$AAT
American Assets Trust, Inc. Stock $aat

$aat Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-K Financial Statement

#000119312513071652 Filed on February 22, 2013

Income Statement

Concept	2011 Q4	2011 Q3	2011 Q2
Revenue	$53.84M	$54.37M	$49.32M
YoY Change	60.47%	55.52%	82.12%
Cost Of Revenue	$21.27M	$19.66M	$19.77M
YoY Change	111.22%	108.7%	174.58%
Gross Profit	$32.57M	$31.30M	$31.33M
YoY Change	38.71%	22.55%	57.6%
Gross Profit Margin	60.5%	57.57%	63.53%
Selling, General & Admin	$3.090M	$3.480M	$3.870M
YoY Change	-19.95%	128.95%	113.81%
% of Gross Profit	9.49%	11.12%	12.35%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$14.00M	$15.80M	$13.90M
YoY Change	81.82%	31.67%	85.33%
% of Gross Profit	42.98%	50.48%	44.37%
Operating Expenses	$18.39M	$18.04M	$17.80M
YoY Change	36.22%	27.85%	104.83%
Operating Profit	$14.18M	$14.43M	$12.97M
YoY Change	42.1%	26.22%	15.9%
Interest Expense	-$14.24M	-$13.80M	-$13.27M
YoY Change	14.84%	6.73%	66.08%
% of Operating Profit	-100.41%	-95.65%	-102.32%
Other Income/Expense, Net	$610.0K	$150.0K	-$130.0K
YoY Change	-189.71%	-42.31%	-92.97%
Pretax Income	$560.0K	-$150.0K	-$10.00K
YoY Change	-118.06%	-87.9%	-100.18%
Income Tax	$0.00	$0.00	$0.00
% Of Pretax Income	0.0%
Net Earnings	$344.0K	$3.052M	$219.0K
YoY Change	-112.6%	3715.0%	-96.4%
Net Earnings / Revenue	0.64%	5.61%	0.44%
Basic Earnings Per Share
Diluted Earnings Per Share	$11.57K	$123.4K	$15.04K
COMMON SHARES
Basic Shares Outstanding		38.66M	38.66M
Diluted Shares Outstanding

Balance Sheet

Concept	2011 Q4	2011 Q3	2011 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$141.0M	$123.2M	$92.50M
YoY Change	235.61%	229.41%
Cash & Equivalents	$112.7M	$123.2M	$92.50M
Short-Term Investments	$28.24M
Other Short-Term Assets	$3.200M	$1.700M	$1.100M
YoY Change	-45.76%	-95.96%
Inventory
Prepaid Expenses
Receivables	$29.20M	$29.30M	$26.60M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$145.1M	$154.2M	$120.2M
YoY Change	110.29%	52.07%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.404B	$1.457B	$1.403B
YoY Change	53.06%	56.77%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$28.20M	$29.60M	$31.40M
YoY Change	-29.15%	-32.11%
Other Assets	$64.10M	$12.50M	$12.10M
YoY Change	87.98%	60.26%
Total Long-Term Assets	$1.564B	$1.571B	$1.603B
YoY Change	49.2%	56.7%
TOTAL ASSETS
Total Short-Term Assets	$145.1M	$154.2M	$120.2M
Total Long-Term Assets	$1.564B	$1.571B	$1.603B
Total Assets	$1.709B	$1.725B	$1.723B
YoY Change	52.97%	56.27%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$24.80M	$27.80M	$20.00M
YoY Change	119.47%	172.55%
Accrued Expenses
YoY Change
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	$28.90M	$32.50M	$24.30M
YoY Change	3.58%	21.27%
LONG-TERM LIABILITIES
Long-Term Debt	$912.1M	$943.9M	$944.3M
YoY Change	4.6%	5.94%
Other Long-Term Liabilities	$88.60M	$58.00M	$56.90M
YoY Change	41.99%	81.25%
Total Long-Term Liabilities	$1.001B	$1.002B	$1.001B
YoY Change	7.1%	8.55%
TOTAL LIABILITIES
Total Short-Term Liabilities	$28.90M	$32.50M	$24.30M
Total Long-Term Liabilities	$1.001B	$1.002B	$1.001B
Total Liabilities	$1.030B	$1.092B	$1.085B
YoY Change	3.42%	11.01%
SHAREHOLDERS EQUITY
Retained Earnings	-$28.01M
YoY Change
Common Stock	$654.0M
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$626.0M	$633.1M	$637.4M
YoY Change
Total Liabilities & Shareholders Equity	$1.709B	$1.725B	$1.723B
YoY Change	52.97%	56.27%

