$EXR
Extra Space Storage Inc. Stock $exr

$exr Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000162828021003458 Filed on February 26, 2021

Income Statement

Concept	2019 Q4	2018
Revenue	$335.8M	$1.197B
YoY Change	9.26%	8.29%
Cost Of Revenue	$95.50M	$291.7M
YoY Change	20.73%	7.25%
Gross Profit	$240.3M	$904.9M
YoY Change	5.3%	8.63%
Gross Profit Margin	71.56%	75.62%
Selling, General & Admin	$20.90M	$97.40M
YoY Change	13.59%	4.28%
% of Gross Profit	8.7%	10.76%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$54.80M	$209.1M
YoY Change	3.01%	8.15%
% of Gross Profit	22.8%	23.1%
Operating Expenses	$75.70M	$306.5M
YoY Change	5.73%	6.91%
Operating Profit	$164.6M	$619.7M
YoY Change	5.09%	-5.3%
Interest Expense	-$41.60M	$178.4M
YoY Change	-6.09%	16.24%
% of Operating Profit	-25.27%	28.79%
Other Income/Expense, Net
YoY Change
Pretax Income	$123.0M	$441.9M
YoY Change	9.43%	-12.07%
Income Tax	$2.700M	$9.244M
% Of Pretax Income	2.2%	2.09%
Net Earnings	$112.3M	$415.3M
YoY Change	10.66%	-13.3%
Net Earnings / Revenue	33.44%	34.71%
Basic Earnings Per Share	$0.87	$3.29
Diluted Earnings Per Share	$0.86	$3.27
COMMON SHARES
Basic Shares Outstanding	129.5M shares	126.1M shares
Diluted Shares Outstanding		133.2M shares

Balance Sheet

Concept	2019 Q4	2018
SHORT-TERM ASSETS
Cash & Short-Term Investments	$65.70M	$57.50M
YoY Change	14.26%	3.23%
Cash & Equivalents	$65.75M	$57.50M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$65.70M	$57.50M
YoY Change	14.26%	3.23%
LONG-TERM ASSETS
Property, Plant & Equipment	$7.962B	$7.492B
YoY Change	6.27%	5.04%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$338.1M	$125.3M
YoY Change	169.83%	65.09%
Other Assets	$5.000M	$15.20M
YoY Change	-67.11%	-50.0%
Total Long-Term Assets	$8.467B	$7.791B
YoY Change	8.68%	5.2%
TOTAL ASSETS
Total Short-Term Assets	$65.70M	$57.50M
Total Long-Term Assets	$8.467B	$7.791B
Total Assets	$8.532B	$7.848B
YoY Change	8.72%	5.19%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$111.4M	$101.5M
YoY Change	9.75%	5.62%
Accrued Expenses	$274.8M
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$386.2M	$101.5M
YoY Change	280.49%	5.62%
LONG-TERM LIABILITIES
Long-Term Debt	$5.047B	$4.812B
YoY Change	4.88%	5.65%
Other Long-Term Liabilities	$178.0M	$149.6M
YoY Change	18.98%	72.35%
Total Long-Term Liabilities	$5.225B	$4.961B
YoY Change	5.31%	6.9%
TOTAL LIABILITIES
Total Short-Term Liabilities	$386.2M	$101.5M
Total Long-Term Liabilities	$5.225B	$4.961B
Total Liabilities	$5.611B	$5.434B
YoY Change	10.83%	6.34%
SHAREHOLDERS EQUITY
Retained Earnings	-$301.0M
YoY Change	14.51%
Common Stock	$2.870B
YoY Change	8.63%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.540B	$2.414B
YoY Change
Total Liabilities & Shareholders Equity	$8.532B	$7.848B
YoY Change	8.72%	5.19%

Cashflow Statement

Concept	2019 Q4	2018
OPERATING ACTIVITIES
Net Income	$112.3M	$415.3M
YoY Change	10.66%	-13.3%
Depreciation, Depletion And Amortization	$54.80M	$209.1M
YoY Change	3.01%	8.15%
Cash From Operating Activities	$163.2M	$677.8M
YoY Change	9.68%	13.46%
INVESTING ACTIVITIES
Capital Expenditures	-$84.50M	-$491.4M
YoY Change	-27.16%	-29.07%
Acquisitions
YoY Change
Other Investing Activities	-$180.8M	$47.50M
YoY Change	1558.72%	-86.02%
Cash From Investing Activities	-$265.2M	-$443.9M
YoY Change	108.98%	25.72%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		-$90.23M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	106.1M	-$247.3M
YoY Change	-771.52%	14.47%
NET CHANGE
Cash From Operating Activities	163.2M	$677.8M
Cash From Investing Activities	-265.2M	-$443.9M
Cash From Financing Activities	106.1M	-$247.3M
Net Change In Cash	4.100M	-$13.35M
YoY Change	-32.79%	-147.18%
FREE CASH FLOW
Cash From Operating Activities	$163.2M	$677.8M
Capital Expenditures	-$84.50M	-$491.4M
Free Cash Flow	$247.7M	$1.169B
YoY Change	-6.46%	-9.38%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-32269
CY2020	dei	Entity Registrant Name EntityRegistrantName	EXTRA SPACE STORAGE INC.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	20-1076777
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	2795 East Cottonwood Parkway, Suite 300
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Salt Lake City
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	UT
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	84121
CY2020	dei	City Area Code CityAreaCode	801
CY2020	dei	Local Phone Number LocalPhoneNumber	365-4600
CY2020	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value
CY2020	dei	Trading Symbol TradingSymbol	EXR
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
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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
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	32244000	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
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	411652000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	356351000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	416649000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2723807000	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	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	0	USD
CY2018	exr	Noncontrolling Interest Conversion Of Preferred Unitsto Common Units NoncontrollingInterestConversionOfPreferredUnitstoCommonUnits	0	USD
CY2018	exr	Noncontrolling Interest Increase From Transactions With Other Noncontrolling Interests Net NoncontrollingInterestIncreaseFromTransactionsWithOtherNoncontrollingInterestsNet	122000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	-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	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	3.36
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	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	0	USD
CY2019	us-gaap	Partners Capital Account Acquisitions PartnersCapitalAccountAcquisitions	28022000	USD
CY2019	exr	Noncontrolling Interest Conversion Of Preferred Unitsto Common Units NoncontrollingInterestConversionOfPreferredUnitstoCommonUnits	0	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	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	3.56
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	458114000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2921694000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2921694000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	4759000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	16281000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	103468000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	67873000	USD
CY2020	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	0	USD
CY2020	exr	Stock Issued During Period Repurchase Of Equity Portion Of Exchangeable Senior Notes Value StockIssuedDuringPeriodRepurchaseOfEquityPortionOfExchangeableSeniorNotesValue	0	USD
CY2020	exr	Noncontrolling Interest Repayment Of Receivable For Preferred Operating Units Pledged As Collateral On Loan NoncontrollingInterestRepaymentOfReceivableForPreferredOperatingUnitsPledgedAsCollateralOnLoan	16213000	USD
CY2020	exr	Noncontrolling Interest Increase From Transactions With Other Noncontrolling Interests Net NoncontrollingInterestIncreaseFromTransactionsWithOtherNoncontrollingInterestsNet	66000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	517582000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-73686000	USD
CY2020	us-gaap	Partners Capital Account Distributions PartnersCapitalAccountDistributions	33615000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.90
