$ELME
Elme Communities Stock $elme

$elme Overview Financials Valuation SEC Filings Company Website

2011 Form 10-K Financial Statement

#000010489412000029 Filed on February 27, 2012

Income Statement

Concept	2011	2010 Q4	2010 Q3
Revenue	$234.7M	$65.36M	$65.03M
YoY Change	-7.27%	-13.73%	-7.38%
Cost Of Revenue	$79.60M	$21.03M	$21.91M
YoY Change	-6.02%	-16.94%	-8.75%
Gross Profit	$155.1M	$44.33M	$43.12M
YoY Change	-7.9%	-12.15%	-6.67%
Gross Profit Margin	66.08%	67.82%	66.31%
Selling, General & Admin	$15.70M	$3.950M	$3.140M
YoY Change	9.03%	23.82%	-10.8%
% of Gross Profit	10.12%	8.91%	7.28%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$100.5M	$24.10M	$24.30M
YoY Change	4.99%	0.84%	2.53%
% of Gross Profit	64.81%	54.36%	56.35%
Operating Expenses	$90.20M	$24.45M	$23.37M
YoY Change	-3.01%	-7.91%	-9.03%
Operating Profit	$46.85M	$19.88M	$19.75M
YoY Change	-36.98%	-16.85%	-3.71%
Interest Expense	$61.40M	-$17.57M	-$16.72M
YoY Change	-8.31%	0.11%	-4.62%
% of Operating Profit	131.07%	-88.38%	-84.66%
Other Income/Expense, Net	-$61.23M	$320.0K	$290.0K
YoY Change	-18.29%	6.67%	-680.0%
Pretax Income	-$14.40M	-$6.960M	$3.090M
YoY Change	2300.0%	-237.01%	8.42%
Income Tax	$0.00	$0.00	$0.00
% Of Pretax Income			0.0%
Net Earnings	$104.9M	$10.59M	$6.625M
YoY Change	180.24%	46.28%	-30.48%
Net Earnings / Revenue	44.68%	16.2%	10.19%
Basic Earnings Per Share	$1.58	$0.16	$0.11
Diluted Earnings Per Share	$1.58	$0.16	$0.10
COMMON SHARES
Basic Shares Outstanding	65.98M shares
Diluted Shares Outstanding	65.98M shares

Balance Sheet

Concept	2011	2010 Q4	2010 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$12.80M	$78.80M	$262.4M
YoY Change	-83.76%	603.57%	3595.77%
Cash & Equivalents	$12.80M	$78.68M	$262.4M
Short-Term Investments
Other Short-Term Assets	$120.1M	$92.00M	$92.90M
YoY Change	90.03%	-4.17%	-10.84%
Inventory
Prepaid Expenses
Receivables	$53.20M	$44.30M
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$186.1M	$215.1M	$404.5M
YoY Change	-0.11%	37.18%	152.34%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.887B	$1.618B	$1.791B
YoY Change	16.63%	-11.01%	-3.86%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$48.20M	$335.3M	$116.0M
YoY Change	-86.76%	373.59%	224.93%
Total Long-Term Assets	$1.935B	$1.953B	$1.907B
YoY Change	-2.37%	3.41%	0.44%
TOTAL ASSETS
Total Short-Term Assets	$186.1M	$215.1M	$404.5M
Total Long-Term Assets	$1.935B	$1.953B	$1.907B
Total Assets	$2.121B	$2.168B	$2.311B
YoY Change	-2.17%	6.0%	12.27%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$51.10M	$49.10M	$53.90M
YoY Change	4.07%	-6.12%	-16.3%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$99.00M	$100.0M	$100.0M
YoY Change	-1.0%	-21.88%	1566.67%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$158.8M	$156.5M	$163.3M
YoY Change	1.47%	-17.54%	103.62%
LONG-TERM LIABILITIES
Long-Term Debt	$1.081B	$1.115B	$1.311B
YoY Change	-3.1%	4.0%	9.06%
Other Long-Term Liabilities	$18.40M	$35.00M	$11.50M
YoY Change	-47.43%	3.24%	12.75%
Total Long-Term Liabilities	$1.099B	$1.150B	$1.323B
YoY Change	-4.45%	3.98%	9.09%
TOTAL LIABILITIES
Total Short-Term Liabilities	$158.8M	$156.5M	$163.3M
Total Long-Term Liabilities	$1.099B	$1.150B	$1.323B
Total Liabilities	$1.262B	$1.307B	$1.490B
YoY Change	-3.75%	0.84%	14.91%
SHAREHOLDERS EQUITY
Retained Earnings		-$269.9M
YoY Change		36.05%
Common Stock		$659.0K
YoY Change		10.02%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$859.0M	$857.1M	$821.1M
YoY Change
Total Liabilities & Shareholders Equity	$2.121B	$2.168B	$2.311B
YoY Change	-2.17%	6.0%	12.27%

