$UDR
UDR, Inc. Stock $udr

$udr Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000007420820000031 Filed on February 18, 2020

Income Statement

Concept	2019 Q4	2019 Q3	2018 Q4
Revenue	$304.8M	$295.4M	$267.7M
YoY Change	13.86%	10.99%	5.85%
Cost Of Revenue	$96.20M	$93.70M	$84.60M
YoY Change	13.71%	9.33%	6.68%
Gross Profit	$208.6M	$201.7M	$183.1M
YoY Change	13.93%	11.75%	5.47%
Gross Profit Margin	68.44%	68.28%	68.4%
Selling, General & Admin	$14.50M	$14.30M	$11.00M
YoY Change	31.82%	20.17%	-5.17%
% of Gross Profit	6.95%	7.09%	6.01%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$145.2M	$129.0M	$108.1M
YoY Change	34.32%	17.7%	-2.7%
% of Gross Profit	69.61%	63.96%	59.04%
Operating Expenses	$162.5M	$143.9M	$123.0M
YoY Change	32.11%	15.4%	-2.15%
Operating Profit	$46.10M	$58.86M	$60.10M
YoY Change	-23.29%	6.99%	25.47%
Interest Expense	$60.50M	$42.52M	-$36.50M
YoY Change	-265.75%	23.61%	160.71%
% of Operating Profit	131.24%	72.25%	-60.73%
Other Income/Expense, Net		$1.875M
YoY Change		57.83%
Pretax Income	$105.2M	$30.92M	$160.0M
YoY Change	-34.25%	51.45%	108.6%
Income Tax	$0.00	$1.499M	$100.0K
% Of Pretax Income	0.0%	4.85%	0.06%
Net Earnings	$105.2M	$27.20M	$89.62M
YoY Change	17.43%	46.18%	29.5%
Net Earnings / Revenue	34.53%	9.21%	33.48%
Basic Earnings Per Share	$0.33	$0.09	$0.30
Diluted Earnings Per Share	$0.33	$0.09	$0.30
COMMON SHARES
Basic Shares Outstanding	293.1M	288.7M	270.1M
Diluted Shares Outstanding	294.1M	289.5M	270.8M

Balance Sheet

Concept	2019 Q4	2019 Q3	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$8.100M	$1.900M	$185.2M
YoY Change	-95.63%	72.73%	9160.0%
Cash & Equivalents	$8.106M	$1.895M	$185.2M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$8.100M	$1.900M	$185.2M
YoY Change	-95.63%	72.73%	9160.0%
LONG-TERM ASSETS
Property, Plant & Equipment	$8.675B	$7.700B	$6.542B
YoY Change	32.6%	14.9%	-4.45%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$585.5M	$791.2M	$585.5M
YoY Change	0.0%	3.1%	-18.77%
Other Assets	$25.20M	$21.60M	$23.70M
YoY Change	6.33%	-20.0%	19.7%
Total Long-Term Assets	$9.628B	$8.696B	$7.527B
YoY Change	27.93%	13.26%	-2.65%
TOTAL ASSETS
Total Short-Term Assets	$8.100M	$1.900M	$185.2M
Total Long-Term Assets	$9.628B	$8.696B	$7.527B
Total Assets	$9.636B	$8.698B	$7.712B
YoY Change	24.96%	13.27%	-0.28%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$89.90M	$72.20M	$76.00M
YoY Change	18.29%	-2.17%	-26.21%
Accrued Expenses	$243.8M	$157.7M	$38.70M
YoY Change	529.97%	467.27%	15.87%
Deferred Revenue
YoY Change
Short-Term Debt	$300.0M	$60.00M	$101.1M
YoY Change	196.74%
Long-Term Debt Due	$110.6M		$71.50M
YoY Change	54.69%
Total Short-Term Liabilities	$931.5M	$477.3M	$440.6M
YoY Change	111.42%	78.5%	58.43%
LONG-TERM LIABILITIES
Long-Term Debt	$4.297B	$3.876B	$3.375B
YoY Change	27.31%	1.7%	-8.08%
Other Long-Term Liabilities	$100.0K	$500.0K	$400.0K
YoY Change	-75.0%
Total Long-Term Liabilities	$4.297B	$3.876B	$3.376B
YoY Change	27.3%	1.71%	-8.06%
TOTAL LIABILITIES
Total Short-Term Liabilities	$931.5M	$477.3M	$440.6M
Total Long-Term Liabilities	$4.297B	$3.876B	$3.376B
Total Liabilities	$5.228B	$4.354B	$3.816B
YoY Change	37.01%	-14.39%	-22.24%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock	$2.946M	$2.929M	$2.755M
YoY Change	6.93%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$3.359B	$3.247B	$2.906B
YoY Change
Total Liabilities & Shareholders Equity	$9.636B	$8.698B	$7.712B
YoY Change	24.96%	13.27%	-0.28%

Cashflow Statement

Concept	2019 Q4	2019 Q3	2018 Q4
OPERATING ACTIVITIES
Net Income	$105.2M	$27.20M	$89.62M
YoY Change	17.43%	46.18%	29.5%
Depreciation, Depletion And Amortization	$145.2M	$129.0M	$108.1M
YoY Change	34.32%	17.7%	-2.7%
Cash From Operating Activities	$173.8M	$170.5M	$154.0M
YoY Change	12.86%	12.47%	18.83%
INVESTING ACTIVITIES
Capital Expenditures	-$178.2M	-$590.7M	-$51.90M
YoY Change	243.35%	865.2%	-57.0%
Acquisitions
YoY Change
Other Investing Activities	-$125.7M	$13.90M	$141.5M
YoY Change	-188.83%	-145.42%	46.33%
Cash From Investing Activities	-$303.9M	-$576.8M	$89.60M
YoY Change	-439.17%	528.32%	-473.33%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$349.9M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	139.8M	405.9M	-62.70M
YoY Change	-322.97%	-748.4%	-40.85%
NET CHANGE
Cash From Operating Activities	173.8M	170.5M	154.0M
Cash From Investing Activities	-303.9M	-576.8M	89.60M
Cash From Financing Activities	139.8M	405.9M	-62.70M
Net Change In Cash	9.700M	-400.0K	180.9M
YoY Change	-94.64%	-85.71%	-45325.0%
FREE CASH FLOW
Cash From Operating Activities	$173.8M	$170.5M	$154.0M
Capital Expenditures	-$178.2M	-$590.7M	-$51.90M
Free Cash Flow	$352.0M	$761.2M	$205.9M
YoY Change	70.96%	257.71%	-17.74%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2019	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	1138138000
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2019	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	udr:ManagementAndOtherFeesMember
CY2018	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	udr:ManagementAndOtherFeesMember
CY2017	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	udr:ManagementAndOtherFeesMember
CY2019	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	udr:ManagementAndOtherFeesMember
CY2018	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	udr:ManagementAndOtherFeesMember
CY2017	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	udr:ManagementAndOtherFeesMember
CY2019	udr	Community Threshold Period Above Occupancy Threshold CommunityThresholdPeriodAboveOccupancyThreshold	P3M
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	294588305
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	275545900
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6735000
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1971000
CY2018	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	4998000
CY2018	udr	Development Costs Excluding Direct Costs And Capitalized Interest DevelopmentCostsExcludingDirectCostsAndCapitalizedInterest	7500000
CY2017	udr	Development Costs Excluding Direct Costs And Capitalized Interest DevelopmentCostsExcludingDirectCostsAndCapitalizedInterest	8800000
CY2018	udr	Casualty Related Recoveries Charges Net CasualtyRelatedRecoveriesChargesNet	2121000
CY2019Q4	udr	Number Of Markets Operating Within NumberOfMarketsOperatingWithin	20
CY2019	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	5100000
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	294631463
CY2017	udr	Casualty Related Recoveries Charges Net CasualtyRelatedRecoveriesChargesNet	4335000
CY2019Q4	udr	Number Of Apartment Homes Owned And Consolidated By Company NumberOfApartmentHomesOwnedAndConsolidatedByCompany	47010
CY2019Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	12532324000
CY2019	udr	Joint Venture Number Of Completed Or To Be Completed Apartment Homes In Operating Communities JointVentureNumberOfCompletedOrToBeCompletedApartmentHomesInOperatingCommunities	5268
CY2019Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	8470748000
CY2018Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	10196159000
CY2018Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures Fair Value Disclosure InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure	780869000
CY2018Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	6541999000
CY2019Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	4131330000
CY2018Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	3654160000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8106000
CY2019Q4	udr	Real Estate Held For Investment Net Excluding Real Estate Under Development Or Held For Disposition RealEstateHeldForInvestmentNetExcludingRealEstateUnderDevelopmentOrHeldForDisposition	8400994000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	185216000
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	25185000
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	23675000
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	153650000
CY2019	dei	Trading Symbol TradingSymbol	UDR
CY2018Q4	us-gaap	Notes Receivable Net NotesReceivableNet	42259000
CY2019Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures Fair Value Disclosure InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure	588262000