Cashflow Statement

Concept	2011 Q4	2011 Q3	2011 Q2
OPERATING ACTIVITIES
Net Income	$344.0K	$3.052M	$219.0K
YoY Change	-112.6%	3715.0%	-96.4%
Depreciation, Depletion And Amortization	$14.00M	$15.80M	$13.90M
YoY Change	81.82%	31.67%	85.33%
Cash From Operating Activities	$13.60M	$23.10M	$13.40M
YoY Change	27.1%	83.33%	-8.84%
INVESTING ACTIVITIES
Capital Expenditures	-$9.100M	-$10.30M	-$93.10M
YoY Change	-34.06%	930.0%	347.6%
Acquisitions
YoY Change
Other Investing Activities	-$1.700M	$31.10M	$900.0K
YoY Change	466.67%	-2492.31%	-91.26%
Cash From Investing Activities	-$10.80M	$20.80M	-$92.20M
YoY Change	-23.4%	-966.67%	786.54%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-13.30M	-13.20M	70.90M
YoY Change	-268.35%	200.0%	2263.33%
NET CHANGE
Cash From Operating Activities	13.60M	23.10M	13.40M
Cash From Investing Activities	-10.80M	20.80M	-92.20M
Cash From Financing Activities	-13.30M	-13.20M	70.90M
Net Change In Cash	-10.50M	30.70M	-7.900M
YoY Change	-333.33%	429.31%	-208.22%
FREE CASH FLOW
Cash From Operating Activities	$13.60M	$23.10M	$13.40M
Capital Expenditures	-$9.100M	-$10.30M	-$93.10M
Free Cash Flow	$22.70M	$33.40M	$106.5M
YoY Change	-7.35%	145.59%	200.0%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	1191446000
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	39664212	shares
CY2011Q1	aat	Maximum Maturities Of Securities MaximumMaturitiesOfSecurities	P30Y
CY2012Q1	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.0394	pure
CY2011Q4	us-gaap	Minority Interest MinorityInterest	53697000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Two Years OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears	132087000
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expense And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets	3011000
CY2012Q1	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	21900000
CY2012Q1	aat	Seven Year Non Recourse Mortgage Loan SevenYearNonRecourseMortgageLoan	P7Y
CY2012Q1	aat	Dividends Date Paid DividendsDatePaid	2012-03-30
CY2011Q2	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.0397	pure
CY2011Q2	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	84500000
CY2011Q3	us-gaap	Area Of Land AreaOfLand	16	acre
CY2012Q2	dei	Entity Public Float EntityPublicFloat	804000000
CY2012Q2	aat	Dividends Date Paid DividendsDatePaid	2012-06-29
CY2012Q3	aat	Share Based Compensation Arrangement By Share Based Payment Award Restricted Stock Granted To Directors ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockGrantedToDirectors	8015	shares
CY2011Q1	aat	Dividends Date Paid DividendsDatePaid	2011-03-31
CY2011Q2	aat	Dividends Date Paid DividendsDatePaid	2011-06-30
CY2011Q3	aat	Dividends Date Paid DividendsDatePaid	2011-09-30
CY2012Q3	aat	Maximum Secured Leverage Ratio On Revolving Credit Facility MaximumSecuredLeverageRatioOnRevolvingCreditFacility	0.55	pure
CY2012Q3	aat	Percent Of Secured Indebtedness PercentOfSecuredIndebtedness	0.55	pure
CY2012Q3	aat	Dividends Date Paid DividendsDatePaid	2012-09-28
CY2012Q4	us-gaap	Mortgage Loans On Real Estate Face Amount Of Mortgages MortgageLoansOnRealEstateFaceAmountOfMortgages	111000000
CY2009Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	194124
CY2009Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	968332
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	24189000
CY2009Q4	us-gaap	Common Stockholders Equity CommonStockholdersEquity	170963000
CY2010Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	221997
CY2010Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	1165097
CY2010Q4	us-gaap	Due From Affiliates DueFromAffiliates	21769000
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	41953000
CY2010Q4	us-gaap	Common Stockholders Equity CommonStockholdersEquity	155121000
CY2010Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	300000
CY2011Q1	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	0.25	pure
CY2011Q1	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	250000000
CY2011Q1	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	250000000
CY2011Q1	us-gaap	Notes Payable NotesPayable	342000000
CY2011Q1	us-gaap	Other Ownership Interests Units Issued OtherOwnershipInterestsUnitsIssued	18145039	shares
CY2011Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	31625000	shares
CY2011Q1	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	20.50
CY2011Q1	aat	Number Of Employees NumberOfEmployees	114	Employee
CY2011Q1	aat	Cash Paid To Non Accredited Prior Investors From Ipo CashPaidToNonAccreditedPriorInvestorsFromIpo	6100000
CY2011Q1	aat	Defeasance Costs DefeasanceCosts	24300000
CY2011Q1	aat	Net Proceeds From Ipo NetProceedsFromIpo	594600000
CY2011Q1	aat	Loan Transfer And Consent And Credit Facility Origination Fees Prepaid By Predecessor LoanTransferAndConsentAndCreditFacilityOriginationFeesPrepaidByPredecessor	700000
CY2011Q1	aat	Loan Transfer And Consent And Credit Facility Origination Fees LoanTransferAndConsentAndCreditFacilityOriginationFees	10800000
CY2011Q1	aat	Percentage Of Minimum Tangible Net Worth Covenant Of Credit Facility PercentageOfMinimumTangibleNetWorthCovenantOfCreditFacility	0.75	pure
CY2011Q1	aat	Ipo Offering Costs Paid By Predecessor IpoOfferingCostsPaidByPredecessor	1900000
CY2011Q1	aat	Shares Of Common Stock Issued To Accredited Prior Investors SharesOfCommonStockIssuedToAccreditedPriorInvestors	7030084	shares
CY2011Q1	aat	Properties Of Entities With Controlling Ownership Interests PropertiesOfEntitiesWithControllingOwnershipInterests	17	Property
CY2011Q1	aat	Percentage Of Net Proceeds Of Additional Equity Issuances Covenant Of Credit Facility PercentageOfNetProceedsOfAdditionalEquityIssuancesCovenantOfCreditFacility	0.85	pure
CY2011Q4	us-gaap	Other Liabilities OtherLiabilities	108000
CY2011Q1	aat	Other Ownership Interests Aggregate Value OtherOwnershipInterestsAggregateValue	516100000
CY2011Q1	aat	Properties Of Entities With Non Controlling Ownership Interests PropertiesOfEntitiesWithNonControllingOwnershipInterests	4	Property
CY2011Q4	aat	Dividends Date Paid DividendsDatePaid	2011-12-29
CY2011Q4	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Receivables BusinessAcquisitionPurchasePriceAllocationCurrentAssetsReceivables	153000
CY2011Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	234595
CY2011Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	1687276
CY2011Q4	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expense And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets	306000
CY2011Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	653645000
CY2011Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	4091000
CY2011Q4	us-gaap	Business Acquisition Purchase Price Allocation Land BusinessAcquisitionPurchasePriceAllocationLand	41204000
CY2011Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	433000
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	626031000
CY2011Q4	us-gaap	Other Finite Lived Intangible Assets Gross OtherFiniteLivedIntangibleAssetsGross	986000
CY2011Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	51821000
CY2011Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	3172000
CY2011Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2011Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	3495000
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	679728000
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	490000000	shares
CY2011Q4	us-gaap	Business Acquisition Purchase Price Allocation Buildings BusinessAcquisitionPurchasePriceAllocationBuildings	156112000
CY2011Q4	us-gaap	Secured Debt SecuredDebt	912067000
CY2011Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	15926000
CY2011Q4	us-gaap	Lease Incentive Receivable LeaseIncentiveReceivable	1850000
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	8978000
CY2011Q4	us-gaap	Business Acquisition Purchase Price Allocation Capital Lease Obligation Accrual BusinessAcquisitionPurchasePriceAllocationCapitalLeaseObligationAccrual	5701000
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	39283796	shares
CY2011Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	55579000
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1100000
CY2011Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	6810000
CY2011Q4	us-gaap	Business Acquisition Purchase Price Allocation Intangible Assets Other Than Goodwill BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsOtherThanGoodwill	22793000
CY2011Q4	us-gaap	Liabilities Liabilities	1029553000
CY2011Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	3280000
CY2011Q4	us-gaap	Rental Properties RentalProperties	1600643000
CY2011Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	13015000
CY2011Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	24300000
CY2011Q4	us-gaap	Business Acquisition Purchase Price Allocation Other Noncurrent Assets BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssets	723000
CY2011Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	48612000