Cashflow Statement

Concept	2011	2010 Q4	2010 Q3
OPERATING ACTIVITIES
Net Income	$104.9M	$10.59M	$6.625M
YoY Change	180.24%	46.28%	-30.48%
Depreciation, Depletion And Amortization	$100.5M	$24.10M	$24.30M
YoY Change	4.99%	0.84%	2.53%
Cash From Operating Activities	$117.6M	$28.40M	$21.60M
YoY Change	5.09%	31.48%	14.29%
INVESTING ACTIVITIES
Capital Expenditures	$315.1M	$98.50M	$5.600M
YoY Change	73.8%	1072.62%	-78.21%
Acquisitions
YoY Change
Other Investing Activities	$376.2M	$49.20M	-$200.0K
YoY Change	435.9%	1194.74%	-101.56%
Cash From Investing Activities	$61.10M	-$49.40M	-$5.800M
YoY Change	-154.97%	973.91%	-55.04%
FINANCING ACTIVITIES
Cash Dividend Paid	$115.0M
YoY Change	5.6%
Common Stock Issuance & Retirement, Net	$0.00
YoY Change	-100.0%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$245.0M	-162.7M	233.3M
YoY Change	-466.8%	1161.24%	-507.16%
NET CHANGE
Cash From Operating Activities	$117.6M	28.40M	21.60M
Cash From Investing Activities	$61.10M	-49.40M	-5.800M
Cash From Financing Activities	-$245.0M	-162.7M	233.3M
Net Change In Cash	-$66.23M	-183.7M	249.1M
YoY Change	-198.03%	-4580.49%	-585.58%
FREE CASH FLOW
Cash From Operating Activities	$117.6M	$28.40M	$21.60M
Capital Expenditures	$315.1M	$98.50M	$5.600M
Free Cash Flow	-$197.5M	-$70.10M	$16.00M
YoY Change	184.68%	-631.06%	-335.29%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2010Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	3400000	USD
CY2009Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	5100000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	3900000	USD
CY2009	us-gaap	Amortization Of Deferred Leasing Fees AmortizationOfDeferredLeasingFees	4000000	USD
CY2011	us-gaap	Amortization Of Deferred Leasing Fees AmortizationOfDeferredLeasingFees	4600000	USD
CY2010	us-gaap	Amortization Of Deferred Leasing Fees AmortizationOfDeferredLeasingFees	4400000	USD
CY2009	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3100000	USD
CY2011	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2300000	USD
CY2010	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2400000	USD
CY2009	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	6957000	USD
CY2010Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	44280000	USD
CY2011Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	53828000	USD
CY2011Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	51145000	USD
CY2010Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	49138000	USD
CY2010Q4	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	6700000	USD
CY2011Q4	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	7600000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1469000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	0	USD
CY2010	us-gaap	Acquisition Costs AcquisitionCosts	1161000	USD
CY2009	us-gaap	Acquisition Costs AcquisitionCosts	788000	USD
CY2011	us-gaap	Acquisition Costs AcquisitionCosts	3607000	USD
CY2011Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1138478000	USD
CY2010Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1127825000	USD
CY2011	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	33436000	USD
CY2010	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	25437000	USD
CY2009	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	27688000	USD
CY2011Q4	us-gaap	Advance Rent AdvanceRent	13739000	USD
CY2010Q4	us-gaap	Advance Rent AdvanceRent	11099000	USD
CY2009	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3500000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5600000	USD
CY2010	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5900000	USD
CY2010Q4	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	7422000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	8921000	USD
CY2010	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	5532000	USD
CY2011	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	3194000	USD
CY2011	us-gaap	Amortization Of Leased Asset AmortizationOfLeasedAsset	15400000	USD
CY2009	us-gaap	Amortization Of Leased Asset AmortizationOfLeasedAsset	7300000	USD
CY2010	us-gaap	Amortization Of Leased Asset AmortizationOfLeasedAsset	7700000	USD
CY2010Q4	us-gaap	Assets Assets	2167881000	USD
CY2011Q4	us-gaap	Assets Assets	2120758000	USD
CY2009Q4	us-gaap	Assets Assets	2045225000	USD
CY2011Q4	us-gaap	Business Acquisition Cost Of Acquired Entity Purchase Price BusinessAcquisitionCostOfAcquiredEntityPurchasePrice	409700000	USD
CY2009Q4	us-gaap	Business Acquisition Cost Of Acquired Entity Purchase Price BusinessAcquisitionCostOfAcquiredEntityPurchasePrice	38000000	USD
CY2010Q4	us-gaap	Business Acquisition Cost Of Acquired Entity Purchase Price BusinessAcquisitionCostOfAcquiredEntityPurchasePrice	73900000	USD
CY2011Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2010Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2010	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	0.60
CY2011	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.57
CY2010	us-gaap	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	1083000	USD
CY2011	us-gaap	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	-1701000	USD
CY2010	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	37517000	USD
CY2011	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	104311000	USD
CY2011	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	308027000	USD
CY2010	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	295767000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	12765000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	78767000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	11203000	USD
CY2008Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	11874000	USD
CY2009	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-671000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-66002000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	67564000	USD
CY2010	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.7313
CY2009	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.7300
CY2011	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.7350
CY2010Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2010Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	65870000	shares
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	66265000	shares
CY2010Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	65870000	shares
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	66265000	shares
CY2010Q4	us-gaap	Common Stock Value CommonStockValue	659000	USD
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	662000	USD
CY2011	us-gaap	Comparability Of Prior Year Financial Data ComparabilityOfPriorYearFinancialData	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:18px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Reclassifications</font></div><div style="line-height:120%;padding-top:6px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Certain prior year amounts have been reclassified from continuing operations to discontinued operations to conform to the current year presentation (see note 3 to the consolidated financial statements).</font></div></div>
CY2010	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	37847000	USD
CY2009	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	41526000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	106847000	USD
CY2009	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	11104000	USD
CY2011	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	13461000	USD
CY2010	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	11903000	USD
CY2011	us-gaap	Cost Of Real Estate Revenue CostOfRealEstateRevenue	97192000	USD
CY2010	us-gaap	Cost Of Real Estate Revenue CostOfRealEstateRevenue	86660000	USD
CY2009	us-gaap	Cost Of Real Estate Revenue CostOfRealEstateRevenue	89289000	USD
CY2009	us-gaap	Cost Of Reimbursable Expense CostOfReimbursableExpense	13132000	USD
CY2011	us-gaap	Cost Of Reimbursable Expense CostOfReimbursableExpense	14786000	USD
CY2010	us-gaap	Cost Of Reimbursable Expense CostOfReimbursableExpense	13528000	USD
CY2009	us-gaap	Costs And Expenses CostsAndExpenses	179956000	USD
CY2010	us-gaap	Costs And Expenses CostsAndExpenses	181132000	USD
CY2011	us-gaap	Costs And Expenses CostsAndExpenses	206217000	USD
CY2011Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	432185000	USD
CY2011Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	463238000	USD
CY2010Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	380360000	USD
CY2011	us-gaap	Debt Instrument Interest Rate Effective Percentage Rate Range Minimum DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum	0.050
CY2011Q4	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.03875
CY2011Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	-2530000	USD
CY2010Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	1100000	USD
CY2011Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	1200000	USD
CY2011Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	12700000	USD
CY2010Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	12100000	USD
CY2010Q4	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	31600000	USD
CY2011Q4	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	33400000	USD
CY2010Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	19500000	USD
CY2011Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	20700000	USD
CY2011Q4	us-gaap	Deferred Finance Costs Gross DeferredFinanceCostsGross	16100000	USD
CY2010Q4	us-gaap	Deferred Finance Costs Gross DeferredFinanceCostsGross	13800000	USD
CY2011Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	8500000	USD
CY2009	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	13348000	USD
CY2010	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	14968000	USD
CY2009	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	17877000	USD
CY2011	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	10153000	USD
CY2010	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	0	USD
CY2011	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	1138000	USD
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.58
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.60
CY2009	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.71
CY2010Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2010Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.24
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.10
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.46
CY2009	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	0	USD
CY2010Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	7100000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Impairment Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses	5700000	USD
CY2009	us-gaap	Depreciation Depreciation	62300000	USD
CY2010	us-gaap	Depreciation Depreciation	64800000	USD
CY2011	us-gaap	Depreciation Depreciation	71200000	USD
CY2009	us-gaap	Depreciation And Amortization DepreciationAndAmortization	77549000	USD
CY2010	us-gaap	Depreciation And Amortization DepreciationAndAmortization	80066000	USD
CY2011	us-gaap	Depreciation And Amortization DepreciationAndAmortization	93297000	USD
CY2009	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	94447000	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	100528000	USD
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	95746000	USD
CY2011Q4	us-gaap	Derivative Financial Instruments Liabilities Fair Value Disclosure DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure	0	USD
CY2010Q4	us-gaap	Derivative Financial Instruments Liabilities Fair Value Disclosure DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure	1500000	USD
CY2011	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	1500000	USD
CY2010	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	300000	USD