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	204225000
CY2017	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	udr:ManagementAndOtherFeesMember
CY2018	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	udr:ManagementAndOtherFeesMember
CY2019	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	udr:ManagementAndOtherFeesMember
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000074208
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	1-10524
CY2019	dei	Entity Registrant Name EntityRegistrantName	UDR, Inc.
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	54-0857512
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	1745 Shea Center Drive, Suite 200
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Highlands Ranch
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	CO
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	80129
CY2019	dei	City Area Code CityAreaCode	720
CY2019	dei	Local Phone Number LocalPhoneNumber	283-6120
CY2019	dei	Security12b Title Security12bTitle	Common Stock
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q2	dei	Entity Public Float EntityPublicFloat	4900000000
CY2018Q4	udr	Real Estate Held For Investment Net Excluding Real Estate Under Development Or Held For Disposition RealEstateHeldForInvestmentNetExcludingRealEstateUnderDevelopmentOrHeldForDisposition	6541999000
CY2019Q4	udr	Real Estate Under Development Accumulated Depreciation RealEstateUnderDevelopmentAccumulatedDepreciation	23000
CY2018Q4	udr	Real Estate Under Development Accumulated Depreciation RealEstateUnderDevelopmentAccumulatedDepreciation	0
CY2019Q4	us-gaap	Development In Process DevelopmentInProcess	69754000
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000
CY2019	udr	Number Of Apartment Homes With Ownership Interest Through Preferred Equity Investments NumberOfApartmentHomesWithOwnershipInterestThroughPreferredEquityInvestments	2138
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	9636472000
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	350000000
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	350000000
CY2019Q4	us-gaap	Other Assets OtherAssets	186296000
CY2018Q4	us-gaap	Other Assets OtherAssets	137710000
CY2019Q4	us-gaap	Assets Assets	9636472000
CY2018Q4	us-gaap	Assets Assets	7711728000
CY2019Q4	us-gaap	Secured Debt SecuredDebt	1149441000
CY2018Q4	us-gaap	Secured Debt SecuredDebt	601227000
CY2019Q4	us-gaap	Unsecured Debt UnsecuredDebt	3558083000
CY2018Q4	us-gaap	Unsecured Debt UnsecuredDebt	2946560000
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	198558000
CY2019Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current And Noncurrent AccrualForTaxesOtherThanIncomeTaxesCurrentAndNoncurrent	29445000
CY2018Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current And Noncurrent AccrualForTaxesOtherThanIncomeTaxesCurrentAndNoncurrent	20608000
CY2019Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	45199000
CY2018Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	38747000
CY2019Q4	us-gaap	Advance Rent AdvanceRent	48353000
CY2018Q4	us-gaap	Advance Rent AdvanceRent	35060000
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	109382000
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	97666000
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	90032000
CY2018Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	76343000
CY2019Q4	us-gaap	Liabilities Liabilities	5228493000
CY2018Q4	us-gaap	Liabilities Liabilities	3816211000
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	1018665000
CY2018Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	972740000
CY2018Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	294588305
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	275545900
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	2946000
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	2755000
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	5781975000
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4920732000
CY2019Q4	us-gaap	Accumulated Distributions In Excess Of Net Income AccumulatedDistributionsInExcessOfNetIncome	2462132000
CY2018Q4	us-gaap	Accumulated Distributions In Excess Of Net Income AccumulatedDistributionsInExcessOfNetIncome	2063996000
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-10448000
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-67000
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	3358542000
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	2905625000
CY2019Q4	us-gaap	Minority Interest MinorityInterest	30772000
CY2018Q4	us-gaap	Minority Interest MinorityInterest	17152000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3389314000
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2922777000
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7711728000
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.050
CY2019	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	6666000
CY2018	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	6673000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	200000
CY2017	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	6408000
CY2019	us-gaap	Costs And Expenses CostsAndExpenses	936418000
CY2017	us-gaap	Depreciation Nonproduction DepreciationNonproduction	430054000
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	51533000
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	46983000
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	200000
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	48566000
CY2019	udr	Casualty Related Recoveries Charges Net CasualtyRelatedRecoveriesChargesNet	474000
CY2018	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	1035105000
CY2017	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	984309000
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14055000
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11754000
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11482000
CY2019	us-gaap	Revenues Revenues	1152193000
CY2018	us-gaap	Revenues Revenues	1046859000
CY2017	us-gaap	Revenues Revenues	995791000
CY2019	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	178947000
CY2018	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	169078000
CY2017	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	164660000
CY2019	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	150888000
CY2018	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	133912000
CY2017	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	121146000
CY2019	udr	Property Management Costs Operating PropertyManagementCostsOperating	32721000
CY2018	udr	Property Management Costs Operating PropertyManagementCostsOperating	28465000
CY2017	udr	Property Management Costs Operating PropertyManagementCostsOperating	27068000
CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	13932000
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	12100000
CY2017	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	9060000
CY2019	us-gaap	Depreciation Nonproduction DepreciationNonproduction	501257000
CY2018	us-gaap	Depreciation Nonproduction DepreciationNonproduction	429006000
CY2018	us-gaap	Costs And Expenses CostsAndExpenses	828338000
CY2017	us-gaap	Costs And Expenses CostsAndExpenses	811297000
CY2019	us-gaap	Gain Loss On Sale Of Properties Before Applicable Income Taxes GainLossOnSaleOfPropertiesBeforeApplicableIncomeTaxes	5282000
CY2018	us-gaap	Gain Loss On Sale Of Properties Before Applicable Income Taxes GainLossOnSaleOfPropertiesBeforeApplicableIncomeTaxes	136197000
CY2017	us-gaap	Gain Loss On Sale Of Properties Before Applicable Income Taxes GainLossOnSaleOfPropertiesBeforeApplicableIncomeTaxes	43404000
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	221057000
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	354718000
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	227898000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	137873000
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-5055000
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	31257000
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	170917000
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	134168000