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	467765000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2936124000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	517582000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	451123000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	447080000	USD
CY2020	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	224444000	USD
CY2019	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	219857000	USD
CY2018	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	209050000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	9386000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	11989000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	14286000	USD
CY2020	exr	Amortization Of Debt Discount Premium Equity Component Of Senior Notes AmortizationOfDebtDiscountPremiumEquityComponentOfSeniorNotes	3675000	USD
CY2019	exr	Amortization Of Debt Discount Premium Equity Component Of Senior Notes AmortizationOfDebtDiscountPremiumEquityComponentOfSeniorNotes	4742000	USD
CY2018	exr	Amortization Of Debt Discount Premium Equity Component Of Senior Notes AmortizationOfDebtDiscountPremiumEquityComponentOfSeniorNotes	4687000	USD
CY2020	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	1173000	USD
CY2019	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	1064000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	16281000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	13051000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	11176000	USD
CY2020	exr	Noncash Interest Income NoncashInterestIncome	8059000	USD
CY2019	exr	Noncash Interest Income NoncashInterestIncome	0	USD
CY2018	exr	Noncash Interest Income NoncashInterestIncome	0	USD
CY2020	exr	Gains Losses On Real Estate Transactions Net Of Impairment Of Real Estate GainsLossesOnRealEstateTransactionsNetOfImpairmentOfRealEstate	18075000	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
CY2020	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-6893000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-6358000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-6867000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	19674000	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
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	17974000	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
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	19632000	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
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	771232000	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
CY2020	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	320148000	USD
CY2019	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	349494000	USD
CY2018	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	426388000	USD
CY2020	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	67300000	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
CY2020	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	44024000	USD
CY2019	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	11254000	USD
CY2018	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	52458000	USD
CY2020	exr	Payments For Investment In Unconsolidated Real Estate Entities PaymentsForInvestmentInUnconsolidatedRealEstateEntities	64792000	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
CY2020	exr	Return Of Investment Real Estate Ventures ReturnOfInvestmentRealEstateVentures	371000	USD
CY2019	exr	Return Of Investment Real Estate Ventures ReturnOfInvestmentRealEstateVentures	3982000	USD
CY2018	exr	Return Of Investment Real Estate Ventures ReturnOfInvestmentRealEstateVentures	49130000	USD
CY2020	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	313355000	USD
CY2019	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	185993000	USD
CY2018	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	13850000	USD
CY2020	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	300000000	USD
CY2019	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2018	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2020	us-gaap	Proceeds From Sale Of Notes Receivable ProceedsFromSaleOfNotesReceivable	62764000	USD
CY2019	us-gaap	Proceeds From Sale Of Notes Receivable ProceedsFromSaleOfNotesReceivable	0	USD
CY2018	us-gaap	Proceeds From Sale Of Notes Receivable ProceedsFromSaleOfNotesReceivable	0	USD
CY2020	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	10102000	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
CY2020	us-gaap	Payments To Acquire Furniture And Fixtures PaymentsToAcquireFurnitureAndFixtures	7093000	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
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-955427000	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
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	103468000	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
CY2020	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	3281000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	2214000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	1413030000	USD
CY2020	us-gaap	Repayments Of Debt RepaymentsOfDebt	2014730000	USD
CY2019	us-gaap	Repayments Of Debt RepaymentsOfDebt	1977805000	USD
CY2018	us-gaap	Repayments Of Debt RepaymentsOfDebt	1109854000	USD
CY2020	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	0	USD
CY2019	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	30928000	USD
CY2018	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	88662000	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	4052000	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	2986000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	12302000	USD
CY2020	exr	Repayments Of Debt Instruments RepaymentsOfDebtInstruments	575000000	USD
CY2019	exr	Repayments Of Debt Instruments RepaymentsOfDebtInstruments	0	USD
CY2018	exr	Repayments Of Debt Instruments RepaymentsOfDebtInstruments	80270000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	4759000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	3063000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1169000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	67873000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020	exr	Proceeds From Collection Of Notes Receivable Financing Activities ProceedsFromCollectionOfNotesReceivableFinancingActivities	16213000	USD
CY2019	exr	Proceeds From Collection Of Notes Receivable Financing Activities ProceedsFromCollectionOfNotesReceivableFinancingActivities	0	USD
CY2018	exr	Proceeds From Collection Of Notes Receivable Financing Activities ProceedsFromCollectionOfNotesReceivableFinancingActivities	0	USD
CY2020	exr	Cash Portion Of Redemption Of Preferred Operating Partnership Units CashPortionOfRedemptionOfPreferredOperatingPartnershipUnits	1000000	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
CY2020	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	66000	USD
CY2019	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	173000	USD
CY2018	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	122000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	467765000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	458114000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	424907000	USD
CY2020	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	33615000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	34243000	USD
