$EXR
Extra Space Storage Inc. Stock $exr

$exr Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000162828020002202 Filed on February 25, 2020

Income Statement

Concept	2019 Q4	2019	2018 Q4
Revenue	$335.8M	$1.308B	$307.4M
YoY Change	9.26%	9.35%	9.05%
Cost Of Revenue	$95.50M	$336.1M	$79.10M
YoY Change	20.73%	15.21%	8.65%
Gross Profit	$240.3M	$972.4M	$228.2M
YoY Change	5.3%	7.46%	9.13%
Gross Profit Margin	71.56%	74.32%	74.25%
Selling, General & Admin	$20.90M	$114.5M	$18.40M
YoY Change	13.59%	17.56%	-2.13%
% of Gross Profit	8.7%	11.77%	8.06%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$54.80M	$219.9M	$53.20M
YoY Change	3.01%	5.17%	8.13%
% of Gross Profit	22.8%	22.61%	23.31%
Operating Expenses	$75.70M	$334.4M	$71.60M
YoY Change	5.73%	9.1%	5.45%
Operating Profit	$164.6M	$635.0M	$156.7M
YoY Change	5.09%	2.46%	11.03%
Interest Expense	-$41.60M	-$172.5M	-$44.30M
YoY Change	-6.09%	-196.67%	22.71%
% of Operating Profit	-25.27%	-27.17%	-28.27%
Other Income/Expense, Net
YoY Change
Pretax Income	$123.0M	$451.2M	$112.4M
YoY Change	9.43%	2.1%	-49.78%
Income Tax	$2.700M	$11.31M	$3.200M
% Of Pretax Income	2.2%	2.51%	2.85%
Net Earnings	$112.3M	$420.0M	$101.5M
YoY Change	10.66%	1.13%	-53.02%
Net Earnings / Revenue	33.44%	32.1%	33.01%
Basic Earnings Per Share	$0.87	$3.27	$0.80
Diluted Earnings Per Share	$0.86	$3.24	$0.80
COMMON SHARES
Basic Shares Outstanding	129.5M shares	128.2M shares	126.5M shares
Diluted Shares Outstanding		136.4M shares

Balance Sheet

Concept	2019 Q4	2019	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$65.70M	$65.70M	$57.50M
YoY Change	14.26%	14.26%	3.23%
Cash & Equivalents	$65.75M	$65.70M	$57.50M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$65.70M	$65.70M	$57.50M
YoY Change	14.26%	14.26%	3.23%
LONG-TERM ASSETS
Property, Plant & Equipment	$7.962B	$7.962B	$7.492B
YoY Change	6.27%	6.27%	5.04%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$338.1M	$338.1M	$125.3M
YoY Change	169.83%	169.83%	65.09%
Other Assets	$5.000M	$5.000M	$15.20M
YoY Change	-67.11%	-67.11%	-50.0%
Total Long-Term Assets	$8.467B	$8.467B	$7.790B
YoY Change	8.68%	8.68%	5.2%
TOTAL ASSETS
Total Short-Term Assets	$65.70M	$65.70M	$57.50M
Total Long-Term Assets	$8.467B	$8.467B	$7.790B
Total Assets	$8.532B	$8.532B	$7.848B
YoY Change	8.72%	8.72%	5.19%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$111.4M	$111.4M	$101.5M
YoY Change	9.75%	9.75%	5.62%
Accrued Expenses	$274.8M	$274.8M
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$386.2M	$386.2M	$101.5M
YoY Change	280.49%	280.49%	5.62%
LONG-TERM LIABILITIES
Long-Term Debt	$5.047B	$5.047B	$4.812B
YoY Change	4.88%	4.88%	5.65%
Other Long-Term Liabilities	$178.0M	$178.0M	$149.6M
YoY Change	18.98%	18.98%	72.35%
Total Long-Term Liabilities	$5.225B	$5.225B	$4.961B
YoY Change	5.31%	5.31%	6.9%
TOTAL LIABILITIES
Total Short-Term Liabilities	$386.2M	$386.2M	$101.5M
Total Long-Term Liabilities	$5.225B	$5.225B	$4.961B
Total Liabilities	$5.611B	$5.992B	$5.063B
YoY Change	10.83%	10.27%	6.87%
SHAREHOLDERS EQUITY
Retained Earnings	-$301.0M		-$262.9M
YoY Change	14.51%		3.8%
Common Stock	$2.870B		$2.642B
YoY Change	8.63%		2.77%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.540B	$2.540B	$2.414B
YoY Change
Total Liabilities & Shareholders Equity	$8.532B	$8.532B	$7.848B
YoY Change	8.72%	8.72%	5.19%