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	128711000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	203417000
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.29
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	222230000
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	224400000
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	15404000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	268179000
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	267024000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	286015000
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	132415000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3838000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	688000
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-240000
CY2019	us-gaap	Profit Loss ProfitLoss	199579000
CY2018	us-gaap	Profit Loss ProfitLoss	221542000
CY2017	us-gaap	Profit Loss ProfitLoss	132655000
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	14426000
CY2018	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	18215000
CY2017	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	10933000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	188000
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	221000
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	164000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	184965000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	203106000
CY2017	us-gaap	Net Income Loss NetIncomeLoss	121558000
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	4104000
CY2018	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3868000
CY2017	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3708000
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	180861000
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	199238000
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	117850000
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.74
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.44
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.74
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.44
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	285247000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	269483000
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	268830000
CY2019	us-gaap	Profit Loss ProfitLoss	199579000
CY2018	us-gaap	Profit Loss ProfitLoss	221542000
CY2017	us-gaap	Profit Loss ProfitLoss	132655000
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-8437000
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	4806000
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	1802000
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	2770000
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	1948000
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-1407000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-11207000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2858000
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3209000
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	188372000
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1600000
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	135864000
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	200000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	244000
CY2019Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	13788000
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	18680000
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	11378000
CY2019	udr	Lease Practical Expedient Lessor Single Lease Component True False LeasePracticalExpedientLessorSingleLeaseComponentTrueFalse	true
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	174584000
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	205720000
CY2018	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	13328000
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	124486000
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3096970000
CY2017	us-gaap	Net Income Loss NetIncomeLoss	121558000
CY2017	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-147000
CY2017	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	125000
CY2017	udr	Long Term Incentive Plan Unit Grants Vestings Net LongTermIncentivePlanUnitGrantsVestingsNet	5432000
CY2017	udr	Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	2928000
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	438000
CY2017	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	14544000
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.24
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	331974000
CY2017	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3708000
CY2017	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-71096000
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2835364000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	203106000
CY2018	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-175000
CY2018	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	108000
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	19988000
CY2018	udr	Long Term Incentive Plan Unit Grants Vestings Net LongTermIncentivePlanUnitGrantsVestingsNet	7305000
CY2018	udr	Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	2614000
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	-23053000
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-508000
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	299825000
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	348079000
CY2018	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3868000
CY2018	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-43552000
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 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
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	3341000
CY2019	us-gaap	Profit Loss ProfitLoss	199579000
CY2018	us-gaap	Profit Loss ProfitLoss	221542000
CY2017	us-gaap	Profit Loss ProfitLoss	132655000
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	507923000
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	435679000
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	436462000
CY2019	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	5282000
CY2018	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	136197000
CY2017	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	43404000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	137873000
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-5055000
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	14244000
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	12862000
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	39958000
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	162253000
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	31257000
CY2019	udr	Return On Investment In Equity Method Investments ReturnOnInvestmentInEquityMethodInvestments	5179000
CY2018	udr	Return On Investment In Equity Method Investments ReturnOnInvestmentInEquityMethodInvestments	4248000
CY2017	udr	Return On Investment In Equity Method Investments ReturnOnInvestmentInEquityMethodInvestments	4416000
CY2018	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	112359000
CY2017	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	124728000
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	24330000
CY2017	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	20467000
CY2019	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	10956000
CY2018	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	13880000
CY2017	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	9008000
CY2019	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	7846000
CY2018	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	24987000
CY2017	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-4278000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	630704000
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	560676000
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	518915000
CY2019	us-gaap	Payments To Acquire Buildings PaymentsToAcquireBuildings	1370770000
CY2017	us-gaap	Payments To Acquire Buildings PaymentsToAcquireBuildings	96791000
