$UDR
UDR, Inc. Stock $udr

$udr Overview Financials Valuation SEC Filings Company Website

2021 Form 10-K Financial Statement

#000007420822000010 Filed on February 15, 2022

Income Statement

Concept	2021	2020 Q4	2020
Revenue	$1.291B	$302.4M	$1.241B
YoY Change	4.0%	-0.79%	7.72%
Cost Of Revenue	$447.8M	$105.0M	$410.0M
YoY Change	9.21%	9.15%	15.14%
Gross Profit	$843.0M	$197.4M	$831.1M
YoY Change	1.43%	-5.37%	4.4%
Gross Profit Margin	65.31%	65.28%	66.96%
Selling, General & Admin	$65.84M	$12.00M	$57.80M
YoY Change	13.91%	-17.24%	-0.34%
% of Gross Profit	7.81%	6.08%	6.95%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$619.8M	$148.2M	$618.6M
YoY Change	0.19%	2.07%	21.8%
% of Gross Profit	73.53%	75.08%	74.43%
Operating Expenses	$707.3M	$166.3M	$699.2M
YoY Change	1.16%	2.34%	20.59%
Operating Profit	$268.0M	$31.10M	$249.1M
YoY Change	7.57%	-32.54%	12.69%
Interest Expense	$186.3M	-$59.00M	$202.7M
YoY Change	-8.11%	-197.52%	18.6%
% of Operating Profit	69.51%	-189.71%	81.37%
Other Income/Expense, Net	$15.09M		$6.274M
YoY Change	140.44%		-59.27%
Pretax Income	$162.4M	$29.20M	$71.52M
YoY Change	127.13%	-72.24%	-64.84%
Income Tax	$1.400M	$700.0K	$2.500M
% Of Pretax Income	0.86%	2.4%	3.5%
Net Earnings	$150.0M	$26.50M	$64.27M
YoY Change	133.43%	-74.82%	-65.26%
Net Earnings / Revenue	11.62%	8.76%	5.18%
Basic Earnings Per Share	$0.49		$0.20
Diluted Earnings Per Share	$0.48	$89.86K	$0.20
COMMON SHARES
Basic Shares Outstanding	300.3M	294.5M	294.5M
Diluted Shares Outstanding	301.7M		294.9M

Balance Sheet

Concept	2021	2020 Q4	2020
SHORT-TERM ASSETS
Cash & Short-Term Investments	$967.0K	$1.400M	$1.400M
YoY Change	-30.93%	-82.72%	-82.72%
Cash & Equivalents	$967.0K	$1.409M	$1.400M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$967.0K	$1.400M	$1.400M
YoY Change	-30.93%	-82.72%	-82.72%
LONG-TERM ASSETS
Property, Plant & Equipment	$9.801B	$8.564B	$8.564B
YoY Change	14.44%	-1.28%	-1.28%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$702.5M	$595.5M	$600.2M
YoY Change	17.04%	1.71%	2.02%
Other Assets	$27.45M	$125.6M	$125.6M
YoY Change	-78.14%	398.41%	398.41%
Total Long-Term Assets	$10.77B	$9.636B	$9.636B
YoY Change	11.81%	0.08%	0.08%
TOTAL ASSETS
Total Short-Term Assets	$967.0K	$1.400M	$1.400M
Total Long-Term Assets	$10.77B	$9.636B	$9.636B
Total Assets	$10.78B	$9.638B	$9.638B
YoY Change	11.81%	0.01%	0.01%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$137.0M	$111.0M	$111.0M
YoY Change	23.38%	23.47%	23.47%
Accrued Expenses	$238.5M	$240.4M	$240.4M
YoY Change	-0.8%	-1.39%	-1.39%
Deferred Revenue
YoY Change
Short-Term Debt	$220.0M	$190.0M	$190.0M
YoY Change	15.79%	-36.67%	-36.67%
Long-Term Debt Due	$1.140M	$1.100M	$1.100M
YoY Change	3.64%	-99.01%	-99.01%
Total Short-Term Liabilities	$809.8M	$737.2M	$737.2M
YoY Change	9.85%	-20.86%	-20.86%
LONG-TERM LIABILITIES
Long-Term Debt	$5.192B	$4.786B	$4.786B
YoY Change	8.49%	11.37%	11.37%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$5.192B	$4.786B	$4.786B
YoY Change	8.49%	11.37%	11.37%
TOTAL LIABILITIES
Total Short-Term Liabilities	$809.8M	$737.2M	$737.2M
Total Long-Term Liabilities	$5.192B	$4.786B	$4.786B
Total Liabilities	$7.332B	$5.523B	$6.403B
YoY Change	14.51%	5.63%	2.0%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock		$2.966M
YoY Change		0.68%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$3.443B	$3.234B	$3.234B
YoY Change
Total Liabilities & Shareholders Equity	$10.78B	$9.638B	$9.638B
YoY Change	11.81%	0.01%	0.01%