Cashflow Statement

Concept	2019 Q4	2019	2018 Q4
OPERATING ACTIVITIES
Net Income	$112.3M	$420.0M	$101.5M
YoY Change	10.66%	1.13%	-53.02%
Depreciation, Depletion And Amortization	$54.80M	$219.9M	$53.20M
YoY Change	3.01%	5.17%	8.13%
Cash From Operating Activities	$163.2M	$707.7M	$148.8M
YoY Change	9.68%	4.41%	0.68%
INVESTING ACTIVITIES
Capital Expenditures	-$84.50M	-$411.0M	-$116.0M
YoY Change	-27.16%	-16.36%	-78.81%
Acquisitions
YoY Change
Other Investing Activities	-$180.8M	-$210.7M	-$10.90M
YoY Change	1558.72%	-543.58%	-103.91%
Cash From Investing Activities	-$265.2M	-$621.6M	-$126.9M
YoY Change	108.98%	40.04%	-52.77%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		-$198.8M
YoY Change		120.35%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	106.1M	-$88.01M	-15.80M
YoY Change	-771.52%	-64.4%	-112.54%
NET CHANGE
Cash From Operating Activities	163.2M	$707.7M	148.8M
Cash From Investing Activities	-265.2M	-$621.6M	-126.9M
Cash From Financing Activities	106.1M	-$88.01M	-15.80M
Net Change In Cash	4.100M	-$1.957M	6.100M
YoY Change	-32.79%	-85.35%	19.61%
FREE CASH FLOW
Cash From Operating Activities	$163.2M	$707.7M	$148.8M
Capital Expenditures	-$84.50M	-$411.0M	-$116.0M
Free Cash Flow	$247.7M	$1.119B	$264.8M
YoY Change	-6.46%	-4.32%	-61.92%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0001289490
CY2019	exr	Average Closing Market Price Measurement Period AverageClosingMarketPriceMeasurementPeriod	P10D
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CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	3.56
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	127103750	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	127103750	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	129534407	shares
CY2019Q4	us-gaap	Lessor Operating Lease Term Of Contract LessorOperatingLeaseTermOfContract	P25Y
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
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CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
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CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
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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	001-32269
CY2019	dei	Entity Registrant Name EntityRegistrantName	EXTRA SPACE STORAGE INC.
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	20-1076777
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	2795 East Cottonwood Parkway, Suite 300
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Salt Lake City
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	UT
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	84121
CY2019	dei	City Area Code CityAreaCode	801
CY2019	dei	Local Phone Number LocalPhoneNumber	365-4600
CY2019	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value
CY2019	dei	Trading Symbol TradingSymbol	EXR
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
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
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CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
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CY2018	us-gaap	Profit Loss ProfitLoss	447080000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	514222000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-66843000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	1430000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	17308000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	384280000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	448510000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	531530000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	27929000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	31861000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	35997000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	356351000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2596166000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1266000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	11161000	USD
CY2017	exr	Noncontrolling Interest Increase From Transactions With Other Noncontrolling Interests Net NoncontrollingInterestIncreaseFromTransactionsWithOtherNoncontrollingInterestsNet	216000	USD
CY2017	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	6189000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	514222000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	17308000	USD
CY2017	us-gaap	Partners Capital Account Distributions PartnersCapitalAccountDistributions	31972000	USD
CY2017	us-gaap	Dividends Common Stock DividendsCommonStock	393040000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2723807000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2723807000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	416649000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	495533000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9561000	USD
CY2017	us-gaap	Partners Capital Account Acquisitions PartnersCapitalAccountAcquisitions	7618000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1169000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	1000	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	90231000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	11176000	USD
CY2018	exr	Noncontrolling Interest Repayment Of Receivable For Preferred Operating Units Pledged As Collateral On Loan NoncontrollingInterestRepaymentOfReceivableForPreferredOperatingUnitsPledgedAsCollateralOnLoan	495000	USD
CY2018	us-gaap	Partners Capital Account Acquisitions PartnersCapitalAccountAcquisitions	1877000	USD
CY2018	exr	Noncontrolling Interest Increase From Transactions With Other Noncontrolling Interests Net NoncontrollingInterestIncreaseFromTransactionsWithOtherNoncontrollingInterestsNet	122000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	31251000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	447080000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1430000	USD
CY2018	us-gaap	Partners Capital Account Distributions PartnersCapitalAccountDistributions	33250000	USD
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	424907000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2785422000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2785422000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	3063000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	2000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	198827000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	13051000	USD
CY2019	exr	Noncontrolling Interest Repayment Of Receivable For Preferred Operating Units Pledged As Collateral On Loan NoncontrollingInterestRepaymentOfReceivableForPreferredOperatingUnitsPledgedAsCollateralOnLoan	1211000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	28022000	USD
CY2019	exr	Noncontrolling Interest Increase From Transactions With Other Noncontrolling Interests Net NoncontrollingInterestIncreaseFromTransactionsWithOtherNoncontrollingInterestsNet	173000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	451123000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-66843000	USD
CY2019	us-gaap	Partners Capital Account Distributions PartnersCapitalAccountDistributions	34243000	USD
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	458114000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2921694000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	451123000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	447080000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	514222000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	219857000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	209050000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	193296000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	11989000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	14286000	USD
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	12289000	USD
CY2019	exr	Amortization Of Debt Discount Premium Equity Component Of Senior Notes AmortizationOfDebtDiscountPremiumEquityComponentOfSeniorNotes	4742000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-6358000	USD
CY2017	exr	Gains Losses On Real Estate Transactions Net Of Impairment Of Real Estate GainsLossesOnRealEstateTransactionsNetOfImpairmentOfRealEstate	112789000	USD
CY2018	exr	Amortization Of Debt Discount Premium Equity Component Of Senior Notes AmortizationOfDebtDiscountPremiumEquityComponentOfSeniorNotes	4687000	USD
CY2017	exr	Amortization Of Debt Discount Premium Equity Component Of Senior Notes AmortizationOfDebtDiscountPremiumEquityComponentOfSeniorNotes	5103000	USD
CY2019	exr	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	1064000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	13051000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	11176000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	9561000	USD
CY2019	exr	Gains Losses On Real Estate Transactions Net Of Impairment Of Real Estate GainsLossesOnRealEstateTransactionsNetOfImpairmentOfRealEstate	1205000	USD
CY2018	exr	Gains Losses On Real Estate Transactions Net Of Impairment Of Real Estate GainsLossesOnRealEstateTransactionsNetOfImpairmentOfRealEstate	30807000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-6867000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-4567000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	12482000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1664000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	12728000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	15522000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	2736000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-10515000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-2333000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	14384000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-5631000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	707686000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	677795000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	597375000	USD
CY2019	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	349494000	USD
CY2018	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	426388000	USD
CY2017	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	653185000	USD
CY2019	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	53717000	USD
CY2018	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	60677000	USD
CY2017	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	31746000	USD
CY2019	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	11254000	USD
CY2018	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	52458000	USD
CY2017	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	312165000	USD