CY2019	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	38000000
CY2018	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	247031000
CY2017	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	71235000
CY2019	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	25401000
CY2018	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	150238000
CY2017	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	248546000
CY2019	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	167188000
CY2019	us-gaap	Payments To Acquire Furniture And Fixtures PaymentsToAcquireFurnitureAndFixtures	17159000
CY2018	us-gaap	Payments To Acquire Furniture And Fixtures PaymentsToAcquireFurnitureAndFixtures	4850000
CY2017	us-gaap	Payments To Acquire Furniture And Fixtures PaymentsToAcquireFurnitureAndFixtures	1384000
CY2019	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	93059000
CY2018	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	112025000
CY2017	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	123842000
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	72441000
CY2018	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	42683000
CY2017	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	116329000
CY2019	udr	Payments For Deposits On Pending Acquisitions PaymentsForDepositsOnPendingAcquisitions	-12160000
CY2018	udr	Payments For Deposits On Pending Acquisitions PaymentsForDepositsOnPendingAcquisitions	-1000000
CY2019	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	111391000
CY2018	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	22790000
CY2017	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-321000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1686687000
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-113548000
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-407406000
CY2019	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	162500000
CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	279243000
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	139000
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-21361000
CY2017	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	326346000
CY2018	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	299994000
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	880383000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	3210000
CY2019	us-gaap	Transfer To Investments TransferToInvestments	60625000
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	551800000
CY2017	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	598095000
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-260067000
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-111785000
CY2019	udr	Operating Lease Assets Incurred With Right Of Use Asset OperatingLeaseAssetsIncurredWithRightOfUseAsset	94349000
CY2018	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	80000000
CY2019	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	700000000
CY2017	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	300000000
CY2019	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	1099816000
CY2019	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	198885000
CY2018	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	-198885000
CY2017	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	300000000
CY2019	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	16567000
CY2018	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-21751000
CY2017	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	417000
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	725315000
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	299825000
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	19988000
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	31580000
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	32457000
CY2017	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	31089000
CY2019	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	4063000
CY2018	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3836000
CY2017	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3708000
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	383079000
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	342241000
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	327793000
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-41725000
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-41485000
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-175600000
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	187061000
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-276000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	208891000
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	21830000
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	22106000
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
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	21830000
CY2019	us-gaap	Interest Paid Net InterestPaidNet	169558000
CY2018	us-gaap	Interest Paid Net InterestPaidNet	132466000
CY2017	us-gaap	Interest Paid Net InterestPaidNet	126348000
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1519000
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	625000
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1660000
CY2019	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	288108000
CY2017	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	140549000
CY2019	udr	Operating Lease Liabilities Incurred With Right Of Use Asset OperatingLeaseLiabilitiesIncurredWithRightOfUseAsset	88336000
CY2019	udr	Right Of Use Assets Change Due To Remeasurement RightOfUseAssetsChangeDueToRemeasurement	111055000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	3029000
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	14742000
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	4397000
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	25185000
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	2317000
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	16635000
CY2019Q4	us-gaap	Partners Capital Account Units PartnersCapitalAccountUnits	184100000
CY2018Q4	us-gaap	Partners Capital Account Units PartnersCapitalAccountUnits	183600000
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	22106000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8106000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	185216000
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	19057000
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	10304000
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	43930000
CY2019	us-gaap	Conversion Of Stock Shares Converted1 ConversionOfStockSharesConverted1	3165780
CY2018	us-gaap	Conversion Of Stock Shares Converted1 ConversionOfStockSharesConverted1	348057
CY2017	us-gaap	Conversion Of Stock Shares Converted1 ConversionOfStockSharesConverted1	389033
CY2019	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	134031000
CY2018	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	13328000
CY2017	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	14544000
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	109382000
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	97666000
CY2017Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	91455000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	185216000
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2038000
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2112000
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	23675000
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	19792000
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	19994000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	208891000
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	21830000
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2038000
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	23675000
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	19792000
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
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	21830000
CY2019Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	148
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	2883000