Cashflow Statement

Concept	2021	2020 Q4	2020
OPERATING ACTIVITIES
Net Income	$150.0M	$26.50M	$64.27M
YoY Change	133.43%	-74.82%	-65.26%
Depreciation, Depletion And Amortization	$619.8M	$148.2M	$618.6M
YoY Change	0.19%	2.07%	21.8%
Cash From Operating Activities	$664.0M	$147.7M	$604.3M
YoY Change	9.87%	-15.02%	-4.18%
INVESTING ACTIVITIES
Capital Expenditures	-$1.589B	-$342.7M	-$704.7M
YoY Change	125.49%	92.31%	-55.75%
Acquisitions
YoY Change
Other Investing Activities	$316.8M	$174.7M	$243.9M
YoY Change	29.89%	-238.98%	-359.47%
Cash From Investing Activities	-$1.272B	-$168.1M	-$460.8M
YoY Change	176.07%	-44.69%	-72.68%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$899.1M		-$82.44M
YoY Change	-1190.57%		-111.37%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	612.5M	20.40M	-152.6M
YoY Change	-501.42%	-85.41%	-117.33%
NET CHANGE
Cash From Operating Activities	664.0M	147.7M	604.3M
Cash From Investing Activities	-1.272B	-168.1M	-460.8M
Cash From Financing Activities	612.5M	20.40M	-152.6M
Net Change In Cash	4.247M	-0.00000008941	-9.120M
YoY Change	-146.57%	-100.0%	-94.81%
FREE CASH FLOW
Cash From Operating Activities	$664.0M	$147.7M	$604.3M
Capital Expenditures	-$1.589B	-$342.7M	-$704.7M
Free Cash Flow	$2.253B	$490.4M	$1.309B
YoY Change	72.12%	39.32%	-41.13%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	145787000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	60036000
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	180861000
CY2019	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	http://www.udr.com/20211231#ManagementAndOtherFeesMember
CY2020	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	http://www.udr.com/20211231#ManagementAndOtherFeesMember
CY2021	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	http://www.udr.com/20211231#ManagementAndOtherFeesMember
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000074208
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	296611579
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	318149635
CY2021	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	http://www.udr.com/20211231#ManagementAndOtherFeesMember
CY2020	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	http://www.udr.com/20211231#ManagementAndOtherFeesMember
CY2019	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	http://www.udr.com/20211231#ManagementAndOtherFeesMember
CY2021	udr	Community Threshold Period Above Occupancy Threshold CommunityThresholdPeriodAboveOccupancyThreshold	P3M
CY2021	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	http://www.udr.com/20211231#ManagementAndOtherFeesMember
CY2020	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	http://www.udr.com/20211231#ManagementAndOtherFeesMember
CY2019	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	http://www.udr.com/20211231#ManagementAndOtherFeesMember
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	1-10524
CY2021	dei	Entity Registrant Name EntityRegistrantName	UDR, Inc.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2021	udr	Casualty Related Recoveries Charges Net CasualtyRelatedRecoveriesChargesNet	3748000
CY2020	udr	Casualty Related Recoveries Charges Net CasualtyRelatedRecoveriesChargesNet	2131000
CY2019	udr	Casualty Related Recoveries Charges Net CasualtyRelatedRecoveriesChargesNet	474000
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2021	udr	Long Term Incentive Plan Unit Grants Vestings Net LongTermIncentivePlanUnitGrantsVestingsNet	7084000
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	18844000
CY2020	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	277886000
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	54-0857512
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	1745 Shea Center Drive, Suite 200
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Highlands Ranch
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	CO
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	80129
CY2021	dei	City Area Code CityAreaCode	720
CY2021	dei	Local Phone Number LocalPhoneNumber	283-6120
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value
CY2021	dei	Trading Symbol TradingSymbol	UDR
CY2021	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	9500000000
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	318264646
CY2021	dei	Auditor Firm AuditorFirmId	42
CY2021	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2021	dei	Auditor Location AuditorLocation	Denver Colorado
CY2021Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	14352234000
CY2020Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	12706940000
CY2021Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	5136589000
CY2020Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	4590577000
CY2021Q4	udr	Real Estate Held For Investment Net Excluding Real Estate Under Development Or Held For Disposition RealEstateHeldForInvestmentNetExcludingRealEstateUnderDevelopmentOrHeldForDisposition	9215645000
CY2020Q4	udr	Real Estate Held For Investment Net Excluding Real Estate Under Development Or Held For Disposition RealEstateHeldForInvestmentNetExcludingRealEstateUnderDevelopmentOrHeldForDisposition	8116363000
CY2021Q4	udr	Real Estate Under Development Accumulated Depreciation RealEstateUnderDevelopmentAccumulatedDepreciation	507000
CY2020Q4	udr	Real Estate Under Development Accumulated Depreciation RealEstateUnderDevelopmentAccumulatedDepreciation	1010000
CY2021Q4	us-gaap	Development In Process DevelopmentInProcess	388062000
CY2020Q4	us-gaap	Development In Process DevelopmentInProcess	246867000
CY2021Q4	udr	Accumulated Depreciation Of Real Estate Held For Sale AccumulatedDepreciationOfRealEstateHeldForSale	0
CY2020Q4	udr	Accumulated Depreciation Of Real Estate Held For Sale AccumulatedDepreciationOfRealEstateHeldForSale	13779000
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CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1409000
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CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	26860000
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CY2021Q4	us-gaap	Assets Assets	10775220000
CY2020Q4	us-gaap	Assets Assets	9637533000
CY2021Q4	us-gaap	Secured Debt SecuredDebt	1057380000
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CY2021Q4	us-gaap	Unsecured Debt UnsecuredDebt	4355407000
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CY2021Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current And Noncurrent AccrualForTaxesOtherThanIncomeTaxesCurrentAndNoncurrent	33095000
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CY2021	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	136052000
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CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	267968000
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	249103000
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	221057000
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	65646000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	300326000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	137873000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	294545000
CY2021	us-gaap	Interest Expense Debt InterestExpenseDebt	186267000
CY2020	us-gaap	Interest Expense Debt InterestExpenseDebt	202706000
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	170917000
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	15085000
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6274000
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	15404000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	162432000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	71515000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	203417000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1439000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2545000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3838000
