$AAT
American Assets Trust, Inc. Stock $aat

$aat Overview Financials Valuation SEC Filings Company Website

2022 Q4 Form 10-Q Financial Statement

#000150021722000125 Filed on October 28, 2022

Income Statement

Concept	2022 Q4	2022 Q3	2021 Q3
Revenue	$106.0M	$111.0M	$98.29M
YoY Change	4.18%	12.96%	16.49%
Cost Of Revenue	$39.80M	$39.92M	$33.11M
YoY Change	9.81%	20.55%	7.85%
Gross Profit	$66.20M	$71.11M	$65.18M
YoY Change	1.06%	9.1%	21.43%
Gross Profit Margin	62.45%	64.05%	66.31%
Selling, General & Admin	$9.013M	$8.865M	$7.297M
YoY Change	-3.14%	21.49%	5.2%
% of Gross Profit	13.62%	12.47%	11.2%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$30.11M	$31.73M	$30.68M
YoY Change	-1.21%	3.42%	14.05%
% of Gross Profit	45.49%	44.62%	47.07%
Operating Expenses	$39.12M	$8.865M	$7.297M
YoY Change	-1.66%	21.49%	-88.61%
Operating Profit	$27.07M	$31.00M	$27.67M
YoY Change	5.28%	12.05%	36.15%
Interest Expense	-$14.46M	$14.45M	$14.72M
YoY Change	-3.27%	-1.82%	10.68%
% of Operating Profit	-53.4%	46.62%	53.21%
Other Income/Expense, Net	-$210.0K	-$180.0K	-$52.00K
YoY Change	-27.84%	246.15%	-90.21%
Pretax Income	$12.41M	$16.37M	$12.90M
YoY Change	18.4%	26.94%	98.69%
Income Tax		$240.0K	$150.0K
% Of Pretax Income		1.47%	1.16%
Net Earnings	$9.629M	$16.37M	$10.04M
YoY Change	18.34%	63.02%	99.31%
Net Earnings / Revenue	9.08%	14.74%	10.22%
Basic Earnings Per Share	$0.16	$0.21	$0.17
Diluted Earnings Per Share	$0.16	$0.21	$0.17
COMMON SHARES
Basic Shares Outstanding	60.53M shares	60.53M shares	59.99M shares
Diluted Shares Outstanding		76.23M shares	76.17M shares

Balance Sheet

Concept	2022 Q4	2022 Q3	2021 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$49.57M	$63.43M	$171.9M
YoY Change	-64.47%	-63.1%	10.7%
Cash & Equivalents	$49.57M	$63.43M	$171.9M
Short-Term Investments
Other Short-Term Assets	$9.277M	$9.633M	$8.795M
YoY Change	1.54%	9.53%	29.34%
Inventory
Prepaid Expenses
Receivables	$7.848M	$8.566M	$7.421M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$66.70M	$81.63M	$188.1M
YoY Change	-57.27%	-56.61%	8.06%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.758B	$2.736B	$2.708B
YoY Change	1.86%	1.03%	7.08%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets			$2.259M
YoY Change			88.25%
Total Long-Term Assets	$2.921B	$2.927B	$2.863B
YoY Change	2.07%	2.24%	7.23%
TOTAL ASSETS
Total Short-Term Assets	$66.70M	$81.63M	$188.1M
Total Long-Term Assets	$2.921B	$2.927B	$2.863B
Total Assets	$2.988B	$3.009B	$3.051B
YoY Change	-1.0%	-1.39%	7.28%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$65.99M	$72.36M	$88.85M
YoY Change	2.26%	-18.57%	23.75%
Accrued Expenses	$25.68M	$26.26M	$28.46M
YoY Change	-8.03%	-7.72%	-7.01%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$100.4M	$107.4M	$125.3M
YoY Change	0.06%	-14.26%	15.06%
LONG-TERM LIABILITIES
Long-Term Debt	$1.648B	$1.647B	$1.649B
YoY Change	-0.07%	-0.08%	17.22%
Other Long-Term Liabilities	$53.05M	$82.24M	$57.78M
YoY Change	-7.47%	42.34%	-6.96%
Total Long-Term Liabilities	$1.701B	$1.730B	$1.707B
YoY Change	-0.32%	1.36%	16.2%
TOTAL LIABILITIES
Total Short-Term Liabilities	$100.4M	$107.4M	$125.3M
Total Long-Term Liabilities	$1.701B	$1.730B	$1.707B
Total Liabilities	$1.802B	$1.811B	$1.832B
YoY Change	-0.3%	-1.17%	16.11%
SHAREHOLDERS EQUITY
Retained Earnings	-$251.2M	-$241.5M	-$207.9M
YoY Change	15.33%	16.18%	26.42%
Common Stock	$1.462B	$1.459B	$1.451B
YoY Change	0.55%	0.6%	0.44%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.221B	$1.230B	$1.245B
YoY Change
Total Liabilities & Shareholders Equity	$2.988B	$3.009B	$3.051B
YoY Change	-1.0%	-1.39%	7.28%

