$AAT
American Assets Trust, Inc. Stock $aat

$aat Overview Financials Valuation SEC Filings Company Website

2024 Q4 Form 10-Q Financial Statement

#000150021724000053 Filed on November 01, 2024

Income Statement

Concept	2024 Q4	2024 Q3
Revenue		$122.8M
YoY Change		10.44%
Cost Of Revenue		$42.41M
YoY Change		2.68%
Gross Profit		$80.41M
YoY Change		15.05%
Gross Profit Margin		65.47%
Selling, General & Admin		$9.068M
YoY Change		-3.23%
% of Gross Profit		11.28%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization		$33.53M
YoY Change		12.14%
% of Gross Profit		41.7%
Operating Expenses		$42.60M
YoY Change		354.56%
Operating Profit		$37.81M
YoY Change		21.42%
Interest Expense		-$18.23M
YoY Change		11.66%
% of Operating Profit		-48.21%
Other Income/Expense, Net		$1.739M
YoY Change		441.74%
Pretax Income		$21.32M
YoY Change		41.18%
Income Tax		$235.0K
% Of Pretax Income		1.1%
Net Earnings		$16.66M
YoY Change		10.06%
Net Earnings / Revenue		13.56%
Basic Earnings Per Share		$0.28
Diluted Earnings Per Share		$0.22
COMMON SHARES
Basic Shares Outstanding	60.90M shares	60.90M shares
Diluted Shares Outstanding		76.50M shares

Balance Sheet

Concept	2024 Q4	2024 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments		$533.0M
YoY Change		492.23%
Cash & Equivalents		$533.0M
Short-Term Investments
Other Short-Term Assets		$11.80M
YoY Change		7.26%
Inventory
Prepaid Expenses
Receivables		$8.809M
Other Receivables		$0.00
Total Short-Term Assets		$541.8M
YoY Change		397.53%
LONG-TERM ASSETS
Property, Plant & Equipment		$2.672B
YoY Change		-2.38%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets		$809.0K
YoY Change		-46.07%
Total Long-Term Assets		$2.855B
YoY Change		-1.63%
TOTAL ASSETS
Total Short-Term Assets		$541.8M
Total Long-Term Assets		$2.855B
Total Assets		$3.396B
YoY Change		12.81%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable		$74.07M
YoY Change		4.32%
Accrued Expenses		$21.31M
YoY Change		-10.82%
Deferred Revenue
YoY Change
Short-Term Debt		$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities		$83.18M
YoY Change		-19.94%
LONG-TERM LIABILITIES
Long-Term Debt		$2.110B
YoY Change		24.9%
Other Long-Term Liabilities		$65.60M
YoY Change		35.26%
Total Long-Term Liabilities		$2.175B
YoY Change		25.19%
TOTAL LIABILITIES
Total Short-Term Liabilities		$83.18M
Total Long-Term Liabilities		$2.175B
Total Liabilities		$2.210B
YoY Change		19.96%
SHAREHOLDERS EQUITY
Retained Earnings		-$293.0M
YoY Change		8.2%
Common Stock		$1.475B
YoY Change		0.48%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity		$1.187B
YoY Change
Total Liabilities & Shareholders Equity		$3.396B
YoY Change		12.81%

Cashflow Statement

Concept	2024 Q4	2024 Q3
OPERATING ACTIVITIES
Net Income		$16.66M
YoY Change		10.06%
Depreciation, Depletion And Amortization		$33.53M
YoY Change		12.14%
Cash From Operating Activities		$52.40M
YoY Change		1.17%
INVESTING ACTIVITIES
Capital Expenditures		$24.44M
YoY Change		23.41%
Acquisitions
YoY Change
Other Investing Activities		-$1.904M
YoY Change		46.46%
Cash From Investing Activities		-$26.34M
YoY Change		24.83%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities		392.1M
YoY Change		-1643.54%
NET CHANGE
Cash From Operating Activities		52.40M
Cash From Investing Activities		-26.34M
Cash From Financing Activities		392.1M
Net Change In Cash		418.1M
YoY Change		7789.13%
FREE CASH FLOW
Cash From Operating Activities		$52.40M
Capital Expenditures		$24.44M
Free Cash Flow		$27.97M
YoY Change		-12.6%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2024
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Entity Central Index Key EntityCentralIndexKey	0001500217
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Period End Date DocumentPeriodEndDate	2024-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Trading Symbol TradingSymbol	AAT
	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2024Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	60901583	shares
CY2024Q3	us-gaap	Rental Properties RentalProperties	3564563000	usd
CY2023Q4	us-gaap	Rental Properties RentalProperties	3502251000	usd
CY2024Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	205692000	usd
CY2023Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	239030000	usd
CY2024Q3	us-gaap	Land Available For Development LandAvailableForDevelopment	487000	usd
CY2023Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	487000	usd
CY2024Q3	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	3770742000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	82888000	usd
CY2023Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	7624000	usd
CY2023Q4	us-gaap	Secured Debt SecuredDebt	74669000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	92348000	usd
	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-48422000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7272000	usd
	us-gaap	Profit Loss ProfitLoss	51198000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	10733000	usd
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.66
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76328726	shares
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.990
	us-gaap	Profit Loss ProfitLoss	51198000	usd
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	11805000	usd
CY2024Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	12769000	usd
CY2023Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	12494000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1185525000	usd
CY2023Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2035000	usd
CY2023Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1179726000	usd
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2024Q3	us-gaap	Accounts Receivable Net AccountsReceivableNet	8809000	usd
CY2024Q3	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	89772000	usd
CY2024Q3	us-gaap	Other Assets OtherAssets	92468000	usd
CY2024Q3	us-gaap	Assets Assets	3396318000	usd
CY2024Q3	us-gaap	Unsecured Debt UnsecuredDebt	2034843000	usd
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	60895786	shares
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	315664000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	86128000	usd
	us-gaap	Other Operating Income OtherOperatingIncome	28731000	usd
	us-gaap	Revenues Revenues	344395000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	90707000	usd
	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	33133000	usd
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	26647000	usd
	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	34117000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	94757000	usd
	us-gaap	Costs And Expenses CostsAndExpenses	245244000	usd
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	26488000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	89592000	usd
	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-50773000	usd
	us-gaap	Costs And Expenses CostsAndExpenses	236325000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	99151000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	12829000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	47821000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	12857000	usd
	us-gaap	Profit Loss ProfitLoss	61235000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	39897000	usd
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.79
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60314377	shares
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.79
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76495914	shares
	us-gaap	Profit Loss ProfitLoss	61235000	usd
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.005
CY2024Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	3373000	usd
CY2023Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	3310000	usd
CY2024Q3	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1098477000	usd
	us-gaap	Revenues Revenues	328673000	usd
	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 100
	dei	Entity Address City Or Town EntityAddressCityOrTown	San Diego
	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	92121
	dei	City Area Code CityAreaCode	858
	dei	Local Phone Number LocalPhoneNumber	350-2600
CY2023Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1036453000	usd
CY2024Q3	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	2672265000	usd
CY2023Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	2705315000	usd
CY2024Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	533004000	usd
CY2024Q3	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	74067000	usd
CY2023Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	61312000	usd
CY2024Q3	us-gaap	Minority Interest MinorityInterest	-48640000	usd
CY2024Q3	us-gaap	Security Deposit Liability SecurityDepositLiability	9111000	usd
CY2023Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	8880000	usd
CY2024Q3	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	65600000	usd
CY2023Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	71187000	usd
CY2024Q3	us-gaap	Liabilities Liabilities	2258357000	usd
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	60895786	shares
CY2023Q4	us-gaap	Minority Interest MinorityInterest	-44183000	usd
CY2024Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1137961000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1153675000	usd
	dei	Entity Registrant Name EntityRegistrantName	AMERICAN ASSETS TRUST, INC.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
	dei	Entity Address Address Line1 EntityAddressAddressLine1	3420 Carmel Mountain Road
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	3741768000	usd
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	490000000	shares
CY2024Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	60901583	shares
CY2024Q3	us-gaap	Common Stock Value CommonStockValue	609000	usd
CY2024Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	60901583	shares
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	609000	usd
CY2024Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1474554000	usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1469206000	usd
CY2024Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	4475000	usd
CY2024Q3	us-gaap	Stockholders Equity StockholdersEquity	1186601000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	8282000	usd
CY2024Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3396318000	usd
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CY2023Q3	us-gaap	Revenues Revenues	111198000	usd
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CY2024Q3	us-gaap	Revenues Revenues	122810000	usd
CY2024Q3	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	31361000	usd
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CY2024Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	33529000	usd
CY2024Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	9068000	usd
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CY2024Q3	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-18229000	usd
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CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	11778000	usd
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2024Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76501806	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76332218	shares
CY2024Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2023Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.330
CY2024Q3	us-gaap	Profit Loss ProfitLoss	21318000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	15135000	usd
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2024Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
