AAT
CY2023	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	1012000000.000	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	60895786	shares
CY2023Q4	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2023Q4	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2023	dei	Auditor Firm AuditorFirmId	42
CY2023	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2023	dei	Auditor Location AuditorLocation	San Diego, California
CY2023Q4	us-gaap	Rental Properties RentalProperties	3502251000	usd
CY2022Q4	us-gaap	Rental Properties RentalProperties	3468537000	usd
CY2023Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	239030000	usd
CY2022Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	202385000	usd
CY2023Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	487000	usd
CY2022Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	547000	usd
CY2023Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	3741768000	usd
CY2022Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	3671469000	usd
CY2023Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1036453000	usd
CY2022Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	936913000	usd
CY2023Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	2705315000	usd
CY2022Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	2734556000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	82888000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	49571000	usd
CY2023Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	7624000	usd
CY2022Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	7848000	usd
CY2023Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	89210000	usd
CY2022Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	87192000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	99644000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	108714000	usd
CY2023Q4	us-gaap	Assets Assets	2984681000	usd
CY2022Q4	us-gaap	Assets Assets	2987881000	usd
CY2023Q4	us-gaap	Secured Debt SecuredDebt	74669000	usd
CY2022Q4	us-gaap	Secured Debt SecuredDebt	74578000	usd
CY2023Q4	us-gaap	Unsecured Debt UnsecuredDebt	1614958000	usd
CY2022Q4	us-gaap	Unsecured Debt UnsecuredDebt	1539453000	usd
CY2023Q4	us-gaap	Line Of Credit LineOfCredit	0	usd
CY2022Q4	us-gaap	Line Of Credit LineOfCredit	34057000	usd
CY2023Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	61312000	usd
CY2022Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	65992000	usd
CY2023Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	8880000	usd
CY2022Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	8699000	usd
CY2023Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	71187000	usd
CY2022Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	79577000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	1831006000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	1802356000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	490000000	shares
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	490000000	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	60895786	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	60895786	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	60718653	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	60718653	shares
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	609000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	607000	usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1469206000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1461201000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-280239000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-251167000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	8282000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	10624000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1197858000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1221265000	usd
CY2023Q4	us-gaap	Minority Interest MinorityInterest	-44183000	usd
CY2022Q4	us-gaap	Minority Interest MinorityInterest	-35740000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1153675000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1185525000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2984681000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2987881000	usd
CY2023	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	419373000	usd
CY2022	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	402507000	usd
CY2021	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	360208000	usd
CY2023	us-gaap	Other Operating Income OtherOperatingIncome	21791000	usd
CY2022	us-gaap	Other Operating Income OtherOperatingIncome	20141000	usd
CY2021	us-gaap	Other Operating Income OtherOperatingIncome	15620000	usd
CY2023	us-gaap	Revenues Revenues	441164000	usd
CY2022	us-gaap	Revenues Revenues	422648000	usd
CY2021	us-gaap	Revenues Revenues	375828000	usd
CY2023	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	118801000	usd
CY2022	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	107645000	usd
CY2021	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	86980000	usd
CY2023	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	45156000	usd
CY2022	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	44788000	usd
CY2021	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	42794000	usd
CY2023	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	35960000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	32143000	usd
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	29879000	usd
CY2023	us-gaap	Depreciation And Amortization DepreciationAndAmortization	119500000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	123338000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	116306000	usd
CY2023	us-gaap	Costs And Expenses CostsAndExpenses	319417000	usd
CY2022	us-gaap	Costs And Expenses CostsAndExpenses	307914000	usd
CY2021	us-gaap	Costs And Expenses CostsAndExpenses	275959000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	121747000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	114734000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	99869000	usd
CY2023	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-64706000	usd
CY2022	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-58232000	usd
CY2021	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-58587000	usd
CY2023	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4271000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7649000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-625000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-418000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	64690000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	55877000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	36593000	usd
CY2023	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	761000	usd
CY2022	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	648000	usd
CY2021	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	564000	usd
CY2023	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	13551000	usd
CY2022	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	11723000	usd
CY2021	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	7653000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	50378000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	43506000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	28376000	usd
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.72
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60158976	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60048970	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	59990740	shares
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.72
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.47
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76340513	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76230507	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76172277	shares
CY2021	us-gaap	Profit Loss ProfitLoss	36593000	usd
CY2021	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	usd
CY2021	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	88936000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8493000	usd
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	865000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	2723000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1210123000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	55877000	usd
CY2022	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	usd