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	33250000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	241471000	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
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	57276000	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
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
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	128009000	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
CY2020	us-gaap	Interest Paid Net InterestPaidNet	159597000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	174155000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	159474000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	5181000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	10359000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	730000	USD
CY2020	exr	Noncontrolling Interest Decrease From Redemptions Of Operating Partnership Units NoncontrollingInterestDecreaseFromRedemptionsOfOperatingPartnershipUnits	4005000	USD
CY2019	exr	Noncontrolling Interest Decrease From Redemptions Of Operating Partnership Units NoncontrollingInterestDecreaseFromRedemptionsOfOperatingPartnershipUnits	13057000	USD
CY2018	exr	Noncontrolling Interest Decrease From Redemptions Of Operating Partnership Units NoncontrollingInterestDecreaseFromRedemptionsOfOperatingPartnershipUnits	1337000	USD
CY2020	exr	Redemption Of Operating Partnership Units Held By Noncontrolling Interest Including Additional Paid In Capital RedemptionOfOperatingPartnershipUnitsHeldByNoncontrollingInterestIncludingAdditionalPaidInCapital	4005000	USD
CY2019	exr	Redemption Of Operating Partnership Units Held By Noncontrolling Interest Including Additional Paid In Capital RedemptionOfOperatingPartnershipUnitsHeldByNoncontrollingInterestIncludingAdditionalPaidInCapital	13057000	USD
CY2018	exr	Redemption Of Operating Partnership Units Held By Noncontrolling Interest Including Additional Paid In Capital RedemptionOfOperatingPartnershipUnitsHeldByNoncontrollingInterestIncludingAdditionalPaidInCapital	1337000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	8014000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	277557000	USD
CY2020	exr	Establishment Of Operating Lease Liability EstablishmentOfOperatingLeaseLiability	8014000	USD
CY2019	exr	Establishment Of Operating Lease Liability EstablishmentOfOperatingLeaseLiability	286914000	USD
CY2020	exr	Establishment Of Operating Lease Right Of Use Assets And Lease Liabilities Increase Decrease In Accounts Payable And Accrued Expenses EstablishmentOfOperatingLeaseRightOfUseAssetsAndLeaseLiabilitiesIncreaseDecreaseInAccountsPayableAndAccruedExpenses	0	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
CY2020	exr	Noncash Or Part Noncash Acquisition Net Real Estate Assets Acquired NoncashOrPartNoncashAcquisitionNetRealEstateAssetsAcquired	-41491000	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
CY2020	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	0	USD
CY2019	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	0	USD
CY2018	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	1877000	USD
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	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
CY2020	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	0	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
CY2020	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	41491000	USD
CY2019	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0	USD
CY2018	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0	USD
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	0	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	1129000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	0	USD
CY2020	exr	Real Estate Additions Portion Not Yet Paid RealEstateAdditionsPortionNotYetPaid	656000	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
CY2020	exr	Construction In Progress Additions Portion Not Yet Paid ConstructionInProgressAdditionsPortionNotYetPaid	0	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
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	656000	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
CY2020	exr	Non Cash Decrease In Investments In Unconsolidated Entities NonCashDecreaseInInvestmentsInUnconsolidatedEntities	0	USD
CY2019	exr	Non Cash Decrease In Investments In Unconsolidated Entities NonCashDecreaseInInvestmentsInUnconsolidatedEntities	28022000	USD
CY2018	exr	Non Cash Decrease In Investments In Unconsolidated Entities NonCashDecreaseInInvestmentsInUnconsolidatedEntities	0	USD
CY2020	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	28022000	USD
CY2018	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2020	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	2724000	USD
CY2019	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	0	USD
CY2018	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	0	USD
CY2020	exr	Redemption Of Operating Partnership Units For Common Stock Including Additional Paid In Capital RedemptionOfOperatingPartnershipUnitsForCommonStockIncludingAdditionalPaidInCapital	2724000	USD
CY2019	exr	Redemption Of Operating Partnership Units For Common Stock Including Additional Paid In Capital RedemptionOfOperatingPartnershipUnitsForCommonStockIncludingAdditionalPaidInCapital	0	USD
CY2018	exr	Redemption Of Operating Partnership Units For Common Stock Including Additional Paid In Capital RedemptionOfOperatingPartnershipUnitsForCommonStockIncludingAdditionalPaidInCapital	0	USD
CY2020	exr	Conversion Of Preferred Operating Units To Common Units ConversionOfPreferredOperatingUnitsToCommonUnits	0	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
CY2020	exr	Conversion Of Preferred Operating Units To Common Units ConversionOfPreferredOperatingUnitsToCommonUnits	0	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
CY2020	us-gaap	Nature Of Operations NatureOfOperations	DESCRIPTION OF BUSINESS<div style="margin-top:6pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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="margin-top:12pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company invests in stores by acquiring wholly-owned stores or by acquiring an equity interest in real estate entities. At December 31, 2020, the Company had direct and indirect equity interests in 1,197 storage facilities. In addition, the Company managed 724 stores for third parties bringing the total number of stores which it owns and/or manages to 1,921. These stores are located in 40 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>
CY2020Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	1197	store
CY2020Q4	exr	Number Of Real Estate Properties Franchisees And Others NumberOfRealEstatePropertiesFranchiseesAndOthers	724	store
CY2020Q4	exr	Number Of Real Estate Properties Owned And Or Managed NumberOfRealEstatePropertiesOwnedAndOrManaged	1921	store
CY2020Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	40	state
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-top:6pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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>
CY2020	exr	Number Of Leased Properties That Cannot Be Classified As Ground Or Building Leases NumberOfLeasedPropertiesThatCannotBeClassifiedAsGroundOrBuildingLeases	3	store
CY2020	exr	Number Of Properties Related To Ground Leases Assumed By The Entity At Rates Lower Than Current Market Rates NumberOfPropertiesRelatedToGroundLeasesAssumedByTheEntityAtRatesLowerThanCurrentMarketRates	8	store