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-28007000
CY2011Q4	us-gaap	Assets Assets	1709281000
CY2011Q4	us-gaap	Notes Payable NotesPayable	927993000
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1709281000
CY2011Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	74424000
CY2011Q4	us-gaap	Long Term Debt LongTermDebt	943479000
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	1403946000
CY2011Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	1628813000
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	112723000
CY2011Q4	us-gaap	Deposit Assets DepositAssets	3000000
CY2011Q4	us-gaap	Business Acquisition Purchase Price Allocation Current Liabilities Accounts Payable BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesAccountsPayable	587000
CY2011Q4	us-gaap	Common Stockholders Equity CommonStockholdersEquity	679728000
CY2011Q4	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	2188000
CY2011Q4	us-gaap	Business Acquisition Purchase Price Allocation Liabilities Assumed BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed	7240000
CY2011Q4	us-gaap	Finite Lived Intangible Asset Off Market Lease Favorable Gross FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross	16536000
CY2011Q4	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired BusinessAcquisitionPurchasePriceAllocationAssetsAcquired	235798000
CY2011Q4	us-gaap	Business Acquisition Purchase Price Allocation Other Liabilities BusinessAcquisitionPurchasePriceAllocationOtherLiabilities	519000
CY2011Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	24805000
CY2011Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	22344000
CY2011Q4	us-gaap	Marketable Securities MarketableSecurities	28235000
CY2011Q4	us-gaap	Deferred Revenue DeferredRevenue	4784000
CY2011Q4	us-gaap	Finite Lived Intangible Asset Acquired In Place Leases FiniteLivedIntangibleAssetAcquiredInPlaceLeases	28862000
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	393000
CY2011Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	520000
CY2011Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	3848000
CY2011Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	224867000
CY2011Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	24675000
CY2011Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	33011000
CY2011Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	16738000
CY2011Q4	aat	Business Acquisition Purchase Price Allocation Land Improvements BusinessAcquisitionPurchasePriceAllocationLandImprovements	1595000
CY2011Q4	aat	Business Acquisition Purchase Price Allocation Tenant Improvements BusinessAcquisitionPurchasePriceAllocationTenantImprovements	12912000
CY2011Q4	aat	Business Acquisition Purchase Price Allocation Security Deposits BusinessAcquisitionPurchasePriceAllocationSecurityDeposits	433000
CY2011Q4	aat	Excludes Unamortized Fair Market Value Adjustments ExcludesUnamortizedFairMarketValueAdjustments	15900000
CY2011Q4	aat	Deferred Rent Expense And Lease Intangible DeferredRentExpenseAndLeaseIntangible	1122000
CY2011Q4	aat	Gross Secured Debt GrossSecuredDebt	927993000
CY2011Q4	aat	Business Acquisition Purchase Price Allocation Real Estate Property BusinessAcquisitionPurchasePriceAllocationRealEstateProperty	212546000
CY2011Q4	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	1850000
CY2011Q4	aat	Long Term Debt Continued Operation LongTermDebtContinuedOperation	912067000
CY2012Q1	aat	Line Of Credit Facility Maximum Leverage Percentage LineOfCreditFacilityMaximumLeveragePercentage	0.60	pure
CY2012Q1	aat	Minimum Fixed Charge Coverage Ratio On Revolving Credit Facility MinimumFixedChargeCoverageRatioOnRevolvingCreditFacility	1.50	pure
CY2012Q1	aat	Maximum Principal Amount Of Recourse Indebtedness MaximumPrincipalAmountOfRecourseIndebtedness	35000000
CY2012Q4	aat	Dividends Date Paid DividendsDatePaid	2012-12-28
CY2012Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	270494
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	3704000
CY2012Q4	us-gaap	Cash Fdic Insured Amount CashFDICInsuredAmount	250000
CY2012Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	1938676
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	3421189	shares
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	1456703000
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Land BusinessAcquisitionPurchasePriceAllocationLand	48706000
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	235980000
CY2012Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	4856000
CY2012Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	663589000
CY2012Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	63000
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	638361000
CY2012Q4	us-gaap	Other Finite Lived Intangible Assets Gross OtherFiniteLivedIntangibleAssetsGross	960000
CY2012Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	3459000
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2012Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	23	Property
CY2012Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	32183000
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	190139000
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	685729000
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	490000000	shares
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Buildings BusinessAcquisitionPurchasePriceAllocationBuildings	213596000
CY2012Q4	us-gaap	Secured Debt SecuredDebt	1044682000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	4054411	shares
CY2012Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	12998000
CY2012Q4	us-gaap	Lease Incentive Receivable LeaseIncentiveReceivable	1480000
CY2012Q4	us-gaap	Minority Interest Ownership Percentage By Noncontrolling Owners MinorityInterestOwnershipPercentageByNoncontrollingOwners	0.32	pure
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	320000
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	7421000
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Capital Lease Obligation Accrual BusinessAcquisitionPurchasePriceAllocationCapitalLeaseObligationAccrual	11239000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Three Years OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears	119871000
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	39664212	shares
CY2012Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	62811000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Five Years OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears	86081000
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1200000
CY2012Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	6440000
CY2012Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	4400000
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Intangible Assets Other Than Goodwill BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsOtherThanGoodwill	17028000
CY2012Q4	us-gaap	Liabilities Liabilities	1141858000
CY2012Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	3651000
CY2012Q4	us-gaap	Rental Properties RentalProperties	1891549000
CY2012Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	16829000
CY2012Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	33000000
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Accumulated Depreciation RealEstateAndAccumulatedDepreciationAccumulatedDepreciation	270494000
CY2012Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	54350000
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-25625000
CY2012Q4	us-gaap	Assets Assets	1827587000
CY2012Q4	us-gaap	Notes Payable NotesPayable	1057680000
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Carrying Costs RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts	290213000
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	1057680000
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1827587000
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	457017000
CY2012Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	73670000
CY2012Q4	us-gaap	Other Liabilities OtherLiabilities	50000
CY2012Q4	us-gaap	Minority Interest MinorityInterest	47368000
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	481973000
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	1044682000
CY2012Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	1668182000
CY2012Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	1938676000
CY2012Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	226300000
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	42479000
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Current Liabilities Accounts Payable BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesAccountsPayable	550000
CY2012Q4	us-gaap	Common Stockholders Equity CommonStockholdersEquity	685729000
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	233993000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Thereafter OperatingLeasesFutureMinimumPaymentsReceivableThereafter	152651000