CY2021	us-gaap	Profit Loss ProfitLoss	160993000
CY2020	us-gaap	Profit Loss ProfitLoss	68970000
CY2019	us-gaap	Profit Loss ProfitLoss	199579000
CY2021	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	10873000
CY2020	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	4543000
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	14426000
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	104000
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	161000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	188000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	150016000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	64266000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	184965000
CY2021	us-gaap	Dividends Preferred Stock DividendsPreferredStock	4229000
CY2020	us-gaap	Dividends Preferred Stock DividendsPreferredStock	4230000
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	4104000
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	145787000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	60036000
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	180861000
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	285247000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	301703000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	294927000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	286015000
CY2021	us-gaap	Profit Loss ProfitLoss	160993000
CY2020	us-gaap	Profit Loss ProfitLoss	68970000
CY2019	us-gaap	Profit Loss ProfitLoss	199579000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	3502000
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-3382000
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-8437000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-1755000
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-4827000
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	2770000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	5257000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1445000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-11207000
CY2021	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	166250000
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	70415000
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	188372000
CY2021	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	11351000
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	4845000
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	13788000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	154899000
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	65570000
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	174584000
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2922777000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	184965000
CY2019	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-125000
CY2019	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	125000
CY2019	udr	Long Term Incentive Plan Unit Grants Vestings Net LongTermIncentivePlanUnitGrantsVestingsNet	13370000
CY2019	udr	Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-10381000
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	2088000
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	725315000
CY2019	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	134031000
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.37
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	395113000
CY2019	us-gaap	Preferred Stock Per Share Amounts Of Preferred Dividends In Arrears PreferredStockPerShareAmountsOfPreferredDividendsInArrears	1.4832
CY2019	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	4104000
CY2019	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-183884000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3389314000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	64266000
CY2020	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-99000
CY2020	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	125000
CY2020	udr	Long Term Incentive Plan Unit Grants Vestings Net LongTermIncentivePlanUnitGrantsVestingsNet	-6355000
CY2020	udr	Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1304000
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	2887000
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	102234000
CY2020	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	12666000
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.44
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	425233000
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	19795000
CY2020	us-gaap	Preferred Stock Per Share Amounts Of Preferred Dividends In Arrears PreferredStockPerShareAmountsOfPreferredDividendsInArrears	1.5592
CY2020	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	4230000
CY2020	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	143741000
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3258591000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	150016000
CY2021	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-80000
CY2021	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	125000
CY2021	udr	Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	4883000
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	4116000
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	899053000
CY2021	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	99932000
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.45
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	442329000
CY2021	us-gaap	Preferred Stock Per Share Amounts Of Preferred Dividends In Arrears PreferredStockPerShareAmountsOfPreferredDividendsInArrears	1.570
CY2021	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	4229000
CY2021	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-502768000
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3474304000
CY2021	us-gaap	Profit Loss ProfitLoss	160993000
CY2020	us-gaap	Profit Loss ProfitLoss	68970000
CY2019	us-gaap	Profit Loss ProfitLoss	199579000
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	619833000
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	618629000
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	507923000
CY2021	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	136052000
CY2020	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	119277000
CY2019	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	5282000
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	65646000
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	18844000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	137873000
CY2021	udr	Return On Investment In Equity Method Investments ReturnOnInvestmentInEquityMethodInvestments	23269000
CY2020	udr	Return On Investment In Equity Method Investments ReturnOnInvestmentInEquityMethodInvestments	20664000
CY2019	udr	Return On Investment In Equity Method Investments ReturnOnInvestmentInEquityMethodInvestments	5179000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	22052000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	19616000
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	24330000
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-42336000
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-49190000
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-29594000
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	19182000
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	12193000
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	10364000
CY2021	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	33454000
CY2020	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	44670000