CY2019	exr	Payments For Investment In Unconsolidated Real Estate Entities PaymentsForInvestmentInUnconsolidatedRealEstateEntities	197759000	USD
CY2018	exr	Payments For Investment In Unconsolidated Real Estate Entities PaymentsForInvestmentInUnconsolidatedRealEstateEntities	65500000	USD
CY2017	exr	Payments For Investment In Unconsolidated Real Estate Entities PaymentsForInvestmentInUnconsolidatedRealEstateEntities	17944000	USD
CY2019	exr	Return Of Investment Real Estate Ventures ReturnOfInvestmentRealEstateVentures	3982000	USD
CY2018	exr	Return Of Investment Real Estate Ventures ReturnOfInvestmentRealEstateVentures	49130000	USD
CY2017	exr	Return Of Investment Real Estate Ventures ReturnOfInvestmentRealEstateVentures	581000	USD
CY2019	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	185993000	USD
CY2018	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	13850000	USD
CY2017	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	0	USD
CY2019	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	157861000	USD
CY2018	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	25226000	USD
CY2017	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	44869000	USD
CY2019	us-gaap	Payments To Acquire Furniture And Fixtures PaymentsToAcquireFurnitureAndFixtures	7764000	USD
CY2018	us-gaap	Payments To Acquire Furniture And Fixtures PaymentsToAcquireFurnitureAndFixtures	4297000	USD
CY2017	us-gaap	Payments To Acquire Furniture And Fixtures PaymentsToAcquireFurnitureAndFixtures	7819000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-621630000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-443898000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-353079000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	198827000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	90231000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	2214000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	1413030000	USD
CY2017	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	1325623000	USD
CY2019	us-gaap	Repayments Of Debt RepaymentsOfDebt	1977805000	USD
CY2018	us-gaap	Repayments Of Debt RepaymentsOfDebt	1109854000	USD
CY2017	us-gaap	Repayments Of Debt RepaymentsOfDebt	1088679000	USD
CY2019	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	30928000	USD
CY2018	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	88662000	USD
CY2017	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	0	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	2986000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	12302000	USD
CY2017	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	6967000	USD
CY2019	exr	Repayments Of Debt Instruments RepaymentsOfDebtInstruments	0	USD
CY2018	exr	Repayments Of Debt Instruments RepaymentsOfDebtInstruments	80270000	USD
CY2017	exr	Repayments Of Debt Instruments RepaymentsOfDebtInstruments	19916000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	3063000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1169000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1266000	USD
CY2019	exr	Cash Portion Of Redemption Of Preferred Operating Partnership Units CashPortionOfRedemptionOfPreferredOperatingPartnershipUnits	0	USD
CY2018	exr	Cash Portion Of Redemption Of Preferred Operating Partnership Units CashPortionOfRedemptionOfPreferredOperatingPartnershipUnits	2558000	USD
CY2017	exr	Cash Portion Of Redemption Of Preferred Operating Partnership Units CashPortionOfRedemptionOfPreferredOperatingPartnershipUnits	2510000	USD
CY2019	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	173000	USD
CY2018	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	122000	USD
CY2017	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	201000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	458114000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	424907000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	393040000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	34243000	USD
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	33250000	USD
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.74
CY2017	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	31972000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-88013000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-247251000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-215994000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1957000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-13354000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	28302000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	72690000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	86044000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	57742000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	70733000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	72690000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	86044000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	174155000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	159474000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	136202000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	10359000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	730000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	5648000	USD
CY2019	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	13057000	USD
CY2018	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	1337000	USD
CY2019	exr	Redemption Of Operating Partnership Units For Common Stock Including Additional Paid In Capital RedemptionOfOperatingPartnershipUnitsForCommonStockIncludingAdditionalPaidInCapital	13057000	USD
CY2018	exr	Redemption Of Operating Partnership Units For Common Stock Including Additional Paid In Capital RedemptionOfOperatingPartnershipUnitsForCommonStockIncludingAdditionalPaidInCapital	1337000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	277557000	USD
CY2019	exr	Establishment Of Operating Lease Liability EstablishmentOfOperatingLeaseLiability	286914000	USD
CY2019	exr	Establishment Of Operating Lease Right Of Use Assets And Lease Liabilities Increase Decrease In Accounts Payable And Accrued Expenses EstablishmentOfOperatingLeaseRightOfUseAssetsAndLeaseLiabilitiesIncreaseDecreaseInAccountsPayableAndAccruedExpenses	9357000	USD
CY2019	exr	Noncash Or Part Noncash Acquisition Net Real Estate Assets Acquired NoncashOrPartNoncashAcquisitionNetRealEstateAssetsAcquired	21066000	USD
CY2018	exr	Noncash Or Part Noncash Acquisition Net Real Estate Assets Acquired NoncashOrPartNoncashAcquisitionNetRealEstateAssetsAcquired	88842000	USD
CY2017	exr	Noncash Or Part Noncash Acquisition Net Real Estate Assets Acquired NoncashOrPartNoncashAcquisitionNetRealEstateAssetsAcquired	51455000	USD
CY2018	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	1877000	USD
CY2017	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	14428000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	17157000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	87500000	USD
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	24055000	USD
CY2019	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	2780000	USD
CY2018	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	-535000	USD
CY2017	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	12957000	USD
CY2017	exr	Increase Decrease Of Other Noncontrolling Interest Due To Acquisitions IncreaseDecreaseOfOtherNoncontrollingInterestDueToAcquisitions	-15000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	1129000	USD
CY2019	exr	Real Estate Additions Portion Not Yet Paid RealEstateAdditionsPortionNotYetPaid	2203000	USD
CY2018	exr	Real Estate Additions Portion Not Yet Paid RealEstateAdditionsPortionNotYetPaid	778000	USD
CY2017	exr	Real Estate Additions Portion Not Yet Paid RealEstateAdditionsPortionNotYetPaid	3509000	USD
CY2019	exr	Construction In Progress Additions Portion Not Yet Paid ConstructionInProgressAdditionsPortionNotYetPaid	1601000	USD
CY2018	exr	Construction In Progress Additions Portion Not Yet Paid ConstructionInProgressAdditionsPortionNotYetPaid	554000	USD
CY2017	exr	Construction In Progress Additions Portion Not Yet Paid ConstructionInProgressAdditionsPortionNotYetPaid	1703000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	3804000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1332000	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	5212000	USD
CY2019	exr	Non Cash Decrease In Investments In Unconsolidated Entities NonCashDecreaseInInvestmentsInUnconsolidatedEntities	28022000	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	28022000	USD
CY2017	us-gaap	Stock Issued1 StockIssued1	4351000	USD
CY2017	exr	Investments In Unconsolidated Real Estate Ventures Acquired Contribution InvestmentsInUnconsolidatedRealEstateVenturesAcquiredContribution	4351000	USD
CY2019	exr	Conversion Of Preferred Operating Units To Common Units ConversionOfPreferredOperatingUnitsToCommonUnits	4374000	USD
CY2018	exr	Conversion Of Preferred Operating Units To Common Units ConversionOfPreferredOperatingUnitsToCommonUnits	6851000	USD
CY2019	exr	Issuance Of Common Units For Conversion Of Preferred Units IssuanceOfCommonUnitsForConversionOfPreferredUnits	4374000	USD
CY2018	exr	Issuance Of Common Units For Conversion Of Preferred Units IssuanceOfCommonUnitsForConversionOfPreferredUnits	6851000	USD
CY2019	us-gaap	Nature Of Operations NatureOfOperations	DESCRIPTION OF BUSINESS<div style="line-height:120%;padding-top:8px;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Extra Space Storage Inc. (the “Company”) is a fully integrated, self-administered and self-managed real estate investment trust (“REIT”), formed as a Maryland corporation on April 30, 2004, to own, operate, manage, acquire, develop and redevelop professionally managed self-storage properties located throughout the United States. The Company was formed to continue the business of Extra Space Storage LLC and its subsidiaries, which had engaged in the self-storage business since 1977. The Company’s interest in its stores is held through its operating partnership, Extra Space Storage LP (the “Operating Partnership”), which was formed on May 5, 2004. The Company’s primary assets are general partner and limited partner interests in the Operating Partnership. This structure is commonly referred to as an umbrella partnership REIT, or UPREIT. </span></div><div style="line-height:120%;padding-top:16px;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The Company invests in stores by acquiring wholly-owned stores or by acquiring an equity interest in real estate entities. At </span><span style="font-family:inherit;font-size:10pt;">December 31, 2019</span><span style="font-family:inherit;font-size:10pt;">, the Company had direct and indirect equity interests in </span><span style="font-family:inherit;font-size:10pt;"><span>1,171</span></span><span style="font-family:inherit;font-size:10pt;"> storage facilities. In addition, the Company managed </span><span style="font-family:inherit;font-size:10pt;"><span>646</span></span><span style="font-family:inherit;font-size:10pt;"> stores for third parties bringing the total number of stores which it owns and/or manages to </span><span style="font-family:inherit;font-size:10pt;"><span>1,817</span></span><span style="font-family:inherit;font-size:10pt;">. These stores are located in </span><span style="font-family:inherit;font-size:10pt;"><span>40</span></span><span style="font-family:inherit;font-size:10pt;"> states, Washington, D.C. and Puerto Rico. The Company also offers tenant reinsurance at its owned and managed stores that insures the value of goods in the storage units.</span></div>