CY2012Q4	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	2374000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Four Years OperatingLeasesFutureMinimumPaymentsReceivableInFourYears	101595000
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Liabilities Assumed BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed	13123000
CY2012Q4	us-gaap	Finite Lived Intangible Asset Off Market Lease Favorable Gross FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross	11483000
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired BusinessAcquisitionPurchasePriceAllocationAssetsAcquired	290113000
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Other Liabilities BusinessAcquisitionPurchasePriceAllocationOtherLiabilities	519000
CY2012Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	29509000
CY2012Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	29395000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable OperatingLeasesFutureMinimumPaymentsReceivable	743264000
CY2012Q4	us-gaap	Deferred Revenue DeferredRevenue	6383000
CY2012Q4	us-gaap	Finite Lived Intangible Asset Acquired In Place Leases FiniteLivedIntangibleAssetAcquiredInPlaceLeases	34308000
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	397000
CY2012Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	637000
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	113974000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	4239000
CY2012Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	270494000
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	279890000
CY2012Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	14944000
CY2012Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	18329000
CY2012Q4	aat	Operating Leases Future Minimum Payments Receivable Year One OperatingLeasesFutureMinimumPaymentsReceivableYearOne	150979000
CY2012Q4	aat	Number Of States NumberOfStates	5	State
CY2012Q4	aat	Business Acquisition Purchase Price Allocation Land Improvements BusinessAcquisitionPurchasePriceAllocationLandImprovements	888000
CY2012Q4	aat	Business Acquisition Purchase Price Allocation Tenant Improvements BusinessAcquisitionPurchasePriceAllocationTenantImprovements	6884000
CY2012Q4	aat	Business Acquisition Purchase Price Allocation Security Deposits BusinessAcquisitionPurchasePriceAllocationSecurityDeposits	815000
CY2012Q4	aat	Excludes Unamortized Fair Market Value Adjustments ExcludesUnamortizedFairMarketValueAdjustments	13000000
CY2012Q4	aat	Deferred Rent Expense And Lease Intangible DeferredRentExpenseAndLeaseIntangible	1008000
CY2012Q4	aat	Gross Secured Debt GrossSecuredDebt	1057680000
CY2012Q4	aat	Shares Held By Minority Interest In Operating Partnerships SharesHeldByMinorityInterestInOperatingPartnerships	18023435	shares
CY2012Q4	aat	Percentage Limit On Annual Distributions In Relation To Funds From Operations PercentageLimitOnAnnualDistributionsInRelationToFundsFromOperations	0.950	pure
CY2012Q4	aat	Real Estate Properties Held For Development RealEstatePropertiesHeldForDevelopment	5	Property
CY2012Q4	aat	Number Of Rooms In Mixed Use Segment All Suite Hotel NumberOfRoomsInMixedUseSegmentAllSuiteHotel	369	Room
CY2010	us-gaap	Management Fees Revenue ManagementFeesRevenue	2487000
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	552000
CY2011Q1	us-gaap	Proceeds From Issuance Of Private Placement ProceedsFromIssuanceOfPrivatePlacement	5400000
CY2012Q4	aat	Long Term Debt Continued Operation LongTermDebtContinuedOperation	1044682000
CY2012Q4	aat	Stated Future Monthly Lease Rate StatedFutureMonthlyLeaseRate	61690
CY2012Q4	aat	Business Acquisition Purchase Price Allocation Real Estate Property BusinessAcquisitionPurchasePriceAllocationRealEstateProperty	270074000
CY2012Q4	aat	Lease Incentive Accumulated Amortization LeaseIncentiveAccumulatedAmortization	2220000
CY2011Q1	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	251050	shares
CY2011Q2	aat	Mortgage Real Estate Loan Maturity Period MortgageRealEstateLoanMaturityPeriod	P5Y
CY2011Q2	aat	Non Recourse Mortgage Loan Maturity Date NonRecourseMortgageLoanMaturityDate	2016-07-01
CY2011Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	123950	shares
CY2012Q1	aat	Non Recourse Mortgage Loan Maturity Date NonRecourseMortgageLoanMaturityDate	2019-04-01
CY2012Q4	us-gaap	Mortgage Loan On Real Estate Final Maturity Date MortgageLoanOnRealEstateFinalMaturityDate	2022-11-01
CY2012Q4	us-gaap	Mortgage Loans On Real Estate Interest Rate MortgageLoansOnRealEstateInterestRate	0.0398	pure
CY2012Q4	aat	Non Recourse Mortgage Loan Agreement NonRecourseMortgageLoanAgreement	P10Y
CY2010	us-gaap	Real Estate Accumulated Depreciation Depreciation Expense RealEstateAccumulatedDepreciationDepreciationExpense	28462
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	42422000
CY2010	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-800000
CY2010	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	1233000
CY2010	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	4297000
CY2010	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	74000
CY2010	us-gaap	Other Real Estate Revenue OtherRealEstateRevenue	2583000
CY2010	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1846000
CY2010	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	-885000
CY2010	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	5187000
CY2010	us-gaap	Minority Interest In Net Income Loss Joint Venture Partners MinorityInterestInNetIncomeLossJointVenturePartners	-2205000
CY2010	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	11688000
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	34419000
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	43159000
CY2010	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1622000
CY2010	us-gaap	Amortization Of Leased Asset AmortizationOfLeasedAsset	4460000
CY2010	us-gaap	Investments In And Advances To Affiliates Dividends Or Interest InvestmentsInAndAdvancesToAffiliatesDividendsOrInterest	59000
CY2010	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	3206000
CY2010	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	600000
CY2010	us-gaap	Profit Loss ProfitLoss	2174000
CY2010	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	589
CY2010	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	11203000
CY2010	us-gaap	Depreciation And Amortization DepreciationAndAmortization	34419000
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	48346000
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-29505000
CY2010	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	436000
CY2010	us-gaap	Real Estate Improvements RealEstateImprovements	8383
CY2010	us-gaap	Servicing Fees Net ServicingFeesNet	957000
CY2010	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	11051000
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	17764000
CY2010	us-gaap	Marketing Expense MarketingExpense	674000
CY2010	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	2401000
CY2010	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	8699000
CY2010	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	188971
CY2010	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	5155000
CY2010	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	115165000
CY2010	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	6713000
CY2010	aat	Net Income Attributable To Predecessors Controlled Owners Equity NetIncomeAttributableToPredecessorsControlledOwnersEquity	4379000
CY2010	aat	Property Profit PropertyProfit	85540000
CY2010	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	19000
CY2010	us-gaap	Interest And Other Income InterestAndOtherIncome	73000
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1077000
CY2010	us-gaap	Percentage Rent PercentageRent	1217000
CY2010	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	32962000
CY2010	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	1536000
CY2010	us-gaap	Interest Costs Incurred InterestCostsIncurred	43251000
CY2010	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-1100000
CY2010	us-gaap	Operating Expenses OperatingExpenses	75326000
CY2010	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	12415000
CY2010	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	36200000
CY2010	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	5102000
CY2010	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-4406000
CY2010	us-gaap	Cost Of Real Estate Revenue CostOfRealEstateRevenue	20520000
CY2010	us-gaap	Revenues Revenues	117748000
CY2010	us-gaap	Tenant Reimbursements TenantReimbursements	18576000
CY2010	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	25681000
CY2010	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	1058000
CY2010	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	25681000
CY2010	us-gaap	Revenues From Transactions With Other Operating Segments Of Same Entity RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity	85540000
CY2010	us-gaap	Proceeds From Secured Notes Payable ProceedsFromSecuredNotesPayable	7500000