Cashflow Statement

Concept	2022 Q4	2022 Q3	2021 Q3
OPERATING ACTIVITIES
Net Income	$9.629M	$16.37M	$10.04M
YoY Change	18.34%	63.02%	99.31%
Depreciation, Depletion And Amortization	$30.11M	$31.73M	$30.68M
YoY Change	-1.21%	3.42%	14.05%
Cash From Operating Activities	$38.18M	$54.83M	$52.91M
YoY Change	-1.34%	3.65%	32.27%
INVESTING ACTIVITIES
Capital Expenditures	$25.47M	-$25.25M	-$225.8M
YoY Change	-153.26%	-88.81%	1572.27%
Acquisitions
YoY Change
Other Investing Activities	-$1.221M	-$1.901M	-$497.0K
YoY Change	9.31%	282.49%	-50.3%
Cash From Investing Activities	-$26.69M	-$27.15M	-$226.3M
YoY Change	-45.46%	-88.0%	1460.37%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-25.35M	-25.00M	-23.00M
YoY Change	6.17%	8.71%	20.39%
NET CHANGE
Cash From Operating Activities	38.18M	54.83M	52.91M
Cash From Investing Activities	-26.69M	-27.15M	-226.3M
Cash From Financing Activities	-25.35M	-25.00M	-23.00M
Net Change In Cash	-13.86M	2.681M	-196.3M
YoY Change	-59.37%	-101.37%	-3167.86%
FREE CASH FLOW
Cash From Operating Activities	$38.18M	$54.83M	$52.91M
Capital Expenditures	$25.47M	-$25.25M	-$225.8M
Free Cash Flow	$12.71M	$80.09M	$278.7M
YoY Change	-85.3%	-71.26%	420.87%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
	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 Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2022-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity Registrant Name EntityRegistrantName	AMERICAN ASSETS TRUST, INC.
	dei	Entity File Number EntityFileNumber	001-35030
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	27-3338708
	dei	Entity Address Address Line1 EntityAddressAddressLine1	3420 Carmel Mountain Road
	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
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	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
	dei	Trading Symbol TradingSymbol	AAT
	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2022Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	60528115	shares
CY2022Q3	us-gaap	Rental Properties RentalProperties	3450995000	usd
CY2021Q4	us-gaap	Rental Properties RentalProperties	3389726000	usd
CY2022Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	194798000	usd
CY2021Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	139098000	usd
CY2022Q3	us-gaap	Land Available For Development LandAvailableForDevelopment	547000	usd
CY2021Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	547000	usd
CY2022Q3	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	3646340000	usd
CY2021Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	3529371000	usd
CY2022Q3	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	910556000	usd
CY2021Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	847390000	usd
CY2022Q3	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	2735784000	usd
CY2021Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	2681981000	usd
CY2022Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	63431000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	139524000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	139524000	usd
CY2022Q3	us-gaap	Accounts Receivable Net AccountsReceivableNet	8566000	usd
CY2021Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	7445000	usd
CY2022Q3	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	88375000	usd
CY2021Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	82724000	usd
CY2022Q3	us-gaap	Other Assets OtherAssets	112421000	usd
CY2021Q4	us-gaap	Other Assets OtherAssets	106253000	usd
CY2022Q3	us-gaap	Assets Assets	3008577000	usd
CY2021Q4	us-gaap	Assets Assets	3017927000	usd
CY2022Q3	us-gaap	Secured Debt SecuredDebt	74555000	usd
CY2021Q4	us-gaap	Secured Debt SecuredDebt	110965000	usd
CY2022Q3	us-gaap	Unsecured Debt UnsecuredDebt	1538986000	usd
CY2021Q4	us-gaap	Unsecured Debt UnsecuredDebt	1538238000	usd
CY2022Q3	us-gaap	Line Of Credit LineOfCredit	33895000	usd
CY2021Q4	us-gaap	Line Of Credit LineOfCredit	0	usd
CY2022Q3	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	72355000	usd
CY2021Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	64531000	usd
CY2022Q3	us-gaap	Security Deposit Liability SecurityDepositLiability	8821000	usd
CY2021Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	7855000	usd
CY2022Q3	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	82242000	usd
CY2021Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	86215000	usd
CY2022Q3	us-gaap	Liabilities Liabilities	1810854000	usd
CY2021Q4	us-gaap	Liabilities Liabilities	1807804000	usd
CY2022Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	490000000	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	490000000	shares
CY2022Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	60528115	shares
CY2022Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	60528115	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	60525580	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	60525580	shares
CY2022Q3	us-gaap	Common Stock Value CommonStockValue	605000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	605000	usd
CY2022Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1458748000	usd
CY2021Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1453272000	usd
CY2022Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-241549000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-217785000	usd
CY2022Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	12554000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	2872000	usd
CY2022Q3	us-gaap	Stockholders Equity StockholdersEquity	1230358000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1238964000	usd
CY2022Q3	us-gaap	Minority Interest MinorityInterest	-32635000	usd
CY2021Q4	us-gaap	Minority Interest MinorityInterest	-28841000	usd
CY2022Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1197723000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1210123000	usd
CY2022Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3008577000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3017927000	usd
CY2022Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	105468000	usd
CY2021Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	93804000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	301470000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	262573000	usd
CY2022Q3	us-gaap	Other Operating Income OtherOperatingIncome	5555000	usd
CY2021Q3	us-gaap	Other Operating Income OtherOperatingIncome	4482000	usd
	us-gaap	Other Operating Income OtherOperatingIncome	15178000	usd
	us-gaap	Other Operating Income OtherOperatingIncome	11508000	usd
CY2022Q3	us-gaap	Revenues Revenues	111023000	usd
CY2021Q3	us-gaap	Revenues Revenues	98286000	usd
	us-gaap	Revenues Revenues	316648000	usd
	us-gaap	Revenues Revenues	274081000	usd
CY2022Q3	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	28438000	usd
CY2021Q3	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	23466000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	78436000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	61916000	usd