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	356000
CY2017	udr	Taxable Distributions Paid Per Common Share Qualified Ordinary Income TaxableDistributionsPaidPerCommonShareQualifiedOrdinaryIncome	0.011
CY2019	udr	Development Costs Excluding Direct Costs And Capitalized Interest DevelopmentCostsExcludingDirectCostsAndCapitalizedInterest	8400000
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	17304000
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	78818000
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	153650000
CY2019	us-gaap	Lease Practical Expedients Package LeasePracticalExpedientsPackage	true
CY2018	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	10600000
CY2017	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	18600000
CY2018Q4	us-gaap	Notes Receivable Net NotesReceivableNet	42259000
CY2019Q4	us-gaap	Debt Instrument Convertible Remaining Discount Amortization Period1 DebtInstrumentConvertibleRemainingDiscountAmortizationPeriod1	P30Y
CY2019	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	5500000
CY2018	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	4100000
CY2017	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	1800000
CY2019	udr	Proceeds From Promoted Interest Received ProceedsFromPromotedInterestReceived	8500000
CY2018	udr	Proceeds From Promoted Interest Received ProceedsFromPromotedInterestReceived	0
CY2017	udr	Proceeds From Promoted Interest Received ProceedsFromPromotedInterestReceived	0
CY2019	us-gaap	Interest Income Related Party InterestIncomeRelatedParty	0
CY2019	udr	Minimum Period Of Time Units Have Been Outstanding Prior To Redemption MinimumPeriodOfTimeUnitsHaveBeenOutstandingPriorToRedemption	P1Y
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	180245000
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	0
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	400000
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	356000
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	4707524000
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	3547787000
CY2019	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.0343
CY2019Q4	udr	Secured Debt Encumbers Real Estate Owned Amount SecuredDebtEncumbersRealEstateOwnedAmount	2100000000
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman';font-size:10pt;font-weight:bold;margin:0pt 0pt 10pt 0pt;">Use of Estimates</p><p style="font-family:'Times New Roman';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>
CY2019	udr	Minimum Percentage Of Carrying Value Of Real Estate Portfolio Held By Company MinimumPercentageOfCarryingValueOfRealEstatePortfolioHeldByCompany	0.10
CY2019Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	148
CY2019Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	13
CY2019Q4	udr	Number Of Apartment Homes Owned And Consolidated By Company NumberOfApartmentHomesOwnedAndConsolidatedByCompany	47010
CY2019Q4	us-gaap	Land Land	2164032000
CY2018Q4	us-gaap	Land Land	1849799000
CY2019Q4	us-gaap	Land Improvements LandImprovements	224964000
CY2018Q4	us-gaap	Land Improvements LandImprovements	213224000
CY2019Q4	udr	Investment Building And Building Improvements And Furniture Fixtures And Equipment InvestmentBuildingAndBuildingImprovementsAndFurnitureFixturesAndEquipment	10102758000
CY2018Q4	udr	Investment Building And Building Improvements And Furniture Fixtures And Equipment InvestmentBuildingAndBuildingImprovementsAndFurnitureFixturesAndEquipment	8133136000
CY2019Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill	40570000
CY2019Q4	udr	Real Estate Owned Gross RealEstateOwnedGross	12602101000
CY2018Q4	udr	Real Estate Owned Gross RealEstateOwnedGross	10196159000
CY2019Q4	udr	Real Estates Owned Accumulated Depreciation RealEstatesOwnedAccumulatedDepreciation	4131353000
CY2018Q4	udr	Real Estates Owned Accumulated Depreciation RealEstatesOwnedAccumulatedDepreciation	3654160000
CY2019Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	8470748000
CY2018Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	6541999000
CY2019Q4	udr	Gain From Consolidation Of Joint Venture GainFromConsolidationOfJointVenture	0
CY2019Q4	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	977800000
CY2019Q4	udr	Number Of Credit Facilities NumberOfCreditFacilities	1
CY2019Q4	udr	Number Of Land Parcels NumberOfLandParcels	4
CY2019Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	551800000
CY2019Q4	udr	Secured Debt Encumbers Real Estate Owned Percent SecuredDebtEncumbersRealEstateOwnedPercent	0.168
CY2019Q4	udr	Secured Debt Unencumbered Real Estate Owned Amount SecuredDebtUnencumberedRealEstateOwnedAmount	10500000000
CY2019Q4	udr	Secured Debt Unencumbered Real Estate Owned Percent SecuredDebtUnencumberedRealEstateOwnedPercent	0.832
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	81458000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	44241000
CY2019Q4	udr	Long Term Debt Maturities Repayment Of Principle In Year Nine LongTermDebtMaturitiesRepaymentOfPrincipleInYearNine	422465000
CY2019Q4	udr	Number Of Communities Under Development NumberOfCommunitiesUnderDevelopment	3
CY2019Q4	udr	Number Of Homes Under Development NumberOfHomesUnderDevelopment	878
CY2019Q4	udr	Budgeted Value Of Development Communities BudgetedValueOfDevelopmentCommunities	278500000
CY2019Q4	udr	Carrying Value Of Development Communities CarryingValueOfDevelopmentCommunities	69800000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	24754000
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	585490000
CY2019Q4	us-gaap	Deferred Gain On Sale Of Property DeferredGainOnSaleOfProperty	9000000.0
CY2018Q4	us-gaap	Deferred Gain On Sale Of Property DeferredGainOnSaleOfProperty	11000000.0
CY2019	udr	Taxable Distributions Paid Per Common Share Long Term Capital Gain TaxableDistributionsPaidPerCommonShareLongTermCapitalGain	0.021
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	198600000
CY2019Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P44Y8M12D
CY2019Q4	udr	Number Of Communities Subject To Ground Leases NumberOfCommunitiesSubjectToGroundLeases	6
CY2019	us-gaap	Lessee Operating Lease Existence Of Option To Extend LesseeOperatingLeaseExistenceOfOptionToExtend	true
CY2019	us-gaap	Lease Practical Expedients Package LeasePracticalExpedientsPackage	true
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	204200000
CY2019	udr	Right Of Use Assets Change Due To Remeasurement RightOfUseAssetsChangeDueToRemeasurement	111100000
CY2019Q4	udr	Number Of Ground Leases Becoming Fixed NumberOfGroundLeasesBecomingFixed	2
CY2019	udr	Operating Lease Right Of Use Asset Amortization OperatingLeaseRightOfUseAssetAmortization	1200000
CY2019	udr	Operating Lease Liabilities Amortization OperatingLeaseLiabilitiesAmortization	800000
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	400000
CY2019	us-gaap	Short Term Lease Payments ShortTermLeasePayments	0
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	22568000
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	22055000
CY2019Q4	udr	Long Term Debt Maturities Repayment Of Principle In Year Seven LongTermDebtMaturitiesRepaymentOfPrincipleInYearSeven	351070000
CY2019Q4	udr	Long Term Debt Maturities Repayment Of Principle In Year Eight LongTermDebtMaturitiesRepaymentOfPrincipleInYearEight	301111000
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	356000
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	117850000
CY2019	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	285509000
CY2019Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	35300000
CY2018Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	5000000.0
CY2019Q4	udr	Number Of Extensions Of Loan NumberOfExtensionsOfLoan	2
CY2015Q4	udr	Extension Period Of Option On Loan ExtensionPeriodOfOptionOnLoan	P6M
CY2018	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	268513000
CY2019Q4	us-gaap	Line Of Credit LineOfCredit	2900000
CY2018Q4	us-gaap	Line Of Credit LineOfCredit	3300000
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	410645000
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	20380000
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	3945000
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	660873000