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-28620000
CY2010	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	800000
CY2010	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	3929000
CY2010	us-gaap	Asset Management Fees AssetManagementFees	130000
CY2010	us-gaap	Interest Paid Net InterestPaidNet	45634000
CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1182000
CY2010	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	589
CY2010	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	552000
CY2010	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	12873000
CY2010	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	133000000
CY2010	us-gaap	Contributions From Noncontrolling Interests ContributionsFromNoncontrollingInterests	-7665000
CY2010	us-gaap	Interest Expense InterestExpense	43251000
CY2010	aat	Increase Decrease In Security Deposits And Other Liabilities IncreaseDecreaseInSecurityDepositsAndOtherLiabilities	-45000
CY2010	aat	Amortization Of Debt Issuance Costs And Debt Fair Value Adjustments AmortizationOfDebtIssuanceCostsAndDebtFairValueAdjustments	503000
CY2010	aat	Management Fee Expense ManagementFeeExpense	89000
CY2010	aat	Acquisition Of Working Capital Deficit Net Of Cash AcquisitionOfWorkingCapitalDeficitNetOfCash	1972000
CY2010	aat	Accounts Payable And Accrued Liabilities For Construction In Progress AccountsPayableAndAccruedLiabilitiesForConstructionInProgress	120000
CY2010	aat	Distribution Of Capital From Real Estate Joint Ventures DistributionOfCapitalFromRealEstateJointVentures	10607000
CY2010	aat	Contributions From Predecessors Controlling And Noncontrolling Interests ContributionsFromPredecessorsControllingAndNoncontrollingInterests	7665000
CY2010	aat	Maintenance Reimbursements MaintenanceReimbursements	120000
CY2010	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	1080000
CY2010	aat	Real Estate Joint Venture Fee Income Loss RealEstateJointVentureFeeIncomeLoss	2487000
CY2010	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	1126000
CY2010	aat	Real Estate Joint Venture Income Loss RealEstateJointVentureIncomeLoss	4406000
CY2010	aat	Construction Management Fees ConstructionManagementFees	47000
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.10
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	3810000
CY2011	us-gaap	Proceeds From Sale And Maturity Of Trading Securities Heldforinvestment ProceedsFromSaleAndMaturityOfTradingSecuritiesHeldforinvestment	4993000
CY2011	us-gaap	Real Estate Accumulated Depreciation Depreciation Expense RealEstateAccumulatedDepreciationDepreciationExpense	42498
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.10
CY2011	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-25867000
CY2011	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	15222000
CY2011	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	12225
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	56343000
CY2011	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-2666000
CY2011	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	38000
CY2011	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	46371000
CY2011	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	-97000
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	596541000
CY2011	us-gaap	Other Real Estate Revenue OtherRealEstateRevenue	8617000
CY2011	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	1388000
CY2011	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	212000
CY2011	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-893000
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2615000
CY2011	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	29047000
CY2011	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	100000
CY2011	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	6164000
CY2011	us-gaap	Minority Interest In Net Income Loss Joint Venture Partners MinorityInterestInNetIncomeLossJointVenturePartners	-2458000
CY2011	us-gaap	Revenue From Leased And Owned Hotels RevenueFromLeasedAndOwnedHotels	27125000
CY2011	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	18746000
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	55936000
CY2011	us-gaap	Direct Costs Of Hotels DirectCostsOfHotels	18885000
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	2615000
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	59200000
CY2011	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	13671000
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.08
CY2011	us-gaap	Amortization Of Leased Asset AmortizationOfLeasedAsset	9976000
CY2011	us-gaap	Investments In And Advances To Affiliates Dividends Or Interest InvestmentsInAndAdvancesToAffiliatesDividendsOrInterest	3000
CY2011	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	2128000
CY2011	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	3069000
CY2011	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	21797000
CY2011	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2000000
CY2011	us-gaap	Profit Loss ProfitLoss	19324000
CY2011	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	17675
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	65364000
CY2011	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	10133000
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	483000
CY2011	us-gaap	Depreciation And Amortization DepreciationAndAmortization	55936000
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-231689000
CY2011	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2961000
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	172000
CY2011	us-gaap	Real Estate Improvements RealEstateImprovements	13595
CY2011	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	38013000
CY2011	us-gaap	Management Fees Revenue ManagementFeesRevenue	44000
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	5653000
CY2011	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	3981000
CY2011	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	588011000
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	70770000
CY2011	us-gaap	Marketing Expense MarketingExpense	1390000
CY2011	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	19279000
CY2011	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	13627000
CY2011	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	563858
CY2011	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2040000
CY2011	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	600000
CY2011	us-gaap	Restricted Stock Expense RestrictedStockExpense	2600000
CY2011	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	194168000
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	54219807000	shares
CY2011	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3570000
CY2011	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	573000
CY2011	us-gaap	Interest And Other Income InterestAndOtherIncome	1621000
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.08
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	237095000
CY2011	us-gaap	Stockholders Equity Other StockholdersEquityOther	11480000
CY2011	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.02
CY2011	us-gaap	Distribution Made To Member Or Limited Partner Cash Distributions Paid DistributionMadeToMemberOrLimitedPartnerCashDistributionsPaid	-6075000
CY2011	us-gaap	Percentage Rent PercentageRent	1967000
CY2011	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	37599
CY2011	us-gaap	Straight Line Rent StraightLineRent	4800000
CY2011	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	231558000
CY2011	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	2444000
CY2011	us-gaap	Interest Costs Incurred InterestCostsIncurred	54580000
CY2011	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	13221000
CY2011	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-1100000
CY2011	us-gaap	Operating Expenses OperatingExpenses	146442000
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36748806000	shares
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	90000
CY2011	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	22008000
CY2011	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	8082000
CY2011	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-188000
CY2011	us-gaap	Cost Of Real Estate Revenue CostOfRealEstateRevenue	58133000
CY2011	us-gaap	Proceeds From Issuance Of Private Placement ProceedsFromIssuanceOfPrivatePlacement	5410000
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	-1813000
CY2011	us-gaap	Revenues Revenues	202785000
CY2011	us-gaap	Revenues From Transactions With Other Operating Segments Of Same Entity RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity	125906000
CY2011	us-gaap	Tenant Reimbursements TenantReimbursements	24463000
CY2011	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	39960000
CY2011	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	33103000
CY2011	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.80