CY2020	exr	Economic Risk Number Of Components EconomicRiskNumberOfComponents	3	item
CY2020Q4	exr	Tenant Reinsurance Policy Minimum Amount Of Insurance Coverage TenantReinsurancePolicyMinimumAmountOfInsuranceCoverage	2000	USD
CY2020Q4	exr	Tenant Reinsurance Policy Maximum Amount Of Insurance Coverage TenantReinsurancePolicyMaximumAmountOfInsuranceCoverage	10000	USD
CY2020Q4	exr	Tenant Reinsurance Policy Average Amount Of Insurance Coverage TenantReinsurancePolicyAverageAmountOfInsuranceCoverage	3100	USD
CY2020	exr	Number Of Claims Made Under Tenant Reinsurance Program NumberOfClaimsMadeUnderTenantReinsuranceProgram	8890	claim
CY2019	exr	Number Of Claims Made Under Tenant Reinsurance Program NumberOfClaimsMadeUnderTenantReinsuranceProgram	7911	claim
CY2018	exr	Number Of Claims Made Under Tenant Reinsurance Program NumberOfClaimsMadeUnderTenantReinsuranceProgram	8088	claim
CY2020	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:<table style="border-collapse:collapse;display:inline-table;vertical-align:top;width:99.853%"><tr><td style="width:1.0%"/><td style="width:59.222%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.637%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.532%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.637%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.532%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.640%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></td><td colspan="15" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">For the Year Ended December 31,</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">Tenant Reinsurance Claims:</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">2020</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">2019</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">2018</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Unpaid claims liability at beginning of year</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,109 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">7,326 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5,167 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 10pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Claims and claim adjustment expense for claims incurred in the current year</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">14,534 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">16,280 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">15,800 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 10pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Claims and claim adjustment expense (benefit) for claims incurred in the prior years</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(1,351)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">98 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">107 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Payments for current year claims</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(9,697)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(11,352)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(11,010)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Payments for prior year claims</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(3,301)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(4,243)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(2,738)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Unpaid claims liability at the end of the year</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,294 </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,109 </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">7,326 </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table>
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
CY2020	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	14534000	USD
CY2019	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	16280000	USD
CY2018	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	15800000	USD
CY2020	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-1351000	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
CY2020	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	9697000	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
CY2020	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	3301000	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
CY2020Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	8294000	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
CY2020	us-gaap	Advertising Expense AdvertisingExpense	28336000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	25106000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	16153000	USD
CY2020	exr	Percentage Of All Distributions To Stockholders Which Classifies As Return Of Capital PercentageOfAllDistributionsToStockholdersWhichClassifiesAsReturnOfCapital	0
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
CY2020	exr	Average Share Price Per Share AverageSharePricePerShare	103.62
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	8273612	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1474558	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1795632	shares
CY2020	us-gaap	Net Income Loss NetIncomeLoss	481779000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	419967000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	415289000	USD
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	706000	USD
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
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	481073000	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
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	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
CY2020	exr	Net Income Loss Attributable To Noncontrolling Interest In Operating Partnership NetIncomeLossAttributableToNoncontrollingInterestInOperatingPartnership	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
CY2020	exr	Income Loss Attributable To Noncontrolling Interest Fixed Component IncomeLossAttributableToNoncontrollingInterestFixedComponent	0	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
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	481073000	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
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	129541531	shares
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
CY2020	exr	Incremental Common Shares Attributable To Conversion Of Operating Partnership Units IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits	0	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
CY2020	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	0	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
CY2020	exr	Incremental Common Shares Attributable To Share Based Payment Arrangements Stock Options IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsStockOptions	43298	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
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	129584829	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
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.71
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.27
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.29
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.71
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.24
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.27
CY2020Q4	us-gaap	Land Land	1952097000	USD
CY2019Q4	us-gaap	Land Land	1935551000	USD
CY2020Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	3372000	USD