CY2022Q3	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	11477000	usd
CY2021Q3	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	9644000	usd
	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	34193000	usd
	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	31610000	usd
CY2022Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	8376000	usd
CY2021Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	6827000	usd
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	23130000	usd
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	20574000	usd
CY2022Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	31729000	usd
CY2021Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	30680000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	93228000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	85827000	usd
CY2022Q3	us-gaap	Costs And Expenses CostsAndExpenses	80020000	usd
CY2021Q3	us-gaap	Costs And Expenses CostsAndExpenses	70617000	usd
	us-gaap	Costs And Expenses CostsAndExpenses	228987000	usd
	us-gaap	Costs And Expenses CostsAndExpenses	199927000	usd
CY2022Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	31003000	usd
CY2021Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	27669000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	87661000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	74154000	usd
CY2022Q3	us-gaap	Interest Expense InterestExpense	14454000	usd
CY2021Q3	us-gaap	Interest Expense InterestExpense	14722000	usd
	us-gaap	Interest Expense InterestExpense	43667000	usd
	us-gaap	Interest Expense InterestExpense	43589000	usd
CY2022Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2021Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4271000	usd
CY2022Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-180000	usd
CY2021Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-52000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-523000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-179000	usd
CY2022Q3	us-gaap	Profit Loss ProfitLoss	16369000	usd
CY2021Q3	us-gaap	Profit Loss ProfitLoss	12895000	usd
	us-gaap	Profit Loss ProfitLoss	43471000	usd
	us-gaap	Profit Loss ProfitLoss	26115000	usd
CY2022Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	155000	usd
CY2021Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	145000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	464000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	417000	usd
CY2022Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	3442000	usd
CY2021Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	2709000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	9130000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	5459000	usd
CY2022Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	12772000	usd
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	10041000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	33877000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	20239000	usd
CY2022Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.21
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.17
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2022Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60044117	shares
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	59990343	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60041034	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	59986844	shares
CY2022Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.17
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.34
CY2022Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76225654	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76171880	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76222571	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76168381	shares
CY2022Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.32
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.30
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.96
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.86
CY2022Q3	us-gaap	Profit Loss ProfitLoss	16369000	usd
CY2021Q3	us-gaap	Profit Loss ProfitLoss	12895000	usd
	us-gaap	Profit Loss ProfitLoss	43471000	usd
	us-gaap	Profit Loss ProfitLoss	26115000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	4207000	usd
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	435000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	13117000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	1657000	usd
CY2022Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	20301000	usd
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	13056000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	55763000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	26755000	usd
CY2022Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	4277000	usd
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	2744000	usd
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	11739000	usd
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	5604000	usd
CY2022Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	16024000	usd
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	10312000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	44024000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	21151000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1210123000	usd
CY2022Q1	us-gaap	Profit Loss ProfitLoss	13514000	usd
CY2022Q1	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	24545000	usd
CY2022Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1489000	usd
CY2022Q1	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	15000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	5596000	usd
CY2022Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1205887000	usd
CY2022Q2	us-gaap	Profit Loss ProfitLoss	13588000	usd
CY2022Q2	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	24547000	usd
CY2022Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2001000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	3314000	usd
CY2022Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1199968000	usd
CY2022Q3	us-gaap	Profit Loss ProfitLoss	16369000	usd
CY2022Q3	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	24547000	usd
CY2022Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2001000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	4207000	usd
CY2022Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1197723000	usd
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1253406000	usd
CY2021Q1	us-gaap	Profit Loss ProfitLoss	1733000	usd
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	21463000	usd
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1484000	usd
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	747000	usd
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1235439000	usd
CY2021Q2	us-gaap	Profit Loss ProfitLoss	11487000	usd
CY2021Q2	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	21464000	usd
CY2021Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1484000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	475000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	275000	usd