CY2011	us-gaap	Dividends Dividends	46123000
CY2011	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	3379000
CY2011	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	39960000
CY2011	us-gaap	Proceeds From Secured Notes Payable ProceedsFromSecuredNotesPayable	84500000
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-260736000
CY2011	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	33854000
CY2011	us-gaap	Minority Interest Increase From Stock Issuance MinorityInterestIncreaseFromStockIssuance	828000
CY2011	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	10777000
CY2011	us-gaap	Net Income Loss NetIncomeLoss	2917000
CY2011	us-gaap	Interest Paid Net InterestPaidNet	52713000
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2767000
CY2011	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	17675
CY2011	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	5410000
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	831000
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-893000
CY2011	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.02
CY2011	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	1672000
CY2011	us-gaap	Payments Of Dividends PaymentsOfDividends	46123000
CY2011	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	264250000
CY2011	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	268008000
CY2011	us-gaap	Interest Expense InterestExpense	54580000
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	4305000
CY2011	aat	Increase Decrease In Security Deposits And Other Liabilities IncreaseDecreaseInSecurityDepositsAndOtherLiabilities	-943000
CY2011	aat	Amortization Of Debt Issuance Costs And Debt Fair Value Adjustments AmortizationOfDebtIssuanceCostsAndDebtFairValueAdjustments	3883000
CY2011	aat	Loan Transfer And Consent Fees LoanTransferAndConsentFees	8808000
CY2011	aat	Distribution Of Investment In Joint Venture Not Acquired DistributionOfInvestmentInJointVentureNotAcquired	11480000
CY2011	aat	Notes Receivable From Affiliate Settled In Common Units NotesReceivableFromAffiliateSettledInCommonUnits	21797000
CY2011	aat	Notes Payable To Affiliates Settled In Common Units NotesPayableToAffiliatesSettledInCommonUnits	828000
CY2011	aat	Payments To Nonaccredited Investors PaymentsToNonaccreditedInvestors	6075000
CY2011	aat	Defeasance Costs On Repayment Of Secured Notes Payable DefeasanceCostsOnRepaymentOfSecuredNotesPayable	24345000
CY2011	aat	Ordinary Income Dividends Per Share OrdinaryIncomeDividendsPerShare	0.22
CY2011	aat	Return Of Capital Dividends Per Share ReturnOfCapitalDividendsPerShare	0.58
CY2011	aat	Common Stock Dividend Rate Percentage CommonStockDividendRatePercentage	1.000	pure
CY2011	aat	Ordinary Income Dividends Percentage OrdinaryIncomeDividendsPercentage	0.275	pure
CY2011	aat	Management Fee Expense ManagementFeeExpense	1622000
CY2011	aat	Acquisition Of Working Capital Deficit Net Of Cash AcquisitionOfWorkingCapitalDeficitNetOfCash	4176000
CY2011	aat	Accounts Payable And Accrued Liabilities For Construction In Progress AccountsPayableAndAccruedLiabilitiesForConstructionInProgress	2396000
CY2011	aat	Assumption Of Notes To Affiliates Upon Acquisition AssumptionOfNotesToAffiliatesUponAcquisition	14824000
CY2011	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	17471001000	shares
CY2011	aat	Income Loss From Continuing Operations Attributable To Common Stockholders Diluted IncomeLossFromContinuingOperationsAttributableToCommonStockholdersDiluted	-1318000
CY2011	aat	Minority Interest In Continuing Operations Income Loss Joint Venture Partners MinorityInterestInContinuingOperationsIncomeLossJointVenturePartners	2455000
CY2011	aat	Income Loss From Continuing Operations Attributable To Predecessors Controlled Owners Equity IncomeLossFromContinuingOperationsAttributableToPredecessorsControlledOwnersEquity	16962000
CY2011	aat	Maintenance Reimbursements MaintenanceReimbursements	6000
CY2011	aat	Net Income Attributable To Predecessors Controlled Owners Equity NetIncomeAttributableToPredecessorsControlledOwnersEquity	16995000
CY2011	aat	Loan Transfer And Consent Fees Paid LoanTransferAndConsentFeesPaid	-8350000
CY2011	aat	Property Profit PropertyProfit	125906000
CY2011	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-3735000
CY2011	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	482000
CY2011	aat	Real Estate Joint Venture Fee Income Loss RealEstateJointVentureFeeIncomeLoss	44000
CY2011	aat	Ipo Offering Costs Prepaid By Predecessor IpoOfferingCostsPrepaidByPredecessor	1974000
CY2011	aat	Real Estate Acquisition Related Expense RealEstateAcquisitionRelatedExpense	434000
CY2011	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships MinorityInterestInContinuingOperationsIncomeLossOperatingPartnerships	425000
CY2011	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	1436000
CY2011	aat	Real Estate Joint Venture Income Loss RealEstateJointVentureIncomeLoss	188000
CY2011	aat	Maximum Percentage Of Revenue Provided By Any Single Tenant MaximumPercentageOfRevenueProvidedByAnySingleTenant	0.10	pure
CY2011	aat	Weighted Average Unvested Participating Securities Outstanding WeightedAverageUnvestedParticipatingSecuritiesOutstanding	578489	shares
CY2011	aat	Percentage Of Revenue Provided By Retail Tenants PercentageOfRevenueProvidedByRetailTenants	0.427	pure
CY2011	aat	Transfer Taxes Accrued At Time Of Offering TransferTaxesAccruedAtTimeOfOffering	6556000
CY2011	aat	Return Of Capital Dividends Percentage ReturnOfCapitalDividendsPercentage	0.725	pure
CY2012	dei	Trading Symbol TradingSymbol	AAT
CY2012	dei	Entity Registrant Name EntityRegistrantName	AMERICAN ASSETS TRUST, INC.
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0001500217
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.66
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	25758000
CY2012	us-gaap	Proceeds From Sale And Maturity Of Trading Securities Heldforinvestment ProceedsFromSaleAndMaturityOfTradingSecuritiesHeldforinvestment	4384000
CY2012	us-gaap	Real Estate Accumulated Depreciation Depreciation Expense RealEstateAccumulatedDepreciationDepreciationExpense	47792
CY2012	us-gaap	Loss On Contract Termination For Default LossOnContractTerminationForDefault	5700000
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.66
CY2012	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div> <p style="MARGIN-TOP: 18px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2"><b><i>Reclassifications</i></b></font></p> <p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"> <font style="FONT-FAMILY: Times New Roman" size="2">Certain items in the consolidated financial statements for prior periods have been reclassified to conform to current classifications.</font></p> </div>
CY2012	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	9216
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	71906000
CY2012	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-2422000
CY2012	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	746000
CY2012	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	1000000
CY2012	us-gaap	Other Real Estate Revenue OtherRealEstateRevenue	10217000
CY2012	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	16133000
CY2012	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-629000
CY2012	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	9181000
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2852000
CY2012	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	87601000
CY2012	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	382000
CY2012	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	164000000
CY2012	us-gaap	Revenue From Leased And Owned Hotels RevenueFromLeasedAndOwnedHotels	31729000
CY2012	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	22025000
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	61853000
CY2012	us-gaap	Direct Costs Of Hotels DirectCostsOfHotels	20905000
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	2852000
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	75563000
CY2012	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	13949000
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.90
CY2012	us-gaap	Amortization Of Leased Asset AmortizationOfLeasedAsset	10485000
CY2012	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-1799000
CY2012	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-2557000
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	118000
CY2012	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	600000
CY2012	us-gaap	Profit Loss ProfitLoss	51601000
CY2012	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	2797
CY2012	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	6734000
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	361000
CY2012	us-gaap	Depreciation And Amortization DepreciationAndAmortization	61853000
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	75945000
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-194295000