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	dei	Document Quarterly Report DocumentQuarterlyReport	true
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	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	312105000	usd
	us-gaap	Net Investment In Lease Credit Loss Expense Reversal NetInvestmentInLeaseCreditLossExpenseReversal	1095000	usd
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	us-gaap	Net Investment In Lease Credit Loss Expense Reversal NetInvestmentInLeaseCreditLossExpenseReversal	1088000	usd
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	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	295000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	1051000	usd
CY2024Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	16142000	usd
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	11114000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	44599000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	5348000	usd
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CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1153675000	usd
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CY2024Q1	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25821000	usd
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CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	98000	usd
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CY2024Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1746000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-850000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	99000	usd
CY2024Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1145656000	usd
CY2024Q3	us-gaap	Profit Loss ProfitLoss	21318000	usd
CY2024Q3	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25822000	usd
CY2024Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1985000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	98000	usd
CY2024Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1137961000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	854000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	6254000	usd
CY2023Q2	us-gaap	Profit Loss ProfitLoss	15397000	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25379000	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2110000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	4360000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	98000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1176116000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	15135000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25379000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2109000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	768000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	99000	usd
CY2023Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1168650000	usd
	us-gaap	Profit Loss ProfitLoss	61235000	usd
	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-5329000	usd
	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-6167000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	94757000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	89592000	usd
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2558000	usd
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2553000	usd
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	1345000	usd
	aat	Other Non Cash Interest Expense OtherNonCashInterestExpense	295000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1305000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	588000	usd
CY2023Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	321000	usd
CY2024Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	194000	usd
	us-gaap	Profit Loss ProfitLoss	61235000	usd
	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-5329000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	568000	usd
	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-6167000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	94757000	usd
CY2024Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60320269	shares
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	89592000	usd
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60150681	shares
CY2024Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2558000	usd
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2553000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	98000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	99000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	295000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	1051000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	53006000	usd
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	11114000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1153675000	usd
CY2024Q1	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25821000	usd
CY2024Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1617000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	1392000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	98000	usd
CY2024Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1155388000	usd
CY2024Q2	us-gaap	Profit Loss ProfitLoss	15294000	usd
CY2024Q2	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25823000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-850000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	99000	usd
CY2024Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1145656000	usd
CY2024Q3	us-gaap	Profit Loss ProfitLoss	21318000	usd
CY2024Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1985000	usd
CY2024Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1137961000	usd
CY2023Q2	us-gaap	Profit Loss ProfitLoss	15397000	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25379000	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2110000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	4360000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	98000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1176116000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	15135000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25379000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2109000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	768000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	99000	usd
	us-gaap	Net Investment In Lease Credit Loss Expense Reversal NetInvestmentInLeaseCreditLossExpenseReversal	1095000	usd
	us-gaap	Net Investment In Lease Credit Loss Expense Reversal NetInvestmentInLeaseCreditLossExpenseReversal	1088000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	5348000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	6254000	usd
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	1345000	usd
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	0	usd
	aat	Other Non Cash Interest Expense OtherNonCashInterestExpense	295000	usd
	aat	Other Non Cash Interest Expense OtherNonCashInterestExpense	1051000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1305000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	588000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1659000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	15135000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2062000	usd
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	10881000	usd
CY2023Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	189000	usd
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	9126000	usd
	aat	Increase Decrease In Security Deposits Payable IncreaseDecreaseInSecurityDepositsPayable	230000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	585000	usd
CY2024Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	4467000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	295000	usd
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	11114000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	41892000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1153675000	usd
CY2024Q1	us-gaap	Profit Loss ProfitLoss	24623000	usd
CY2024Q1	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25821000	usd
CY2024Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1617000	usd
CY2024Q2	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25823000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	98000	usd
CY2024Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1137961000	usd
CY2023Q1	us-gaap	Profit Loss ProfitLoss	20666000	usd
	aat	Increase Decrease In Security Deposits Payable IncreaseDecreaseInSecurityDepositsPayable	252000	usd
CY2023Q2	us-gaap	Profit Loss ProfitLoss	15397000	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25379000	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2110000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	4360000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1176116000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	15135000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25379000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2109000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	768000	usd
CY2023Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1168650000	usd
	us-gaap	Profit Loss ProfitLoss	61235000	usd
	us-gaap	Profit Loss ProfitLoss	51198000	usd
	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-5329000	usd
	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-6167000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	94757000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	89592000	usd
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2558000	usd
	us-gaap	Net Investment In Lease Credit Loss Expense Reversal NetInvestmentInLeaseCreditLossExpenseReversal	1095000	usd
	us-gaap	Net Investment In Lease Credit Loss Expense Reversal NetInvestmentInLeaseCreditLossExpenseReversal	1088000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	5348000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	6254000	usd
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	1345000	usd
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	0	usd
	aat	Other Non Cash Interest Expense OtherNonCashInterestExpense	295000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1659000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	847000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2584000	usd
	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	267000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	166464000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	149905000	usd
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	51051000	usd
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	64229000	usd
	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	5712000	usd
	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	5999000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-56763000	usd
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60147189	shares
CY2024Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	98000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	1051000	usd
CY2023Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	15804000	usd
	aat	Increase Decrease In Security Deposits Payable IncreaseDecreaseInSecurityDepositsPayable	230000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	56404000	usd
	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	557000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	53006000	usd
CY2024Q1	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25821000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	1392000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	98000	usd
CY2024Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1155388000	usd
CY2024Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1137961000	usd