CY2021Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1227146000	usd
CY2021Q3	us-gaap	Profit Loss ProfitLoss	12895000	usd
CY2021Q3	us-gaap	Adjustments To Additional Paid In Capital Dividends In Excess Of Retained Earnings AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings	22995000	usd
CY2021Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1484000	usd
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	435000	usd
CY2021Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1218691000	usd
	us-gaap	Profit Loss ProfitLoss	43471000	usd
	us-gaap	Profit Loss ProfitLoss	26115000	usd
	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-8766000	usd
	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-13536000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	93228000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	85827000	usd
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1930000	usd
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1734000	usd
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4271000	usd
	us-gaap	Provision For Lease Losses ProvisionForLeaseLosses	-31000	usd
	us-gaap	Provision For Lease Losses ProvisionForLeaseLosses	-934000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	5491000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	4452000	usd
	aat	Unearned Rent UnearnedRent	825000	usd
	aat	Unearned Rent UnearnedRent	824000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-684000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	927000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1072000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-941000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1115000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-225000	usd
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	5753000	usd
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	20589000	usd
	aat	Increase Decrease In Security Deposits Payable IncreaseDecreaseInSecurityDepositsPayable	777000	usd
	aat	Increase Decrease In Security Deposits Payable IncreaseDecreaseInSecurityDepositsPayable	584000	usd
	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	1367000	usd
	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	1115000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	140892000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	129632000	usd
	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	45167000	usd
	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	204511000	usd
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	88314000	usd
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	56772000	usd
	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	6153000	usd
	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	2025000	usd
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	usd
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	47760000	usd
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	0	usd
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	47723000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-139634000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-263345000	usd
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	75000000	usd
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	usd
	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	111000000	usd
	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	0	usd
	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	36000000	usd
	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	0	usd
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	usd
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	100000000	usd
	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	0	usd
	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	494675000	usd
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	usd
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	155375000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3697000	usd
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	5075000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	73639000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	65922000	usd
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	15000	usd
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-77351000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	168303000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-76093000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	34590000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	139524000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	139049000	usd
CY2022Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	63431000	usd
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	173639000	usd
CY2022Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	63431000	usd
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	171923000	usd
CY2022Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0	usd
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1716000	usd
CY2022Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	63431000	usd
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	173639000	usd
CY2022Q3	dei	Entity Number Of Employees EntityNumberOfEmployees	212	employee
CY2022Q3	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	31	property
CY2022Q3	aat	Real Estate Properties Held For Development RealEstatePropertiesHeldForDevelopment	3	property
	us-gaap	Interest Costs Incurred InterestCostsIncurred	47792000	usd
	us-gaap	Interest Costs Incurred InterestCostsIncurred	45618000	usd
	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	4125000	usd
	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2029000	usd
	us-gaap	Interest Expense InterestExpense	43667000	usd
	us-gaap	Interest Expense InterestExpense	43589000	usd
	us-gaap	Interest Paid Net InterestPaidNet	48145000	usd
	us-gaap	Interest Paid Net InterestPaidNet	42311000	usd
	us-gaap	Income Taxes Paid IncomeTaxesPaid	638000	usd
	us-gaap	Income Taxes Paid IncomeTaxesPaid	289000	usd
	aat	Increase Decrease Accrued Construction In Progress IncreaseDecreaseAccruedConstructionInProgress	20750000	usd
	aat	Increase Decrease Accrued Construction In Progress IncreaseDecreaseAccruedConstructionInProgress	10119000	usd
	aat	Increase Decrease Accrued Leasing Commissions IncreaseDecreaseAccruedLeasingCommissions	1897000	usd
	aat	Increase Decrease Accrued Leasing Commissions IncreaseDecreaseAccruedLeasingCommissions	1072000	usd
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	segment