CY2011Q4	us-gaap	Development In Process DevelopmentInProcess	43089000	USD
CY2010Q4	us-gaap	Development In Process DevelopmentInProcess	26240000	USD
CY2011	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	97491000	USD
CY2010	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	21599000	USD
CY2010	us-gaap	Dividends Dividends	108949000	USD
CY2009	us-gaap	Dividends Dividends	100221000	USD
CY2011	us-gaap	Dividends Dividends	115045000	USD
CY2010Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.09
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.95
CY2010Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.11
CY2009	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.71
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.58
CY2009	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	13300000	USD
CY2011	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	97491000	USD
CY2009	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	13300000	USD
CY2011	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	97491000	USD
CY2010	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	21600000	USD
CY2009	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	5336000	USD
CY2010	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-9176000	USD
CY2011	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-976000	USD
CY2011	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	97491000	USD
CY2010Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
CY2010	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	21599000	USD
CY2009	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	13348000	USD
CY2009	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	13118000	USD
CY2010	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	14406000	USD
CY2011	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	15728000	USD
CY2011	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	600000	USD
CY2009	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	100000	USD
CY2010	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2010	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
CY2011	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	14526000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-1128000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	992000	USD
CY2009	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	9723000	USD
CY2010Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1418000	USD
CY2010Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-6963000	USD
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.07
CY2010Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.10
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.95
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.46
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.10
CY2010Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.09
CY2010Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2010	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	21600000	USD
CY2009	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
CY2011Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	4431000	USD
CY2010Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	3093000	USD
CY2011Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	2119000	USD
CY2011Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	2707000	USD
CY2010Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	3444000	USD
CY2011Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-10385000	USD
CY2009	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.17
CY2010	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.02
CY2011	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.02
CY2011Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.04
CY2010Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.05
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.07
CY2010Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.11
CY2011Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.16
CY2010Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.05
CY2010Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.02
CY2011Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.03
CY2011	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.02
CY2009	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.17
CY2010	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.02
CY2011Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.04
CY2011Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.16
CY2011Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.03
CY2010Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.11
CY2010Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.04
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.07
CY2010Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.05
CY2010Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.02
CY2009	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	31225000	USD
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	36567000	USD
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	106506000	USD
CY2009	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.54
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	1.60
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.58
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.58
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	1.60
CY2009	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.54
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2009	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-16165000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-3509000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-2294000	USD
CY2010	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	20053000	USD
CY2011	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	14911000	USD
CY2009	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	14576000	USD
CY2010	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	124000	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2009	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	74000	shares
CY2009	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	1400000	USD
CY2010	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	900000	USD
CY2011	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	700000	USD
CY2010	us-gaap	Interest Expense InterestExpense	67229000	USD
CY2011	us-gaap	Interest Expense InterestExpense	66473000	USD
CY2009	us-gaap	Interest Expense InterestExpense	72694000	USD
CY2011	us-gaap	Interest Paid Net InterestPaidNet	63916000	USD
CY2009	us-gaap	Interest Paid Net InterestPaidNet	69292000	USD
CY2010	us-gaap	Interest Paid Net InterestPaidNet	60622000	USD
CY2011Q4	us-gaap	Interest Rate Cash Flow Hedge Liability At Fair Value InterestRateCashFlowHedgeLiabilityAtFairValue	0	USD
CY2010Q4	us-gaap	Interest Rate Cash Flow Hedge Liability At Fair Value InterestRateCashFlowHedgeLiabilityAtFairValue	1500000	USD
CY2011Q4	us-gaap	Land Land	472196000	USD
CY2010Q4	us-gaap	Land Land	381338000	USD
CY2011Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	9400000	USD
CY2011Q4	us-gaap	Liabilities Liabilities	1257926000	USD
CY2010Q4	us-gaap	Liabilities Liabilities	1307023000	USD
CY2010Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2167881000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2120758000	USD
CY2010Q4	us-gaap	Liabilities Of Assets Held For Sale LiabilitiesOfAssetsHeldForSale	23949000	USD
CY2011Q4	us-gaap	Liabilities Of Assets Held For Sale LiabilitiesOfAssetsHeldForSale	0	USD
CY2011Q4	us-gaap	Line Of Credit LineOfCredit	99000000	USD
CY2010Q4	us-gaap	Line Of Credit LineOfCredit	100000000	USD
CY2009Q4	us-gaap	Line Of Credit Facility Amount Outstanding LineOfCreditFacilityAmountOutstanding	128000000	USD
CY2010Q4	us-gaap	Line Of Credit Facility Amount Outstanding LineOfCreditFacilityAmountOutstanding	100000000	USD
CY2011Q4	us-gaap	Line Of Credit Facility Amount Outstanding LineOfCreditFacilityAmountOutstanding	99000000	USD
CY2010	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	112573000	USD
CY2009	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	33656000	USD
CY2011	us-gaap	Line Of Credit Facility Average Outstanding Amount LineOfCreditFacilityAverageOutstandingAmount	160090000	USD
CY2010	us-gaap	Line Of Credit Facility Commitment Fee Percentage LineOfCreditFacilityCommitmentFeePercentage	0.00225
CY2011	us-gaap	Line Of Credit Facility Commitment Fee Percentage LineOfCreditFacilityCommitmentFeePercentage	0.0015
CY2011Q4	us-gaap	Line Of Credit Facility Interest Rate At Period End LineOfCreditFacilityInterestRateAtPeriodEnd	0.0090
CY2010Q4	us-gaap	Line Of Credit Facility Interest Rate At Period End LineOfCreditFacilityInterestRateAtPeriodEnd	0.0253
CY2009Q4	us-gaap	Line Of Credit Facility Interest Rate At Period End LineOfCreditFacilityInterestRateAtPeriodEnd	0.0279
CY2010	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0243
CY2011	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0190
CY2009	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0162
CY2009	us-gaap	Line Of Credit Facility Maximum Amount Outstanding During Period LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod	128000000	USD
CY2011	us-gaap	Line Of Credit Facility Maximum Amount Outstanding During Period LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod	281000000	USD
CY2010	us-gaap	Line Of Credit Facility Maximum Amount Outstanding During Period LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod	141000000	USD
CY2011	us-gaap	Notes Assumed1 NotesAssumed1	-78500000	USD
CY2009Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	337000000	USD
CY2010Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	337000000	USD
CY2011Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	475000000	USD
CY2011Q4	us-gaap	Lines Of Credit Fair Value Disclosure LinesOfCreditFairValueDisclosure	99000000	USD
CY2010Q4	us-gaap	Lines Of Credit Fair Value Disclosure LinesOfCreditFairValueDisclosure	100000000	USD
CY2011Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	156548000	USD
CY2011Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	27000000	USD
CY2011Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	134943000	USD
CY2011Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	22390000	USD
CY2011Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	3724000	USD
CY2011Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	87580000	USD
CY2011	us-gaap	Long Term Purchase Commitment Amount LongTermPurchaseCommitmentAmount	4700000	USD
CY2011Q4	us-gaap	Minority Interest MinorityInterest	3788000	USD
CY2010Q4	us-gaap	Minority Interest MinorityInterest	3778000	USD
CY2010	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	163000	USD
CY2009	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	190000	USD
CY2011	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	2488000	USD