CY2022	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	98248000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8690000	usd
CY2022	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	759000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	11319000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1185525000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	64690000	usd
CY2023	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	usd
CY2023	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	101571000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8838000	usd
CY2023	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	831000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-1827000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1153675000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	55877000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	36593000	usd
CY2023	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-7239000	usd
CY2022	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-11489000	usd
CY2021	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-17634000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	119500000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	123338000	usd
CY2023	aat	Amortization Of Debt Issuance Costs And Debt Fair Value Adjustments AmortizationOfDebtIssuanceCostsAndDebtFairValueAdjustments	3388000	usd
CY2022	aat	Amortization Of Debt Issuance Costs And Debt Fair Value Adjustments AmortizationOfDebtIssuanceCostsAndDebtFairValueAdjustments	2581000	usd
CY2021	aat	Amortization Of Debt Issuance Costs And Debt Fair Value Adjustments AmortizationOfDebtIssuanceCostsAndDebtFairValueAdjustments	2753000	usd
CY2021	us-gaap	Net Investment In Lease Credit Loss Expense Reversal NetInvestmentInLeaseCreditLossExpenseReversal	-2289000	usd
CY2023	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4271000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	8838000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	8690000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	8493000	usd
CY2023	aat	Other Non Cash Interest Expense OtherNonCashInterestExpense	1149000	usd
CY2022	aat	Other Non Cash Interest Expense OtherNonCashInterestExpense	1477000	usd
CY2021	aat	Other Non Cash Interest Expense OtherNonCashInterestExpense	1098000	usd
CY2023	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-266000	usd
CY2022	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	252000	usd
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1314000	usd
CY2023	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	870000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	404000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-2273000	usd
CY2023	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1141000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	723000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-109000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	765000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-1237000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	15331000	usd
CY2023	aat	Increase Decrease In Security Deposits Payable IncreaseDecreaseInSecurityDepositsPayable	181000	usd
CY2022	aat	Increase Decrease In Security Deposits Payable IncreaseDecreaseInSecurityDepositsPayable	655000	usd
CY2021	aat	Increase Decrease In Security Deposits Payable IncreaseDecreaseInSecurityDepositsPayable	443000	usd
CY2023	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	83000	usd
CY2022	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	1179000	usd
CY2021	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	1464000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	188751000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	179072000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	168329000	usd
CY2023	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	0	usd
CY2022	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	45166000	usd
CY2021	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	204511000	usd
CY2023	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	82980000	usd
CY2022	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	113781000	usd
CY2021	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	104588000	usd
CY2023	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	6907000	usd
CY2022	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	7374000	usd
CY2021	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	3142000	usd
CY2023	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	usd
CY2022	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	usd
CY2021	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	47760000	usd
CY2023	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	0	usd
CY2022	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	0	usd
CY2021	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	47723000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-89887000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-166321000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-312278000	usd
CY2023	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	75000000	usd
CY2021	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	usd
CY2023	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	0	usd
CY2022	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	111000000	usd
CY2021	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	0	usd
CY2023	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	225000000	usd
CY2022	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	usd
CY2023	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	0	usd
CY2022	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	36000000	usd
CY2021	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	0	usd
CY2023	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	36000000	usd
CY2022	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	usd
CY2021	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	100000000	usd
CY2023	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	150000000	usd
CY2022	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	usd
CY2021	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	155375000	usd
CY2023	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	0	usd
CY2022	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	0	usd
CY2021	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	494675000	usd
CY2023	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2145000	usd
CY2022	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3697000	usd
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	5075000	usd
CY2023	us-gaap	Payments Of Dividends PaymentsOfDividends	101571000	usd
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	98248000	usd
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	88936000	usd
CY2023	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	831000	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	759000	usd
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	865000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-65547000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-102704000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	144424000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	33317000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-89953000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	475000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	49571000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	139524000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	139049000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	82888000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	49571000	usd
CY2023Q4	dei	Entity Number Of Employees EntityNumberOfEmployees	228	employee
CY2023Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	31	property
CY2023Q4	aat	Real Estate Properties Held For Development RealEstatePropertiesHeldForDevelopment	3	property
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:13.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div>The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America, referred to as “GAAP,” requires management to make estimates and assumptions that in certain circumstances affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities, and revenues and expenses. These estimates are prepared using management's best judgment, after considering past, current and expected events and economic conditions. Actual results could differ from these estimates.