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	410924000
CY2019Q4	udr	Long Term Debt Maturities Repayment Of Principle In Year Six LongTermDebtMaturitiesRepaymentOfPrincipleInYearSix	473189000
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000.0
CY2018	udr	Taxable Distributions Paid Per Common Share Long Term Capital Gain TaxableDistributionsPaidPerCommonShareLongTermCapitalGain	0.058
CY2019Q4	udr	Long Term Debt Maturities Repayment Of Principle In Year Ten LongTermDebtMaturitiesRepaymentOfPrincipleInYearTen	444584000
CY2019	us-gaap	Advertising Expense AdvertisingExpense	6500000
CY2018	us-gaap	Advertising Expense AdvertisingExpense	6700000
CY2017	us-gaap	Advertising Expense AdvertisingExpense	6200000
CY2019Q3	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	349800000
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	20443000
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	350000000.0
CY2018	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3868000
CY2017	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3708000
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	180861000
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	199238000
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.37
CY2019Q4	udr	Long Term Debt Maturities Repayments Of Principal After Year Ten LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearTen	1199500000
CY2019Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	4698686000
CY2019Q4	udr	Debt Instrument Unamortized Fair Market Value Adjustment Discount Premium Deferred Financing Cost DebtInstrumentUnamortizedFairMarketValueAdjustmentDiscountPremiumDeferredFinancingCost	-8838000
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	4707524000
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4200000
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4200000
CY2019	us-gaap	Income Loss Before Gain Or Loss On Sale Of Properties Extraordinary Items And Cumulative Effects Of Accounting Changes IncomeLossBeforeGainOrLossOnSaleOfPropertiesExtraordinaryItemsAndCumulativeEffectsOfAccountingChanges	199579000
CY2018	us-gaap	Income Loss Before Gain Or Loss On Sale Of Properties Extraordinary Items And Cumulative Effects Of Accounting Changes IncomeLossBeforeGainOrLossOnSaleOfPropertiesExtraordinaryItemsAndCumulativeEffectsOfAccountingChanges	221542000
CY2017	us-gaap	Income Loss Before Gain Or Loss On Sale Of Properties Extraordinary Items And Cumulative Effects Of Accounting Changes IncomeLossBeforeGainOrLossOnSaleOfPropertiesExtraordinaryItemsAndCumulativeEffectsOfAccountingChanges	132655000
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	14426000
CY2018	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	18215000
CY2017	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	10933000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	188000
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	221000
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	164000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	184965000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	203106000
CY2017	us-gaap	Net Income Loss NetIncomeLoss	121558000
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	4104000
CY2017	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	267567000
CY2019	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	262000
CY2018	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	334000
CY2017	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	543000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	285247000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	268179000
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	267024000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	286015000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	269483000
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	268830000
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.74
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.44
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.74
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.44
CY2019Q3	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	7500000
CY2019Q3	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	349900000
CY2019Q3	udr	Weighted Average Share Price WeightedAverageSharePrice	46.65
CY2017	udr	Taxable Distributions Paid Per Common Share Long Term Capital Gain TaxableDistributionsPaidPerCommonShareLongTermCapitalGain	0.133
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.29
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.24
CY2008	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	10000000.0
CY2019	udr	Shares Reserved For Issuance Under Stock Purchase Plan SharesReservedForIssuanceUnderStockPurchasePlan	11000000.0
CY2018	udr	Taxable Distributions Paid Per Common Share Ordinary Income TaxableDistributionsPaidPerCommonShareOrdinaryIncome	0.774
CY2017	udr	Taxable Distributions Paid Per Common Share Ordinary Income TaxableDistributionsPaidPerCommonShareOrdinaryIncome	1.018
CY2019Q4	us-gaap	Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet	1700000
CY2019	udr	Transfer Between Levels TransferBetweenLevels	0
CY2019	udr	Taxable Distributions Paid Per Common Share Qualified Ordinary Income TaxableDistributionsPaidPerCommonShareQualifiedOrdinaryIncome	0.004
CY2018	udr	Taxable Distributions Paid Per Common Share Qualified Ordinary Income TaxableDistributionsPaidPerCommonShareQualifiedOrdinaryIncome	0.006
CY2019	udr	Share Based Compensation Arrangement By Share Based Payment Award Number Of Unexercised Stock Options ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfUnexercisedStockOptions	0
CY2019	udr	Taxable Distributions Paid Per Common Share Ordinary Income TaxableDistributionsPaidPerCommonShareOrdinaryIncome	0.981
CY2019	udr	Taxable Distributions Paid Per Common Share Unrecapture Section Gain TaxableDistributionsPaidPerCommonShareUnrecaptureSectionGain	0.063
CY2018	udr	Taxable Distributions Paid Per Common Share Unrecapture Section Gain TaxableDistributionsPaidPerCommonShareUnrecaptureSectionGain	0.233
CY2017	udr	Taxable Distributions Paid Per Common Share Unrecapture Section Gain TaxableDistributionsPaidPerCommonShareUnrecaptureSectionGain	0.063
CY2019	udr	Taxable Distributions Paid Per Common Share Nondividend Distributions TaxableDistributionsPaidPerCommonShareNondividendDistributions	0.281
CY2018	udr	Taxable Distributions Paid Per Common Share Nondividend Distributions TaxableDistributionsPaidPerCommonShareNondividendDistributions	0.207
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.350
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.278
CY2017	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.225
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	1018665000
CY2018Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	972740000
CY2018	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	18215000
CY2019	us-gaap	Distributions On Mandatorily Redeemable Securities DistributionsOnMandatorilyRedeemableSecurities	32270000
CY2018	us-gaap	Distributions On Mandatorily Redeemable Securities DistributionsOnMandatorilyRedeemableSecurities	32798000
CY2018	udr	Operating Partnership Units Issued OperatingPartnershipUnitsIssued	4320000
CY2019	udr	Long Term Incentive Plan Operating Partnership Unit Vesting Value LongTermIncentivePlanOperatingPartnershipUnitVestingValue	14742000
CY2018	udr	Long Term Incentive Plan Operating Partnership Unit Vesting Value LongTermIncentivePlanOperatingPartnershipUnitVestingValue	4397000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-826000
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3800000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	700000
CY2019	udr	Increase Decrease In Income Tax Expense Benefit IncreaseDecreaseInIncomeTaxExpenseBenefit	3100000
CY2018	udr	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Alternative Minimum Tax Credit Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017AlternativeMinimumTaxCreditAmount	2000000.0
CY2019	udr	Increase In Income Tax Expense Due To Unrealized Gains On Other Investments IncreaseInIncomeTaxExpenseDueToUnrealizedGainsOnOtherInvestments	1300000