CY2019Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	3372000	USD
CY2020Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	7357033000	USD
CY2019Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	7047654000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	58148000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	8050000	USD
CY2020Q4	exr	Real Estate Investment Property Intangible Tenant Relationships RealEstateInvestmentPropertyIntangibleTenantRelationships	124695000	USD
CY2019Q4	exr	Real Estate Investment Property Intangible Tenant Relationships RealEstateInvestmentPropertyIntangibleTenantRelationships	122489000	USD
CY2020Q4	exr	Real Estate Investment Property Intangible Lease Rights RealEstateInvestmentPropertyIntangibleLeaseRights	12443000	USD
CY2019Q4	exr	Real Estate Investment Property Intangible Lease Rights RealEstateInvestmentPropertyIntangibleLeaseRights	12443000	USD
CY2020Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	9507788000	USD
CY2019Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	9129559000	USD
CY2020Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1681429000	USD
CY2019Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1473852000	USD
CY2020Q4	exr	Net Operating Real Estate Assets NetOperatingRealEstateAssets	7826359000	USD
CY2019Q4	exr	Net Operating Real Estate Assets NetOperatingRealEstateAssets	7655707000	USD
CY2020Q4	us-gaap	Development In Process DevelopmentInProcess	67443000	USD
CY2019Q4	us-gaap	Development In Process DevelopmentInProcess	41157000	USD
CY2020Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	7893802000	USD
CY2019Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	7696864000	USD
CY2020Q4	us-gaap	Real Estate Heldforsale RealEstateHeldforsale	103624000	USD
CY2019Q4	us-gaap	Real Estate Heldforsale RealEstateHeldforsale	2947000	USD
CY2020Q4	exr	Number Of Operating Stores Held For Sale NumberOfOperatingStoresHeldForSale	16	store
CY2020	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P18M
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2258000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6614000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9050000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	129385000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	127712000	USD
CY2020	exr	Number Of Real Estate Properties Acquired NumberOfRealEstatePropertiesAcquired	23	store
CY2020	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	296725000	USD
CY2020	exr	Payments To Acquire Assets Gross PaymentsToAcquireAssetsGross	254111000	USD
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
CY2020	exr	Noncash Or Part Noncash Acquisition Finance Lease Liability NoncashOrPartNoncashAcquisitionFinanceLeaseLiability	41491000	USD
CY2020	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	0	USD
CY2020	exr	Real Estate Property Acquisition Increase Assets Acquired And Liabilities Assumed Net RealEstatePropertyAcquisitionIncreaseAssetsAcquiredAndLiabilitiesAssumedNet	-1123000	USD
CY2020	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	296725000	USD
CY2019	exr	Number Of Real Estate Properties Acquired NumberOfRealEstatePropertiesAcquired	21	store
CY2019	exr	Investments In Real Estate Joint Ventures Net Of Distributions Received InvestmentsInRealEstateJointVenturesNetOfDistributionsReceived	2780000	USD
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	Noncash Or Part Noncash Acquisition Finance Lease Liability NoncashOrPartNoncashAcquisitionFinanceLeaseLiability	0	USD
CY2019	exr	Real Estate Property Acquisition Increase Assets Acquired And Liabilities Assumed Net RealEstatePropertyAcquisitionIncreaseAssetsAcquiredAndLiabilitiesAssumedNet	-1129000	USD
CY2019	exr	Real Estate Property Asset Acquisition Consideration Transferred RealEstatePropertyAssetAcquisitionConsiderationTransferred	300379000	USD
CY2020	exr	Number Of Real Estate Properties Acquired Subject To Finance Lease NumberOfRealEstatePropertiesAcquiredSubjectToFinanceLease	3	store
CY2019	exr	Number Of Real Estate Properties Acquired Previous Noncontrolling Interest Held NumberOfRealEstatePropertiesAcquiredPreviousNoncontrollingInterestHeld	12	store
CY2020Q4	exr	Equity Method Investment Number Of Properties EquityMethodInvestmentNumberOfProperties	247	property
CY2020Q4	exr	Investment In Unconsolidated Real Estate Entities Net Of Distributions InvestmentInUnconsolidatedRealEstateEntitiesNetOfDistributions	350318000	USD
CY2019Q4	exr	Investment In Unconsolidated Real Estate Entities Net Of Distributions InvestmentInUnconsolidatedRealEstateEntitiesNetOfDistributions	292790000	USD
CY2019Q4	exr	Number Of Operating Stores Owned NumberOfOperatingStoresOwned	16	store
CY2020	exr	Contributions To Equity Method Investments Including Noncash Amounts ContributionsToEquityMethodInvestmentsIncludingNoncashAmounts	14792000	USD
CY2020	exr	Number Of Real Estate Properties Acquired By Joint Ventures NumberOfRealEstatePropertiesAcquiredByJointVentures	1	store
CY2020	exr	Number Of Stores Acquired At Issuance Of Certificate Of Occupancy NumberOfStoresAcquiredAtIssuanceOfCertificateOfOccupancy	5	store
CY2019Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	19663000	USD
CY2018Q4	exr	Number Of Operating Stores Owned NumberOfOperatingStoresOwned	28	store
CY2018Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	63723000	USD
CY2020	exr	Income Loss And Dividend Income From Unconsolidated Real Estate Entities IncomeLossAndDividendIncomeFromUnconsolidatedRealEstateEntities	22361000	USD
CY2019	exr	Income Loss And Dividend Income From Unconsolidated Real Estate Entities IncomeLossAndDividendIncomeFromUnconsolidatedRealEstateEntities	11274000	USD
CY2018	exr	Income Loss And Dividend Income From Unconsolidated Real Estate Entities IncomeLossAndDividendIncomeFromUnconsolidatedRealEstateEntities	14452000	USD
CY2020Q4	us-gaap	Equity Method Investment Difference Between Carrying Amount And Underlying Equity EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity	25251000	USD
CY2020	exr	Equity Method Investment Excess Purchase Price Amortization Period EquityMethodInvestmentExcessPurchasePriceAmortizationPeriod	P40Y
CY2020	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	15657000	USD
CY2019	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	14624000	USD
CY2018	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	12650000	USD
CY2019	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	17968000	USD
CY2020Q4	us-gaap	Dividends Receivable DividendsReceivable	4889000	USD
CY2019Q4	us-gaap	Dividends Receivable DividendsReceivable	0	USD
CY2020Q4	exr	Debt Securities Held To Maturity And Financing Receivable After Allowance For Credit Loss And Interest Receivable DebtSecuritiesHeldToMaturityAndFinancingReceivableAfterAllowanceForCreditLossAndInterestReceivable	593810000	USD
CY2019Q4	exr	Debt Securities Held To Maturity And Financing Receivable After Allowance For Credit Loss And Interest Receivable DebtSecuritiesHeldToMaturityAndFinancingReceivableAfterAllowanceForCreditLossAndInterestReceivable	43586000	USD
CY2020Q4	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	300000000	USD
CY2020	exr	Debt Securities Held To Maturity Term DebtSecuritiesHeldToMaturityTerm	P5Y
CY2020Q4	exr	Debt Securities Held To Maturity Extension Option DebtSecuritiesHeldToMaturityExtensionOption	2	extension_option
CY2020	exr	Debt Securities Held To Maturity Extension Term DebtSecuritiesHeldToMaturityExtensionTerm	P1Y