CY2023	us-gaap	Interest Costs Incurred InterestCostsIncurred	72479000	usd
CY2022	us-gaap	Interest Costs Incurred InterestCostsIncurred	63997000	usd
CY2021	us-gaap	Interest Costs Incurred InterestCostsIncurred	61578000	usd
CY2023	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	7773000	usd
CY2022	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	5765000	usd
CY2021	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2991000	usd
CY2023	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-64706000	usd
CY2022	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-58232000	usd
CY2021	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-58587000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	62003000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	56060000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	50970000	usd
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	1427000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	865000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	356000	usd
CY2023	aat	Increase Decrease Accrued Construction In Progress IncreaseDecreaseAccruedConstructionInProgress	16103000	usd
CY2022	aat	Increase Decrease Accrued Construction In Progress IncreaseDecreaseAccruedConstructionInProgress	20832000	usd
CY2021	aat	Increase Decrease Accrued Construction In Progress IncreaseDecreaseAccruedConstructionInProgress	18697000	usd
CY2023	aat	Increase Decrease Accrued Leasing Commissions IncreaseDecreaseAccruedLeasingCommissions	1726000	usd
CY2022	aat	Increase Decrease Accrued Leasing Commissions IncreaseDecreaseAccruedLeasingCommissions	2442000	usd
CY2021	aat	Increase Decrease Accrued Leasing Commissions IncreaseDecreaseAccruedLeasingCommissions	2628000	usd
CY2023	us-gaap	Revenue Recognition Leases RevenueRecognitionLeases	<div style="margin-top:14pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Revenue Recognition and Accounts Receivable</span></div><div style="margin-top:4.5pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our leases with tenants are classified as operating leases. Substantially all such leases contain fixed rent escalations which occur at specified times during the term of the lease. Base rents are recognized on a straight-line basis from when the tenant controls the space through the term of the related lease, based on management's assessment of credit, collection and other business risks. When we determine that we are the owner of tenant improvements and the tenant has reimbursed us for a portion or all of the tenant improvement costs, we consider the amount paid to be additional rent, which is recognized on a straight-line basis over the term of the related lease. For first generation tenants, in instances in which we fund tenant improvements and the improvements are deemed to be owned by us, revenue recognition will commence when the improvements are substantially completed and possession or control of the space is turned over to the tenant. When we determine that the tenant is the owner of tenant improvements, tenant allowances are recorded as lease incentives and we commence revenue recognition and lease incentive amortization when possession or control of the space is turned over to the tenant for tenant work to begin. Percentage rents, which represent additional rents based upon the level of sales achieved by </span></div><div style="margin-top:4.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">certain tenants, are recognized at the end of the lease year or earlier if we have determined the required sales level is achieved and the percentage rents are collectible. Real estate tax and other cost reimbursements are recognized on an accrual basis over the periods in which the related expenditures are incurred.</span></div><div style="margin-top:4.5pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Other property income includes parking income, general excise tax billed to tenants and fees charged to tenants at our multifamily properties. Other property income is recognized when we satisfy performance obligations as evidenced by the transfer of control of our services to customers. We measure other property income based on the amount of consideration we expect to be entitled to in exchange for the services provided. We recognize general excise tax gross, with the amounts billed to tenants and customers recorded in other property income and the related taxes paid as rental expense. The general excise tax included in other property income was $3.7 million, $3.4 million and $2.5 million for the years ended December 31, 2023, 2022 and 2021, respectively. For a tenant to terminate its lease agreement prior to the end of the agreed term, we may require that they pay a fee to cancel the lease agreement. Lease termination fees for which the tenant has relinquished control of the space are generally recognized on the later of the termination date or the satisfaction of all conditions precedent to the lease termination, including, without limitation, payment of all lease termination fees. When a lease is terminated early but the tenant continues to control the space under a modified lease agreement, the lease termination fee is generally recognized evenly over the remaining term of the modified lease agreement. </span></div><div><span><br/></span></div><div style="text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Current accounts receivable from tenants primarily relate to contractual minimum rent and percentage rent as well as real estate tax and other cost reimbursements. Accounts receivable from straight-line rent is typically longer term in nature and relates to the cumulative amount by which straight-line rental income recorded to date exceeds cash rents billed to date under the contractual lease agreement.