CY2012	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1355000
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	1239000
CY2012	us-gaap	Real Estate Improvements RealEstateImprovements	41303
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	202000
CY2012	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	700000
CY2012	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	164000000
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	37652000
CY2012	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	36720000
CY2012	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	Segment
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-70244000
CY2012	us-gaap	Marketing Expense MarketingExpense	1266000
CY2012	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	15593000
CY2012	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	270082
CY2012	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-143000
CY2012	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	600000
CY2012	us-gaap	Restricted Stock Expense RestrictedStockExpense	2900000
CY2012	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	225249000
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	57053909000	shares
CY2012	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	203000
CY2012	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-63000
CY2012	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	1016000
CY2012	us-gaap	Interest And Other Income InterestAndOtherIncome	336000
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.90
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	48106000
CY2012	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.24
CY2012	us-gaap	Percentage Rent PercentageRent	2608000
CY2012	us-gaap	Payments To Acquire Real Estate And Real Estate Joint Ventures PaymentsToAcquireRealEstateAndRealEstateJointVentures	228800000
CY2012	us-gaap	Payment Of Financing And Stock Issuance Costs PaymentOfFinancingAndStockIssuanceCosts	361000
CY2012	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	57188
CY2012	us-gaap	Straight Line Rent StraightLineRent	7200000
CY2012	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	273990000
CY2012	us-gaap	Increase Decrease In Lease Acquisition Costs IncreaseDecreaseInLeaseAcquisitionCosts	3456000
CY2012	us-gaap	Interest Costs Incurred InterestCostsIncurred	58074000
CY2012	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	38038000
CY2012	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-200000
CY2012	us-gaap	Operating Expenses OperatingExpenses	163560000
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	38736113000	shares
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	335000
CY2012	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	24264000
CY2012	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	9452000
CY2012	us-gaap	Cost Of Real Estate Revenue CostOfRealEstateRevenue	64089000
CY2012	us-gaap	Noncash Commission And Closing Costs NoncashCommissionAndClosingCosts	100000
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	-11894000
CY2012	us-gaap	Revenues Revenues	235466000
CY2012	us-gaap	Tenant Reimbursements TenantReimbursements	27763000
CY2012	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.84
CY2012	us-gaap	Dividends Dividends	48452000
CY2012	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	3813000
CY2012	us-gaap	Revenues From Transactions With Other Operating Segments Of Same Entity RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity	149352000
CY2012	us-gaap	Proceeds From Secured Notes Payable ProceedsFromSecuredNotesPayable	132900000
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-281896000
CY2012	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	23191000
CY2012	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	34582000
CY2012	us-gaap	Net Income Loss NetIncomeLoss	34939000
CY2012	us-gaap	Interest Paid Net InterestPaidNet	55349000
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2378000
CY2012	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	2677
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1016000
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	9181000
CY2012	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.24
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<div> <p style="MARGIN-TOP: 18px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2"><b><i>Use of Estimates</i></b></font></p> <p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"> <font style="FONT-FAMILY: Times New Roman" size="2">The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America, referred to as “GAAP,” requires management to make estimates and assumptions that in certain circumstances affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities, and revenues and expenses. These estimates are prepared using management’s best judgment, after considering past, current and expected events and economic conditions. Actual results could differ from these estimates.</font></p> </div>
CY2012	us-gaap	Business Acquisition Effective Date Of Acquisition1 BusinessAcquisitionEffectiveDateOfAcquisition1	2012-01-24
CY2012	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	932000
CY2012	us-gaap	Payments Of Dividends PaymentsOfDividends	48452000
CY2012	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	34626000
CY2012	us-gaap	Interest Expense InterestExpense	57328000
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	51072000
CY2012	aat	Financing Related Fees FinancingRelatedFees	50000
CY2012	aat	Increase Decrease In Security Deposits And Other Liabilities IncreaseDecreaseInSecurityDepositsAndOtherLiabilities	136000
CY2012	aat	Amortization Of Debt Issuance Costs And Debt Fair Value Adjustments AmortizationOfDebtIssuanceCostsAndDebtFairValueAdjustments	3911000
CY2012	aat	Payments Of Loan Transfer And Consent Fees PaymentsOfLoanTransferAndConsentFees	9000000
CY2012	aat	Cash Equivalents Maturity Period CashEquivalentsMaturityPeriod	P3M
CY2012	aat	Ordinary Income Dividends Per Share OrdinaryIncomeDividendsPerShare	0.56
CY2012	aat	Return Of Capital Dividends Per Share ReturnOfCapitalDividendsPerShare	0.28
CY2012	aat	Common Stock Dividend Rate Percentage CommonStockDividendRatePercentage	1.000	pure
CY2012	aat	Ordinary Income Dividends Percentage OrdinaryIncomeDividendsPercentage	0.667	pure
CY2012	aat	Management Fee Expense ManagementFeeExpense	2011000
CY2012	aat	Additional Term Of Revolving Credit Facility Based On Specified Requirements AdditionalTermOfRevolvingCreditFacilityBasedOnSpecifiedRequirements	P1Y
CY2012	aat	Accounts Payable And Accrued Liabilities For Construction In Progress AccountsPayableAndAccruedLiabilitiesForConstructionInProgress	4944000
CY2012	aat	Approximate Additional Credits Received To Purchase Price ApproximateAdditionalCreditsReceivedToPurchasePrice	6900000
CY2012	aat	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	18317796000	shares
CY2012	aat	Income Loss From Continuing Operations Attributable To Common Stockholders Diluted IncomeLossFromContinuingOperationsAttributableToCommonStockholdersDiluted	13420000
CY2012	aat	Months Maximum Term Length Of Apartment Leases MonthsMaximumTermLengthOfApartmentLeases	P15M
CY2012	aat	Period Of Amortization Schedule PeriodOfAmortizationSchedule	P30Y
CY2012	aat	First Installment Vested On Date Of Grant FirstInstallmentVestedOnDateOfGrant	3	Installment
CY2012	aat	Number Of Consolidated Properties NumberOfConsolidatedProperties	13	Property
CY2012	aat	Months Minimum Term Of Apartment Leases MonthsMinimumTermOfApartmentLeases	P7M
CY2012	aat	Property Profit PropertyProfit	149352000
CY2012	aat	Line Of Credit Facility Material Acquisition LineOfCreditFacilityMaterialAcquisition	Greater than $100 million
CY2012	aat	Number Of Units Converted Into Shares Of Common Stock NumberOfUnitsConvertedIntoSharesOfCommonStock	372654	shares
CY2012	aat	Deferred Rent Revenue And Amortization Of Lease Intangibles DeferredRentRevenueAndAmortizationOfLeaseIntangibles	-6967000
CY2012	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	529000
CY2012	aat	Percentage Partners Common Units PercentagePartnersCommonUnits	0.50	pure
CY2012	aat	Real Estate Acquisition Related Expense RealEstateAcquisitionRelatedExpense	152000
CY2012	aat	Restricted Stock Units Granted To Board RestrictedStockUnitsGrantedToBoard	one-third
CY2012	aat	Minority Interest In Continuing Operations Income Loss Operating Partnerships MinorityInterestInContinuingOperationsIncomeLossOperatingPartnerships	-4239000
CY2012	aat	Other Real Estate Rental Revenue OtherRealEstateRentalRevenue	1597000
CY2012	aat	Maximum Percentage Of Revenue Provided By Any Single Tenant MaximumPercentageOfRevenueProvidedByAnySingleTenant	0.10	pure
CY2012	aat	Weighted Average Unvested Participating Securities Outstanding WeightedAverageUnvestedParticipatingSecuritiesOutstanding	629493	shares
CY2012	aat	Percentage Of Revenue Provided By Retail Tenants PercentageOfRevenueProvidedByRetailTenants	0.391	pure