CY2020	exr	Debt Securities Held To Maturity Period After Which Preferred Dividends Increase Annually DebtSecuritiesHeldToMaturityPeriodAfterWhichPreferredDividendsIncreaseAnnually	P5Y
CY2020Q4	exr	Financing Receivable Extension Option FinancingReceivableExtensionOption	2	extension_option
CY2020	exr	Financing Receivable Extension Term FinancingReceivableExtensionTerm	P1Y
CY2020Q4	us-gaap	Line Of Credit LineOfCredit	949000000	USD
CY2020Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	1190000000	USD
CY2020Q4	us-gaap	Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet	35080000	USD
CY2020Q4	us-gaap	Derivative Number Of Instruments Held DerivativeNumberOfInstrumentsHeld	22	derivative
CY2020Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	2091270000	USD
CY2020Q4	exr	Derivative With Contingent Features Fair Value Of Asset Liability Net DerivativeWithContingentFeaturesFairValueOfAssetLiabilityNet	-101662000	USD
CY2020Q4	exr	Derivative Instruments With Contingent Features Contingent Cash Settlement Value DerivativeInstrumentsWithContingentFeaturesContingentCashSettlementValue	101662000	USD
CY2005Q4	exr	Variable Interest Entity Interest In Trust Number VariableInterestEntityInterestInTrustNumber	3	subsidiary
CY2020	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	13476000	USD
CY2018	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	18106000	USD
CY2020	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	3675000	USD
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	4742000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	4687000	USD
CY2020	us-gaap	Interest Expense Debt InterestExpenseDebt	17151000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	22710000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	22793000	USD
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	131357961	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	131357961	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020	exr	Common Stock Voting Rights Votes Number CommonStockVotingRightsVotesNumber	1	item
CY2017Q4	us-gaap	Stock Repurchase Program Period In Force1 StockRepurchaseProgramPeriodInForce1	P3Y
CY2017Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	400000000	USD
CY2020	exr	Stock Repurchased During Period Average Price StockRepurchasedDuringPeriodAveragePrice	82.09
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	67873000	USD
CY2020Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	400000000	USD
CY2020Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	400000000	USD
CY2019Q4	us-gaap	Due From Related Parties Noncurrent DueFromRelatedPartiesNoncurrent	100000000	USD
CY2020Q4	us-gaap	Due From Related Parties Noncurrent DueFromRelatedPartiesNoncurrent	100000000	USD
CY2020	exr	Average Closing Market Price Measurement Period AverageClosingMarketPriceMeasurementPeriod	P10D
CY2020	exr	Average Closing Market Price Measurement Period AverageClosingMarketPriceMeasurementPeriod	P10D
CY2020Q4	exr	Common Stock Average Closing Market Price CommonStockAverageClosingMarketPrice	114.15
CY2019Q4	exr	Noncontrolling Interest Operating Partnership Units Issued With Acquisition Value NoncontrollingInterestOperatingPartnershipUnitsIssuedWithAcquisitionValue	0	USD
CY2020Q4	us-gaap	Units Of Partnership Interest Amount UnitsOfPartnershipInterestAmount	5800785	shares
CY2020Q4	exr	Operating Partnership Units Redemption Amount OperatingPartnershipUnitsRedemptionAmount	662160000	USD
CY2020Q4	exr	Noncontrolling Interest Operating Partnership Units Redeemed For Common Stock NoncontrollingInterestOperatingPartnershipUnitsRedeemedForCommonStock	123993	shares
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
CY2020Q4	exr	Noncontrolling Interest Operating Partnership Units Redeemed For Cash NoncontrollingInterestOperatingPartnershipUnitsRedeemedForCash	0	shares
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
CY2020Q4	exr	Noncontrolling Interest Operating Partnership Units Redeemed Cash Paid NoncontrollingInterestOperatingPartnershipUnitsRedeemedCashPaid	0	USD
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
CY2020Q4	exr	Noncontrolling Interest Operating Partnership Units Issued With Acquisition NoncontrollingInterestOperatingPartnershipUnitsIssuedWithAcquisition	0	shares
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
CY2020Q4	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
CY2020	exr	Increase In Noncontrolling Interest Units Conversion Of Preferred Units IncreaseInNoncontrollingInterestUnitsConversionOfPreferredUnits	0	shares
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
CY2020	exr	Noncash Or Part Noncash Acquisition Finance Lease Liability NoncashOrPartNoncashAcquisitionFinanceLeaseLiability	41491000	USD
CY2020	exr	Number Of Acquired Stores With Land Leases NumberOfAcquiredStoresWithLandLeases	3	store
CY2020	exr	Noncash Or Part Noncash Acquisition Finance Lease Liability Construction NoncashOrPartNoncashAcquisitionFinanceLeaseLiabilityConstruction	8605000	USD
CY2019Q2	exr	Number Of Stores Added Under Operating Lease NumberOfStoresAddedUnderOperatingLease	22	store
CY2019Q3	exr	Number Of Stores Added Under Operating Lease NumberOfStoresAddedUnderOperatingLease	5	store
CY2020Q4	us-gaap	Lessor Operating Lease Term Of Contract LessorOperatingLeaseTermOfContract	P25Y
CY2020	exr	Lease Contract Term After Which Can Be Terminated LeaseContractTermAfterWhichCanBeTerminated	P10Y
CY2020	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
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	400000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	168000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	712000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	290000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	28709000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	20268000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	9056000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	5068000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	80000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	164000	USD
CY2020	us-gaap	Lease Cost LeaseCost	38957000	USD
CY2019	us-gaap	Lease Cost LeaseCost	25958000	USD
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	712000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	231000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	25037000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	19226000	USD
CY2020	exr	Cash Paid For Operating Activities Lessee CashPaidForOperatingActivitiesLessee	25749000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	50096000	USD
CY2019	exr	Cash Paid For Operating Activities Lessee CashPaidForOperatingActivitiesLessee	19457000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	8014000	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
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P78Y5M23D
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P46Y10M9D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P13Y11M26D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P14Y8M4D
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0347
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0607
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0366
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0365
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	8229000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	29565000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	1284000	USD