</span></div><div style="margin-top:9pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We recognize revenue on the hotel portion of our mixed-use property from the rental of hotel rooms and guest services when we satisfy performance obligations as evidenced by the transfer of control when the rooms are occupied and services have been provided. Food and beverage sales are recognized when the customer has been served or at the time the transaction occurs. Revenue from room rental is included in rental revenue on the statement of comprehensive income. Revenue from other sales and services provided is included in other property income on the statement of comprehensive income. </span></div><div style="margin-top:9pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We make estimates of the collectability of our current accounts receivable and straight-line rents receivable which requires significant judgment by management. The collectability of receivables is affected by numerous different factors including current economic trends, including the impact of the COVID-19 on tenant's businesses and changes in tenants' payment patterns, tenant bankruptcies, the status of collectability of current cash rents receivable, tenants' recent and historical financial and operating results, changes in our tenants' credit ratings, communications between our operating personnel and tenants, the extent of security deposits and letters of credits held with respect to tenants, and the ability of the tenant to perform under the terms of their lease agreement when evaluating the adequacy of the allowance for doubtful accounts. If our assessment of these factors indicates that it is no longer probable that we will be able to collect substantially all rents, we recognize a charge to rental income and limit our rental income to the lesser of lease income on a straight-line basis plus variable rents when they become accruable or cash collected. If we change our conclusion regarding the probability of collecting rent payments required by a lessee, we may recognize an adjustment to rental income in the period we make a change to our prior conclusion.</span></div><div style="margin-top:9pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">At December 31, 2023 and December 31, 2022, our allowance for doubtful accounts was $1.4 million and $2.1 million, respectively. Total collectability related adjustments for rental income, which includes the allowance for doubtful accounts and deferred rent receivables, was $1.5 million, $2.3 million and $2.3 million for the years ended December 31, 2023, 2022 and 2021, respectively.</span></div>
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1400000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	2100000	usd
CY2023	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1500000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2300000	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2300000	usd
CY2023	us-gaap	Depreciation Depreciation	106300000	usd
CY2022	us-gaap	Depreciation Depreciation	108100000	usd
CY2021	us-gaap	Depreciation Depreciation	102000000	usd
CY2023Q4	us-gaap	Below Market Lease Net BelowMarketLeaseNet	16537000	usd
CY2023Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	64100000	usd
CY2022Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	39900000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0	usd
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	700000	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	1400000	usd
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	2600000	usd
CY2023	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	segment
CY2023Q4	aat	Number Of Rooms In Mixed Use Segment All Suite Hotel NumberOfRoomsInMixedUseSegmentAllSuiteHotel	369	room
CY2023Q4	us-gaap	Land Land	701266000	usd
CY2023Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	2388906000	usd
CY2023Q4	us-gaap	Land Improvements LandImprovements	79521000	usd
CY2023Q4	us-gaap	Tenant Improvements TenantImprovements	325737000	usd
CY2023Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	45836000	usd
CY2023Q4	aat	Construction In Progress Including Land Gross ConstructionInProgressIncludingLandGross	200502000	usd
CY2023Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	3741768000	usd
CY2023Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1036453000	usd
CY2023Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	2705315000	usd
CY2022Q4	us-gaap	Land Land	701326000	usd
CY2022Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	2373706000	usd
CY2022Q4	us-gaap	Land Improvements LandImprovements	75534000	usd
CY2022Q4	us-gaap	Tenant Improvements TenantImprovements	315741000	usd
CY2022Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	41306000	usd
CY2022Q4	aat	Construction In Progress Including Land Gross ConstructionInProgressIncludingLandGross	163856000	usd
CY2022Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	3671469000	usd
CY2022Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	936913000	usd
CY2022Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	2734556000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	18664000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	23633000	usd
CY2023Q4	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	50624000	usd
CY2022Q4	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	52832000	usd
CY2023Q4	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	34087000	usd
CY2022Q4	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	33168000	usd
CY2023	us-gaap	Restricted Stock Expense RestrictedStockExpense	8800000	usd
CY2022Q4	us-gaap	Below Market Lease Net BelowMarketLeaseNet	19664000	usd
CY2023	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	3100000	usd
CY2022	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	3300000	usd
CY2021	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	3200000	usd
CY2023	aat	Acquired Finite Lived Intangible Liabilities Below Market Leases Weighted Average Period Before Renewal Or Extension AcquiredFiniteLivedIntangibleLiabilitiesBelowMarketLeasesWeightedAveragePeriodBeforeRenewalOrExtension	P10Y10M24D
CY2023	aat	Finite Lived Intangible Liabilities Below Market Leases Renewal Options FiniteLivedIntangibleLiabilitiesBelowMarketLeasesRenewalOptions	9500000	usd
CY2023	aat	Finite Lived Intangible Liabilities Below Market Leases Weighted Average Period Before Next Renewal Or Extension FiniteLivedIntangibleLiabilitiesBelowMarketLeasesWeightedAveragePeriodBeforeNextRenewalOrExtension	P7Y1M6D
CY2023	us-gaap	Amortization Of Below Market Lease AmortizationOfBelowMarketLease	3127000	usd
CY2022	us-gaap	Amortization Of Below Market Lease AmortizationOfBelowMarketLease	3348000	usd
CY2021	us-gaap	Amortization Of Below Market Lease AmortizationOfBelowMarketLease	3271000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1842000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3881000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3427000	usd
CY2023Q4	us-gaap	Below Market Lease Amortization Income Next Twelve Months BelowMarketLeaseAmortizationIncomeNextTwelveMonths	2731000	usd
CY2023Q4	us-gaap	Below Market Lease Amortization Income Year Two BelowMarketLeaseAmortizationIncomeYearTwo	2194000	usd
CY2023Q4	us-gaap	Below Market Lease Amortization Income Year Three BelowMarketLeaseAmortizationIncomeYearThree	1776000	usd
CY2023Q4	us-gaap	Below Market Lease Amortization Income Year Four BelowMarketLeaseAmortizationIncomeYearFour	1460000	usd
CY2023Q4	us-gaap	Below Market Lease Amortization Income Year Five BelowMarketLeaseAmortizationIncomeYearFive	1121000	usd
CY2023Q4	us-gaap	Below Market Lease Amortization Income After Year Five BelowMarketLeaseAmortizationIncomeAfterYearFive	7255000	usd
CY2023Q4	us-gaap	Below Market Lease Net BelowMarketLeaseNet	16537000	usd