CY2019Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	1171	store
CY2019Q4	exr	Number Of Real Estate Properties Franchisees And Others NumberOfRealEstatePropertiesFranchiseesAndOthers	646	store
CY2019Q4	exr	Number Of Real Estate Properties Owned And Or Managed NumberOfRealEstatePropertiesOwnedAndOrManaged	1817	store
CY2019Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	40	state
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;padding-top:24px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates</span></div><div style="line-height:120%;padding-top:8px;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</span></div>
CY2019	exr	Number Of Leased Properties That Cannot Be Classified As Ground Or Building Leases NumberOfLeasedPropertiesThatCannotBeClassifiedAsGroundOrBuildingLeases	3	store
CY2019	exr	Number Of Properties Related To Ground Leases Assumed By The Entity At Rates Lower Than Current Market Rates NumberOfPropertiesRelatedToGroundLeasesAssumedByTheEntityAtRatesLowerThanCurrentMarketRates	8	store
CY2018	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	15800000	USD
CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	5167000	USD
CY2016Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	3896000	USD
CY2019	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	16280000	USD
CY2019	exr	Economic Risk Number Of Components EconomicRiskNumberOfComponents	3	item
CY2019Q4	exr	Tenant Reinsurance Policy Minimum Amount Of Insurance Coverage TenantReinsurancePolicyMinimumAmountOfInsuranceCoverage	2000	USD
CY2019Q4	exr	Tenant Reinsurance Policy Maximum Amount Of Insurance Coverage TenantReinsurancePolicyMaximumAmountOfInsuranceCoverage	10000	USD
CY2019Q4	exr	Tenant Reinsurance Policy Average Amount Of Insurance Coverage TenantReinsurancePolicyAverageAmountOfInsuranceCoverage	3300	USD
CY2019	exr	Number Of Claims Made Under Tenant Reinsurance Program NumberOfClaimsMadeUnderTenantReinsuranceProgram	9059	claim
CY2018	exr	Number Of Claims Made Under Tenant Reinsurance Program NumberOfClaimsMadeUnderTenantReinsuranceProgram	8091	claim
CY2017	exr	Number Of Claims Made Under Tenant Reinsurance Program NumberOfClaimsMadeUnderTenantReinsuranceProgram	6214	claim
CY2019	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	The following table presents information on the portion of the Company’s unpaid claims liability, which is included in other liabilities on the Company's consolidated balance sheets, that relates to tenant insurance for the periods indicated:<div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:99.80506822612085%;border-collapse:collapse;text-align:left;"><tr><td colspan="12"/></tr><tr><td style="width:59%;"/><td style="width:1%;"/><td style="width:11%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:11%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:11%;"/><td style="width:1%;"/></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;"> </span></div></td><td colspan="11" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:center;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;font-weight:bold;">For the Year Ended December 31,</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;font-weight:bold;">Tenant Reinsurance Claims:</span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;font-weight:bold;">2019</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;font-weight:bold;">2018</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;font-weight:bold;">2017</span></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Unpaid claims liability at beginning of year</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>7,326</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>5,167</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>3,896</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:12px;text-indent:-12px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Claims and claim adjustment expense for claims incurred in the current year</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>16,280</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>15,800</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>11,700</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:12px;text-indent:-12px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Claims and claim adjustment expense (benefit) for claims incurred in the prior years</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>98</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>107</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(203</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Payments for current year claims</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(11,352</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(11,010</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(8,895</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Payments for prior year claims</span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(4,243</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(2,738</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(1,331</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Unpaid claims liability at the end of the year</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>8,109</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>7,326</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>5,167</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr></table></div><span style="font-family:inherit;font-size:10pt;"><br/></span></div>
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	7326000	USD
CY2017	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	11700000	USD
CY2019	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	98000	USD
CY2018	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	107000	USD
CY2017	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-203000	USD
CY2019	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	11352000	USD
CY2018	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	11010000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	8895000	USD
CY2019	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	4243000	USD
CY2018	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	2738000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	1331000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	8109000	USD
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	7326000	USD
CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	5167000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	25106000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	16153000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	14410000	USD
CY2019	exr	Percentage Of All Distributions To Stockholders Which Classifies As Return Of Capital PercentageOfAllDistributionsToStockholdersWhichClassifiesAsReturnOfCapital	0
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
CY2019	exr	Average Share Price Per Share AverageSharePricePerShare	106.57
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1795632	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	910309	shares
CY2019	us-gaap	Net Income Loss NetIncomeLoss	419967000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	415289000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	479013000	USD
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1474558	shares
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	680000	USD
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	723000	USD
CY2017	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	975000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	419287000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	414566000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	478038000	USD
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	-680000	USD
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	-723000	USD
CY2017	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	USD
CY2019	exr	Net Income Loss Attributable To Noncontrolling Interest In Operating Partnership NetIncomeLossAttributableToNoncontrollingInterestInOperatingPartnership	23727000	USD
CY2018	exr	Net Income Loss Attributable To Noncontrolling Interest In Operating Partnership NetIncomeLossAttributableToNoncontrollingInterestInOperatingPartnership	22831000	USD
CY2017	exr	Net Income Loss Attributable To Noncontrolling Interest In Operating Partnership NetIncomeLossAttributableToNoncontrollingInterestInOperatingPartnership	30088000	USD
CY2019	exr	Income Loss Attributable To Noncontrolling Interest Fixed Component IncomeLossAttributableToNoncontrollingInterestFixedComponent	2288000	USD
CY2018	exr	Income Loss Attributable To Noncontrolling Interest Fixed Component IncomeLossAttributableToNoncontrollingInterestFixedComponent	2288000	USD
CY2017	exr	Income Loss Attributable To Noncontrolling Interest Fixed Component IncomeLossAttributableToNoncontrollingInterestFixedComponent	3119000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	441406000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	435832000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	505007000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	128203568	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	126087487	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	125967831	shares
CY2019	exr	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	6006114	shares
CY2018	exr	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	5675547	shares
CY2017	exr	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	5590831	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	212402	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	244215	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	0	shares
CY2019	exr	Incremental Common Shares Attributable To Share Based Payment Arrangements Stock Options IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsStockOptions	1136205	shares