CY2019	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	10956000
CY2021	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	11447000
CY2020	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-2155000
CY2019	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	7846000
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	663960000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	604316000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	630704000
CY2021	us-gaap	Payments To Acquire Buildings PaymentsToAcquireBuildings	1244508000
CY2020	us-gaap	Payments To Acquire Buildings PaymentsToAcquireBuildings	407829000
CY2019	us-gaap	Payments To Acquire Buildings PaymentsToAcquireBuildings	1370770000
CY2021	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	280077000
CY2019	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	167188000
CY2021	us-gaap	Payments To Acquire Furniture And Fixtures PaymentsToAcquireFurnitureAndFixtures	10140000
CY2019	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	38000000
CY2021	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	178029000
CY2020	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	121240000
CY2019	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	25401000
CY2021	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	156384000
CY2020	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	163105000
CY2020	us-gaap	Payments To Acquire Furniture And Fixtures PaymentsToAcquireFurnitureAndFixtures	11008000
CY2019	us-gaap	Payments To Acquire Furniture And Fixtures PaymentsToAcquireFurnitureAndFixtures	17159000
CY2021	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	112321000
CY2020	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	76073000
CY2019	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	93059000
CY2021	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	37362000
CY2020	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	49342000
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	72441000
CY2020	udr	Payments For Deposits On Pending Acquisitions PaymentsForDepositsOnPendingAcquisitions	-1530000
CY2019	udr	Payments For Deposits On Pending Acquisitions PaymentsForDepositsOnPendingAcquisitions	-12160000
CY2021	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-111690000
CY2020	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	7285000
CY2019	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	111391000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1272253000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-460842000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1686687000
CY2021	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	1096000
CY2020	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	425839000
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	162253000
CY2020	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	160930000
CY2019	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	162500000
CY2021	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	300000000
CY2020	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	300000000
CY2019	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	700000000
CY2021	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	511552000
CY2020	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	959419000
CY2019	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	1099816000
CY2021	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	30000000
CY2020	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	-110000000
CY2019	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	198885000
CY2021	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	1522000
CY2020	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	11441000
CY2019	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	16567000
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	899053000
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	102234000
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	725315000
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	19795000
CY2021	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	33663000
CY2020	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	32038000
CY2021	udr	Number Of Apartment Homes With Ownership Interest Through Preferred Equity Investments NumberOfApartmentHomesWithOwnershipInterestThroughPreferredEquityInvestments	3733
CY2020	us-gaap	Conversion Of Stock Shares Converted1 ConversionOfStockSharesConverted1	303146
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	31580000
CY2021	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	4225000
CY2020	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	4217000
CY2019	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	4063000
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	433780000
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	419350000
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	383079000
CY2021	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	40769000
CY2020	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	62645000
CY2019	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	27782000
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-16054000
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-12734000
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-13943000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	612540000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-152594000
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	880383000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	4247000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-9120000
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-175600000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	24171000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	33291000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	208891000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	28418000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	24171000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	33291000
CY2021	us-gaap	Interest Paid Net InterestPaidNet	136978000
CY2020	us-gaap	Interest Paid Net InterestPaidNet	159386000
CY2019	us-gaap	Interest Paid Net InterestPaidNet	160622000
CY2021	us-gaap	Proceeds From Lease Payments ProceedsFromLeasePayments	12502000
CY2020	us-gaap	Proceeds From Lease Payments ProceedsFromLeasePayments	12502000
CY2019	us-gaap	Proceeds From Lease Payments ProceedsFromLeasePayments	7874000
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	4778000
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1029000
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1519000
CY2021	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	201296000
CY2021	us-gaap	Escrow Deposit Disbursements Related To Property Acquisition1 EscrowDepositDisbursementsRelatedToPropertyAcquisition1	25000000
CY2021	udr	Cancellation Of Secured Note Receivable Related To Foreclosure CancellationOfSecuredNoteReceivableRelatedToForeclosure	24869000
CY2021	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	16425000
CY2020	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	14700000
CY2019	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	288108000
CY2019	us-gaap	Transfer To Investments TransferToInvestments	60625000
CY2019	udr	Secured Debt Assumed In Consolidation Of Unconsolidated Joint Ventures SecuredDebtAssumedInConsolidationOfUnconsolidatedJointVentures	551800000
CY2021	udr	Operating Partnership Units Issued For Real Estate Net OperatingPartnershipUnitsIssuedForRealEstateNet	48533000
CY2020	udr	Notes Receivable Cancellation NotesReceivableCancellation	2250000
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	2182000