CY2023Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	2627000	usd
CY2022Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	2411000	usd
CY2023Q4	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	7963000	usd
CY2022Q4	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	9986000	usd
CY2023Q4	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	0	usd
CY2022Q4	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	196000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	47978000	usd
CY2022Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	43078000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	36721000	usd
CY2022Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	38436000	usd
CY2023Q4	us-gaap	Derivative Assets DerivativeAssets	7963000	usd
CY2022Q4	us-gaap	Derivative Assets DerivativeAssets	9986000	usd
CY2023Q4	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	1205000	usd
CY2022Q4	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	1012000	usd
CY2023Q4	us-gaap	Incentive To Lessee IncentiveToLessee	1232000	usd
CY2022Q4	us-gaap	Incentive To Lessee IncentiveToLessee	1296000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1813000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1549000	usd
CY2023Q4	us-gaap	Other Finite Lived Intangible Assets Gross OtherFiniteLivedIntangibleAssetsGross	1809000	usd
CY2022Q4	us-gaap	Other Finite Lived Intangible Assets Gross OtherFiniteLivedIntangibleAssetsGross	2165000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	21503000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	23921000	usd
CY2023Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	10457000	usd
CY2022Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	9277000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	99644000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	108714000	usd
CY2023Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	16537000	usd
CY2022Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	19664000	usd
CY2023Q4	us-gaap	Deferred Revenue DeferredRevenue	17261000	usd
CY2022Q4	us-gaap	Deferred Revenue DeferredRevenue	17971000	usd
CY2023Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	0	usd
CY2022Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	196000	usd
CY2023Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	10666000	usd
CY2022Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	12746000	usd
CY2023Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	2627000	usd
CY2022Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	2411000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	784000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	852000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	23254000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	25676000	usd
CY2023Q4	us-gaap	Other Liabilities OtherLiabilities	58000	usd
CY2022Q4	us-gaap	Other Liabilities OtherLiabilities	61000	usd
CY2023Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	71187000	usd
CY2022Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	79577000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	100000000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	425000000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	0	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	425000000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	0	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	750000000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	1700000000	usd
CY2023	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	400000	usd
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2023Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2021Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.28
CY2021Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.28
CY2021Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.30
CY2021Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.30
CY2022Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.32
CY2022Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.32
CY2022Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.32
CY2022Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.32
CY2023Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.33
CY2023Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.33
CY2023Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.33
CY2023Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.33
CY2023	aat	Ordinary Income Dividends Per Share OrdinaryIncomeDividendsPerShare	1.20
CY2023	aat	Ordinary Income Dividends Percentage OrdinaryIncomeDividendsPercentage	0.906
CY2022	aat	Ordinary Income Dividends Per Share OrdinaryIncomeDividendsPerShare	1.18
CY2022	aat	Ordinary Income Dividends Percentage OrdinaryIncomeDividendsPercentage	0.921
CY2021	aat	Ordinary Income Dividends Per Share OrdinaryIncomeDividendsPerShare	0.73
CY2021	aat	Ordinary Income Dividends Percentage OrdinaryIncomeDividendsPercentage	0.626
CY2023	aat	Capital Gain Dividends Per Share CapitalGainDividendsPerShare	0
CY2023	aat	Capital Gain Dividends Percentage CapitalGainDividendsPercentage	0
CY2022	aat	Capital Gain Dividends Per Share CapitalGainDividendsPerShare	0
CY2022	aat	Capital Gain Dividends Percentage CapitalGainDividendsPercentage	0
CY2021	aat	Capital Gain Dividends Per Share CapitalGainDividendsPerShare	0
CY2021	aat	Capital Gain Dividends Percentage CapitalGainDividendsPercentage	0
CY2023	aat	Return Of Capital Dividends Per Share ReturnOfCapitalDividendsPerShare	0.12
CY2023	aat	Return Of Capital Dividends Percentage ReturnOfCapitalDividendsPercentage	0.094
CY2022	aat	Return Of Capital Dividends Per Share ReturnOfCapitalDividendsPerShare	0.10
CY2022	aat	Return Of Capital Dividends Percentage ReturnOfCapitalDividendsPercentage	0.079
CY2021	aat	Return Of Capital Dividends Per Share ReturnOfCapitalDividendsPerShare	0.43
CY2021	aat	Return Of Capital Dividends Percentage ReturnOfCapitalDividendsPercentage	0.374
CY2023	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.32
CY2023	aat	Common Stock Dividend Rate Percentage CommonStockDividendRatePercentage	1.000
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.28
CY2022	aat	Common Stock Dividend Rate Percentage CommonStockDividendRatePercentage	1.000
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.16
CY2021	aat	Common Stock Dividend Rate Percentage CommonStockDividendRatePercentage	1.000
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	4054411	shares
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	1965554	shares
CY2023	aat	Measurement Input Volatility Look Back Period MeasurementInputVolatilityLookBackPeriod	P3Y
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	483000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-21000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	8000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	118000	usd