CY2022Q3	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><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%">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. The provision for doubtful accounts at September 30, 2022 and December 31, 2021 was approximately $2.8 million and $4.6 million, respectively.</span></div><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%">Rent Concessions – COVID-19</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%">From 2020 through 2022, we provided lease concessions to certain tenants, primarily within the retail segment, as a result of the COVID-19 pandemic, in the form of rent deferrals and abatements. These lease concessions generally included an increase in our rights as a lessor. We assess each lease concession and determine whether it represents a lease modifications under Accounting Standards Codification Topic 842, Leases ("ASC 842"). During the third quarter of 2022, we provided an immaterial amount of lease concessions to certain tenants that were previously impacted by and/or continued being impacted by the COVID-19 pandemic.</span></div>
CY2022Q3	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	2800000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	4600000	usd
CY2022Q3	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	52832000	usd
CY2021Q4	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	58655000	usd
CY2022Q3	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	32347000	usd
CY2021Q4	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	36253000	usd
CY2022Q3	us-gaap	Below Market Lease Net BelowMarketLeaseNet	20485000	usd
CY2021Q4	us-gaap	Below Market Lease Net BelowMarketLeaseNet	22402000	usd
CY2022Q3	us-gaap	Derivative Assets DerivativeAssets	11310000	usd
	us-gaap	Derivatives Methods Of Accounting Hedging Derivatives DerivativesMethodsOfAccountingHedgingDerivatives	The effective portion of changes in the fair value of the derivatives that are designated as cash flow hedges are being recorded in accumulated other comprehensive income and will be subsequently reclassified into earnings during the period in which the hedged forecasted transaction affects earnings for as long as hedged cash flows remain probable. During the next twelve months, we estimate the cash flow hedges in place will reduce interest expense by approximately $1.1 million.The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of the derivative. This analysis reflects the contractual terms of the derivative, including the period to maturity and, counterparty credit risk and uses observable market-based inputs, including interest rate curves, and implied volatilities. The fair value of the interest rate swap is determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves.
	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	1100000	usd
CY2022Q3	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	41197000	usd
CY2021Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	40595000	usd
CY2022Q3	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	38590000	usd
CY2021Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	38589000	usd
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	0	usd
CY2022Q3	aat	Finite Lived Intangible Asset Off Market Lease Favorable Net FiniteLivedIntangibleAssetOffMarketLeaseFavorableNet	117000	usd
CY2021Q4	aat	Finite Lived Intangible Asset Off Market Lease Favorable Net FiniteLivedIntangibleAssetOffMarketLeaseFavorableNet	149000	usd
CY2022Q3	us-gaap	Finite Lived Intangible Asset Acquired In Place Leases FiniteLivedIntangibleAssetAcquiredInPlaceLeases	24903000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Asset Acquired In Place Leases FiniteLivedIntangibleAssetAcquiredInPlaceLeases	29085000	usd
CY2022Q3	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	979000	usd
CY2021Q4	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	913000	usd
CY2022Q3	us-gaap	Incentive To Lessee IncentiveToLessee	1097000	usd
CY2021Q4	us-gaap	Incentive To Lessee IncentiveToLessee	595000	usd
CY2022Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1456000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1382000	usd
CY2022Q3	us-gaap	Other Finite Lived Intangible Assets Gross OtherFiniteLivedIntangibleAssetsGross	2259000	usd
CY2021Q4	us-gaap	Other Finite Lived Intangible Assets Gross OtherFiniteLivedIntangibleAssetsGross	2445000	usd
CY2022Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	24512000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	26254000	usd
CY2022Q3	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	9633000	usd
CY2021Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	9136000	usd
CY2022Q3	us-gaap	Other Assets OtherAssets	112421000	usd
CY2021Q4	us-gaap	Other Assets OtherAssets	106253000	usd
CY2022Q3	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	20485000	usd
CY2021Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	22402000	usd
CY2022Q3	us-gaap	Deferred Revenue DeferredRevenue	18618000	usd
CY2021Q4	us-gaap	Deferred Revenue DeferredRevenue	16309000	usd
CY2022Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	0	usd
CY2021Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	1807000	usd
CY2022Q3	aat	Deferred Rent Expense And Lease Intangible DeferredRentExpenseAndLeaseIntangible	0	usd
CY2021Q4	aat	Deferred Rent Expense And Lease Intangible DeferredRentExpenseAndLeaseIntangible	3000	usd
CY2022Q3	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	2288000	usd
CY2021Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	2503000	usd
CY2022Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	967000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	967000	usd
CY2022Q3	aat	Deferred Rent Credits DeferredRentCredits	13559000	usd
CY2021Q4	aat	Deferred Rent Credits DeferredRentCredits	14274000	usd
CY2022Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	26257000	usd
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	27917000	usd
CY2022Q3	us-gaap	Other Liabilities OtherLiabilities	68000	usd
CY2021Q4	us-gaap	Other Liabilities OtherLiabilities	33000	usd
CY2022Q3	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	82242000	usd
CY2021Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	86215000	usd
CY2022Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.32
CY2022Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.32
CY2022Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.32
CY2021Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	145000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	464000	usd
CY2022Q3	us-gaap	Share Based Compensation ShareBasedCompensation	2000000	usd
CY2021Q3	us-gaap	Share Based Compensation ShareBasedCompensation	1500000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	5500000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	4500000	usd
CY2022Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	5200000	usd
CY2022Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	483110	shares
CY2021Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	481966	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	483895	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	485897	shares
CY2022Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	16369000	usd
CY2021Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	12895000	usd
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	43471000	usd
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	26115000	usd
CY2022Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	155000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	417000	usd