CY2011	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;text-decoration:underline;">NATURE OF BUSINESS</font></div><div style="line-height:120%;padding-top:6px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Washington Real Estate Investment Trust (“We” or “WRIT”), a Maryland real estate investment trust, is a self-administered, self-managed equity real estate investment trust, successor to a trust organized in 1960. Our business consists of the ownership and operation of income-producing real estate properties in the greater Washington Metro region. We own a diversified portfolio of office buildings, medical office buildings, multifamily buildings and retail centers.</font></div><div style="line-height:120%;padding-top:18px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Federal Income Taxes</font></div><div style="line-height:120%;padding-top:6px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We believe that we qualify as a real estate investment trust (“REIT”) under Sections 856-860 of the Internal Revenue Code and intend to continue to qualify as such. To maintain our status as a REIT, we are required to distribute </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">90%</font><font style="font-family:inherit;font-size:10pt;"> of our ordinary taxable income to our shareholders. When selling properties, we have the option of (a) reinvesting the sale proceeds of properties sold, allowing for a deferral of income taxes on the sale, (b) paying out capital gains to the shareholders with no tax to WRIT or (c) treating the capital gains as having been distributed to the shareholders, paying the tax on the gain deemed distributed and allocating the tax paid as a credit to the shareholders. During the three years ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2011</font><font style="font-family:inherit;font-size:10pt;">, we sold the following properties:</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="6" rowspan="1"></td></tr><tr><td width="25%" rowspan="1" colspan="1"></td><td width="35%" rowspan="1" colspan="1"></td><td width="20%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="18%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Disposition Date</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Property</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Type</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">Gain on Sale</font></div><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">(in  thousands)</font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">April 5, 2011</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Dulles Station, Phase I</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Office</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">—</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Various </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Industrial Portfolio </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Office/Industrial</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">97,491</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Total 2011</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">97,491</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;height:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;height:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;height:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;height:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">June 18, 2010</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="padding-bottom:10px;padding-top:10px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Parklawn Portfolio</font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(2)</sup></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Office/Industrial</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7,900</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">December 21, 2010</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Ridges</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Office</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">4,500</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">December 22, 2010</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Ammendale I&II/Amvax</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Industrial</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">9,200</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Total 2010</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">21,600</font></div></td><td style="vertical-align:bottom;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:3px double #000000;" rowspan="1"><div style="text-align:left;font-size:1pt;"><font style="font-family:inherit;font-size:1pt;"> </font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">May 13, 2009</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Avondale</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Multifamily</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">6,700</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">July 23, 2009</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Tech 100 Industrial Park</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Industrial</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">4,100</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">July 31, 2009</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Brandywine Center</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Office</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1,000</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">November 13, 2009</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Crossroads Distribution Center</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Industrial</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1,500</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Total 2009</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">13,300</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:24px;"><font style="font-family:inherit;font-size:10pt;font-style:italic;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup> </font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">The Industrial Portfolio consists of every property in our industrial segment and </font><font style="font-family:inherit;font-size:10pt;color:#000000;font-style:italic;text-decoration:none;">two</font><font style="font-family:inherit;font-size:10pt;font-style:italic;"> office properties (the Crescent and Albemarle Point), and we closed on the sale on three separate dates. On September 2, 2011, we closed on the sale of the two office properties (the Crescent and Albemarle Point) and 8880 Gorman Road, Dulles South IV, Fullerton Business Center, Hampton Overlook, Alban Business Center, Pickett Industrial Park, Northern Virginia Industrial Park I, 270 Technology Park, Fullerton Industrial Center, Sully Square, 9950 Business Parkway, Hampton South and 8900 Telegraph Road. On October 3, 2011, we closed the sale of Northern Virginia Industrial Park II. On November 1, 2011, we closed on the sale of 6100 Columbia Park Road and Dulles Business Park I and II.</font></div></td></tr></table><div style="line-height:120%;padding-left:4px;text-align:justify;padding-left:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:24px;"><font style="font-family:inherit;font-size:10pt;font-style:italic;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(2)</sup> </font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">The Parklawn Portfolio consists of three office properties (Parklawn Plaza, Lexington Building and Saratoga Building) and one industrial property (Charleston Business Center).</font></div></td></tr></table><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">A portion of the sales proceeds were reinvested in replacement properties, with the remainder paid out to the shareholders.</font></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Generally, and subject to our ongoing qualification as a REIT, </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">no</font><font style="font-family:inherit;font-size:10pt;"> provisions for income taxes are necessary except for taxes on undistributed REIT taxable income and taxes on the income generated by our taxable REIT subsidiaries (“TRS's”). Our TRS's are subject to corporate federal and state income tax on their taxable income at regular statutory rates, or as calculated under the alternative minimum tax, as appropriate. On April 5, 2011, we settled on the sale of Dulles Station, Phase I, an office property held by one of our TRS's. After the application of available net operating loss carryforwards, we recognized </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$1.1 million</font><font style="font-family:inherit;font-size:10pt;"> in current net federal and state income tax liabilities during 2011 in connection with the sale and operations of the entities. </font></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">During the fourth quarter of 2011 we recognized a </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$14.5 million</font><font style="font-family:inherit;font-size:10pt;"> impairment charge at Dulles Station, Phase II, a development property held by one of our TRS's (see note 3 to the consolidated financial statements). The impairment charge created a deferred tax asset of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$5.7 million</font><font style="font-family:inherit;font-size:10pt;"> at this TRS, but we have determined that it is more likely than not that this deferred tax asset will not be realized. We have therefore recorded a valuation allowance for the full amount of the deferred tax asset related to the impairment charge at Dulles Station, Phase II. </font></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">As of December 31, 2011, our TRS's had a net deferred tax asset of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$0.1 million</font><font style="font-family:inherit;font-size:10pt;"> and a net deferred tax liability of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$0.5 million</font><font style="font-family:inherit;font-size:10pt;">, primarily related to temporary differences in the timing of the recognition of revenue, amortization and depreciation. There were no material income tax provisions or material net deferred income tax items for our TRS's for the years ended December 31, 2010 and 2009.</font></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The following is a breakdown of the taxable percentage of our dividends for </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2011, 2010 and 2009</font><font style="font-family:inherit;font-size:10pt;">, respectively (unaudited):</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="9" rowspan="1"></td></tr><tr><td width="53%" rowspan="1" colspan="1"></td><td width="14%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="14%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td><td width="14%" rowspan="1" colspan="1"></td><td width="1%" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">2011</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">2010</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">2009</font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Ordinary income</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">60</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">55</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">75</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Return of capital</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">17</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">31</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">17</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Qualified dividends</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">5</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">—</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">—</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Unrecaptured Section 1250 gain</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">13</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">11</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Capital gain</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">5</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">3</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr></table></div></div></div>