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-215000	usd
CY2022	us-gaap	Restricted Stock Expense RestrictedStockExpense	8700000	usd
CY2021	us-gaap	Restricted Stock Expense RestrictedStockExpense	8500000	usd
CY2023Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	8200000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	64690000	usd
CY2023	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	761000	usd
CY2022	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	648000	usd
CY2023	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	13551000	usd
CY2022	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	11723000	usd
CY2021	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	7653000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	50378000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	43506000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	28376000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	50378000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	28376000	usd
CY2023	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	13551000	usd
CY2022	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	11723000	usd
CY2021	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	7653000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	63929000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	55229000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	36029000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60158976	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60048970	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	59990740	shares
CY2023	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
CY2022	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
CY2021	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76340513	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76230507	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76172277	shares
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.72
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.72
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.47
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	900000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	700000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	800000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	900000	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	86000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1191000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1063000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-221000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	137000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1041000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	850000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	738000	usd
CY2023	us-gaap	Loss On Contract Termination For Default LossOnContractTerminationForDefault	7700000	usd
CY2023	aat	Operating Leases Rental Period Terms OperatingLeasesRentalPeriodTerms	P12M
CY2023	aat	Number Of State With Office Retail And Mixed Use Properties NumberOfStateWithOfficeRetailAndMixedUseProperties	5	state
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	250331000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	237495000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	220200000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	192128000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	149153000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	228664000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	1277971000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	3428000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3531000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3584000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3584000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	3584000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	8959000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	26670000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	3416000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	23254000	usd
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	3713000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	3377000	usd
CY2023	us-gaap	Sublease Income SubleaseIncome	3664000	usd
CY2022	us-gaap	Sublease Income SubleaseIncome	3416000	usd
CY2023	aat	Lease Income Cost LeaseIncomeCost	-49000	usd
CY2022	aat	Lease Income Cost LeaseIncomeCost	39000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y6M
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0319
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	3328000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	3232000	usd
CY2023	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	3625000	usd
CY2022	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	4004000	usd
CY2021	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	4337000	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	42881000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	38115000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	24935000	usd
CY2023	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	2656000	usd
CY2022	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	2615000	usd
CY2021	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	2351000	usd
CY2023	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	419373000	usd
CY2022	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	402507000	usd
CY2021	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	360208000	usd
CY2023	us-gaap	Straight Line Rent StraightLineRent	3900000	usd
CY2022	us-gaap	Straight Line Rent StraightLineRent	5900000	usd
CY2021	us-gaap	Straight Line Rent StraightLineRent	14000000	usd
CY2023	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	3100000	usd
CY2022	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	3300000	usd
CY2021	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	3200000	usd
CY2023	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	53028000	usd
CY2022	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	47832000	usd
CY2021	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	41488000	usd
CY2023	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	29380000	usd
CY2022	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	25833000	usd
CY2021	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	17518000	usd
CY2023	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	22639000	usd
CY2022	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	22222000	usd
CY2021	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	18113000	usd
CY2023	us-gaap	Marketing Expense MarketingExpense	3485000	usd