CY2022Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	3442000	usd
CY2021Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	2709000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	9130000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	5459000	usd
CY2022Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	12772000	usd
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	10041000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	33877000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	20239000	usd
CY2022Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	12772000	usd
CY2021Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	10041000	usd
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	33877000	usd
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	20239000	usd
CY2022Q3	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	3442000	usd
CY2021Q3	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	2709000	usd
	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	9130000	usd
	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships Diluted MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted	5459000	usd
CY2022Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	16214000	usd
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	12750000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	43007000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	25698000	usd
CY2022Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60044117	shares
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	59990343	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60041034	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	59986844	shares
CY2022Q3	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	16181537	shares
CY2021Q3	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
CY2022Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76225654	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76171880	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76222571	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76168381	shares
CY2022Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.21
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.17
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2022Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.17
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.34
CY2022Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1000000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1000000	usd
CY2022Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	200000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	600000	usd
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	200000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	500000	usd
	us-gaap	Loss On Contract Termination For Default LossOnContractTerminationForDefault	5400000	usd
	aat	Number Of Consolidated Properties NumberOfConsolidatedProperties	15	property
	aat	Years Minimum Term Range Of Office And Retail Leases YearsMinimumTermRangeOfOfficeAndRetailLeases	P3Y
	aat	Years Maximum Term Range Of Office And Retail Leases YearsMaximumTermRangeOfOfficeAndRetailLeases	P10Y
	aat	Months Minimum Term Of Apartment Leases MonthsMinimumTermOfApartmentLeases	P7M
	aat	Months Maximum Term Length Of Apartment Leases MonthsMaximumTermLengthOfApartmentLeases	P15M
	aat	Operating Leases Rental Period Terms OperatingLeasesRentalPeriodTerms	P12M
CY2022Q3	us-gaap	Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear	56119000	usd
CY2022Q3	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	245888000	usd
CY2022Q3	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	219526000	usd
CY2022Q3	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	195478000	usd
CY2022Q3	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	179796000	usd
CY2022Q3	aat	Lessor Operating Lease Payment To Be Received After Year Four LessorOperatingLeasePaymentToBeReceivedAfterYearFour	440435000	usd
CY2022Q3	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	1337242000	usd
	aat	Operating Leases Rental Period Terms OperatingLeasesRentalPeriodTerms	P12M
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	820000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	3328000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3428000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3531000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3584000	usd
CY2022Q3	aat	Lessee Operating Lease Liability To Be Paid After Year Four LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	16126000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	30817000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	4560000	usd
CY2022Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	26257000	usd
CY2022Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	844000	usd
CY2021Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	831000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	2533000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	3095000	usd
CY2022Q3	us-gaap	Sublease Income SubleaseIncome	968000	usd
CY2021Q3	us-gaap	Sublease Income SubleaseIncome	745000	usd
	us-gaap	Sublease Income SubleaseIncome	2675000	usd
	us-gaap	Sublease Income SubleaseIncome	2877000	usd
CY2022Q3	aat	Lease Income Cost LeaseIncomeCost	124000	usd
CY2021Q3	aat	Lease Income Cost LeaseIncomeCost	-86000	usd
	aat	Lease Income Cost LeaseIncomeCost	142000	usd
	aat	Lease Income Cost LeaseIncomeCost	-218000	usd
CY2022Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y9M18D
CY2022Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0319
	us-gaap	Operating Lease Payments OperatingLeasePayments	2412000	usd
	us-gaap	Operating Lease Payments OperatingLeasePayments	1996000	usd
CY2022Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	978000	usd
CY2021Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	969000	usd
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	2216000	usd
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	2593000	usd
CY2022Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11379000	usd
CY2021Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	8164000	usd
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	28848000	usd
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	17626000	usd
CY2022Q3	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	665000	usd
CY2021Q3	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	591000	usd
	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	1937000	usd
	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	1724000	usd
CY2022Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	105468000	usd
CY2021Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	93804000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	301470000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	262573000	usd
CY2022Q3	us-gaap	Straight Line Rent StraightLineRent	2500000	usd
CY2021Q3	us-gaap	Straight Line Rent StraightLineRent	3800000	usd