CY2023Q1	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25377000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-2269000	usd
CY2023Q2	us-gaap	Profit Loss ProfitLoss	15397000	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25379000	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2110000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	4360000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	98000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1176116000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	15135000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	25379000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2109000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	768000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	99000	usd
CY2023Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1168650000	usd
	us-gaap	Profit Loss ProfitLoss	61235000	usd
	us-gaap	Profit Loss ProfitLoss	51198000	usd
	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-5329000	usd
	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-6167000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	94757000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	89592000	usd
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2558000	usd
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2553000	usd
	us-gaap	Net Investment In Lease Credit Loss Expense Reversal NetInvestmentInLeaseCreditLossExpenseReversal	1095000	usd
	us-gaap	Net Investment In Lease Credit Loss Expense Reversal NetInvestmentInLeaseCreditLossExpenseReversal	1088000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	5348000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	6254000	usd
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	1345000	usd
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	0	usd
	aat	Other Non Cash Interest Expense OtherNonCashInterestExpense	295000	usd
	aat	Other Non Cash Interest Expense OtherNonCashInterestExpense	1051000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1305000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	588000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2584000	usd
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	10881000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	166464000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	149905000	usd
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	51051000	usd
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	64229000	usd
	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	5712000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-56763000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-70228000	usd
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	847000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2584000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2062000	usd
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	10881000	usd
	aat	Increase Decrease In Security Deposits Payable IncreaseDecreaseInSecurityDepositsPayable	252000	usd
	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	267000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	166464000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	149905000	usd
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	51051000	usd
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	64229000	usd
	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	5712000	usd
	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	5999000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-70228000	usd
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	usd
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	225000000	usd
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	usd
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	150000000	usd
	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	0	usd
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	36000000	usd
	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	523273000	usd
	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	0	usd
	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	100000000	usd
	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	0	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	5392000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2145000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	77466000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	76135000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	340415000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	40397000	usd
CY2023Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	89968000	usd
CY2024Q3	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	31	property
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	847000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2584000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2062000	usd
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	10881000	usd
	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	557000	usd
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	51051000	usd
	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	5712000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-56763000	usd
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	usd
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	usd
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	150000000	usd
	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	0	usd
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	100000000	usd
	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-50773000	usd
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	36000000	usd
	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	0	usd
	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	100000000	usd
	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	0	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	5392000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2145000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	77466000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	76135000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-39280000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	40397000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	82888000	usd
CY2023Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	89968000	usd
CY2024Q3	dei	Entity Number Of Employees EntityNumberOfEmployees	230	employee
CY2024Q3	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	31	property
CY2024Q3	aat	Real Estate Properties Held For Development RealEstatePropertiesHeldForDevelopment	3	property
	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	5745000	usd
	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-48422000	usd
	us-gaap	Interest Paid Net InterestPaidNet	54047000	usd
	us-gaap	Interest Paid Net InterestPaidNet	51976000	usd
	us-gaap	Construction In Progress Expenditures Incurred But Not Yet Paid ConstructionInProgressExpendituresIncurredButNotYetPaid	17040000	usd
	aat	Increase Decrease Accrued Leasing Commissions IncreaseDecreaseAccruedLeasingCommissions	2622000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-70228000	usd
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	usd
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	usd
	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	0	usd
	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	523273000	usd
	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	0	usd
	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	100000000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	5392000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2145000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	77466000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	76135000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-39280000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	450116000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	40397000	usd
CY2023Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	89968000	usd
	us-gaap	Use Of Estimates UseOfEstimates	<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%">The preparation of financial statements in conformity with GAAP requires us 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 our best judgment, after considering past, current and expected events and economic conditions. Actual results could differ from these estimates.</span></div>
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	usd
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	150000000	usd
	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	100000000	usd
	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	0	usd
	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	0	usd
	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	100000000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2145000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	77466000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	76135000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	40397000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	49571000	usd
CY2024Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	533004000	usd
CY2023Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	89968000	usd
CY2024Q3	dei	Entity Number Of Employees EntityNumberOfEmployees	230	employee
CY2024Q3	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	31	property
	us-gaap	Use Of Estimates UseOfEstimates	<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%">The preparation of financial statements in conformity with GAAP requires us 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 our best judgment, after considering past, current and expected events and economic conditions. Actual results could differ from these estimates.</span></div>
	us-gaap	Use Of Estimates UseOfEstimates	<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%">The preparation of financial statements in conformity with GAAP requires us 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 our best judgment, after considering past, current and expected events and economic conditions. Actual results could differ from these estimates.</span></div>
	us-gaap	Interest Costs Incurred InterestCostsIncurred	56681000	usd
	us-gaap	Interest Costs Incurred InterestCostsIncurred	54167000	usd
	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	5745000	usd
	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-50773000	usd
	us-gaap	Interest Paid Net InterestPaidNet	54047000	usd
	us-gaap	Interest Paid Net InterestPaidNet	51976000	usd
	us-gaap	Income Taxes Paid IncomeTaxesPaid	1035000	usd
	us-gaap	Construction In Progress Expenditures Incurred But Not Yet Paid ConstructionInProgressExpendituresIncurredButNotYetPaid	17040000	usd
	aat	Increase Decrease Accrued Leasing Commissions IncreaseDecreaseAccruedLeasingCommissions	2622000	usd
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	segment
CY2024Q3	aat	Number Of Rooms In Mixed Use Segment All Suite Hotel NumberOfRoomsInMixedUseSegmentAllSuiteHotel	369	room
	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, net of valuation adjustments, based on management's assessment of credit, collection and other business risks.</span></div>We make estimates of the collectability of our current accounts receivable and straight-line rents receivable which require significant judgment by management. The collectability of receivables is affected by numerous different factors including current economic conditions, the impact of 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 credit held with respect to tenants, and the ability of tenants to perform under the terms of their lease agreement.