CY2018	exr	Incremental Common Shares Attributable To Share Based Payment Arrangements Stock Options IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsStockOptions	276304	shares
CY2017	exr	Incremental Common Shares Attributable To Share Based Payment Arrangements Stock Options IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsStockOptions	640068	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	136433769	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	133159033	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	134155771	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.27
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.29
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.79
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.24
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.27
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.76
CY2019Q4	us-gaap	Land Land	1935551000	USD
CY2018Q4	us-gaap	Land Land	1825133000	USD
CY2019Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	3372000	USD
CY2018Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	7359000	USD
CY2019Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	7047654000	USD
CY2018Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	6743355000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	8050000	USD
CY2019Q4	exr	Real Estate Investment Property Intangible Tenant Relationships RealEstateInvestmentPropertyIntangibleTenantRelationships	122489000	USD
CY2018Q4	exr	Real Estate Investment Property Intangible Tenant Relationships RealEstateInvestmentPropertyIntangibleTenantRelationships	119557000	USD
CY2019Q4	exr	Real Estate Investment Property Intangible Lease Rights RealEstateInvestmentPropertyIntangibleLeaseRights	12443000	USD
CY2018Q4	exr	Real Estate Investment Property Intangible Lease Rights RealEstateInvestmentPropertyIntangibleLeaseRights	12443000	USD
CY2019Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	9129559000	USD
CY2018Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	8707847000	USD
CY2019Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1473852000	USD
CY2018Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1262438000	USD
CY2019Q4	exr	Net Operating Real Estate Assets NetOperatingRealEstateAssets	7655707000	USD
CY2018Q4	exr	Net Operating Real Estate Assets NetOperatingRealEstateAssets	7445409000	USD
CY2019Q4	us-gaap	Development In Process DevelopmentInProcess	41157000	USD
CY2018Q4	us-gaap	Development In Process DevelopmentInProcess	46422000	USD
CY2019Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	7696864000	USD
CY2018Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	7491831000	USD
CY2019Q4	us-gaap	Real Estate Heldforsale RealEstateHeldforsale	2947000	USD
CY2018Q4	us-gaap	Real Estate Heldforsale RealEstateHeldforsale	13032000	USD
CY2019Q4	exr	Number Of Parcels Of Land Held For Sale NumberOfParcelsOfLandHeldForSale	1	land_parcel
CY2019	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P18M
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6614000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9050000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	14349000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	127712000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	121238000	USD
CY2019Q4	exr	Number Of Real Estate Properties Acquired NumberOfRealEstatePropertiesAcquired	5	store
CY2019Q4	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	51278000	USD
CY2019Q4	exr	Payments To Acquire Assets Gross PaymentsToAcquireAssetsGross	51058000	USD
CY2019Q4	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
CY2019Q4	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	0	USD
CY2019Q4	exr	Real Estate Property Acquisition Increase Assets Acquired And Liabilities Assumed Net RealEstatePropertyAcquisitionIncreaseAssetsAcquiredAndLiabilitiesAssumedNet	-220000	USD
CY2019Q4	exr	Real Estate Property Asset Acquisition Consideration Transferred Equity Interest Issued Or Issuable RealEstatePropertyAssetAcquisitionConsiderationTransferredEquityInterestIssuedOrIssuable	0	USD
CY2019Q4	us-gaap	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued1 NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1	0	shares
CY2019Q4	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	51278000	USD
CY2019Q3	exr	Number Of Real Estate Properties Acquired NumberOfRealEstatePropertiesAcquired	1	store
CY2019Q3	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	16937000	USD
CY2019Q3	exr	Payments To Acquire Assets Gross PaymentsToAcquireAssetsGross	16941000	USD
CY2019Q3	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
CY2019Q3	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	0	USD
CY2019Q3	exr	Real Estate Property Acquisition Increase Assets Acquired And Liabilities Assumed Net RealEstatePropertyAcquisitionIncreaseAssetsAcquiredAndLiabilitiesAssumedNet	4000	USD
CY2019Q3	exr	Real Estate Property Asset Acquisition Consideration Transferred Equity Interest Issued Or Issuable RealEstatePropertyAssetAcquisitionConsiderationTransferredEquityInterestIssuedOrIssuable	0	USD
CY2019Q3	us-gaap	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued1 NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1	0	shares
CY2019Q3	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	16937000	USD
CY2019Q2	exr	Number Of Real Estate Properties Acquired NumberOfRealEstatePropertiesAcquired	1	store
CY2019Q2	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	8424000	USD
CY2019Q2	exr	Payments To Acquire Assets Gross PaymentsToAcquireAssetsGross	8424000	USD
CY2019Q2	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
CY2019Q2	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	0	USD
CY2019Q2	exr	Real Estate Property Acquisition Increase Assets Acquired And Liabilities Assumed Net RealEstatePropertyAcquisitionIncreaseAssetsAcquiredAndLiabilitiesAssumedNet	0	USD
CY2019Q2	exr	Real Estate Property Asset Acquisition Consideration Transferred Equity Interest Issued Or Issuable RealEstatePropertyAssetAcquisitionConsiderationTransferredEquityInterestIssuedOrIssuable	0	USD
CY2019	exr	Real Estate Property Asset Acquisition Consideration Transferred Equity Interest Issued Or Issuable RealEstatePropertyAssetAcquisitionConsiderationTransferredEquityInterestIssuedOrIssuable	0	USD
CY2019Q2	us-gaap	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued1 NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1	0	shares
CY2019Q2	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	8424000	USD
CY2019Q1	exr	Number Of Real Estate Properties Acquired NumberOfRealEstatePropertiesAcquired	14	store
CY2019Q1	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	223740000	USD
CY2019Q1	exr	Payments To Acquire Assets Gross PaymentsToAcquireAssetsGross	202890000	USD
CY2019Q1	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	17157000	USD
CY2019Q1	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	2780000	USD
CY2019Q1	exr	Real Estate Property Acquisition Increase Assets Acquired And Liabilities Assumed Net RealEstatePropertyAcquisitionIncreaseAssetsAcquiredAndLiabilitiesAssumedNet	-913000	USD
CY2019Q1	exr	Real Estate Property Asset Acquisition Consideration Transferred Equity Interest Issued Or Issuable RealEstatePropertyAssetAcquisitionConsiderationTransferredEquityInterestIssuedOrIssuable	0	USD
CY2019Q1	us-gaap	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued1 NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1	0	shares
CY2019Q1	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	223740000	USD
CY2019	exr	Number Of Real Estate Properties Acquired NumberOfRealEstatePropertiesAcquired	21	store
CY2019	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	300379000	USD
CY2019	exr	Payments To Acquire Assets Gross PaymentsToAcquireAssetsGross	279313000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	17157000	USD
CY2019	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	2780000	USD
CY2019	exr	Real Estate Property Acquisition Increase Assets Acquired And Liabilities Assumed Net RealEstatePropertyAcquisitionIncreaseAssetsAcquiredAndLiabilitiesAssumedNet	-1129000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued1 NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1	0	shares
CY2019	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	300379000	USD
CY2018Q4	exr	Number Of Real Estate Properties Acquired NumberOfRealEstatePropertiesAcquired	6	store
CY2018Q4	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	74852000	USD
CY2018Q4	exr	Payments To Acquire Assets Gross PaymentsToAcquireAssetsGross	74868000	USD
CY2018Q4	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
CY2018Q4	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	0	USD
CY2018Q4	exr	Real Estate Property Acquisition Increase Assets Acquired And Liabilities Assumed Net RealEstatePropertyAcquisitionIncreaseAssetsAcquiredAndLiabilitiesAssumedNet	16000	USD
CY2018Q4	exr	Real Estate Property Asset Acquisition Consideration Transferred Equity Interest Issued Or Issuable RealEstatePropertyAssetAcquisitionConsiderationTransferredEquityInterestIssuedOrIssuable	0	USD
CY2018Q4	us-gaap	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued1 NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1	0	shares
CY2018Q4	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	74852000	USD
CY2018Q3	exr	Number Of Real Estate Properties Acquired NumberOfRealEstatePropertiesAcquired	6	store
CY2018Q3	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	74694000	USD
CY2018Q3	exr	Payments To Acquire Assets Gross PaymentsToAcquireAssetsGross	71989000	USD
CY2018Q3	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
CY2018Q3	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	0	USD
CY2018Q3	exr	Real Estate Property Acquisition Increase Assets Acquired And Liabilities Assumed Net RealEstatePropertyAcquisitionIncreaseAssetsAcquiredAndLiabilitiesAssumedNet	-2705000	USD
CY2018Q3	exr	Real Estate Property Asset Acquisition Consideration Transferred Equity Interest Issued Or Issuable RealEstatePropertyAssetAcquisitionConsiderationTransferredEquityInterestIssuedOrIssuable	0	USD
CY2018Q3	us-gaap	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued1 NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1	0	shares
CY2018Q3	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	74694000	USD
CY2018Q2	exr	Number Of Real Estate Properties Acquired NumberOfRealEstatePropertiesAcquired	17	store
CY2018Q2	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	237284000	USD
CY2018Q2	exr	Payments To Acquire Assets Gross PaymentsToAcquireAssetsGross	148650000	USD
CY2018	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	457617000	USD
CY2018	exr	Number Of Real Estate Properties Acquired NumberOfRealEstatePropertiesAcquired	34	store