	us-gaap	Straight Line Rent StraightLineRent	6300000	usd
	us-gaap	Straight Line Rent StraightLineRent	10800000	usd
CY2022Q3	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	800000	usd
CY2021Q3	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	800000	usd
	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	2500000	usd
	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	2400000	usd
CY2021Q3	us-gaap	Marketing Expense MarketingExpense	470000	usd
CY2022Q3	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	12272000	usd
CY2021Q3	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	11014000	usd
	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	34795000	usd
	aat	Direct Costs Of Leased Property Lessor Expense DirectCostsOfLeasedPropertyLessorExpense	30165000	usd
CY2022Q3	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	7230000	usd
CY2021Q3	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	5429000	usd
	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	19352000	usd
	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	12287000	usd
CY2022Q3	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	5799000	usd
CY2021Q3	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	4492000	usd
	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	15868000	usd
	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	12263000	usd
CY2022Q3	us-gaap	Marketing Expense MarketingExpense	489000	usd
	us-gaap	Marketing Expense MarketingExpense	1477000	usd
	us-gaap	Marketing Expense MarketingExpense	1174000	usd
CY2022Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	815000	usd
CY2021Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	856000	usd
	us-gaap	Operating Lease Expense OperatingLeaseExpense	2405000	usd
	us-gaap	Operating Lease Expense OperatingLeaseExpense	3166000	usd
CY2022Q3	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	1231000	usd
CY2021Q3	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	794000	usd
	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	2963000	usd
	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	1960000	usd
CY2022Q3	us-gaap	Management Fee Expense ManagementFeeExpense	602000	usd
CY2021Q3	us-gaap	Management Fee Expense ManagementFeeExpense	411000	usd
	us-gaap	Management Fee Expense ManagementFeeExpense	1576000	usd
	us-gaap	Management Fee Expense ManagementFeeExpense	901000	usd
CY2022Q3	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	28438000	usd
CY2021Q3	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	23466000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	78436000	usd
	us-gaap	Cost Of Other Property Operating Expense CostOfOtherPropertyOperatingExpense	61916000	usd
CY2022Q3	us-gaap	Interest And Other Income InterestAndOtherIncome	60000	usd
CY2021Q3	us-gaap	Interest And Other Income InterestAndOtherIncome	98000	usd
	us-gaap	Interest And Other Income InterestAndOtherIncome	117000	usd
	us-gaap	Interest And Other Income InterestAndOtherIncome	272000	usd
CY2022Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	240000	usd
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	150000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	640000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	451000	usd
CY2022Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-180000	usd
CY2021Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-52000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-523000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-179000	usd
	aat	Percentage Of Investment In Related Party PercentageOfInvestmentInRelatedParty	0.477
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	segment
CY2022Q3	aat	Number Of Rooms In Mixed Use Segment All Suite Hotel NumberOfRoomsInMixedUseSegmentAllSuiteHotel	369	room
CY2022Q3	us-gaap	Gross Profit GrossProfit	71108000	usd
CY2021Q3	us-gaap	Gross Profit GrossProfit	65176000	usd
	us-gaap	Gross Profit GrossProfit	204019000	usd
	us-gaap	Gross Profit GrossProfit	180555000	usd
CY2022Q3	us-gaap	Gross Profit GrossProfit	71108000	usd
CY2021Q3	us-gaap	Gross Profit GrossProfit	65176000	usd
	us-gaap	Gross Profit GrossProfit	204019000	usd
	us-gaap	Gross Profit GrossProfit	180555000	usd
CY2022Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	8376000	usd
CY2021Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	6827000	usd
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	23130000	usd
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	20574000	usd
CY2022Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	31729000	usd
CY2021Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	30680000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	93228000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	85827000	usd
CY2022Q3	us-gaap	Interest Expense InterestExpense	14454000	usd
CY2021Q3	us-gaap	Interest Expense InterestExpense	14722000	usd
	us-gaap	Interest Expense InterestExpense	43667000	usd
	us-gaap	Interest Expense InterestExpense	43589000	usd
CY2022Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2021Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4271000	usd
CY2022Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-180000	usd
CY2021Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-52000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-523000	usd
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-179000	usd
CY2022Q3	us-gaap	Profit Loss ProfitLoss	16369000	usd
CY2021Q3	us-gaap	Profit Loss ProfitLoss	12895000	usd
	us-gaap	Profit Loss ProfitLoss	43471000	usd
	us-gaap	Profit Loss ProfitLoss	26115000	usd
CY2022Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	155000	usd
CY2021Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	145000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	464000	usd
	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	417000	usd
CY2022Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	3442000	usd
CY2021Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	2709000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	9130000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	5459000	usd
CY2022Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	12772000	usd
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	10041000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	33877000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	20239000	usd
CY2022Q3	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	2735784000	usd
CY2021Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	2681981000	usd
CY2022Q3	us-gaap	Notes Payable NotesPayable	75000000	usd
CY2021Q4	us-gaap	Notes Payable NotesPayable	111000000	usd
CY2022Q3	aat	Capital Expenditures And Leasing Commissions CapitalExpendituresAndLeasingCommissions	27155000	usd
CY2021Q3	aat	Capital Expenditures And Leasing Commissions CapitalExpendituresAndLeasingCommissions	21743000	usd
	aat	Capital Expenditures And Leasing Commissions CapitalExpendituresAndLeasingCommissions	94467000	usd
	aat	Capital Expenditures And Leasing Commissions CapitalExpendituresAndLeasingCommissions	58797000	usd