CY2024Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1600000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1400000	usd
	us-gaap	Interest Costs Incurred InterestCostsIncurred	56681000	usd
	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	5908000	usd
	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-48422000	usd
	us-gaap	Interest Paid Net InterestPaidNet	54047000	usd
	us-gaap	Interest Paid Net InterestPaidNet	51976000	usd
	us-gaap	Income Taxes Paid IncomeTaxesPaid	1035000	usd
	us-gaap	Income Taxes Paid IncomeTaxesPaid	1122000	usd
	us-gaap	Construction In Progress Expenditures Incurred But Not Yet Paid ConstructionInProgressExpendituresIncurredButNotYetPaid	17081000	usd
	us-gaap	Construction In Progress Expenditures Incurred But Not Yet Paid ConstructionInProgressExpendituresIncurredButNotYetPaid	17040000	usd
	aat	Increase Decrease Accrued Leasing Commissions IncreaseDecreaseAccruedLeasingCommissions	2622000	usd
	aat	Increase Decrease Accrued Leasing Commissions IncreaseDecreaseAccruedLeasingCommissions	2086000	usd
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	segment
CY2024Q3	aat	Number Of Rooms In Mixed Use Segment All Suite Hotel NumberOfRoomsInMixedUseSegmentAllSuiteHotel	369	room
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1400000	usd
	us-gaap	Interest Costs Incurred InterestCostsIncurred	56681000	usd
	us-gaap	Interest Costs Incurred InterestCostsIncurred	54167000	usd
	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	5908000	usd
	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	5745000	usd
	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-50773000	usd
	us-gaap	Interest Paid Net InterestPaidNet	51976000	usd
	us-gaap	Income Taxes Paid IncomeTaxesPaid	1035000	usd
	us-gaap	Construction In Progress Expenditures Incurred But Not Yet Paid ConstructionInProgressExpendituresIncurredButNotYetPaid	17040000	usd
	aat	Increase Decrease Accrued Leasing Commissions IncreaseDecreaseAccruedLeasingCommissions	2622000	usd
	aat	Increase Decrease Accrued Leasing Commissions IncreaseDecreaseAccruedLeasingCommissions	2086000	usd
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	segment
CY2024Q3	aat	Number Of Rooms In Mixed Use Segment All Suite Hotel NumberOfRoomsInMixedUseSegmentAllSuiteHotel	369	room
	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, net of valuation adjustments, based on management's assessment of credit, collection and other business risks.</span></div>We make estimates of the collectability of our current accounts receivable and straight-line rents receivable which require significant judgment by management. The collectability of receivables is affected by numerous different factors including current economic conditions, the impact of 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 credit held with respect to tenants, and the ability of tenants to perform under the terms of their lease agreement.
CY2024Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1600000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1400000	usd
	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, net of valuation adjustments, based on management's assessment of credit, collection and other business risks.</span></div>We make estimates of the collectability of our current accounts receivable and straight-line rents receivable which require significant judgment by management. The collectability of receivables is affected by numerous different factors including current economic conditions, the impact of 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 credit held with respect to tenants, and the ability of tenants to perform under the terms of their lease agreement.
CY2024Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1600000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1400000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	15172000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	18664000	usd
CY2024Q3	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	48732000	usd
CY2023Q4	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	50624000	usd
CY2024Q3	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	34302000	usd
CY2023Q4	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	34087000	usd
CY2023Q4	us-gaap	Below Market Lease Net BelowMarketLeaseNet	16537000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	15172000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	18664000	usd
CY2024Q3	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	48732000	usd
CY2023Q4	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	50624000	usd
CY2024Q3	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	34302000	usd
CY2023Q4	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	34087000	usd
CY2024Q3	us-gaap	Below Market Lease Net BelowMarketLeaseNet	14430000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	15172000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	18664000	usd
CY2024Q3	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	48732000	usd
CY2023Q4	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	50624000	usd
CY2024Q3	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	34302000	usd
CY2023Q4	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	34087000	usd
CY2024Q3	us-gaap	Below Market Lease Net BelowMarketLeaseNet	14430000	usd
CY2023Q4	us-gaap	Below Market Lease Net BelowMarketLeaseNet	16537000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	15172000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	18664000	usd
CY2024Q3	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	48732000	usd
CY2023Q4	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	50624000	usd
CY2024Q3	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	34302000	usd
CY2023Q4	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	34087000	usd
CY2024Q3	us-gaap	Below Market Lease Net BelowMarketLeaseNet	14430000	usd
	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	900000	usd
	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	900000	usd
CY2024Q3	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	51815000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	47978000	usd
CY2024Q3	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	36581000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	36721000	usd
CY2024Q3	us-gaap	Derivative Assets DerivativeAssets	4773000	usd
	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	900000	usd
CY2024Q3	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	51815000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	47978000	usd
CY2024Q3	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	36581000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	36721000	usd
CY2024Q3	us-gaap	Derivative Assets DerivativeAssets	4773000	usd
CY2023Q4	us-gaap	Derivative Assets DerivativeAssets	7963000	usd
CY2024Q3	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	1144000	usd
CY2023Q4	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	1205000	usd
CY2024Q3	us-gaap	Incentive To Lessee IncentiveToLessee	2057000	usd
CY2023Q4	us-gaap	Incentive To Lessee IncentiveToLessee	1232000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2004000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1813000	usd
CY2024Q3	us-gaap	Other Finite Lived Intangible Assets Gross OtherFiniteLivedIntangibleAssetsGross	1647000	usd
CY2023Q4	us-gaap	Other Finite Lived Intangible Assets Gross OtherFiniteLivedIntangibleAssetsGross	1809000	usd
CY2024Q3	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	1782000	usd
CY2023Q4	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	1296000	usd
CY2024Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	809000	usd
CY2024Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	19630000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	21503000	usd
CY2024Q3	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	11799000	usd
CY2023Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	10457000	usd
CY2024Q3	us-gaap	Other Assets OtherAssets	92468000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	99644000	usd
	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	900000	usd
CY2024Q3	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	51815000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	47978000	usd
CY2024Q3	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	36581000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	36721000	usd
CY2024Q3	us-gaap	Derivative Assets DerivativeAssets	4773000	usd
CY2023Q4	us-gaap	Derivative Assets DerivativeAssets	7963000	usd
CY2024Q3	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	1144000	usd
CY2023Q4	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	1205000	usd
CY2024Q3	us-gaap	Incentive To Lessee IncentiveToLessee	2057000	usd
CY2023Q4	us-gaap	Incentive To Lessee IncentiveToLessee	1232000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2004000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1813000	usd
CY2024Q3	us-gaap	Other Finite Lived Intangible Assets Gross OtherFiniteLivedIntangibleAssetsGross	1647000	usd
CY2024Q3	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	1782000	usd
CY2023Q4	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	1296000	usd
CY2024Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	809000	usd
CY2024Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	19630000	usd
CY2024Q3	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	11799000	usd
CY2023Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	10457000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	99644000	usd
CY2024Q3	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	51815000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	47978000	usd
CY2024Q3	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	36581000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	36721000	usd
CY2024Q3	us-gaap	Derivative Assets DerivativeAssets	4773000	usd
CY2023Q4	us-gaap	Derivative Assets DerivativeAssets	7963000	usd
CY2024Q3	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	1144000	usd
CY2023Q4	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	1205000	usd
CY2024Q3	us-gaap	Incentive To Lessee IncentiveToLessee	2057000	usd
CY2023Q4	us-gaap	Incentive To Lessee IncentiveToLessee	1232000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1813000	usd
CY2024Q3	us-gaap	Other Finite Lived Intangible Assets Gross OtherFiniteLivedIntangibleAssetsGross	1647000	usd
CY2024Q3	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	1782000	usd
CY2023Q4	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	1296000	usd
CY2024Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	809000	usd
CY2023Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1295000	usd
CY2024Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	19630000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	21503000	usd
CY2024Q3	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	11799000	usd