CY2022	us-gaap	Marketing Expense MarketingExpense	2379000	usd
CY2021	us-gaap	Marketing Expense MarketingExpense	1779000	usd
CY2023	us-gaap	Operating Lease Expense OperatingLeaseExpense	3536000	usd
CY2022	us-gaap	Operating Lease Expense OperatingLeaseExpense	3215000	usd
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	4023000	usd
CY2023	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	4387000	usd
CY2022	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	4081000	usd
CY2021	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	2792000	usd
CY2023	us-gaap	Management Fee Expense ManagementFeeExpense	2346000	usd
CY2022	us-gaap	Management Fee Expense ManagementFeeExpense	2083000	usd
CY2021	us-gaap	Management Fee Expense ManagementFeeExpense	1267000	usd
CY2023	aat	Rental Expense Operating Expense RentalExpenseOperatingExpense	118801000	usd
CY2022	aat	Rental Expense Operating Expense RentalExpenseOperatingExpense	107645000	usd
CY2021	aat	Rental Expense Operating Expense RentalExpenseOperatingExpense	86980000	usd
CY2023	us-gaap	Interest And Other Income InterestAndOtherIncome	2175000	usd
CY2022	us-gaap	Interest And Other Income InterestAndOtherIncome	225000	usd
CY2021	us-gaap	Interest And Other Income InterestAndOtherIncome	324000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1041000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	850000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	738000	usd
CY2023	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	6515000	usd
CY2022	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	0	usd
CY2021	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	-4000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7649000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-625000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-418000	usd
CY2023	us-gaap	Proceeds From Legal Settlements ProceedsFromLegalSettlements	6300000	usd
CY2021	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-58587000	usd
CY2023	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4271000	usd
CY2023	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	segment
CY2023Q4	aat	Number Of Rooms In Mixed Use Segment All Suite Hotel NumberOfRoomsInMixedUseSegmentAllSuiteHotel	369	room
CY2023	us-gaap	Gross Profit GrossProfit	277207000	usd
CY2022	us-gaap	Gross Profit GrossProfit	270215000	usd
CY2021	us-gaap	Gross Profit GrossProfit	246054000	usd
CY2023	us-gaap	Gross Profit GrossProfit	277207000	usd
CY2022	us-gaap	Gross Profit GrossProfit	270215000	usd
CY2021	us-gaap	Gross Profit GrossProfit	246054000	usd
CY2023	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	35960000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	32143000	usd
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	29879000	usd
CY2023	us-gaap	Depreciation And Amortization DepreciationAndAmortization	119500000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	123338000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	116306000	usd
CY2023	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-64706000	usd
CY2022	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-58232000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7649000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-625000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-418000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	64690000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	55877000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	36593000	usd
CY2023	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	761000	usd
CY2022	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	648000	usd
CY2021	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	564000	usd
CY2023	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	13551000	usd
CY2022	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	11723000	usd
CY2021	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	7653000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	50378000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	43506000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	28376000	usd
CY2023Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	2705315000	usd
CY2022Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	2734556000	usd
CY2023Q4	us-gaap	Notes Payable NotesPayable	75000000	usd
CY2022Q4	us-gaap	Notes Payable NotesPayable	75000000	usd
CY2023	aat	Capital Expenditures And Leasing Commissions CapitalExpendituresAndLeasingCommissions	89887000	usd
CY2022	aat	Capital Expenditures And Leasing Commissions CapitalExpendituresAndLeasingCommissions	121155000	usd
CY2023Q4	us-gaap	Revenues Revenues	112491000	usd
CY2023Q3	us-gaap	Revenues Revenues	111198000	usd
CY2023Q2	us-gaap	Revenues Revenues	109721000	usd
CY2023Q1	us-gaap	Revenues Revenues	107754000	usd
CY2023Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	29399000	usd
CY2023Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	31139000	usd
CY2023Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	31492000	usd
CY2023Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	29716000	usd
CY2023Q4	us-gaap	Profit Loss ProfitLoss	13492000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	15135000	usd
CY2023Q2	us-gaap	Profit Loss ProfitLoss	15397000	usd
CY2023Q1	us-gaap	Profit Loss ProfitLoss	20666000	usd
CY2023Q4	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	193000	usd
CY2023Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	189000	usd
CY2023Q2	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	190000	usd
CY2023Q1	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	189000	usd
CY2023Q4	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	2818000	usd
CY2023Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	3168000	usd
CY2023Q2	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	3224000	usd
CY2023Q1	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	4341000	usd
CY2023Q4	us-gaap	Net Income Loss NetIncomeLoss	10481000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	11778000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	11983000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	16136000	usd
CY2023Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.17
CY2023Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.17
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2023Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2023Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.27
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
CY2022Q4	us-gaap	Revenues Revenues	106000000	usd
CY2022Q3	us-gaap	Revenues Revenues	111023000	usd
CY2022Q2	us-gaap	Revenues Revenues	104155000	usd
CY2022Q1	us-gaap	Revenues Revenues	101470000	usd
CY2022Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	27073000	usd