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-244955000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	66781000	USD
CY2009	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-90763000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-111150000	USD
CY2009	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-12809000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	61098000	USD
CY2009	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	102901000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	111933000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	117855000	USD
CY2009	us-gaap	Net Income Loss NetIncomeLoss	40745000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	37426000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	104884000	USD
CY2010Q1	us-gaap	Net Income Loss NetIncomeLoss	5216000	USD
CY2011Q1	us-gaap	Net Income Loss NetIncomeLoss	4665000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	63008000	USD
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	30689000	USD
CY2010Q4	us-gaap	Net Income Loss NetIncomeLoss	10591000	USD
CY2010Q3	us-gaap	Net Income Loss NetIncomeLoss	6625000	USD
CY2010Q2	us-gaap	Net Income Loss NetIncomeLoss	14994000	USD
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	6522000	USD
CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	494000	USD
CY2010	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	133000	USD
CY2009	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	203000	USD
CY2011	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	-2004000	USD
CY2009	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-66870000	USD
CY2011	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-84438000	USD
CY2010	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-76366000	USD
CY2009	us-gaap	Notes Assumed1 NotesAssumed1	0	USD
CY2010	us-gaap	Notes Assumed1 NotesAssumed1	0	USD
CY2010Q4	us-gaap	Notes Payable NotesPayable	753587000	USD
CY2011Q4	us-gaap	Notes Payable NotesPayable	657470000	USD
CY2011Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	713797000	USD
CY2010Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	785637000	USD
CY2011Q4	us-gaap	Notes Receivable Net NotesReceivableNet	7300000	USD
CY2010Q4	us-gaap	Notes Receivable Net NotesReceivableNet	8100000	USD
CY2011Q4	us-gaap	Number Of Units In Real Estate Property NumberOfUnitsInRealEstateProperty	2540	units
CY2009	us-gaap	Operating Income Loss OperatingIncomeLoss	76593000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	77358000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	83310000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Receivable OperatingLeasesFutureMinimumPaymentsReceivable	1049600000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Current OperatingLeasesFutureMinimumPaymentsReceivableCurrent	211300000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Five Years OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears	102100000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Four Years OperatingLeasesFutureMinimumPaymentsReceivableInFourYears	134700000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Three Years OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears	160200000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Two Years OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears	191100000	USD
CY2011Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Thereafter OperatingLeasesFutureMinimumPaymentsReceivableThereafter	250200000	USD
CY2011Q4	us-gaap	Other Assets Held For Sale Current OtherAssetsHeldForSaleCurrent	0	USD
CY2010Q4	us-gaap	Other Assets Held For Sale Current OtherAssetsHeldForSaleCurrent	27968000	USD
CY2010	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease	-288000	USD
CY2009	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease	-578000	USD
CY2011	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease	-1469000	USD
CY2010	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	1988000	USD
CY2009	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	4033000	USD
CY2011	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	3155000	USD
CY2010	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	7000	USD
CY2011	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	0	USD
CY2009	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	71000	USD
CY2010	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1193000	USD
CY2009	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1205000	USD
CY2011	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1144000	USD
CY2010	us-gaap	Owned Property Management Costs OwnedPropertyManagementCosts	7312000	USD
CY2009	us-gaap	Owned Property Management Costs OwnedPropertyManagementCosts	6237000	USD
CY2011	us-gaap	Owned Property Management Costs OwnedPropertyManagementCosts	8942000	USD
CY2009	us-gaap	Payment Of Financing And Stock Issuance Costs PaymentOfFinancingAndStockIssuanceCosts	847000	USD
CY2010	us-gaap	Payment Of Financing And Stock Issuance Costs PaymentOfFinancingAndStockIssuanceCosts	2450000	USD
CY2011	us-gaap	Payment Of Financing And Stock Issuance Costs PaymentOfFinancingAndStockIssuanceCosts	3905000	USD
CY2010	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	25045000	USD
CY2009	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	27337000	USD
CY2011	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	32815000	USD
CY2011	us-gaap	Payments Of Dividends PaymentsOfDividends	115045000	USD
CY2010	us-gaap	Payments Of Dividends PaymentsOfDividends	108949000	USD
CY2009	us-gaap	Payments Of Dividends PaymentsOfDividends	100221000	USD
CY2011	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	2488000	USD
CY2009	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	190000	USD
CY2010	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	163000	USD
CY2011	us-gaap	Payments To Acquire Buildings PaymentsToAcquireBuildings	219600000	USD
CY2010	us-gaap	Payments To Acquire Buildings PaymentsToAcquireBuildings	93300000	USD
CY2009	us-gaap	Payments To Acquire Buildings PaymentsToAcquireBuildings	18600000	USD
CY2011	us-gaap	Payments To Acquire Land Held For Use PaymentsToAcquireLandHeldForUse	90900000	USD
CY2009	us-gaap	Payments To Acquire Land Held For Use PaymentsToAcquireLandHeldForUse	1300000	USD
CY2010	us-gaap	Payments To Acquire Land Held For Use PaymentsToAcquireLandHeldForUse	38200000	USD
CY2011	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	621000	USD
CY2009	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	351000	USD
CY2010	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	392000	USD
CY2011	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	281701000	USD
CY2009	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	19828000	USD
CY2010	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	155881000	USD
CY2010	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	1337000	USD
CY2009	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	2135000	USD
CY2011	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	25929000	USD
CY2010Q4	us-gaap	Postemployment Benefits Liability Current And Noncurrent PostemploymentBenefitsLiabilityCurrentAndNoncurrent	1600000	USD
CY2011Q4	us-gaap	Postemployment Benefits Liability Current And Noncurrent PostemploymentBenefitsLiabilityCurrentAndNoncurrent	1500000	USD
CY2010Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	92040000	USD
CY2011Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	120601000	USD
CY2009	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	160915000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2010	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	168880000	USD
CY2011	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2010	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2009	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	37500000	USD
CY2009	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	USD
CY2010	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	247998000	USD
CY2011	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	USD
CY2010	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	68800000	USD
CY2011	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	261000000	USD
CY2009	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	214500000	USD
CY2009	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	2479000	USD
CY2010	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	5286000	USD
CY2011	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	5043000	USD
CY2010	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	71505000	USD
CY2011	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	402164000	USD
CY2009	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	36842000	USD
CY2011	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1292000	USD
CY2010	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	3963000	USD
CY2009	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	45000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	105378000	USD
CY2009	us-gaap	Profit Loss ProfitLoss	40948000	USD
CY2010	us-gaap	Profit Loss ProfitLoss	37559000	USD
CY2011Q2	us-gaap	Profit Loss ProfitLoss	6556000	USD
CY2010Q3	us-gaap	Profit Loss ProfitLoss	6658000	USD
CY2010Q4	us-gaap	Profit Loss ProfitLoss	10615000	USD
CY2010Q2	us-gaap	Profit Loss ProfitLoss	15021000	USD
CY2011Q3	us-gaap	Profit Loss ProfitLoss	63036000	USD
CY2010Q1	us-gaap	Profit Loss ProfitLoss	5265000	USD
CY2011Q4	us-gaap	Profit Loss ProfitLoss	31098000	USD
CY2011Q1	us-gaap	Profit Loss ProfitLoss	4688000	USD
CY2011	us-gaap	Property Plant And Equipment Useful Life Maximum PropertyPlantAndEquipmentUsefulLifeMaximum	50
CY2011	us-gaap	Property Plant And Equipment Useful Life Minimum PropertyPlantAndEquipmentUsefulLifeMinimum	3
CY2009	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	6889000	USD
CY2011	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	4005000	USD
CY2010	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	4150000	USD
CY2010Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	538786000	USD
CY2008Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	406241000	USD
CY2009Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	475245000	USD
CY2011Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	535732000	USD
CY2009	us-gaap	Real Estate Accumulated Depreciation Depreciation Expense RealEstateAccumulatedDepreciationDepreciationExpense	82022000	USD
CY2011	us-gaap	Real Estate Accumulated Depreciation Depreciation Expense RealEstateAccumulatedDepreciationDepreciationExpense	84167000	USD
CY2010	us-gaap	Real Estate Accumulated Depreciation Depreciation Expense RealEstateAccumulatedDepreciationDepreciationExpense	83302000	USD
CY2011	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	-1291000	USD
CY2009	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	0	USD
CY2010	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	0	USD
CY2011	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	84282000	USD
CY2009	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	10567000	USD
CY2010	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	18895000	USD
CY2011Q4	us-gaap	Real Estate And Accumulated Depreciation Accumulated Depreciation RealEstateAndAccumulatedDepreciationAccumulatedDepreciation	535732000	USD
CY2011Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	1940463000	USD
CY2011Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	509409000	USD
CY2011Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovements	2449872000	USD
CY2011Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionImprovements	465214000	USD
CY2009	us-gaap	Real Estate And Accumulated Depreciation Description Of Property RealEstateAndAccumulatedDepreciationDescriptionOfProperty	Total 2009