CY2018Q2	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	87500000	USD
CY2018Q2	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	-1024000	USD
CY2018Q2	exr	Real Estate Property Acquisition Increase Assets Acquired And Liabilities Assumed Net RealEstatePropertyAcquisitionIncreaseAssetsAcquiredAndLiabilitiesAssumedNet	-281000	USD
CY2018Q2	exr	Real Estate Property Asset Acquisition Consideration Transferred Equity Interest Issued Or Issuable RealEstatePropertyAssetAcquisitionConsiderationTransferredEquityInterestIssuedOrIssuable	1877000	USD
CY2018Q2	us-gaap	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued1 NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1	21768	shares
CY2018Q2	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	237284000	USD
CY2018Q1	exr	Number Of Real Estate Properties Acquired NumberOfRealEstatePropertiesAcquired	5	store
CY2018Q1	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	70787000	USD
CY2018Q1	exr	Payments To Acquire Assets Gross PaymentsToAcquireAssetsGross	70171000	USD
CY2018Q1	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
CY2018Q1	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	489000	USD
CY2018Q1	exr	Real Estate Property Acquisition Increase Assets Acquired And Liabilities Assumed Net RealEstatePropertyAcquisitionIncreaseAssetsAcquiredAndLiabilitiesAssumedNet	-127000	USD
CY2018Q1	exr	Real Estate Property Asset Acquisition Consideration Transferred Equity Interest Issued Or Issuable RealEstatePropertyAssetAcquisitionConsiderationTransferredEquityInterestIssuedOrIssuable	0	USD
CY2018Q1	us-gaap	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued1 NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1	0	shares
CY2018Q1	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	70787000	USD
CY2018	exr	Payments To Acquire Assets Gross PaymentsToAcquireAssetsGross	365678000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	87500000	USD
CY2018	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	-535000	USD
CY2018	exr	Real Estate Property Acquisition Increase Assets Acquired And Liabilities Assumed Net RealEstatePropertyAcquisitionIncreaseAssetsAcquiredAndLiabilitiesAssumedNet	-3097000	USD
CY2018	exr	Real Estate Property Asset Acquisition Consideration Transferred Equity Interest Issued Or Issuable RealEstatePropertyAssetAcquisitionConsiderationTransferredEquityInterestIssuedOrIssuable	1877000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Shares Issued1 NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1	21768	shares
CY2018	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	457617000	USD
CY2019	exr	Number Of Real Estate Properties Acquired Previous Noncontrolling Interest Held NumberOfRealEstatePropertiesAcquiredPreviousNoncontrollingInterestHeld	12	store
CY2018	exr	Number Of Real Estate Properties Acquired Previous Noncontrolling Interest Held NumberOfRealEstatePropertiesAcquiredPreviousNoncontrollingInterestHeld	15	store
CY2019Q4	exr	Equity Method Investment Number Of Properties EquityMethodInvestmentNumberOfProperties	241	property
CY2019Q4	exr	Investment In Unconsolidated Real Estate Entities Net Of Distributions InvestmentInUnconsolidatedRealEstateEntitiesNetOfDistributions	292790000	USD
CY2018Q4	exr	Investment In Unconsolidated Real Estate Entities Net Of Distributions InvestmentInUnconsolidatedRealEstateEntitiesNetOfDistributions	80129000	USD
CY2019Q4	exr	Number Of Operating Stores Owned NumberOfOperatingStoresOwned	16	store
CY2019Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	19663000	USD
CY2018Q4	exr	Number Of Operating Stores Owned NumberOfOperatingStoresOwned	28	store
CY2019	exr	Number Of Real Estate Properties Acquired By Joint Ventures NumberOfRealEstatePropertiesAcquiredByJointVentures	15	store
CY2019	exr	Number Of Stores Acquired At Issuance Of Certificate Of Occupancy NumberOfStoresAcquiredAtIssuanceOfCertificateOfOccupancy	9	store
CY2018Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	63723000	USD
CY2017Q4	exr	Number Of Operating Stores Owned NumberOfOperatingStoresOwned	39	store
CY2017Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	13341000	USD
CY2019	exr	Contributions To Equity Method Investments Including Noncash Amounts ContributionsToEquityMethodInvestmentsIncludingNoncashAmounts	104338000	USD
CY2019Q4	exr	Noncontrolling Interest Operating Partnership Units Redeemed For Common Stock NoncontrollingInterestOperatingPartnershipUnitsRedeemedForCommonStock	340182	shares
CY2018Q4	exr	Noncontrolling Interest Operating Partnership Units Redeemed For Common Stock NoncontrollingInterestOperatingPartnershipUnitsRedeemedForCommonStock	35000	shares
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	11274000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	14452000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	15331000	USD
CY2019Q4	us-gaap	Equity Method Investment Difference Between Carrying Amount And Underlying Equity EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity	27867000	USD
CY2019	exr	Equity Method Investment Excess Purchase Price Amortization Period EquityMethodInvestmentExcessPurchasePriceAmortizationPeriod	P40Y
CY2019	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	14624000	USD
CY2018	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	14123000	USD
CY2017	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	12650000	USD
CY2019Q4	us-gaap	Line Of Credit LineOfCredit	158000000	USD
CY2019Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	790000000	USD
CY2019Q4	us-gaap	Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet	4374000	USD
CY2019Q4	us-gaap	Derivative Number Of Instruments Held DerivativeNumberOfInstrumentsHeld	24	derivative
CY2019Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	2354609000	USD
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.81
CY2019Q4	us-gaap	Due From Related Parties Noncurrent DueFromRelatedPartiesNoncurrent	100000000	USD
CY2018Q4	us-gaap	Due From Related Parties Noncurrent DueFromRelatedPartiesNoncurrent	108644000	USD
CY2019Q4	exr	Common Stock Average Closing Market Price CommonStockAverageClosingMarketPrice	104.18
CY2019Q4	us-gaap	Units Of Partnership Interest Amount UnitsOfPartnershipInterestAmount	5924778	shares
CY2019Q4	exr	Operating Partnership Units Redemption Amount OperatingPartnershipUnitsRedemptionAmount	617243000	USD
CY2019Q4	exr	Derivative With Contingent Features Fair Value Of Asset Liability Net DerivativeWithContingentFeaturesFairValueOfAssetLiabilityNet	-30269000	USD
CY2019Q4	exr	Derivative Instruments With Contingent Features Contingent Cash Settlement Value DerivativeInstrumentsWithContingentFeaturesContingentCashSettlementValue	32245000	USD
CY2005Q4	exr	Variable Interest Entity Interest In Trust Number VariableInterestEntityInterestInTrustNumber	3	subsidiary
CY2017Q4	exr	Noncontrolling Interest Operating Partnership Units Redeemed For Common Stock NoncontrollingInterestOperatingPartnershipUnitsRedeemedForCommonStock	0	shares
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	4742000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	4687000	USD
CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	5103000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	22710000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	22793000	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	24406000	USD
CY2019Q4	exr	Noncontrolling Interest Operating Partnership Units Redeemed For Cash NoncontrollingInterestOperatingPartnershipUnitsRedeemedForCash	0	shares
CY2018Q4	exr	Noncontrolling Interest Operating Partnership Units Redeemed For Cash NoncontrollingInterestOperatingPartnershipUnitsRedeemedForCash	30000	shares
CY2017Q4	exr	Noncontrolling Interest Operating Partnership Units Redeemed For Cash NoncontrollingInterestOperatingPartnershipUnitsRedeemedForCash	33896	shares
CY2019Q4	exr	Noncontrolling Interest Operating Partnership Units Redeemed Cash Paid NoncontrollingInterestOperatingPartnershipUnitsRedeemedCashPaid	0	USD
CY2018Q4	exr	Noncontrolling Interest Operating Partnership Units Redeemed Cash Paid NoncontrollingInterestOperatingPartnershipUnitsRedeemedCashPaid	2558000	USD
CY2019	exr	Lease Contract Term After Which Can Be Terminated LeaseContractTermAfterWhichCanBeTerminated	P10Y
CY2019	exr	Lease Contract Term After Which Can Be Terminated LeaseContractTermAfterWhichCanBeTerminated	P10Y
CY2019Q2	exr	Increase In Operating Lease Right Of Use Assets IncreaseInOperatingLeaseRightOfUseAssets	127532000	USD
CY2019Q3	exr	Increase In Operating Lease Right Of Use Assets IncreaseInOperatingLeaseRightOfUseAssets	52224000	USD
CY2019	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	17968000	USD
CY2018	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	18106000	USD
CY2017	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	19303000	USD
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	129534407	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019	exr	Common Stock Voting Rights Votes Number CommonStockVotingRightsVotesNumber	1	item
CY2019Q2	exr	Number Of Sales Agents NumberOfSalesAgents	9	sales_agent
CY2017Q4	exr	Noncontrolling Interest Operating Partnership Units Redeemed Cash Paid NoncontrollingInterestOperatingPartnershipUnitsRedeemedCashPaid	2510000	USD
CY2019Q4	exr	Noncontrolling Interest Operating Partnership Units Issued With Acquisition NoncontrollingInterestOperatingPartnershipUnitsIssuedWithAcquisition	0	shares
CY2018Q4	exr	Noncontrolling Interest Operating Partnership Units Issued With Acquisition NoncontrollingInterestOperatingPartnershipUnitsIssuedWithAcquisition	21768	shares
CY2017Q4	exr	Noncontrolling Interest Operating Partnership Units Issued With Acquisition NoncontrollingInterestOperatingPartnershipUnitsIssuedWithAcquisition	90228	shares
CY2019Q4	exr	Noncontrolling Interest Operating Partnership Units Issued With Acquisition Value NoncontrollingInterestOperatingPartnershipUnitsIssuedWithAcquisitionValue	0	USD
CY2018Q4	exr	Noncontrolling Interest Operating Partnership Units Issued With Acquisition Value NoncontrollingInterestOperatingPartnershipUnitsIssuedWithAcquisitionValue	1877000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	20268000	USD
CY2017Q4	exr	Noncontrolling Interest Operating Partnership Units Issued With Acquisition Value NoncontrollingInterestOperatingPartnershipUnitsIssuedWithAcquisitionValue	7618000	USD
CY2019	exr	Increase In Noncontrolling Interest Units Conversion Of Preferred Units IncreaseInNoncontrollingInterestUnitsConversionOfPreferredUnits	270709	shares
CY2018	exr	Increase In Noncontrolling Interest Units Conversion Of Preferred Units IncreaseInNoncontrollingInterestUnitsConversionOfPreferredUnits	373113	shares
CY2017	exr	Increase In Noncontrolling Interest Units Conversion Of Preferred Units IncreaseInNoncontrollingInterestUnitsConversionOfPreferredUnits	0	shares