CY2023Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	10457000	usd
CY2024Q3	us-gaap	Other Assets OtherAssets	92468000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	99644000	usd
CY2023Q4	us-gaap	Derivative Assets DerivativeAssets	7963000	usd
CY2024Q3	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	1144000	usd
CY2023Q4	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	1205000	usd
CY2024Q3	us-gaap	Incentive To Lessee IncentiveToLessee	2057000	usd
CY2023Q4	us-gaap	Incentive To Lessee IncentiveToLessee	1232000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2004000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1813000	usd
CY2024Q3	us-gaap	Other Finite Lived Intangible Assets Gross OtherFiniteLivedIntangibleAssetsGross	1647000	usd
CY2024Q3	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	1782000	usd
CY2023Q4	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	1296000	usd
CY2024Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	809000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	21503000	usd
CY2024Q3	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	11799000	usd
CY2023Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	10457000	usd
CY2024Q3	us-gaap	Other Assets OtherAssets	92468000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	99644000	usd
CY2024Q3	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	14430000	usd
CY2023Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	16537000	usd
CY2024Q3	us-gaap	Deferred Revenue DeferredRevenue	17994000	usd
CY2023Q4	us-gaap	Deferred Revenue DeferredRevenue	17261000	usd
CY2024Q3	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	2847000	usd
CY2023Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	2627000	usd
CY2024Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	784000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	784000	usd
CY2024Q3	us-gaap	Deferred Rent Credit DeferredRentCredit	8183000	usd
CY2023Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	10666000	usd
CY2024Q3	us-gaap	Other Liabilities OtherLiabilities	49000	usd
CY2023Q4	us-gaap	Other Liabilities OtherLiabilities	58000	usd
CY2024Q3	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	65600000	usd
CY2023Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	71187000	usd
CY2024Q3	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	14430000	usd
CY2023Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	16537000	usd
CY2024Q3	us-gaap	Deferred Revenue DeferredRevenue	17994000	usd
CY2023Q4	us-gaap	Deferred Revenue DeferredRevenue	17261000	usd
CY2024Q3	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	2847000	usd
CY2023Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	2627000	usd
CY2024Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	784000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	784000	usd
CY2024Q3	us-gaap	Deferred Rent Credit DeferredRentCredit	8183000	usd
CY2023Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	10666000	usd
CY2024Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	21313000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	23254000	usd
CY2024Q3	us-gaap	Other Liabilities OtherLiabilities	49000	usd
CY2023Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	71187000	usd
CY2024Q3	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	14430000	usd
CY2023Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	16537000	usd
CY2024Q3	us-gaap	Deferred Revenue DeferredRevenue	17994000	usd
CY2023Q4	us-gaap	Deferred Revenue DeferredRevenue	17261000	usd
CY2024Q3	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	2847000	usd
CY2024Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	784000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	784000	usd
CY2024Q3	us-gaap	Deferred Rent Credit DeferredRentCredit	8183000	usd
CY2023Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	10666000	usd
CY2024Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	21313000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	23254000	usd
CY2024Q3	us-gaap	Other Liabilities OtherLiabilities	49000	usd
CY2023Q4	us-gaap	Other Liabilities OtherLiabilities	58000	usd
CY2023Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	71187000	usd
CY2023Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	16537000	usd
CY2023Q4	us-gaap	Deferred Revenue DeferredRevenue	17261000	usd
CY2024Q3	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	2847000	usd
CY2024Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	784000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	784000	usd
CY2024Q3	us-gaap	Deferred Rent Credit DeferredRentCredit	8183000	usd
CY2023Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	10666000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	23254000	usd
CY2024Q3	us-gaap	Other Liabilities OtherLiabilities	49000	usd
CY2024Q3	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	65600000	usd
CY2024Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2024Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2024Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2024Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2024Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2024Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2024Q3	us-gaap	Restricted Stock Expense RestrictedStockExpense	2000000.0	usd
CY2023Q3	us-gaap	Restricted Stock Expense RestrictedStockExpense	2100000	usd
	us-gaap	Restricted Stock Expense RestrictedStockExpense	5300000	usd
	us-gaap	Restricted Stock Expense RestrictedStockExpense	6300000	usd
CY2024Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	4700000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	15135000	usd
	us-gaap	Profit Loss ProfitLoss	61235000	usd
	us-gaap	Profit Loss ProfitLoss	51198000	usd
CY2023Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	189000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	568000	usd
CY2024Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	4467000	usd
CY2023Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	3168000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	12829000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	10733000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	11778000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	47821000	usd
CY2024Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	16657000	usd
CY2023Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	11778000	usd
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	47821000	usd
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	39897000	usd
CY2024Q3	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	4467000	usd
CY2023Q3	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	3168000	usd
	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	12829000	usd
	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	10733000	usd
CY2024Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2024Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2024Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2024Q3	us-gaap	Restricted Stock Expense RestrictedStockExpense	2000000.0	usd
CY2023Q3	us-gaap	Restricted Stock Expense RestrictedStockExpense	2100000	usd
	us-gaap	Restricted Stock Expense RestrictedStockExpense	6300000	usd
CY2024Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	4700000	usd
CY2024Q3	us-gaap	Profit Loss ProfitLoss	21318000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	15135000	usd
	us-gaap	Profit Loss ProfitLoss	61235000	usd
	us-gaap	Profit Loss ProfitLoss	51198000	usd
CY2024Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	194000	usd
CY2023Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	189000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	585000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	568000	usd
CY2024Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	4467000	usd
CY2023Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	3168000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	12829000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	10733000	usd
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	16657000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	11778000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	47821000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	39897000	usd
CY2024Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	16657000	usd
CY2023Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	11778000	usd
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	47821000	usd
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	39897000	usd
CY2024Q3	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	4467000	usd
CY2023Q3	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	3168000	usd
	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	12829000	usd
	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	10733000	usd
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	21124000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	14946000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	60650000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	50630000	usd
CY2024Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60320269	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60150681	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60314377	shares
CY2024Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2024Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2024Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.335
CY2024Q3	us-gaap	Restricted Stock Expense RestrictedStockExpense	2000000.0	usd
CY2023Q3	us-gaap	Restricted Stock Expense RestrictedStockExpense	2100000	usd
	us-gaap	Restricted Stock Expense RestrictedStockExpense	6300000	usd
CY2024Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	4700000	usd
CY2024Q3	us-gaap	Profit Loss ProfitLoss	21318000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	15135000	usd
	us-gaap	Profit Loss ProfitLoss	51198000	usd
CY2024Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	194000	usd
CY2023Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	189000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	568000	usd
CY2024Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	4467000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	12829000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	10733000	usd
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	16657000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	11778000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	39897000	usd
CY2024Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	16657000	usd
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	47821000	usd
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	39897000	usd
CY2024Q3	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	4467000	usd
CY2023Q3	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	3168000	usd