CY2020Q4	exr	Lessee Operating And Finance Lease Liability Payments Year One LesseeOperatingAndFinanceLeaseLiabilityPaymentsYearOne	30849000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	29591000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1485000	USD
CY2020Q4	exr	Lessee Operating And Finance Lease Liability Payments Due Year Two LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo	31076000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	29642000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1496000	USD
CY2020Q4	exr	Lessee Operating And Finance Lease Liability Payments Due Year Three LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearThree	31138000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	30008000	USD
CY2020Q4	exr	Lessee Operating And Finance Lease Liability Payments Due Year Five LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFive	32022000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1508000	USD
CY2020Q4	exr	Lessee Operating And Finance Lease Liability Payments Due Year Four LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFour	31516000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	30485000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	1537000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	199168000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	222529000	USD
CY2020Q4	exr	Lessee Operating And Finance Lease Liability Payments Due After Year Five LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueAfterYearFive	421697000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	348459000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	229839000	USD
CY2020Q4	exr	Lessee Operating And Finance Lease Liability Payments Due LesseeOperatingAndFinanceLeaseLiabilityPaymentsDue	578298000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	84974000	USD
CY2020Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	174836000	USD
CY2020Q4	exr	Lessee Operating And Finance Lease Liability Undiscounted Excess Amount LesseeOperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount	259810000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	263485000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	55003000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2020Q4	exr	Lessee Operating And Finance Lease Liability LesseeOperatingAndFinanceLeaseLiability	318488000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	1239557	shares
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
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	134930	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	35.26
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	71594	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	74.54
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y7M9D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1823000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	71594	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	74.54
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P4Y7M9D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	1823000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	71594	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	74.54
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4Y7M9D
CY2020Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	1823000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	10016000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	18089000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	3693000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2020	exr	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Forfeiture Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageForfeitureRate	0.074
CY2020Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	71594	shares
CY2020	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P4Y7M9D
CY2020Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	74.54
CY2020Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	71594	shares
CY2020Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	74.54
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	15553000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3347000	USD
CY2020Q4	exr	Maximum Percentage Of Annual Salary Which Plan Participants May Contribute To The Plan MaximumPercentageOfAnnualSalaryWhichPlanParticipantsMayContributeToThePlan	0.60
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3980000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3355000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2833000	USD
CY2020	exr	Percentage Of Matching Contribution Made By Company For First Three Percent Of Participants Compensation PercentageOfMatchingContributionMadeByCompanyForFirstThreePercentOfParticipantsCompensation	1
CY2020	exr	Maximum Percentage Of Compensation By Plan Participants Subject To Hundred Percent Matching Of Company MaximumPercentageOfCompensationByPlanParticipantsSubjectToHundredPercentMatchingOfCompany	0.03
CY2020	exr	Maximum Percentage Of Matching Contribution Made By Company For Next Two Percent Of Participants Compensation MaximumPercentageOfMatchingContributionMadeByCompanyForNextTwoPercentOfParticipantsCompensation	0.50
CY2020	exr	Maximum Percentage Of Compensation By Plan Participants Subject To Fifty Percent Matching Of Company MaximumPercentageOfCompensationByPlanParticipantsSubjectToFiftyPercentMatchingOfCompany	0.02
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	18900000	USD
CY2020	exr	Income Tax Credits And Adjustments Federal IncomeTaxCreditsAndAdjustmentsFederal	-5610000	USD
CY2020	exr	Income Tax Credits And Adjustments State IncomeTaxCreditsAndAdjustmentsState	-135000	USD
CY2020	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-5745000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	594000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	61000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	655000	USD
CY2020	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	10537000	USD
CY2020	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	3273000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13810000	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
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
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	111760000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
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 Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	83022000	USD
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
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	94270000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.177
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	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.182
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3075000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.006
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
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-363000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.001
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-207000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11308000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.025
CY2019	exr	Effective Income Tax Rate Reconciliation Tax Credits Adjustments EffectiveIncomeTaxRateReconciliationTaxCreditsAdjustments	0.008
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
CY2020	exr	Income Tax Reconciliation Tax Credits Adjustments IncomeTaxReconciliationTaxCreditsAdjustments	5745000	USD