CY2019	udr	Recognition Of Operating Lease Right Of Use Assets RecognitionOfOperatingLeaseRightOfUseAssets	94349000
CY2019	udr	Operating Lease Liabilities Incurred With Right Of Use Asset OperatingLeaseLiabilitiesIncurredWithRightOfUseAsset	88336000
CY2021	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	5300000
CY2019	us-gaap	Conversion Of Stock Shares Converted1 ConversionOfStockSharesConverted1	3165780
CY2019	udr	Right Of Use Assets Change Due To Remeasurement RightOfUseAssetsChangeDueToRemeasurement	111055000
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	14578000
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	23501000
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	14742000
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	39856000
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	31387000
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	16635000
CY2021	us-gaap	Conversion Of Stock Shares Converted1 ConversionOfStockSharesConverted1	1916613
CY2021	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	99932000
CY2020	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	12666000
CY2019	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	134031000
CY2021Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	124729000
CY2020Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	115795000
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	109382000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1409000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8106000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	185216000
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	22762000
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	25185000
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	23675000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	24171000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	33291000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	208891000
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	967000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1409000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8106000
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	27451000
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	22762000
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	25185000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	28418000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	24171000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	33291000
CY2021Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	160
CY2021Q4	udr	Number Of Markets Operating Within NumberOfMarketsOperatingWithin	21
CY2021Q4	udr	Number Of Apartment Homes Owned And Consolidated By Company NumberOfApartmentHomesOwnedAndConsolidatedByCompany	53229
CY2021	udr	Joint Venture Number Of Completed Or To Be Completed Apartment Homes In Operating Communities JointVentureNumberOfCompletedOrToBeCompletedApartmentHomesInOperatingCommunities	6570
CY2021Q4	us-gaap	Partners Capital Account Units PartnersCapitalAccountUnits	186100000
CY2020Q4	us-gaap	Partners Capital Account Units PartnersCapitalAccountUnits	184800000
CY2021	udr	Development Costs Excluding Direct Costs And Capitalized Interest DevelopmentCostsExcludingDirectCostsAndCapitalizedInterest	11300000
CY2020	udr	Development Costs Excluding Direct Costs And Capitalized Interest DevelopmentCostsExcludingDirectCostsAndCapitalizedInterest	12000000.0
CY2019	udr	Development Costs Excluding Direct Costs And Capitalized Interest DevelopmentCostsExcludingDirectCostsAndCapitalizedInterest	8400000
CY2021	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	9700000
CY2020	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	7000000.0
CY2019	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	5100000
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	0
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-600000
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-700000
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	26995000
CY2020Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	158685000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	135000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	693000
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	26860000
CY2020Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	157992000
CY2020	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	9100000
CY2019	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	5500000
CY2021	udr	Proceeds From Promoted Interest Received ProceedsFromPromotedInterestReceived	0
CY2020	udr	Proceeds From Promoted Interest Received ProceedsFromPromotedInterestReceived	0
CY2019	udr	Proceeds From Promoted Interest Received ProceedsFromPromotedInterestReceived	8500000
CY2019	us-gaap	Interest Income Related Party InterestIncomeRelatedParty	0
CY2020	us-gaap	Interest Income Related Party InterestIncomeRelatedParty	0
CY2021	us-gaap	Interest Income Related Party InterestIncomeRelatedParty	0
CY2020Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	8466106000
CY2021	udr	Minimum Period Of Time Units Have Been Outstanding Prior To Redemption MinimumPeriodOfTimeUnitsHaveBeenOutstandingPriorToRedemption	P1Y
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	800000
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	3200000
CY2021Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0
CY2021Q4	udr	Real Estate Owned Accumulated Amortization Intangible Assets RealEstateOwnedAccumulatedAmortizationIntangibleAssets	8800000
CY2021	us-gaap	Advertising Expense AdvertisingExpense	8300000
CY2020	us-gaap	Advertising Expense AdvertisingExpense	7900000
CY2019	us-gaap	Advertising Expense AdvertisingExpense	6500000
CY2021	udr	Minimum Percentage Of Carrying Value Of Real Estate Portfolio Held By Company MinimumPercentageOfCarryingValueOfRealEstatePortfolioHeldByCompany	0.10
CY2021Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	160
CY2021Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	13
CY2021Q4	udr	Number Of Apartment Homes Owned And Consolidated By Company NumberOfApartmentHomesOwnedAndConsolidatedByCompany	53229
CY2021	udr	Adjustment To Rental Income Covid19 Pandemic AdjustmentToRentalIncomeCovid19Pandemic	-100000
CY2021	udr	Adjustment To Profit Loss Covid19 Pandemic AdjustmentToProfitLossCovid19Pandemic	-100000
CY2020	udr	Adjustment To Rental Income Covid19 Pandemic AdjustmentToRentalIncomeCovid19Pandemic	-18400000
CY2020	udr	Adjustment To Profit Loss Covid19 Pandemic AdjustmentToProfitLossCovid19Pandemic	-1100000
CY2020	us-gaap	Impairment Of Investments ImpairmentOfInvestments	3100000
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-weight:bold;margin:0pt 0pt 10pt 0pt;">Use of Estimates</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt 0pt 10pt 0pt;">The preparation of these financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities at the dates of the financial statements and the amounts of revenues and expenses during the reporting periods. Actual amounts realized or paid could differ from those estimates.</p>
CY2021Q4	us-gaap	Land Land	2342385000
CY2020Q4	us-gaap	Land Land	2139765000
CY2021Q4	us-gaap	Land Improvements LandImprovements	241905000
CY2020Q4	us-gaap	Land Improvements LandImprovements	233823000
CY2021Q4	udr	Investment Building And Building Improvements And Furniture Fixtures And Equipment InvestmentBuildingAndBuildingImprovementsAndFurnitureFixturesAndEquipment	11717931000
CY2020Q4	udr	Investment Building And Building Improvements And Furniture Fixtures And Equipment InvestmentBuildingAndBuildingImprovementsAndFurnitureFixturesAndEquipment	10292782000
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill	50013000
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill	40570000