CY2019Q2	exr	Number Of Stores Added Under Operating Lease NumberOfStoresAddedUnderOperatingLease	22	store
CY2019Q3	exr	Number Of Stores Added Under Operating Lease NumberOfStoresAddedUnderOperatingLease	5	store
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	5068000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	164000	USD
CY2019	us-gaap	Lease Cost LeaseCost	25958000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	231000	USD
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.83
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	290000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	168000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	19226000	USD
CY2019	exr	Cash Paid For Operating Activities Lessee CashPaidForOperatingActivitiesLessee	19457000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	277557000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	8050000	USD
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P46Y10M24D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P14Y8M12D
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0607
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0365
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	8229000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	6898000	USD
CY2019Q4	exr	Lessee Operating And Finance Lease Liability Payments Remainderof Fiscal Year LesseeOperatingAndFinanceLeaseLiabilityPaymentsRemainderofFiscalYear	28601000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	28628000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	237000	USD
CY2019Q4	exr	Lessee Operating And Finance Lease Liability Payments Due Year Two LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo	28865000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	28651000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	255000	USD
CY2019Q4	exr	Lessee Operating And Finance Lease Liability Payments Due Year Three LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearThree	28906000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	28369000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	232000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	28707000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	255000	USD
CY2019Q4	exr	Lessee Operating And Finance Lease Liability Payments Due Year Four LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFour	28962000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	29198000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	255000	USD
CY2019Q4	exr	Lessee Operating And Finance Lease Liability Payments Due Year Five LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFive	29453000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	223823000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	16522000	USD
CY2019Q4	exr	Lessee Operating And Finance Lease Liability Payments Due After Year Five LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueAfterYearFive	240345000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	367376000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	17756000	USD
CY2019Q4	exr	Lessee Operating And Finance Lease Liability Payments Due LesseeOperatingAndFinanceLeaseLiabilityPaymentsDue	385132000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	92593000	USD
CY2019Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	12918000	USD
CY2019Q4	exr	Lessee Operating And Finance Lease Liability Undiscounted Excess Amount LesseeOperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount	105511000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	274783000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4838000	USD
CY2019Q4	exr	Lessee Operating And Finance Lease Liability LesseeOperatingAndFinanceLeaseLiability	279621000	USD
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	38418	shares
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	8203000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	8307000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	8137000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	7837000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	7021000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	111653000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	151158000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	1438073	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	510574	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	30.60
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	32.94
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	472156	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	30.41
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	54575	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	21.45
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	417581	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	31.58
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	211057	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	14.65
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	206524	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	48.88
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y5M4D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	11719000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	206460	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	48.87
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P3Y5M4D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	11717000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	197576	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	47.20
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y3M18D
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	11543000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	18089000	USD
CY2019	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P3Y5M1D
CY2019Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	48.88
CY2019Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	197576	shares
CY2019Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	47.20
CY2019	exr	Maximum Percentage Of Matching Contribution Made By Company For Next Two Percent Of Participants Compensation MaximumPercentageOfMatchingContributionMadeByCompanyForNextTwoPercentOfParticipantsCompensation	0.50
CY2019	exr	Maximum Percentage Of Compensation By Plan Participants Subject To Fifty Percent Matching Of Company MaximumPercentageOfCompensationByPlanParticipantsSubjectToFiftyPercentMatchingOfCompany	0.02
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	3693000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	1786000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2019	exr	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Forfeiture Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageForfeitureRate	0.074
CY2019Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	206524	shares
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2212000	USD
CY2019	exr	Percentage Of Matching Contribution Made By Company For First Three Percent Of Participants Compensation PercentageOfMatchingContributionMadeByCompanyForFirstThreePercentOfParticipantsCompensation	1
CY2019	exr	Maximum Percentage Of Compensation By Plan Participants Subject To Hundred Percent Matching Of Company MaximumPercentageOfCompensationByPlanParticipantsSubjectToHundredPercentMatchingOfCompany	0.03
CY2019Q4	exr	Maximum Percentage Of Annual Salary Which Plan Participants May Contribute To The Plan MaximumPercentageOfAnnualSalaryWhichPlanParticipantsMayContributeToThePlan	0.60
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3355000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2833000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	10164000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2936000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	13100000	USD
CY2019	exr	Income Tax Credits And Adjustments Federal IncomeTaxCreditsAndAdjustmentsFederal	-3633000	USD
CY2019	exr	Income Tax Credits And Adjustments State IncomeTaxCreditsAndAdjustmentsState	-30000	USD
CY2019	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-3663000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1787000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	84000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1871000	USD
CY2019	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	8318000	USD
CY2019	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	2990000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11308000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	9136000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2426000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	11562000	USD
CY2018	exr	Income Tax Credits And Adjustments Federal IncomeTaxCreditsAndAdjustmentsFederal	-5841000	USD
CY2018	exr	Income Tax Credits And Adjustments State IncomeTaxCreditsAndAdjustmentsState	-175000	USD
CY2018	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-6016000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	3730000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	97110000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	95828000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-32000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3698000	USD
CY2018	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	7025000	USD
CY2018	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	2219000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9244000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	5677000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1662000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	7339000	USD
CY2017	exr	Income Tax Credits And Adjustments Federal IncomeTaxCreditsAndAdjustmentsFederal	-5573000	USD
CY2017	exr	Income Tax Credits And Adjustments State IncomeTaxCreditsAndAdjustmentsState	-383000	USD
CY2017	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-5956000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1700000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	542000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2242000	USD
CY2017	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	1804000	USD
CY2017	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	1821000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3625000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	186274000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2019	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	82717000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.179
CY2018	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	83022000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.182