	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	12829000	usd
	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	10733000	usd
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	21124000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	14946000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	60650000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	50630000	usd
CY2024Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60320269	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60150681	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60314377	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60147189	shares
CY2024Q3	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
CY2023Q3	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
CY2024Q3	us-gaap	Restricted Stock Expense RestrictedStockExpense	2000000.0	usd
CY2023Q3	us-gaap	Restricted Stock Expense RestrictedStockExpense	2100000	usd
	us-gaap	Restricted Stock Expense RestrictedStockExpense	5300000	usd
CY2024Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	4700000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	15135000	usd
	us-gaap	Profit Loss ProfitLoss	61235000	usd
	us-gaap	Profit Loss ProfitLoss	51198000	usd
CY2024Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	194000	usd
CY2023Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	189000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	585000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	568000	usd
CY2023Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	3168000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	12829000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	10733000	usd
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	16657000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	47821000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	39897000	usd
CY2024Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	16657000	usd
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	47821000	usd
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	39897000	usd
CY2024Q3	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	4467000	usd
CY2023Q3	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	3168000	usd
	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	10733000	usd
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	21124000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	14946000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	60650000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	50630000	usd
CY2024Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60320269	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60150681	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60147189	shares
CY2024Q3	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
CY2023Q3	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
CY2024Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76501806	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76495914	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76328726	shares
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.79
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.79
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	21124000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	14946000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	60650000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	50630000	usd
CY2024Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60320269	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60150681	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60314377	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60147189	shares
CY2024Q3	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
CY2023Q3	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
CY2024Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76501806	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76332218	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76495914	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76328726	shares
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.79
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.66
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.79
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
CY2024Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	800000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	900000	usd
CY2024Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	800000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	800000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	200000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	700000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	800000	usd
	us-gaap	Loss On Contract Termination For Default LossOnContractTerminationForDefault	8100000	usd
	aat	Operating Lease Rental Period OperatingLeaseRentalPeriod	P12M
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear	57370000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	252268000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	240732000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	212770000	usd
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60147189	shares
CY2024Q3	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
CY2023Q3	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76332218	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76495914	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76328726	shares
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.79
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.66
CY2024Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
CY2024Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	800000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	900000	usd
CY2024Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	800000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	800000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	200000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	700000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	300000	usd
	us-gaap	Loss On Contract Termination For Default LossOnContractTerminationForDefault	8100000	usd
	aat	Operating Lease Rental Period OperatingLeaseRentalPeriod	P12M
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear	57370000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	252268000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	240732000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	212770000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	165991000	usd
CY2024Q3	aat	Lessor Operating Lease Payment To Be Received After Year Four LessorOperatingLeasePaymentToBeReceivedAfterYearFour	283059000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	1212190000	usd
CY2024Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76501806	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76332218	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76495914	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76328726	shares
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.79
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.66
CY2024Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.79
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
CY2024Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	800000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	900000	usd
CY2024Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	800000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	800000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	200000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	700000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	300000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	800000	usd
	us-gaap	Loss On Contract Termination For Default LossOnContractTerminationForDefault	8100000	usd
	aat	Operating Lease Rental Period OperatingLeaseRentalPeriod	P12M
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear	57370000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	252268000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	240732000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	212770000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	165991000	usd
CY2024Q3	aat	Lessor Operating Lease Payment To Be Received After Year Four LessorOperatingLeasePaymentToBeReceivedAfterYearFour	283059000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	1212190000	usd
CY2024Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	800000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	900000	usd
CY2024Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	800000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	800000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	200000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	700000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	800000	usd
	us-gaap	Loss On Contract Termination For Default LossOnContractTerminationForDefault	8100000	usd
	aat	Operating Lease Rental Period OperatingLeaseRentalPeriod	P12M
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear	57370000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	252268000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	240732000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	212770000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	165991000	usd
CY2024Q3	aat	Lessor Operating Lease Payment To Be Received After Year Four LessorOperatingLeasePaymentToBeReceivedAfterYearFour	283059000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	1212190000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	870000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	3531000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3584000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3584000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3584000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2799000	usd
CY2024Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	21313000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	165991000	usd
CY2024Q3	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	1212190000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	870000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	3531000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3584000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3584000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3584000	usd
CY2024Q3	aat	Lessee Operating Lease Liability To Be Paid After Year Four LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	8959000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	24112000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2799000	usd
CY2024Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	21313000	usd