CY2021Q4	udr	Real Estate Owned Gross RealEstateOwnedGross	14740803000
CY2020Q4	udr	Real Estate Owned Gross RealEstateOwnedGross	13071472000
CY2021Q4	udr	Real Estates Owned Accumulated Depreciation RealEstatesOwnedAccumulatedDepreciation	5137096000
CY2020Q4	udr	Real Estates Owned Accumulated Depreciation RealEstatesOwnedAccumulatedDepreciation	4605366000
CY2021Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	9603707000
CY2019	udr	Income From Participating Loan IncomeFromParticipatingLoan	137873000
CY2021Q4	us-gaap	Deferred Gain On Sale Of Property DeferredGainOnSaleOfProperty	8700000
CY2020Q4	us-gaap	Deferred Gain On Sale Of Property DeferredGainOnSaleOfProperty	8400000
CY2020Q4	udr	Real Estate Owned Accumulated Amortization Intangible Assets RealEstateOwnedAccumulatedAmortizationIntangibleAssets	5800000
CY2021Q4	udr	Number Of Communities Under Development NumberOfCommunitiesUnderDevelopment	5
CY2021Q4	udr	Number Of Homes Under Development NumberOfHomesUnderDevelopment	1417
CY2021	udr	Number Of Homes Completed NumberOfHomesCompleted	0
CY2021Q4	udr	Investments On Development Communities InvestmentsOnDevelopmentCommunities	388600000
CY2021	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	49900000
CY2021Q4	udr	Number Of Communities Subject To Ground Leases NumberOfCommunitiesSubjectToGroundLeases	6
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	62656000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	23123000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	4733000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	4528000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	4347000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	4105000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	21820000
CY2021	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-3000
CY2020	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	5745000
CY2019	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	11135000
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	696376000
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	595486000
CY2021	udr	Income From Participating Loan IncomeFromParticipatingLoan	65646000
CY2020	udr	Income From Participating Loan IncomeFromParticipatingLoan	18844000
CY2021	us-gaap	Lessee Operating Lease Existence Of Option To Extend LesseeOperatingLeaseExistenceOfOptionToExtend	true
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	197500000
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	200900000
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	192500000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	195600000
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P43Y2M12D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P43Y10M24D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.050
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.050
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	221140000
CY2021	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	3500000
CY2021	udr	Operating Lease Liabilities Amortization OperatingLeaseLiabilitiesAmortization	3100000
CY2020	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	3300000
CY2020	udr	Operating Lease Liabilities Amortization OperatingLeaseLiabilitiesAmortization	3000000.0
CY2019	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	1200000
CY2019	udr	Operating Lease Liabilities Amortization OperatingLeaseLiabilitiesAmortization	800000
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	300000
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	300000
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	400000
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	25208000
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	23746000
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	21649000
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	18541000
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	15734000
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	67713000
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	172591000
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	400000
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	200000
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	400000
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	5412787000
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	4976548000
CY2021Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0280
CY2021Q4	udr	Secured Debt Encumbers Real Estate Owned Percent SecuredDebtEncumbersRealEstateOwnedPercent	0.12
CY2021Q4	udr	Secured Debt Unencumbered Real Estate Owned Percent SecuredDebtUnencumberedRealEstateOwnedPercent	0.88
CY2021Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	27000000.0
CY2020Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	12900000
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1242000
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	141937000
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	174793000
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	352744000
CY2021Q4	udr	Long Term Debt Maturities Repayment Of Principle In Year Six LongTermDebtMaturitiesRepaymentOfPrincipleInYearSix	652860000
CY2021Q4	udr	Long Term Debt Maturities Repayment Of Principle In Year Seven LongTermDebtMaturitiesRepaymentOfPrincipleInYearSeven	462310000
CY2021Q4	udr	Long Term Debt Maturities Repayment Of Principle In Year Eight LongTermDebtMaturitiesRepaymentOfPrincipleInYearEight	491986000
CY2021Q4	udr	Long Term Debt Maturities Repayment Of Principle In Year Nine LongTermDebtMaturitiesRepaymentOfPrincipleInYearNine	762010000
CY2021Q4	udr	Long Term Debt Maturities Repayment Of Principle In Year Ten LongTermDebtMaturitiesRepaymentOfPrincipleInYearTen	760930000
CY2021Q4	udr	Long Term Debt Maturities Repayments Of Principal After Year Ten LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearTen	1377000000
CY2021Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	5398952000
CY2021Q4	udr	Debt Instrument Unamortized Fair Market Value Adjustment Discount Premium Deferred Financing Cost DebtInstrumentUnamortizedFairMarketValueAdjustmentDiscountPremiumDeferredFinancingCost	-13835000
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	5412787000
CY2021	us-gaap	Profit Loss ProfitLoss	160993000
CY2020	us-gaap	Profit Loss ProfitLoss	68970000
CY2019	us-gaap	Profit Loss ProfitLoss	199579000
CY2021	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	10873000
CY2020	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	4543000
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	14426000
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	104000
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	161000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	188000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	150016000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	64266000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	184965000
CY2021	us-gaap	Dividends Preferred Stock DividendsPreferredStock	4229000
CY2020	us-gaap	Dividends Preferred Stock DividendsPreferredStock	4230000
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	4104000
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	145787000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	60036000
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	180861000
CY2021	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	300579000
CY2020	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	294808000
CY2019	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	285509000
CY2021	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	253000
CY2020	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	263000