CY2011	us-gaap	Real Estate And Accumulated Depreciation Description Of Property RealEstateAndAccumulatedDepreciationDescriptionOfProperty	Total 2011
CY2010	us-gaap	Real Estate And Accumulated Depreciation Description Of Property RealEstateAndAccumulatedDepreciationDescriptionOfProperty	Total 2010
CY2011Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	1470262000	USD
CY2011Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	514396000	USD
CY2010	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	66248000	USD
CY2009	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	33219000	USD
CY2011	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	364235000	USD
CY2011Q4	us-gaap	Real Estate Federal Income Tax Basis RealEstateFederalIncomeTaxBasis	2148544000	USD
CY2008Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	2326646000	USD
CY2010Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	2443127000	USD
CY2009Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	2341461000	USD
CY2011Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	2449872000	USD
CY2010Q4	us-gaap	Real Estate Heldforsale RealEstateHeldforsale	286842000	USD
CY2011Q4	us-gaap	Real Estate Heldforsale RealEstateHeldforsale	0	USD
CY2009	us-gaap	Real Estate Improvements RealEstateImprovements	30399000	USD
CY2010	us-gaap	Real Estate Improvements RealEstateImprovements	28196000	USD
CY2011	us-gaap	Real Estate Improvements RealEstateImprovements	36386000	USD
CY2010Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	460678000	USD
CY2011Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	535732000	USD
CY2010Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	2051936000	USD
CY2011Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	2406783000	USD
CY2010Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	1617498000	USD
CY2011Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	1914140000	USD
CY2011Q4	us-gaap	Real Estate Investments RealEstateInvestments	1871051000	USD
CY2010Q4	us-gaap	Real Estate Investments RealEstateInvestments	1591258000	USD
CY2010	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	140584000	USD
CY2009	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	20086000	USD
CY2011	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	352658000	USD
CY2010	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	258490000	USD
CY2011	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	289527000	USD
CY2009	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	256549000	USD
CY2011Q1	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	69204000	USD
CY2010Q1	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	64007000	USD
CY2011Q3	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	71931000	USD
CY2010Q2	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	64087000	USD
CY2010Q4	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	65364000	USD
CY2011Q4	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	76708000	USD
CY2010Q3	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	65032000	USD
CY2011Q2	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	71684000	USD
CY2010	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	25044000	USD
CY2011	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	27238000	USD
CY2009	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	27072000	USD
CY2010Q4	us-gaap	Rental Properties RentalProperties	1670598000	USD
CY2011Q4	us-gaap	Rental Properties RentalProperties	1934587000	USD
CY2010	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	96800000	USD
CY2011	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	262000000	USD
CY2009	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	153500000	USD
CY2009	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	54030000	USD
CY2010	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	25985000	USD
CY2011	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	32331000	USD
CY2009	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	197414000	USD
CY2011	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	96521000	USD
CY2010	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	193799000	USD
CY2010Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	20486000	USD
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	19424000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-280096000	USD
CY2010Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-269935000	USD
CY2011Q4	us-gaap	Secured Debt SecuredDebt	427710000	USD
CY2010Q4	us-gaap	Secured Debt SecuredDebt	361860000	USD
CY2010Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	7390000	USD
CY2011Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	8862000	USD
CY2009	us-gaap	Share Based Compensation ShareBasedCompensation	3085000	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	4931000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	4321000	USD
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	4900000	USD
CY2009	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	1900000	USD
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	2100000	USD
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.581
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2009	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0.00
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0.00
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.012
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	314250	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	89106	shares
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	145950	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	27.69
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	25.39
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	26.74
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	300000	USD
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	1000000	USD
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	25.29
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	16.34
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	24.11
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	-4000	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	-5763	shares
CY2009	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	0	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	24.85
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0.00
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	28.23
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0.00
CY2008Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	317000	shares
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	314250	shares
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	145950	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	89106	shares
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	25.39
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	27.69
CY2008Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	25.31
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	26.74
CY2011Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	0	USD
CY2010	us-gaap	Square Footage Of Real Estate Property SquareFootageOfRealEstateProperty	638000000
CY2011	us-gaap	Square Footage Of Real Estate Property SquareFootageOfRealEstateProperty	3272000000
CY2009	us-gaap	Square Footage Of Real Estate Property SquareFootageOfRealEstateProperty	456000000
CY2011	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	200000	shares
CY2009	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	100000	shares
CY2010	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	200000	shares
CY2009	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	-2750	shares
CY2011	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	-51081	shares
CY2010	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	-164300	shares
CY2010	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	5286000	USD
CY2009	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	2479000	USD
CY2011	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	5043000	USD
CY2010	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	168880000	USD
CY2009	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	160915000	USD
CY2010	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	4931000	USD
CY2009	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	4084000	USD
CY2011	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	4321000	USD
CY2010	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	3963000	USD
CY2009	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	45000	USD
CY2011	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1292000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	857080000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	859044000	USD
CY2010Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	860858000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	862832000	USD
CY2009Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	749063000	USD
CY2008Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	640425000	USD
CY2010	us-gaap	Tenant Reimbursements TenantReimbursements	24500000	USD
CY2009	us-gaap	Tenant Reimbursements TenantReimbursements	27600000	USD
CY2011	us-gaap	Tenant Reimbursements TenantReimbursements	26100000	USD
CY2011Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums Other UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiumsOther	4475000	USD
CY2011	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	0	USD
CY2009	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	26000	USD
CY2010	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	4000	USD
CY2011	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:18px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Use of Estimates in the Financial Statements</font></div><div style="line-height:120%;padding-top:6px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</font></div></div>
CY2010	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	18233000	USD
CY2011	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	19960000	USD
CY2009	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	18866000	USD
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	62264000	shares
CY2009	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	56968000	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	65982000	shares
CY2009	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	56894000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	65982000	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62140000	shares
CY2011	wre	Adjusted Income From Discontinuing Operations Attributable To Controlling Interests AdjustedIncomeFromDiscontinuingOperationsAttributableToControllingInterests	105300000	USD
CY2009	wre	Adjusted Income From Discontinuing Operations Attributable To Controlling Interests AdjustedIncomeFromDiscontinuingOperationsAttributableToControllingInterests	30937000	USD
CY2010	wre	Adjusted Income From Discontinuing Operations Attributable To Controlling Interests AdjustedIncomeFromDiscontinuingOperationsAttributableToControllingInterests	36294000	USD
CY2010	wre	Adjusted Income Loss From Continuing Operations AdjustedIncomeLossFromContinuingOperations	988000	USD
CY2009	wre	Adjusted Income Loss From Continuing Operations AdjustedIncomeLossFromContinuingOperations	9697000	USD
CY2011	wre	Adjusted Income Loss From Continuing Operations AdjustedIncomeLossFromContinuingOperations	-1128000	USD
CY2009	wre	Adjusted Net Income Attributable To Controlling Interests Income Numerator AdjustedNetIncomeAttributableToControllingInterestsIncomeNumerator	40634000	USD
CY2011	wre	Adjusted Net Income Attributable To Controlling Interests Income Numerator AdjustedNetIncomeAttributableToControllingInterestsIncomeNumerator	104172000	USD