CY2024Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	970000	usd
CY2023Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	932000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	2756000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	2786000	usd
CY2024Q3	us-gaap	Sublease Income SubleaseIncome	880000	usd
CY2023Q3	us-gaap	Sublease Income SubleaseIncome	978000	usd
	us-gaap	Sublease Income SubleaseIncome	2558000	usd
	us-gaap	Sublease Income SubleaseIncome	2648000	usd
CY2024Q3	aat	Lease Income Cost LeaseIncomeCost	-90000	usd
CY2023Q3	aat	Lease Income Cost LeaseIncomeCost	46000	usd
	aat	Lease Income Cost LeaseIncomeCost	-198000	usd
	aat	Lease Income Cost LeaseIncomeCost	-138000	usd
CY2024Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y9M18D
CY2024Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0319
	us-gaap	Operating Lease Payments OperatingLeasePayments	2559000	usd
	us-gaap	Operating Lease Payments OperatingLeasePayments	2484000	usd
CY2024Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	845000	usd
CY2023Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	905000	usd
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	2186000	usd
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	2065000	usd
CY2024Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11446000	usd
CY2023Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11893000	usd
CY2024Q3	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	648000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	870000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	3531000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3584000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3584000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3584000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	24112000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2799000	usd
CY2024Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	21313000	usd
CY2024Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	970000	usd
CY2023Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	932000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	2756000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	2786000	usd
CY2024Q3	us-gaap	Sublease Income SubleaseIncome	880000	usd
CY2023Q3	us-gaap	Sublease Income SubleaseIncome	978000	usd
	us-gaap	Sublease Income SubleaseIncome	2558000	usd
	us-gaap	Sublease Income SubleaseIncome	2648000	usd
CY2024Q3	aat	Lease Income Cost LeaseIncomeCost	-90000	usd
CY2023Q3	aat	Lease Income Cost LeaseIncomeCost	46000	usd
	aat	Lease Income Cost LeaseIncomeCost	-198000	usd
	aat	Lease Income Cost LeaseIncomeCost	-138000	usd
CY2024Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y9M18D
CY2024Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0319
	us-gaap	Operating Lease Payments OperatingLeasePayments	2559000	usd
	us-gaap	Operating Lease Payments OperatingLeasePayments	2484000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	870000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	3531000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3584000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3584000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3584000	usd
CY2024Q3	aat	Lessee Operating Lease Liability To Be Paid After Year Four LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	8959000	usd
CY2024Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	24112000	usd
CY2024Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	21313000	usd
CY2024Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	970000	usd
CY2023Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	932000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	2756000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	2786000	usd
CY2023Q3	us-gaap	Sublease Income SubleaseIncome	978000	usd
	us-gaap	Sublease Income SubleaseIncome	2558000	usd
	us-gaap	Sublease Income SubleaseIncome	2648000	usd
CY2024Q3	aat	Lease Income Cost LeaseIncomeCost	-90000	usd
CY2023Q3	aat	Lease Income Cost LeaseIncomeCost	46000	usd
	aat	Lease Income Cost LeaseIncomeCost	-198000	usd
	aat	Lease Income Cost LeaseIncomeCost	-138000	usd
CY2024Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y9M18D
CY2024Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0319
	us-gaap	Operating Lease Payments OperatingLeasePayments	2559000	usd
	us-gaap	Operating Lease Payments OperatingLeasePayments	2484000	usd
CY2024Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	845000	usd
CY2024Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	970000	usd
CY2023Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	932000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	2756000	usd
CY2023Q3	us-gaap	Sublease Income SubleaseIncome	978000	usd
	us-gaap	Sublease Income SubleaseIncome	2558000	usd
	us-gaap	Sublease Income SubleaseIncome	2648000	usd
CY2024Q3	aat	Lease Income Cost LeaseIncomeCost	-90000	usd
CY2023Q3	aat	Lease Income Cost LeaseIncomeCost	46000	usd
	aat	Lease Income Cost LeaseIncomeCost	-198000	usd
	aat	Lease Income Cost LeaseIncomeCost	-138000	usd
CY2024Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y9M18D
CY2024Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0319
	us-gaap	Operating Lease Payments OperatingLeasePayments	2559000	usd
	us-gaap	Operating Lease Payments OperatingLeasePayments	2484000	usd
CY2024Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	845000	usd
CY2023Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	905000	usd
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	2186000	usd
CY2024Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11446000	usd
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	32818000	usd
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	32402000	usd
CY2023Q3	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	657000	usd
CY2024Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	105549000	usd
CY2023Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	105494000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	315664000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	312105000	usd
CY2024Q3	us-gaap	Straight Line Rent StraightLineRent	400000	usd
CY2023Q3	us-gaap	Straight Line Rent StraightLineRent	400000	usd
	us-gaap	Straight Line Rent StraightLineRent	3000000.0	usd
	us-gaap	Straight Line Rent StraightLineRent	3600000	usd
CY2024Q3	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	600000	usd
CY2023Q3	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	800000	usd
	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	2100000	usd
	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	2300000	usd
CY2024Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	845000	usd
CY2023Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	905000	usd
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	2186000	usd
CY2023Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11893000	usd
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	32818000	usd
CY2023Q3	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	657000	usd
	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	1960000	usd
CY2023Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	105494000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	315664000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	312105000	usd
CY2024Q3	us-gaap	Straight Line Rent StraightLineRent	400000	usd
CY2023Q3	us-gaap	Straight Line Rent StraightLineRent	400000	usd
	us-gaap	Straight Line Rent StraightLineRent	3000000.0	usd
	us-gaap	Straight Line Rent StraightLineRent	3600000	usd
CY2024Q3	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	600000	usd
CY2023Q3	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	800000	usd
	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	2100000	usd
	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	2300000	usd
CY2024Q3	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	14355000	usd
CY2023Q3	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	13428000	usd
	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	41522000	usd
	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	38779000	usd
CY2024Q3	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	7799000	usd
CY2023Q3	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	7675000	usd
	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	22553000	usd
CY2024Q3	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	5974000	usd
CY2023Q3	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	5652000	usd
	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	16805000	usd
	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	16298000	usd
CY2024Q3	us-gaap	Marketing Expense MarketingExpense	504000	usd
CY2023Q3	us-gaap	Marketing Expense MarketingExpense	491000	usd
	us-gaap	Marketing Expense MarketingExpense	2144000	usd
	us-gaap	Marketing Expense MarketingExpense	1568000	usd
CY2024Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	925000	usd
	us-gaap	Operating Lease Expense OperatingLeaseExpense	2619000	usd
	us-gaap	Operating Lease Expense OperatingLeaseExpense	2651000	usd
CY2024Q3	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	1164000	usd
CY2023Q3	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	1147000	usd
	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	3239000	usd
	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	3134000	usd
CY2024Q3	us-gaap	Management Fee Expense ManagementFeeExpense	640000	usd
CY2023Q3	us-gaap	Management Fee Expense ManagementFeeExpense	634000	usd
	us-gaap	Management Fee Expense ManagementFeeExpense	1825000	usd
	us-gaap	Management Fee Expense ManagementFeeExpense	1763000	usd
CY2024Q3	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	31361000	usd
CY2023Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	905000	usd
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	2186000	usd
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	2065000	usd
CY2024Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11446000	usd
CY2023Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11893000	usd
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	32818000	usd
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	32402000	usd
CY2024Q3	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	648000	usd
	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	1982000	usd
CY2024Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	105549000	usd
CY2023Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	105494000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	315664000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	312105000	usd
CY2024Q3	us-gaap	Straight Line Rent StraightLineRent	400000	usd
CY2023Q3	us-gaap	Straight Line Rent StraightLineRent	400000	usd
	us-gaap	Straight Line Rent StraightLineRent	3000000.0	usd
	us-gaap	Straight Line Rent StraightLineRent	3600000	usd
CY2024Q3	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	600000	usd