CY2019	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	262000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	300326000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	294545000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	285247000
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1377000
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	382000
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	768000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	301703000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	294927000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	286015000
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	450000000.0
CY2021Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000.0
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.45
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.44
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.37
CY2008	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	10000000.0
CY2021	udr	Shares Reserved For Issuance Under Stock Purchase Plan SharesReservedForIssuanceUnderStockPurchasePlan	11000000.0
CY2021	udr	Share Based Compensation Arrangement By Share Based Payment Award Number Of Unexercised Stock Options ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfUnexercisedStockOptions	0
CY2021	udr	Taxable Distributions Paid Per Common Share Ordinary Income TaxableDistributionsPaidPerCommonShareOrdinaryIncome	0.9798
CY2020	udr	Taxable Distributions Paid Per Common Share Ordinary Income TaxableDistributionsPaidPerCommonShareOrdinaryIncome	1.0320
CY2019	udr	Taxable Distributions Paid Per Common Share Ordinary Income TaxableDistributionsPaidPerCommonShareOrdinaryIncome	0.9810
CY2021	udr	Taxable Distributions Paid Per Common Share Qualified Ordinary Income TaxableDistributionsPaidPerCommonShareQualifiedOrdinaryIncome	0.0405
CY2020	udr	Taxable Distributions Paid Per Common Share Qualified Ordinary Income TaxableDistributionsPaidPerCommonShareQualifiedOrdinaryIncome	0.0039
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CY2020	udr	Taxable Distributions Paid Per Common Share Long Term Capital Gain TaxableDistributionsPaidPerCommonShareLongTermCapitalGain	0.2974
CY2019	udr	Taxable Distributions Paid Per Common Share Long Term Capital Gain TaxableDistributionsPaidPerCommonShareLongTermCapitalGain	0.0210
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CY2020	udr	Taxable Distributions Paid Per Common Share Unrecapture Section Gain TaxableDistributionsPaidPerCommonShareUnrecaptureSectionGain	0.0892
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CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.4475
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.4225
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.3500
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1400000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2500000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3800000
CY2021	udr	Increase Decrease In Income Tax Expense Benefit IncreaseDecreaseInIncomeTaxExpenseBenefit	-1100000
CY2021	udr	Minimum Holding Period Of Redeemable Units For Redemption MinimumHoldingPeriodOfRedeemableUnitsForRedemption	P1Y
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	856294000
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	1018665000
CY2021	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-502768000
CY2020	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	143741000
CY2021	udr	Operating Partnership Units Issued For Real Estate Net OperatingPartnershipUnitsIssuedForRealEstateNet	48533000
CY2021	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1	99932000
CY2020	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1	12666000
CY2021	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	10873000
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CY2021	us-gaap	Distributions On Mandatorily Redeemable Securities DistributionsOnMandatorilyRedeemableSecurities	34044000
CY2020	us-gaap	Distributions On Mandatorily Redeemable Securities DistributionsOnMandatorilyRedeemableSecurities	34149000
CY2021	udr	Long Term Incentive Plan Operating Partnership Unit Vesting Value LongTermIncentivePlanOperatingPartnershipUnitVestingValue	14576000
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CY2021Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	1299442000
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	856294000
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	100000
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	200000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	200000
CY2020	udr	Transfer Between Levels TransferBetweenLevels	0
CY2021	udr	Transfer Between Levels TransferBetweenLevels	0
CY2021	us-gaap	Interest Expense Debt InterestExpenseDebt	186267000
CY2020	us-gaap	Interest Expense Debt InterestExpenseDebt	202706000
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	170917000
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	3279000
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	3279000
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	3279000
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	2000
CY2020Q4	us-gaap	Derivative Assets DerivativeAssets	2000
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	2000
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	167000
CY2020Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	167000
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	167000
CY2021Q4	udr	Cost Incurred To Date CostIncurredToDate	534691000
CY2021Q4	us-gaap	Purchase Commitment Remaining Minimum Amount Committed PurchaseCommitmentRemainingMinimumAmountCommitted	182603000
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2021	udr	Community Threshold Percent Occupancy Threshold CommunityThresholdPercentOccupancyThreshold	90%
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	6102000
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5069000
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14055000
CY2021	udr	Segment Reporting Reconciling Items Owned Property Management Costs SegmentReportingReconcilingItemsOwnedPropertyManagementCosts	38540000
CY2020	udr	Segment Reporting Reconciling Items Owned Property Management Costs SegmentReportingReconcilingItemsOwnedPropertyManagementCosts	35538000
CY2019	udr	Segment Reporting Reconciling Items Owned Property Management Costs SegmentReportingReconcilingItemsOwnedPropertyManagementCosts	32721000
CY2021	udr	Other Cost And Expense Operating Including Discontinued Operations OtherCostAndExpenseOperatingIncludingDiscontinuedOperations	21649000
CY2020	udr	Other Cost And Expense Operating Including Discontinued Operations OtherCostAndExpenseOperatingIncludingDiscontinuedOperations	22762000
CY2019	udr	Other Cost And Expense Operating Including Discontinued Operations OtherCostAndExpenseOperatingIncludingDiscontinuedOperations	13932000
CY2021	udr	Segment Reporting Reconciling Items Cost Of Services Depreciation And Amortization SegmentReportingReconcilingItemsCostOfServicesDepreciationAndAmortization	606648000
CY2020	udr	Segment Reporting Reconciling Items Cost Of Services Depreciation And Amortization SegmentReportingReconcilingItemsCostOfServicesDepreciationAndAmortization	608616000
CY2019	udr	Segment Reporting Reconciling Items Cost Of Services Depreciation And Amortization SegmentReportingReconcilingItemsCostOfServicesDepreciationAndAmortization	501257000
CY2021	udr	Other General And Administrative Expense Including Discontinued Operations OtherGeneralAndAdministrativeExpenseIncludingDiscontinuedOperations	57541000
CY2020	udr	Other General And Administrative Expense Including Discontinued Operations OtherGeneralAndAdministrativeExpenseIncludingDiscontinuedOperations	49885000