CY2020	exr	Effective Income Tax Rate Reconciliation Tax Credits Adjustments EffectiveIncomeTaxRateReconciliationTaxCreditsAdjustments	0.011
CY2019	exr	Income Tax Reconciliation Tax Credits Adjustments IncomeTaxReconciliationTaxCreditsAdjustments	3663000	USD
CY2018	exr	Income Tax Reconciliation Tax Credits Adjustments IncomeTaxReconciliationTaxCreditsAdjustments	6016000	USD
CY2018	exr	Effective Income Tax Rate Reconciliation Tax Credits Adjustments EffectiveIncomeTaxRateReconciliationTaxCreditsAdjustments	0.013
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-647000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-2052000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.004
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1121000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.002
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13810000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.026
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	2006000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	2635000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9244000	USD
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.020
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	27374000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	23805000	USD
CY2020Q4	exr	Deferred Tax Liabilities Right Of Use Asset DeferredTaxLiabilitiesRightOfUseAsset	2223000	USD
CY2019Q4	exr	Deferred Tax Liabilities Right Of Use Asset DeferredTaxLiabilitiesRightOfUseAsset	2475000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	72000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	84000	USD
CY2020Q4	exr	Deferred Tax Liabilities State Taxes DeferredTaxLiabilitiesStateTaxes	3210000	USD
CY2019Q4	exr	Deferred Tax Liabilities State Taxes DeferredTaxLiabilitiesStateTaxes	3405000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	32879000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	29769000	USD
CY2020Q4	exr	Deferred Tax Assets Tax Deferred Captive Insurance Subsidiary DeferredTaxAssetsTaxDeferredCaptiveInsuranceSubsidiary	378000	USD
CY2019Q4	exr	Deferred Tax Assets Tax Deferred Captive Insurance Subsidiary DeferredTaxAssetsTaxDeferredCaptiveInsuranceSubsidiary	312000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	2325000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	2118000	USD
CY2020Q4	exr	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	2232000	USD
CY2019Q4	exr	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	2478000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Investment In Subsidiaries DeferredTaxAssetsInvestmentInSubsidiaries	219000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Investment In Subsidiaries DeferredTaxAssetsInvestmentInSubsidiaries	219000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1554000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	50000	USD
CY2020Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	6725000	USD
CY2019Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	7250000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	16068000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	14433000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	3302000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	3665000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	20113000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	19001000	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	52129000	USD
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
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	96594000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	89418000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	81256000	USD
CY2020	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	224444000	USD
CY2019	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	219857000	USD
CY2018	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	209050000	USD
CY2020	exr	Gains Losses On Real Estate Transactions Net Of Impairment Of Real Estate GainsLossesOnRealEstateTransactionsNetOfImpairmentOfRealEstate	18075000	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
CY2020	exr	Interest Expense Excluding Amortizationof Debt Discount Premium InterestExpenseExcludingAmortizationofDebtDiscountPremium	168626000	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
CY2020	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	3675000	USD
CY2018Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	7491831000	USD
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	4742000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	4687000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	15192000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	7467000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	5292000	USD
CY2020	exr	Income Loss And Dividend Income From Unconsolidated Real Estate Entities IncomeLossAndDividendIncomeFromUnconsolidatedRealEstateEntities	22361000	USD
CY2019	exr	Income Loss And Dividend Income From Unconsolidated Real Estate Entities IncomeLossAndDividendIncomeFromUnconsolidatedRealEstateEntities	11274000	USD
CY2018	exr	Income Loss And Dividend Income From Unconsolidated Real Estate Entities IncomeLossAndDividendIncomeFromUnconsolidatedRealEstateEntities	14452000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13810000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11308000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9244000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	517582000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	451123000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	447080000	USD
CY2020	exr	Sec Schedule1228 Real Estate Companies Investmentin Real Estateand Accumulated Depreciation Numberof Stores SECSchedule1228RealEstateCompaniesInvestmentinRealEstateandAccumulatedDepreciationNumberofStores	950	store
CY2020Q4	srt	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	2205072000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	1961349000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	6662685000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Carrying Costs RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts	951197000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	1955469000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	7619762000	USD
CY2020Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	9575231000	USD
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1681429000	USD
CY2020Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	7893802000	USD
CY2019Q4	us-gaap	Sec Schedule Iii Real Estate Investment Property Net SECScheduleIIIRealEstateInvestmentPropertyNet	7696864000	USD
CY2020Q4	srt	Real Estate Federal Income Tax Basis RealEstateFederalIncomeTaxBasis	7817038000	USD

Files In Submission

Name	View Source	Status
0001628280-21-003458-index-headers.html	Edgar Link	pending
0001628280-21-003458-index.html	Edgar Link	pending
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0001628280-21-003458-xbrl.zip	Edgar Link	pending
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exr-20201231_lab.xml	Edgar Link	unprocessable
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$EXR
Extra Space Storage Inc. Stock $exr

2019 Q4 Form 10-K Financial Statement

#000162828021003458 Filed on February 26, 2021

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

#000162828021003458 Filed on February 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EXR
Extra Space Storage Inc. Stock $exr