CY2023Q3	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	800000	usd
	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	2100000	usd
	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	2300000	usd
CY2023Q3	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	13428000	usd
	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	41522000	usd
CY2024Q3	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	7799000	usd
CY2023Q3	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	7675000	usd
CY2024Q3	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	5974000	usd
CY2023Q3	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	5652000	usd
	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	16805000	usd
CY2024Q3	us-gaap	Marketing Expense MarketingExpense	504000	usd
CY2023Q3	us-gaap	Marketing Expense MarketingExpense	491000	usd
	us-gaap	Marketing Expense MarketingExpense	2144000	usd
	us-gaap	Marketing Expense MarketingExpense	1568000	usd
CY2024Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	925000	usd
CY2023Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	885000	usd
	us-gaap	Operating Lease Expense OperatingLeaseExpense	2619000	usd
	us-gaap	Operating Lease Expense OperatingLeaseExpense	2651000	usd
CY2024Q3	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	1164000	usd
CY2023Q3	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	1147000	usd
	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	3239000	usd
	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	3134000	usd
CY2024Q3	us-gaap	Management Fee Expense ManagementFeeExpense	640000	usd
CY2023Q3	us-gaap	Management Fee Expense ManagementFeeExpense	634000	usd
	us-gaap	Management Fee Expense ManagementFeeExpense	1763000	usd
CY2024Q3	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	31361000	usd
CY2023Q3	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	29912000	usd
CY2023Q3	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	657000	usd
	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	1982000	usd
CY2023Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	105494000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	315664000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	312105000	usd
CY2024Q3	us-gaap	Straight Line Rent StraightLineRent	400000	usd
CY2023Q3	us-gaap	Straight Line Rent StraightLineRent	400000	usd
	us-gaap	Straight Line Rent StraightLineRent	3000000.0	usd
	us-gaap	Straight Line Rent StraightLineRent	3600000	usd
CY2024Q3	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	600000	usd
CY2023Q3	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	800000	usd
	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	2100000	usd
	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	2300000	usd
CY2024Q3	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	14355000	usd
CY2023Q3	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	13428000	usd
	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	41522000	usd
CY2024Q3	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	7799000	usd
CY2023Q3	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	7675000	usd
	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	22553000	usd
	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	21935000	usd
	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	16805000	usd
	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	16298000	usd
CY2024Q3	us-gaap	Marketing Expense MarketingExpense	504000	usd
CY2023Q3	us-gaap	Marketing Expense MarketingExpense	491000	usd
	us-gaap	Marketing Expense MarketingExpense	2144000	usd
	us-gaap	Marketing Expense MarketingExpense	1568000	usd
CY2024Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	925000	usd
CY2023Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	885000	usd
	us-gaap	Operating Lease Expense OperatingLeaseExpense	2619000	usd
	us-gaap	Operating Lease Expense OperatingLeaseExpense	2651000	usd
CY2024Q3	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	1164000	usd
CY2023Q3	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	1147000	usd
	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	3239000	usd
	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	3134000	usd
CY2024Q3	us-gaap	Management Fee Expense ManagementFeeExpense	640000	usd
CY2023Q3	us-gaap	Management Fee Expense ManagementFeeExpense	634000	usd
	us-gaap	Management Fee Expense ManagementFeeExpense	1825000	usd
	us-gaap	Management Fee Expense ManagementFeeExpense	1763000	usd
CY2024Q3	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	31361000	usd
CY2023Q3	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	29912000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	90707000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	86128000	usd
CY2024Q3	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	14355000	usd
	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	38779000	usd
CY2024Q3	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	7799000	usd
CY2023Q3	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	7675000	usd
	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	22553000	usd
	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	21935000	usd
CY2024Q3	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	5974000	usd
CY2023Q3	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	5652000	usd
	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	16298000	usd
CY2024Q3	us-gaap	Marketing Expense MarketingExpense	504000	usd
CY2023Q3	us-gaap	Marketing Expense MarketingExpense	491000	usd
	us-gaap	Marketing Expense MarketingExpense	2144000	usd
CY2024Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	925000	usd
CY2023Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	885000	usd
	us-gaap	Operating Lease Expense OperatingLeaseExpense	2619000	usd
CY2024Q3	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	1164000	usd
CY2023Q3	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	1147000	usd
	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	3239000	usd
	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	3134000	usd
CY2024Q3	us-gaap	Management Fee Expense ManagementFeeExpense	640000	usd
CY2023Q3	us-gaap	Management Fee Expense ManagementFeeExpense	634000	usd
	us-gaap	Management Fee Expense ManagementFeeExpense	1825000	usd
	us-gaap	Management Fee Expense ManagementFeeExpense	1763000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	90707000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	86128000	usd
CY2024Q3	us-gaap	Interest And Other Income InterestAndOtherIncome	1972000	usd
CY2023Q3	us-gaap	Interest And Other Income InterestAndOtherIncome	614000	usd
CY2023Q3	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	29912000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	90707000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	86128000	usd
CY2024Q3	us-gaap	Interest And Other Income InterestAndOtherIncome	1972000	usd
CY2023Q3	us-gaap	Interest And Other Income InterestAndOtherIncome	614000	usd
	us-gaap	Interest And Other Income InterestAndOtherIncome	3551000	usd
	us-gaap	Interest And Other Income InterestAndOtherIncome	1507000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	235000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	293000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	750000	usd
CY2024Q3	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	2000	usd
CY2023Q3	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	0	usd
	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	10002000	usd
	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	6515000	usd
CY2024Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1739000	usd
CY2023Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	321000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	12857000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7272000	usd
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	segment
CY2024Q3	aat	Number Of Rooms In Mixed Use Segment All Suite Hotel NumberOfRoomsInMixedUseSegmentAllSuiteHotel	369	room
CY2024Q3	us-gaap	Gross Profit GrossProfit	80405000	usd
CY2023Q3	us-gaap	Gross Profit GrossProfit	69887000	usd
	us-gaap	Gross Profit GrossProfit	220555000	usd
	us-gaap	Gross Profit GrossProfit	208428000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	86128000	usd
CY2024Q3	us-gaap	Interest And Other Income InterestAndOtherIncome	1972000	usd
CY2023Q3	us-gaap	Interest And Other Income InterestAndOtherIncome	614000	usd
	us-gaap	Interest And Other Income InterestAndOtherIncome	3551000	usd
	us-gaap	Interest And Other Income InterestAndOtherIncome	1507000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	235000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	293000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	696000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	750000	usd
CY2024Q3	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	2000	usd
CY2023Q3	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	0	usd
	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	10002000	usd
	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	6515000	usd
CY2024Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1739000	usd
CY2023Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	321000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	12857000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7272000	usd
CY2024Q3	aat	Number Of Rooms In Mixed Use Segment All Suite Hotel NumberOfRoomsInMixedUseSegmentAllSuiteHotel	369	room
CY2024Q3	us-gaap	Gross Profit GrossProfit	80405000	usd
CY2023Q3	us-gaap	Gross Profit GrossProfit	69887000	usd
	us-gaap	Gross Profit GrossProfit	220555000	usd
	us-gaap	Gross Profit GrossProfit	208428000	usd
CY2024Q3	us-gaap	Interest And Other Income InterestAndOtherIncome	1972000	usd
	us-gaap	Interest And Other Income InterestAndOtherIncome	3551000	usd
	us-gaap	Interest And Other Income InterestAndOtherIncome	1507000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	235000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	696000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	750000	usd
CY2024Q3	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	2000	usd
CY2023Q3	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	0	usd
	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	10002000	usd
	aat	Other Non Operating Income Expense Other OtherNonOperatingIncomeExpenseOther	6515000	usd
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Files In Submission

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American Assets Trust, Inc. Stock $aat

2024 Q4 Form 10-Q Financial Statement

#000150021724000053 Filed on November 01, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AAT American Assets Trust, Inc. Stock $aat

2024 Q4 Form 10-Q Financial Statement

#000150021724000053 Filed on November 01, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AAT
American Assets Trust, Inc. Stock $aat