CY2019	udr	Other General And Administrative Expense Including Discontinued Operations OtherGeneralAndAdministrativeExpenseIncludingDiscontinuedOperations	51533000
CY2021	udr	Casualty Related Recoveries Charges Net CasualtyRelatedRecoveriesChargesNet	3748000
CY2020	udr	Casualty Related Recoveries Charges Net CasualtyRelatedRecoveriesChargesNet	2131000
CY2019	udr	Casualty Related Recoveries Charges Net CasualtyRelatedRecoveriesChargesNet	474000
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	13185000
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	10013000
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	6666000
CY2021	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	136052000
CY2020	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	119277000
CY2019	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	5282000
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	65646000
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	18844000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	137873000
CY2021	us-gaap	Interest Expense InterestExpense	186267000
CY2020	us-gaap	Interest Expense InterestExpense	202706000
CY2019	us-gaap	Interest Expense InterestExpense	170917000
CY2021	udr	Interest And Other Income Including Discontinued Operations InterestAndOtherIncomeIncludingDiscontinuedOperations	15085000
CY2020	udr	Interest And Other Income Including Discontinued Operations InterestAndOtherIncomeIncludingDiscontinuedOperations	6274000
CY2019	udr	Interest And Other Income Including Discontinued Operations InterestAndOtherIncomeIncludingDiscontinuedOperations	15404000
CY2021	udr	Income Tax Expense Benefit Of Reit Subsidiary Net Including Discontinued Operations IncomeTaxExpenseBenefitOfReitSubsidiaryNetIncludingDiscontinuedOperations	1439000
CY2020	udr	Income Tax Expense Benefit Of Reit Subsidiary Net Including Discontinued Operations IncomeTaxExpenseBenefitOfReitSubsidiaryNetIncludingDiscontinuedOperations	2545000
CY2019	udr	Income Tax Expense Benefit Of Reit Subsidiary Net Including Discontinued Operations IncomeTaxExpenseBenefitOfReitSubsidiaryNetIncludingDiscontinuedOperations	3838000
CY2021	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	10873000
CY2020	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	4543000
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	14426000
CY2021	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Nonredeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable	104000
CY2020	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Nonredeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable	161000
CY2019	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Nonredeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable	188000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	150016000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	64266000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	184965000
CY2021	udr	Same Store Communities SameStoreCommunities	45143
CY2021Q4	udr	Real Estate Owned Gross RealEstateOwnedGross	14740803000
CY2020Q4	udr	Real Estate Owned Gross RealEstateOwnedGross	13071472000
CY2021Q4	udr	Real Estates Owned Accumulated Depreciation RealEstatesOwnedAccumulatedDepreciation	5137096000
CY2020Q4	udr	Real Estates Owned Accumulated Depreciation RealEstatesOwnedAccumulatedDepreciation	4605366000
CY2021Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	9603707000
CY2020Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	8466106000
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	967000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1409000
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	27451000
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	22762000
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	26860000
CY2020Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	157992000
CY2021Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures Fair Value Disclosure InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure	702461000
CY2020Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures Fair Value Disclosure InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure	600233000
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	197463000
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	200913000
CY2021Q4	us-gaap	Other Assets OtherAssets	216311000
CY2020Q4	us-gaap	Other Assets OtherAssets	188118000
CY2021Q4	us-gaap	Assets Assets	10775220000
CY2020Q4	us-gaap	Assets Assets	9637533000
CY2021	udr	Same Store Communities SameStoreCommunities	45143
CY2021Q4	srt	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	1057380000
CY2021Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	2391933000
CY2021Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	8382200000
CY2021Q4	udr	Real Estate And Accumulated Depreciation Initial Cost Of Land And Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfLandAndBuildingsAndImprovements	10774133000
CY2021Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionImprovements	3966670000
CY2021Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	2658689000
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CY2021Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	14740803000
CY2021Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	5137096000
CY2021Q4	srt	Real Estate Federal Income Tax Basis RealEstateFederalIncomeTaxBasis	14000000000.0
CY2020Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	13071472000
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	12602101000
CY2018Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	10196159000
CY2021	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	1513106000
CY2020	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	413488000
CY2019	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	2241163000
CY2021	us-gaap	Real Estate Improvements RealEstateImprovements	346365000
CY2020	us-gaap	Real Estate Improvements RealEstateImprovements	299986000
CY2019	us-gaap	Real Estate Improvements RealEstateImprovements	195981000
CY2021	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	190140000
CY2020	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	244103000
CY2019	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	31202000
CY2021Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	14740803000
CY2020Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	13071472000
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	12602101000
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	4605366000
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	4131353000
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	3654160000
CY2021	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	584228000
CY2020	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	560876000
CY2019	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	477193000
CY2021	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	52498000
CY2020	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	86863000
CY2021Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	5137096000
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	4605366000
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	4131353000

Files In Submission

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$UDR
UDR, Inc. Stock $udr

2021 Form 10-K Financial Statement

#000007420822000010 Filed on February 15, 2022

Income Statement

Balance Sheet

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$UDR UDR, Inc. Stock $udr

2021 Form 10-K Financial Statement

#000007420822000010 Filed on February 15, 2022

Income Statement

Balance Sheet

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Facts In Submission

Files In Submission

$UDR
UDR, Inc. Stock $udr