Files In Submission

Name	View Source	Status
0001500217-22-000125-index-headers.html	Edgar Link	pending
0001500217-22-000125-index.html	Edgar Link	pending
0001500217-22-000125.txt	Edgar Link	pending
0001500217-22-000125-xbrl.zip	Edgar Link	pending
aat-20220930.htm	Edgar Link	pending
aat-20220930.xsd	Edgar Link	pending
aat-20220930_g1.jpg	Edgar Link	pending
aat-ex311xq32022ng.htm	Edgar Link	pending
aat-ex312xq32022ng.htm	Edgar Link	pending
aat-ex313xq32022ng.htm	Edgar Link	pending
aat-ex314xq32022ng.htm	Edgar Link	pending
aat-ex321xq32022ng.htm	Edgar Link	pending
aat-ex322xq32022ng.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
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R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
aat-20220930_pre.xml	Edgar Link	unprocessable
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
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R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
aat-20220930_lab.xml	Edgar Link	unprocessable
aat-20220930_cal.xml	Edgar Link	unprocessable
aat-20220930_def.xml	Edgar Link	unprocessable
aat-20220930_htm.xml	Edgar Link	completed

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$AAT
American Assets Trust, Inc. Stock $aat

2022 Q4 Form 10-Q Financial Statement

#000150021722000125 Filed on October 28, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AAT American Assets Trust, Inc. Stock $aat

2022 Q4 Form 10-Q Financial Statement

#000150021722000125 Filed on October 28, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AAT
American Assets Trust, Inc. Stock $aat