CY2012	aat	Years Maximum Term Range Of Office And Retail Leases YearsMaximumTermRangeOfOfficeAndRetailLeases	P10Y
CY2012	aat	Vesting Installments Of Restricted Shares VestingInstallmentsOfRestrictedShares	2	Installment
CY2012	aat	Percentage Of Investment In Related Party PercentageOfInvestmentInRelatedParty	0.477	pure
CY2012	aat	Years Minimum Term Range Of Office And Retail Leases YearsMinimumTermRangeOfOfficeAndRetailLeases	P3Y
CY2012	aat	Leasing Fee Percent Fee LeasingFeePercentFee	0.010	pure
CY2012	aat	Return Of Capital Dividends Percentage ReturnOfCapitalDividendsPercentage	0.333	pure
CY2011Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	14765000
CY2011Q1	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	329000
CY2011Q1	us-gaap	Minority Interest In Net Income Loss Joint Venture Partners MinorityInterestInNetIncomeLossJointVenturePartners	2458000
CY2011Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	13342000
CY2011Q1	us-gaap	Profit Loss ProfitLoss	13596000
CY2011Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.02
CY2011Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic And Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare	0.01
CY2011Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	254000
CY2011Q1	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	-0.03
CY2011Q1	us-gaap	Revenues Revenues	45259000
CY2011Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.17
CY2011Q1	us-gaap	Net Income Loss NetIncomeLoss	-698000
CY2011Q1	aat	Dividends Period Covered DividendsPeriodCovered	January 19, 2011 to March 31, 2011
CY2011Q1	aat	Dividends Quarterly Period DividendsQuarterlyPeriod	First Quarter 2011
CY2011Q1	aat	Net Income Attributable To Predecessors Controlled Owners Equity NetIncomeAttributableToPredecessorsControlledOwnersEquity	16995000
CY2011Q1	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	86000
CY2011Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	12969000
CY2011Q2	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	-104000
CY2011Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-172000
CY2011Q2	us-gaap	Profit Loss ProfitLoss	455000
CY2011Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.01
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic And Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare	0.01
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	627000
CY2011Q2	us-gaap	Revenues Revenues	49318000
CY2011Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.21
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	219000
CY2011Q2	aat	Dividends Period Covered DividendsPeriodCovered	April 1, 2011 to June 30, 2011
CY2011Q2	aat	Dividends Quarterly Period DividendsQuarterlyPeriod	Second Quarter 2011
CY2011Q2	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	132000
CY2011Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	14427000
CY2011Q3	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	-1434000
CY2011Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-59000
CY2011Q3	us-gaap	Profit Loss ProfitLoss	4618000
CY2011Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.08
CY2011Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic And Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare	0.08
CY2011Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	4677000
CY2011Q3	us-gaap	Revenues Revenues	54370000
CY2011Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.21
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	3052000
CY2011Q3	aat	Dividends Period Covered DividendsPeriodCovered	July 1, 2011 to September 30, 2011
CY2011Q3	aat	Dividends Quarterly Period DividendsQuarterlyPeriod	Third Quarter 2011
CY2011Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	132000
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	16812000
CY2012Q1	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	-883000
CY2012Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	2763000
CY2012Q1	us-gaap	Profit Loss ProfitLoss	2871000
CY2012Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.05
CY2012Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	108000
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	0.05
CY2012Q1	us-gaap	Revenues Revenues	55449000
CY2012Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.21
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	1856000
CY2012Q1	aat	Dividends Period Covered DividendsPeriodCovered	January 1, 2012 to March 31, 2012
CY2012Q1	aat	Dividends Quarterly Period DividendsQuarterlyPeriod	First Quarter 2012
CY2012Q1	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	132000
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	16641000
CY2012Q2	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	-804000
CY2012Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	2396000
CY2012Q2	us-gaap	Profit Loss ProfitLoss	2624000
CY2012Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.04
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	228000
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	0.04
CY2012Q2	us-gaap	Revenues Revenues	56131000
CY2012Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.21
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	1689000
CY2012Q2	aat	Dividends Period Covered DividendsPeriodCovered	April 1, 2012 to June 30, 2012
CY2012Q2	aat	Dividends Quarterly Period DividendsQuarterlyPeriod	Second Quarter 2012
CY2012Q2	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	131000
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	18206000
CY2012Q3	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	-1335000
CY2012Q3	us-gaap	Proceeds From Unsecured Lines Of Credit ProceedsFromUnsecuredLinesOfCredit	164000000
CY2012Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	3968000
CY2012Q3	us-gaap	Profit Loss ProfitLoss	4285000
CY2012Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.08
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic And Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare	0.01
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	317000
CY2012Q3	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	0.07
CY2012Q3	us-gaap	Revenues Revenues	60766000
CY2012Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.21
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	2817000
CY2012Q3	aat	Dividends Period Covered DividendsPeriodCovered	July 1, 2012 to September 30, 2012
CY2012Q3	aat	Dividends Quarterly Period DividendsQuarterlyPeriod	Third Quarter 2012
CY2012Q3	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	133000
CY2011Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	14182000
CY2011Q4	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	-179000
CY2011Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	560000
CY2011Q4	us-gaap	Profit Loss ProfitLoss	655000
CY2011Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.01
CY2011Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	95000
CY2011Q4	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	0.01
CY2011Q4	us-gaap	Revenues Revenues	53838000
CY2011Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.21
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	344000
CY2011Q4	aat	Dividends Period Covered DividendsPeriodCovered	October 1, 2011 to December 31, 2011
CY2011Q4	aat	Dividends Quarterly Period DividendsQuarterlyPeriod	Fourth Quarter 2011
CY2011Q4	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	132000
CY2012Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	20247000
CY2012Q4	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	-13111000
CY2012Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	4822000
CY2012Q4	us-gaap	Profit Loss ProfitLoss	41821000
CY2012Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.73
CY2012Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic And Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare	0.65
CY2012Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	36999000
CY2012Q4	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	0.08
CY2012Q4	us-gaap	Revenues Revenues	63120000
CY2012Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.21
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	28577000
CY2012Q4	aat	Dividends Period Covered DividendsPeriodCovered	October 1, 2012 to December 31, 2012
CY2012Q4	aat	Dividends Quarterly Period DividendsQuarterlyPeriod	Fourth Quarter 2012
CY2012Q4	aat	Net Income Attributable To Restricted Share NetIncomeAttributableToRestrictedShare	133000

Files In Submission

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2011 Q4 Form 10-K Financial Statement

#000119312513071652 Filed on February 22, 2013

Income Statement

Balance Sheet

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Facts In Submission

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$AAT American Assets Trust, Inc. Stock $aat

2011 Q4 Form 10-K Financial Statement

#000119312513071652 Filed on February 22, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AAT
American Assets Trust, Inc. Stock $aat