CY2019	udr	Minimum Holding Period Of Redeemable Units For Redemption MinimumHoldingPeriodOfRedeemableUnitsForRedemption	P1Y
CY2018Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	972740000
CY2017Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	948138000
CY2019	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-183884000
CY2018	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-43552000
CY2019	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1	134031000
CY2018	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1	13328000
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	14426000
CY2019Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	3000
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	170917000
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	134168000
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	128711000
CY2017	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-1000
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	6000
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	6000
CY2019Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	3000
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	3000
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	4757000
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	4757000
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	4757000
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	142000
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	142000
CY2019Q4	udr	Cost Incurred To Date CostIncurredToDate	172964000
CY2019Q4	us-gaap	Purchase Commitment Remaining Minimum Amount Committed PurchaseCommitmentRemainingMinimumAmountCommitted	245700000
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2019	udr	Community Threshold Percent Occupancy Threshold CommunityThresholdPercentOccupancyThreshold	90%
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14055000
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11754000
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11482000
CY2019	udr	Segment Reporting Reconciling Items Owned Property Management Costs SegmentReportingReconcilingItemsOwnedPropertyManagementCosts	32721000
CY2018	udr	Segment Reporting Reconciling Items Owned Property Management Costs SegmentReportingReconcilingItemsOwnedPropertyManagementCosts	28465000
CY2017	udr	Segment Reporting Reconciling Items Owned Property Management Costs SegmentReportingReconcilingItemsOwnedPropertyManagementCosts	27068000
CY2019	udr	Other Cost And Expense Operating Including Discontinued Operations OtherCostAndExpenseOperatingIncludingDiscontinuedOperations	13932000
CY2018	udr	Other Cost And Expense Operating Including Discontinued Operations OtherCostAndExpenseOperatingIncludingDiscontinuedOperations	12100000
CY2017	udr	Other Cost And Expense Operating Including Discontinued Operations OtherCostAndExpenseOperatingIncludingDiscontinuedOperations	9060000
CY2019	udr	Segment Reporting Reconciling Items Cost Of Services Depreciation And Amortization SegmentReportingReconcilingItemsCostOfServicesDepreciationAndAmortization	501257000
CY2018	udr	Segment Reporting Reconciling Items Cost Of Services Depreciation And Amortization SegmentReportingReconcilingItemsCostOfServicesDepreciationAndAmortization	429006000
CY2017	udr	Segment Reporting Reconciling Items Cost Of Services Depreciation And Amortization SegmentReportingReconcilingItemsCostOfServicesDepreciationAndAmortization	430054000
CY2019	udr	Other General And Administrative Expense Including Discontinued Operations OtherGeneralAndAdministrativeExpenseIncludingDiscontinuedOperations	51533000
CY2018	udr	Other General And Administrative Expense Including Discontinued Operations OtherGeneralAndAdministrativeExpenseIncludingDiscontinuedOperations	46983000
CY2017	udr	Other General And Administrative Expense Including Discontinued Operations OtherGeneralAndAdministrativeExpenseIncludingDiscontinuedOperations	48566000
CY2019	udr	Casualty Related Recoveries Charges Net CasualtyRelatedRecoveriesChargesNet	474000
CY2018	udr	Casualty Related Recoveries Charges Net CasualtyRelatedRecoveriesChargesNet	2121000
CY2017	udr	Casualty Related Recoveries Charges Net CasualtyRelatedRecoveriesChargesNet	4335000
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	6666000
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	6673000
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	6408000
CY2019	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	5282000
CY2018	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	136197000
CY2017	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	43404000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	137873000
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-5055000
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	31257000
CY2019	us-gaap	Interest Expense InterestExpense	170917000
CY2018	us-gaap	Interest Expense InterestExpense	134168000
CY2017	us-gaap	Interest Expense InterestExpense	128711000
CY2019	udr	Interest And Other Income Including Discontinued Operations InterestAndOtherIncomeIncludingDiscontinuedOperations	15404000
CY2018	udr	Interest And Other Income Including Discontinued Operations InterestAndOtherIncomeIncludingDiscontinuedOperations	6735000
CY2017	udr	Interest And Other Income Including Discontinued Operations InterestAndOtherIncomeIncludingDiscontinuedOperations	1971000
CY2019	udr	Income Tax Expense Benefit Of Reit Subsidiary Net Including Discontinued Operations IncomeTaxExpenseBenefitOfReitSubsidiaryNetIncludingDiscontinuedOperations	3838000
CY2018	udr	Income Tax Expense Benefit Of Reit Subsidiary Net Including Discontinued Operations IncomeTaxExpenseBenefitOfReitSubsidiaryNetIncludingDiscontinuedOperations	688000
CY2017	udr	Income Tax Expense Benefit Of Reit Subsidiary Net Including Discontinued Operations IncomeTaxExpenseBenefitOfReitSubsidiaryNetIncludingDiscontinuedOperations	-240000
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	14426000
CY2018	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	18215000
CY2017	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	10933000
CY2019	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Nonredeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable	188000
CY2018	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Nonredeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable	221000
CY2017	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Nonredeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable	164000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	184965000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	203106000
CY2017	us-gaap	Net Income Loss NetIncomeLoss	121558000
CY2019	udr	Same Store Communities SameStoreCommunities	37959
CY2019Q4	udr	Real Estate Owned Gross RealEstateOwnedGross	12602101000
CY2018Q4	udr	Real Estate Owned Gross RealEstateOwnedGross	10196159000
CY2019Q4	udr	Real Estates Owned Accumulated Depreciation RealEstatesOwnedAccumulatedDepreciation	4131353000
CY2018Q4	udr	Real Estates Owned Accumulated Depreciation RealEstatesOwnedAccumulatedDepreciation	3654160000
CY2019Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	8470748000
CY2018Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	6541999000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8106000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	185216000
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	25185000
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	23675000
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	153650000
CY2018Q4	us-gaap	Notes Receivable Net NotesReceivableNet	42259000
CY2019Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures Fair Value Disclosure InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure	588262000
CY2018Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures Fair Value Disclosure InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure	780869000
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	204225000
CY2019Q4	us-gaap	Other Assets OtherAssets	186296000
CY2018Q4	us-gaap	Other Assets OtherAssets	137710000
CY2019Q4	us-gaap	Assets Assets	9636472000
CY2018Q4	us-gaap	Assets Assets	7711728000