CY2010	wre	Adjusted Net Income Attributable To Controlling Interests Income Numerator AdjustedNetIncomeAttributableToControllingInterestsIncomeNumerator	37282000	USD
CY2009	wre	Adjustment Gains Losses On Extinguishment Of Debt AdjustmentGainsLossesOnExtinguishmentOfDebt	5336000	USD
CY2011	wre	Adjustment Gains Losses On Extinguishment Of Debt AdjustmentGainsLossesOnExtinguishmentOfDebt	0	USD
CY2010	wre	Adjustment Gains Losses On Extinguishment Of Debt AdjustmentGainsLossesOnExtinguishmentOfDebt	-9176000	USD
CY2011	wre	Aggregate Insurance Limit For Terrorism Losses AggregateInsuranceLimitForTerrorismLosses	100000000000	USD
CY2010Q4	wre	Carrying Amount Mortgaged Properties CarryingAmountMortgagedProperties	570500000	USD
CY2011Q4	wre	Carrying Amount Mortgaged Properties CarryingAmountMortgagedProperties	678900000	USD
CY2011Q1	wre	Closing Share Price Date Of Grant ClosingSharePriceDateOfGrant	30.91
CY2011Q4	wre	Common Stock Capital Shares Reserved For Future Issuances Value CommonStockCapitalSharesReservedForFutureIssuancesValue	250000000	USD
CY2011	wre	Credits Received At Settlement CreditsReceivedAtSettlement	1300000	USD
CY2010	wre	Credits Received At Settlement CreditsReceivedAtSettlement	500000	USD
CY2011	wre	Current Service Cost Current Executives CurrentServiceCostCurrentExecutives	300000	USD
CY2009	wre	Current Service Cost Current Executives CurrentServiceCostCurrentExecutives	300000	USD
CY2010	wre	Current Service Cost Current Executives CurrentServiceCostCurrentExecutives	300000	USD
CY2010	wre	Current Service Cost Prior Executive CurrentServiceCostPriorExecutive	100000	USD
CY2011	wre	Current Service Cost Prior Executive CurrentServiceCostPriorExecutive	100000	USD
CY2009	wre	Current Service Cost Prior Executive CurrentServiceCostPriorExecutive	100000	USD
CY2009	wre	Deferred Leasing Incentives Amortization DeferredLeasingIncentivesAmortization	100000	USD
CY2010	wre	Deferred Leasing Incentives Amortization DeferredLeasingIncentivesAmortization	200000	USD
CY2011	wre	Deferred Leasing Incentives Amortization DeferredLeasingIncentivesAmortization	700000	USD
CY2010	wre	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	400000	USD
CY2011	wre	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	500000	USD
CY2009	wre	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	400000	USD
CY2011Q4	wre	Fair Value Assets Measured On Recurring Basis Supplemental Executive Retirement Program FairValueAssetsMeasuredOnRecurringBasisSupplementalExecutiveRetirementProgram	1700000	USD
CY2010Q4	wre	Fair Value Assets Measured On Recurring Basis Supplemental Executive Retirement Program FairValueAssetsMeasuredOnRecurringBasisSupplementalExecutiveRetirementProgram	1700000	USD
CY2010Q4	wre	Finite Lived Intangible Liabilities Net Lease Accumulated Amortization FiniteLivedIntangibleLiabilitiesNetLeaseAccumulatedAmortization	16100000	USD
CY2011Q4	wre	Finite Lived Intangible Liabilities Net Lease Accumulated Amortization FiniteLivedIntangibleLiabilitiesNetLeaseAccumulatedAmortization	19300000	USD
CY2011Q4	wre	Finite Lived Intangible Liabilities Net Lease Gross FiniteLivedIntangibleLiabilitiesNetLeaseGross	32000000	USD
CY2010Q4	wre	Finite Lived Intangible Liabilities Net Lease Gross FiniteLivedIntangibleLiabilitiesNetLeaseGross	29800000	USD
CY2011Q4	wre	Finite Lived Intangible Liabilities Net Lease Net FiniteLivedIntangibleLiabilitiesNetLeaseNet	12700000	USD
CY2010Q4	wre	Finite Lived Intangible Liabilities Net Lease Net FiniteLivedIntangibleLiabilitiesNetLeaseNet	13700000	USD
CY2010	wre	Impairment Gross Asset ImpairmentGrossAsset	0	USD
CY2011	wre	Impairment Gross Asset ImpairmentGrossAsset	-16416000	USD
CY2009	wre	Impairment Gross Asset ImpairmentGrossAsset	0	USD
CY2011Q4	wre	Insurance Provider Covered Terrorism Losses Percent InsuranceProviderCoveredTerrorismLossesPercent	0.10
CY2010Q4	wre	Leasing Commissions Absorption Costs LeasingCommissionsAbsorptionCosts	15400000	USD
CY2011Q4	wre	Leasing Commissions Absorption Costs LeasingCommissionsAbsorptionCosts	29700000	USD
CY2009Q4	wre	Leasing Commissions Absorption Costs LeasingCommissionsAbsorptionCosts	0	USD
CY2011	wre	Line Of Credit Extension Term LineOfCreditExtensionTerm	1
CY2011Q4	wre	Minimum Buildings Or Land Collateral For Mortgage Notes Payable MinimumBuildingsOrLandCollateralForMortgageNotesPayable	1
CY2009Q4	wre	Net Lease Intangible Assets NetLeaseIntangibleAssets	0	USD
CY2011Q4	wre	Net Lease Intangible Assets NetLeaseIntangibleAssets	6800000	USD
CY2010Q4	wre	Net Lease Intangible Assets NetLeaseIntangibleAssets	1400000	USD
CY2011Q4	wre	Net Lease Intangible Liabilities NetLeaseIntangibleLiabilities	-2500000	USD
CY2009Q4	wre	Net Lease Intangible Liabilities NetLeaseIntangibleLiabilities	0	USD
CY2010Q4	wre	Net Lease Intangible Liabilities NetLeaseIntangibleLiabilities	-1500000	USD
CY2011Q4	wre	Net Rentable Square Feet NetRentableSquareFeet	10692000	sqft
CY2011Q3	wre	Number Of Office Assets NumberOfOfficeAssets	2
CY2011Q3	wre	Number Of Purchase And Sale Agreements Entered NumberOfPurchaseAndSaleAgreementsEntered	5
CY2011Q4	wre	Number Of Reportable Segments NumberOfReportableSegments	4
CY2011	wre	Operating Income Loss Net OperatingIncomeLossNet	192335000	USD
CY2010	wre	Operating Income Loss Net OperatingIncomeLossNet	171830000	USD
CY2009	wre	Operating Income Loss Net OperatingIncomeLossNet	167260000	USD
CY2011	wre	Operating Lease Term Average Maximum OperatingLeaseTermAverageMaximum	P5Y
CY2011	wre	Operating Lease Term Average Minimum OperatingLeaseTermAverageMinimum	P3Y
CY2011Q2	wre	Percentage Of Capital Contribution Through Debt PercentageOfCapitalContributionThroughDebt	0.70
CY2011	wre	Percentage Of Distribution Of Ordinary Taxable Income PercentageOfDistributionOfOrdinaryTaxableIncome	0.90
CY2010	wre	Percentage Of Dividends Paid On Capital Gain PercentageOfDividendsPaidOnCapitalGain	0.03
CY2011	wre	Percentage Of Dividends Paid On Capital Gain PercentageOfDividendsPaidOnCapitalGain	0.05
CY2009	wre	Percentage Of Dividends Paid On Capital Gain PercentageOfDividendsPaidOnCapitalGain	0.01
CY2009	wre	Percentage Of Dividends Paid On Ordinary Income PercentageOfDividendsPaidOnOrdinaryIncome	0.75
CY2011	wre	Percentage Of Dividends Paid On Ordinary Income PercentageOfDividendsPaidOnOrdinaryIncome	0.60
CY2010	wre	Percentage Of Dividends Paid On Ordinary Income PercentageOfDividendsPaidOnOrdinaryIncome	0.55
CY2010	wre	Percentage Of Dividends Paid On Return Of Capital PercentageOfDividendsPaidOnReturnOfCapital	0.31
CY2011	wre	Percentage Of Dividends Paid On Return Of Capital PercentageOfDividendsPaidOnReturnOfCapital	0.17
CY2009	wre	Percentage Of Dividends Paid On Return Of Capital PercentageOfDividendsPaidOnReturnOfCapital	0.17
CY2010	wre	Percentage Of Dividends Paid On Unrecaptured Section1250 Gain PercentageOfDividendsPaidOnUnrecapturedSection1250Gain	0.11
CY2009	wre	Percentage Of Dividends Paid On Unrecaptured Section1250 Gain PercentageOfDividendsPaidOnUnrecapturedSection1250Gain	0.07
CY2011	wre	Percentage Of Dividends Paid On Unrecaptured Section1250 Gain PercentageOfDividendsPaidOnUnrecapturedSection1250Gain	0.13
CY2011	wre	Percentage Of Dividends Paid Qualified Dividends PercentageOfDividendsPaidQualifiedDividends	0.05
CY2010	wre	Percentage Of Dividends Paid Qualified Dividends PercentageOfDividendsPaidQualifiedDividends	0.00
CY2009	wre	Percentage Of Dividends Paid Qualified Dividends PercentageOfDividendsPaidQualifiedDividends	0.00
CY2010	wre	Percentage Rents PercentageRents	100000	USD
CY2009	wre	Percentage Rents PercentageRents	200000	USD
CY2011	wre	Percentage Rents PercentageRents	200000	USD
CY2010	wre	Property Administration PropertyAdministration	8652000	USD
CY2009	wre	Property Administration PropertyAdministration	8845000	USD
CY2011	wre	Property Administration PropertyAdministration	9650000	USD
CY2010Q4	wre	Real Estate Held For Sale Gross RealEstateHeldForSaleGross	364950000	USD
CY2011Q4	wre	Real Estate Held For Sale Gross RealEstateHeldForSaleGross	0	USD
CY2011	wre	Real Estate Impairment Including Discontinued Operations RealEstateImpairmentIncludingDiscontinuedOperations	15125000	USD
CY2009	wre	Real Estate Impairment Including Discontinued Operations RealEstateImpairmentIncludingDiscontinuedOperations	0	USD
CY2010	wre	Real Estate Impairment Including Discontinued Operations RealEstateImpairmentIncludingDiscontinuedOperations	0	USD
CY2011	wre	Stock Options Expiration In Years StockOptionsExpirationInYears	10
CY2011	wre	Stock Options Vesting Percentage After Year One StockOptionsVestingPercentageAfterYearOne	0.50
CY2011Q4	wre	Tenant Origination Costs TenantOriginationCosts	15700000	USD
CY2009Q4	wre	Tenant Origination Costs TenantOriginationCosts	0	USD
CY2010Q4	wre	Tenant Origination Costs TenantOriginationCosts	9100000	USD
CY2010	wre	Total Property Purchase Price TotalPropertyPurchasePrice	155900000	USD
CY2009	wre	Total Property Purchase Price TotalPropertyPurchasePrice	19900000	USD
CY2011	wre	Total Property Purchase Price TotalPropertyPurchasePrice	281700000	USD
CY2011	wre	Trustee Share Based Compensation TrusteeShareBasedCompensation	55000	USD
CY2009	wre	Trustee Share Based Compensation TrusteeShareBasedCompensation	55000	USD
CY2010	wre	Trustee Share Based Compensation TrusteeShareBasedCompensation	55000	USD
CY2011Q4	wre	Us Covered Terrorism Losses Percent USCoveredTerrorismLossesPercent	0.85
CY2010	wre	Undistributed Earnings Allocated To Participating Securites Discontinued Operations UndistributedEarningsAllocatedToParticipatingSecuritesDiscontinuedOperations	140000	USD
CY2009	wre	Undistributed Earnings Allocated To Participating Securites Discontinued Operations UndistributedEarningsAllocatedToParticipatingSecuritesDiscontinuedOperations	85000	USD
CY2011	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2011
CY2011	dei	Document Period End Date DocumentPeriodEndDate	2011-12-31
CY2011	wre	Undistributed Earnings Allocated To Participating Securites Discontinued Operations UndistributedEarningsAllocatedToParticipatingSecuritesDiscontinuedOperations	712000	USD
CY2010	wre	Weighted Average Issue Price Dividend Reinvestment Program WeightedAverageIssuePriceDividendReinvestmentProgram	30.36
	wre	Weighted Average Issue Price Dividend Reinvestment Program WeightedAverageIssuePriceDividendReinvestmentProgram	29.97
CY2009	wre	Weighted Average Issue Price Dividend Reinvestment Program WeightedAverageIssuePriceDividendReinvestmentProgram	28.34
CY2011	wre	Write Down Of Real Estate Disposed Of WriteDownOfRealEstateDisposedOf	-1648000	USD
CY2010	wre	Write Down Of Real Estate Disposed Of WriteDownOfRealEstateDisposedOf	-866000	USD
CY2009	wre	Write Down Of Real Estate Disposed Of WriteDownOfRealEstateDisposedOf	-2451000	USD
CY2011	wre	Write Offs Of Accounts Receivable WriteOffsOfAccountsReceivable	2400000	USD
CY2010	wre	Write Offs Of Accounts Receivable WriteOffsOfAccountsReceivable	1200000	USD
CY2009	wre	Write Offs Of Accounts Receivable WriteOffsOfAccountsReceivable	3800000	USD
CY2011	dei	Amendment Flag AmendmentFlag	false
CY2011	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2011	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2011	dei	Document Type DocumentType	10-K
CY2011	dei	Entity Central Index Key EntityCentralIndexKey	0000104894
CY2012Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	66271263	shares
CY2011	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2011	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2011Q2	dei	Entity Public Float EntityPublicFloat	2133692094	USD
CY2011	dei	Entity Registrant Name EntityRegistrantName	WASHINGTON REAL ESTATE INVESTMENT TRUST
CY2011	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2011	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes

Files In Submission

Name	View Source	Status
0000104894-12-000029-index-headers.html	Edgar Link	pending
0000104894-12-000029-index.html	Edgar Link	pending
0000104894-12-000029.txt	Edgar Link	pending
0000104894-12-000029-xbrl.zip	Edgar Link	pending
exhibit1031.htm	Edgar Link	pending
exhibit1032.htm	Edgar Link	pending
exhibit1033.htm	Edgar Link	pending
exhibit1034.htm	Edgar Link	pending
exhibit1035.htm	Edgar Link	pending
exhibit1036.htm	Edgar Link	pending
exhibit1037.htm	Edgar Link	pending
exhibit12-ratios.htm	Edgar Link	pending
exhibit21.htm	Edgar Link	pending
exhibit231.htm	Edgar Link	pending
exhibit24-powerofattorney.htm	Edgar Link	pending
exhibit311.htm	Edgar Link	pending
exhibit312.htm	Edgar Link	pending
exhibit313.htm	Edgar Link	pending
exhibit32.htm	Edgar Link	pending
exhibit421.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	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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R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
wre-20111231.xml	Edgar Link	completed
wre-20111231.xsd	Edgar Link	pending
wre-20111231_cal.xml	Edgar Link	unprocessable
wre-20111231_def.xml	Edgar Link	unprocessable
wre-20111231_lab.xml	Edgar Link	unprocessable
wre-20111231_pre.xml	Edgar Link	unprocessable
wre10-kx12312011.htm	Edgar Link	pending
writlogocmyka01.jpg	Edgar Link	pending

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$ELME
Elme Communities Stock $elme

2011 Form 10-K Financial Statement

#000010489412000029 Filed on February 27, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ELME Elme Communities Stock $elme

2011 Form 10-K Financial Statement

#000010489412000029 Filed on February 27, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ELME
Elme Communities Stock $elme