CY2022Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	31003000	usd
CY2022Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	28316000	usd
CY2022Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	28342000	usd
CY2022Q4	us-gaap	Profit Loss ProfitLoss	12406000	usd
CY2022Q3	us-gaap	Profit Loss ProfitLoss	16369000	usd
CY2022Q2	us-gaap	Profit Loss ProfitLoss	13588000	usd
CY2022Q1	us-gaap	Profit Loss ProfitLoss	13514000	usd
CY2022Q4	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	184000	usd
CY2022Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	155000	usd
CY2022Q2	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	154000	usd
CY2022Q1	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	155000	usd
CY2022Q4	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	2593000	usd
CY2022Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	3442000	usd
CY2022Q2	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	2852000	usd
CY2022Q1	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	2836000	usd
CY2022Q4	us-gaap	Net Income Loss NetIncomeLoss	9629000	usd
CY2022Q3	us-gaap	Net Income Loss NetIncomeLoss	12772000	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	10582000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	10523000	usd
CY2022Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
CY2022Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2022Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.21
CY2022Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
CY2022Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.18
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.18
CY2022Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.18
CY2022Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.18
CY2023Q4	srt	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	75000000	usd
CY2023Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	666352000	usd
CY2023Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	1954013000	usd
CY2023Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Carrying Costs RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts	1121403000	usd
CY2023Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	701266000	usd
CY2023Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	3040502000	usd
CY2023Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1036453000	usd
CY2023Q4	srt	Real Estate Federal Income Tax Basis RealEstateFederalIncomeTaxBasis	2500000000	usd
CY2022Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	3671469000	usd
CY2021Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	3529371000	usd
CY2020Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	3246874000	usd
CY2023	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	0	usd
CY2022	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	44076000	usd
CY2021	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	197754000	usd
CY2023	us-gaap	Real Estate Improvements RealEstateImprovements	78249000	usd
CY2022	us-gaap	Real Estate Improvements RealEstateImprovements	116613000	usd
CY2021	us-gaap	Real Estate Improvements RealEstateImprovements	93455000	usd
CY2023	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	0	usd
CY2022	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	0	usd
CY2021	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	0	usd
CY2023	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	7950000	usd
CY2022	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	18591000	usd
CY2021	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	8712000	usd
CY2023Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	3741768000	usd
CY2022Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	3671469000	usd
CY2021Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	3529371000	usd
CY2022Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	936913000	usd
CY2021Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	847390000	usd
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	754140000	usd
CY2023	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	106306000	usd
CY2022	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	108118000	usd
CY2021	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	101962000	usd
CY2023	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	0	usd
CY2022	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	0	usd
CY2021	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	0	usd
CY2023	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	6766000	usd
CY2022	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	18595000	usd
CY2021	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	8712000	usd
CY2023Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1036453000	usd
CY2022Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	936913000	usd
CY2021Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	847390000	usd

Files In Submission

Name	View Source	Status
0001500217-24-000008-index-headers.html	Edgar Link	pending
0001500217-24-000008-index.html	Edgar Link	pending
0001500217-24-000008.txt	Edgar Link	pending
0001500217-24-000008-xbrl.zip	Edgar Link	pending
aat-20231231.htm	Edgar Link	pending
aat-20231231.xsd	Edgar Link	pending
aat-20231231_g1.jpg	Edgar Link	pending
aat-20231231_g2.jpg	Edgar Link	pending
aat-ex211xq42023ng.htm	Edgar Link	pending
aat-20231231_cal.xml	Edgar Link	unprocessable
aat-20231231_lab.xml	Edgar Link	unprocessable
aat-20231231_htm.xml	Edgar Link	completed
aat-20231231_pre.xml	Edgar Link	unprocessable
aat-ex221xq42023.htm	Edgar Link	pending
aat-ex231eyconsentq42023.htm	Edgar Link	pending
aat-ex311xq42023ng.htm	Edgar Link	pending
aat-ex312xq42023ng.htm	Edgar Link	pending
aat-ex313xq42023ng.htm	Edgar Link	pending
aat-ex314xq42023ng.htm	Edgar Link	pending
aat-ex321xq42023ng.htm	Edgar Link	pending
aat-ex322xq42023ng.htm	Edgar Link	pending
aatdescriptonofsecurities.htm	Edgar Link	pending
aatexecformofrestrictedsto.htm	Edgar Link	pending
aatlp-ex232eyconsentq42023.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
policyforrecoveryoferroneo.htm	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R100.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
R92.htm	Edgar Link	pending
R93.htm	Edgar Link	pending
R94.htm	Edgar Link	pending
R95.htm	Edgar Link	pending
R96.htm	Edgar Link	pending
R97.htm	Edgar Link	pending
R98.htm	Edgar Link	pending
R99.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
aat-20231231_def.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$AAT
American Assets Trust, Inc. Stock $aat

2024 Q1 Form 10-K Financial Statement

#000150021724000008 Filed on February 14, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AAT American Assets Trust, Inc. Stock $aat

2024 Q1 Form 10-K Financial Statement

#000150021724000008 Filed on February 14, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AAT
American Assets Trust, Inc. Stock $aat