CY2019	udr	Same Store Communities SameStoreCommunities	37959
CY2019Q1	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	267922000
CY2019Q2	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	278463000
CY2019Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	289008000
CY2019Q4	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	302745000
CY2019Q1	us-gaap	Profit Loss ProfitLoss	26602000
CY2019Q2	us-gaap	Profit Loss ProfitLoss	38318000
CY2019Q3	us-gaap	Profit Loss ProfitLoss	29422000
CY2019Q4	us-gaap	Profit Loss ProfitLoss	105237000
CY2019Q1	udr	Adjusted Net Income Loss Available To Common Stockholders Basic AdjustedNetIncomeLossAvailableToCommonStockholdersBasic	23492000
CY2019Q2	udr	Adjusted Net Income Loss Available To Common Stockholders Basic AdjustedNetIncomeLossAvailableToCommonStockholdersBasic	34588000
CY2019Q3	udr	Adjusted Net Income Loss Available To Common Stockholders Basic AdjustedNetIncomeLossAvailableToCommonStockholdersBasic	26173000
CY2019Q4	udr	Adjusted Net Income Loss Available To Common Stockholders Basic AdjustedNetIncomeLossAvailableToCommonStockholdersBasic	96928000
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.08
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.12
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.09
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.08
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.12
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.09
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	277002000
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	281960000
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	288706000
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	293107000
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	277557000
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	282575000
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	289529000
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	294073000
CY2018Q1	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	250483000
CY2018Q2	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	256634000
CY2018Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	263256000
CY2018Q4	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	264732000
CY2018Q1	us-gaap	Profit Loss ProfitLoss	89225000
CY2018Q2	us-gaap	Profit Loss ProfitLoss	22444000
CY2018Q3	us-gaap	Profit Loss ProfitLoss	20258000
CY2018Q4	us-gaap	Profit Loss ProfitLoss	89615000
CY2018Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	80801000
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	19630000
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	17639000
CY2018Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	81168000
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.30
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.07
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.07
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.30
CY2018Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	267546000
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	267311000
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	267727000
CY2018Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	270107000
CY2018Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	269208000
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	268890000
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	268861000
CY2018Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	270755000
CY2019Q4	udr	Number Of Ground Leases Becoming Fixed NumberOfGroundLeasesBecomingFixed	2
CY2019	udr	Transfer Between Levels TransferBetweenLevels	0
CY2016Q4	us-gaap	Limited Partners Capital Account Units Outstanding LimitedPartnersCapitalAccountUnitsOutstanding	183279000
CY2017	udr	Long Term Incentive Plan Operating Partnership Units Vesting Shares LongTermIncentivePlanOperatingPartnershipUnitsVestingShares	72000
CY2017Q4	us-gaap	Limited Partners Capital Account Units Outstanding LimitedPartnersCapitalAccountUnitsOutstanding	183351000
CY2018	udr	Long Term Incentive Plan Operating Partnership Units Vesting Shares LongTermIncentivePlanOperatingPartnershipUnitsVestingShares	286000
CY2018Q4	us-gaap	Limited Partners Capital Account Units Outstanding LimitedPartnersCapitalAccountUnitsOutstanding	183637000
CY2019	udr	Long Term Incentive Plan Operating Partnership Units Vesting Shares LongTermIncentivePlanOperatingPartnershipUnitsVestingShares	427000
CY2019Q4	us-gaap	Limited Partners Capital Account Units Outstanding LimitedPartnersCapitalAccountUnitsOutstanding	184064000
CY2019Q4	udr	Number Of Classes Of Long Term Incentive Plan Units NumberOfClassesOfLongTermIncentivePlanUnits	2
CY2019Q4	srt	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	1149441000
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	2160917000
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	6989866000
CY2019Q4	udr	Real Estate And Accumulated Depreciation Initial Cost Of Land And Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfLandAndBuildingsAndImprovements	9150783000
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionImprovements	3451318000
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	2418222000
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	10183879000
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	12602101000
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	4131353000
CY2019Q4	srt	Real Estate Federal Income Tax Basis RealEstateFederalIncomeTaxBasis	11700000000
CY2018Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	10196159000
CY2017Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	10177206000
CY2016Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	9615753000
CY2019	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	2241163000
CY2017	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	235993000
CY2019	us-gaap	Real Estate Improvements RealEstateImprovements	195981000
CY2018	us-gaap	Real Estate Improvements RealEstateImprovements	214898000
CY2017	us-gaap	Real Estate Improvements RealEstateImprovements	369029000
CY2019	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	31202000
CY2018	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	195945000
CY2017	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	43569000
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	12602101000
CY2018Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	10196159000
CY2017Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	10177206000
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	3654160000
CY2017Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	3330166000
CY2016Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	2923625000
CY2019	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	477193000
CY2018	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	426006000
CY2017	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	424772000
CY2018	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	102012000
CY2017	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	18231000
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	4131353000
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	3654160000
CY2017Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	3330166000

Files In Submission

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udr-20191231ex422d0fba5.htm	Edgar Link	pending
udr-20191231ex423124175.htm	Edgar Link	pending
udr-20191231ex4249bf316.htm	Edgar Link	pending
udr-20191231x10k.htm	Edgar Link	pending
udr-20191231x10k004.jpg	Edgar Link	pending
udr-20191231x10k016.jpg	Edgar Link	pending
udr-20191231x10k_htm.xml	Edgar Link	completed
udr-20191231_cal.xml	Edgar Link	unprocessable
udr-20191231_def.xml	Edgar Link	unprocessable
udr-20191231_lab.xml	Edgar Link	unprocessable
udr-20191231_pre.xml	Edgar Link	unprocessable

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$UDR
UDR, Inc. Stock $udr

2019 Q4 Form 10-K Financial Statement

#000007420820000031 Filed on February 18, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$UDR UDR, Inc. Stock $udr

2019 Q4 Form 10-K Financial Statement

#000007420820000031 Filed on February 18, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$UDR
UDR, Inc. Stock $udr