CY2017	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	170811000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.321
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2837000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.006
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2385000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.005
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2306000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.004
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-207000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-1052000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.002
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	159000	USD
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CY2019	exr	Income Tax Reconciliation Tax Credits Adjustments IncomeTaxReconciliationTaxCreditsAdjustments	3663000	USD
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CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1121000	USD
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CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	113000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11308000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.025
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9244000	USD
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.020
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3625000	USD
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.006
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	23805000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	20907000	USD
CY2019Q4	exr	Deferred Tax Liabilities Right Of Use Asset DeferredTaxLiabilitiesRightOfUseAsset	2475000	USD
CY2018Q4	exr	Deferred Tax Liabilities Right Of Use Asset DeferredTaxLiabilitiesRightOfUseAsset	0	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	84000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	96000	USD
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CY2018Q4	exr	Deferred Tax Liabilities State Taxes DeferredTaxLiabilitiesStateTaxes	3076000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	24079000	USD
CY2019Q4	exr	Deferred Tax Assets Tax Deferred Captive Insurance Subsidiary DeferredTaxAssetsTaxDeferredCaptiveInsuranceSubsidiary	312000	USD
CY2018Q4	exr	Deferred Tax Assets Tax Deferred Captive Insurance Subsidiary DeferredTaxAssetsTaxDeferredCaptiveInsuranceSubsidiary	324000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	2006000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1772000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	2118000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1604000	USD
CY2019Q4	exr	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	2478000	USD
CY2018Q4	exr	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Investment In Subsidiaries DeferredTaxAssetsInvestmentInSubsidiaries	219000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Investment In Subsidiaries DeferredTaxAssetsInvestmentInSubsidiaries	219000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	50000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	53000	USD
CY2019Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	7250000	USD
CY2018Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	7196000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	14433000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	11168000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	3665000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	3872000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	19001000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	16783000	USD
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	49890000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	41757000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	39379000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	89418000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	81256000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	78961000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	219857000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	209050000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	193296000	USD
CY2019	exr	Gains Losses On Real Estate Transactions Net Of Impairment Of Real Estate GainsLossesOnRealEstateTransactionsNetOfImpairmentOfRealEstate	1205000	USD
CY2018	exr	Gains Losses On Real Estate Transactions Net Of Impairment Of Real Estate GainsLossesOnRealEstateTransactionsNetOfImpairmentOfRealEstate	30807000	USD
CY2017	exr	Gains Losses On Real Estate Transactions Net Of Impairment Of Real Estate GainsLossesOnRealEstateTransactionsNetOfImpairmentOfRealEstate	112789000	USD
CY2019	exr	Interest Expense Excluding Amortizationof Debt Discount Premium InterestExpenseExcludingAmortizationofDebtDiscountPremium	186526000	USD
CY2018	exr	Interest Expense Excluding Amortizationof Debt Discount Premium InterestExpenseExcludingAmortizationofDebtDiscountPremium	178436000	USD
CY2017	exr	Interest Expense Excluding Amortizationof Debt Discount Premium InterestExpenseExcludingAmortizationofDebtDiscountPremium	153511000	USD
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CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	5103000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	7467000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	5292000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	6736000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	11274000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	14452000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3625000	USD
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CY2019	us-gaap	Profit Loss ProfitLoss	451123000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	447080000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.74
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.82
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	15331000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11308000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9244000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	514222000	USD
CY2019Q1	us-gaap	Revenues Revenues	311546000	USD
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CY2019Q3	us-gaap	Revenues Revenues	337505000	USD
CY2019Q4	us-gaap	Revenues Revenues	335801000	USD
CY2019Q1	us-gaap	Costs And Expenses CostsAndExpenses	163069000	USD
CY2019Q2	us-gaap	Costs And Expenses CostsAndExpenses	165609000	USD
CY2019Q3	us-gaap	Costs And Expenses CostsAndExpenses	174867000	USD
CY2019Q4	us-gaap	Costs And Expenses CostsAndExpenses	171156000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	148477000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	157993000	USD
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CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	164645000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	102160000	USD
CY2019Q2	us-gaap	Profit Loss ProfitLoss	112689000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	115995000	USD
CY2019Q4	us-gaap	Profit Loss ProfitLoss	120279000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	94770000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	104828000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	108087000	USD
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.87
CY2018Q2	us-gaap	Revenues Revenues	296813000	USD
CY2018Q3	us-gaap	Revenues Revenues	306953000	USD
CY2018Q4	us-gaap	Revenues Revenues	307353000	USD
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.86
CY2018Q1	us-gaap	Revenues Revenues	285485000	USD
CY2018Q1	us-gaap	Costs And Expenses CostsAndExpenses	151573000	USD
CY2018Q2	us-gaap	Costs And Expenses CostsAndExpenses	152097000	USD
CY2018Q3	us-gaap	Costs And Expenses CostsAndExpenses	153362000	USD
CY2018Q4	us-gaap	Costs And Expenses CostsAndExpenses	150676000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	133912000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	144716000	USD
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CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	156677000	USD
CY2018Q1	us-gaap	Profit Loss ProfitLoss	95430000	USD
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CY2018Q3	us-gaap	Profit Loss ProfitLoss	139687000	USD
CY2018Q4	us-gaap	Profit Loss ProfitLoss	109250000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	88256000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	95153000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	130418000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	101462000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.75
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.03
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.80
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.70
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.02
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
CY2019	exr	Sec Schedule1228 Real Estate Companies Investmentin Real Estateand Accumulated Depreciation Numberof Stores SECSchedule1228RealEstateCompaniesInvestmentinRealEstateandAccumulatedDepreciationNumberofStores	930	store
CY2019Q4	srt	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	2249685000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	1938111000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	6462425000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Carrying Costs RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts	770180000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	1938923000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	7231793000	USD
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	9170716000	USD
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1473852000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	8050000	USD
CY2019Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	7696864000	USD
CY2018Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	7491831000	USD
CY2017Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	7132431000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	8050000	USD
CY2019Q4	srt	Real Estate Federal Income Tax Basis RealEstateFederalIncomeTaxBasis	7721422000	USD

Files In Submission

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$EXR
Extra Space Storage Inc. Stock $exr

2019 Q4 Form 10-K Financial Statement

#000162828020002202 Filed on February 25, 2020

Income Statement

Balance Sheet

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Facts In Submission

Files In Submission

$EXR Extra Space Storage Inc. Stock $exr

2019 Q4 Form 10-K Financial Statement

#000162828020002202 Filed on February 25, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EXR
Extra Space Storage Inc. Stock $exr