Impairment of Life Storage trade name Impairment of Life Storage trade name Impairment of trade name Gain (Loss) On Impairment Of Intangible Asset, Indefinite Lived Gain (Loss) On Impairment Of Intangible Asset, Indefinite Lived Federal funds rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Schedule of investments in unconsolidated real estate ventures Schedule Of Real Estate Joint Ventures [Table Text Block] Tabular disclosure of information related to real estate joint ventures. Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Statistical Measurement [Domain] Statistical Measurement [Domain] Share repurchase program, remaining authorization Share Repurchase Program, Remaining Authorized, Amount Cover page. Cover [Abstract] Net (decrease) increase in cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Note receivable interest rate Notes Receivable Stated Interest Rate Represents the stated interest rate of notes receivable. Principal payments received from notes receivable Proceeds from Collection of Notes Receivable Number of stores with amended leases Number Of Stores With Amended Leases Number Of Stores With Amended Leases Trading Symbol Trading Symbol Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Equity Ownership % Equity Method Investment, Ownership Percentage Extinguishment of Debt, Type [Domain] Extinguishment of Debt, Type [Domain] Total comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest All Trading Arrangements All Trading Arrangements [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Non-NEOs Non-NEOs [Member] Schedule of Computation of Earnings Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Number Of Stores [Domain] Number Of Stores [Domain] Number Of Stores [Domain] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Derivative [Line Items] Derivative [Line Items] Income taxes paid Income Taxes Paid, Net Other Commitments [Line Items] Other Commitments [Line Items] Distributions to Operating Partnership units held by noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Property rental Lease Income Pay vs Performance Disclosure [Line Items] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Noncontrolling interests in Operating Partnership Note Receivable Payoff Noncontrolling interests in Operating Partnership Note Receivable Payoff Noncontrolling interests in Operating Partnership, Payment Of Note Receivable Derivative [Table] Derivative [Table] Nine Stores Nine Stores [Member] Nine Stores Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Storage Portfolio II JV LLC Storage Portfolio II JV LLC [Member] Storage Portfolio II JV LLC [Member] Other liabilities Interest Rate Cash Flow Hedge Liability at Fair Value Investment in debt securities (in shares) Debt Securities, Held To Maturity, Number Of Shares Debt Securities, Held To Maturity, Number Of Shares Schedule of balance sheet classification and fair value of entity's derivative financial instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Fair Value Disclosures Fair Value Disclosures [Text Block] Interest Rate Line of Credit Facility, Interest Rate at Period End Award Timing Disclosures [Line Items] Investment, Name [Domain] Investment, Name [Domain] Other Performance Measure, Amount Other Performance Measure, Amount Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Preferred Operating Partnership Preferred Operating Partnership [Member] Preferred Operating Partnership [Member] Value of OP Units issued in conjunction with business combination and acquisitions Noncontrolling Interest, Operating Partnership Units Issued With Acquisition, Value Noncontrolling Interest, Operating Partnership Units Issued With Acquisition, Value Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-Maturity [Table] Number of operating stores held-for-sale Number Of Operating Stores Held For Sale Number Of Operating Stores Held For Sale Unsecured Term Loans Unsecured Term Loans [Member] Unsecured Term Loans Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Redemption of noncontrolling interests Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Proceeds from share issuances Proceeds from Issuance or Sale of Equity Entity Tax Identification Number Entity Tax Identification Number Schedule of Unsecured Senior Notes and Components of Debt Schedule of Long-Term Debt Instruments [Table Text Block] Gross operating real estate assets Real Estate Investment Property, at Cost PR II EXR JV LLC PR II EXR JV LLC [Member] PR II EXR JV LLC Operating Segments Operating Segments [Member] Life Storage Merger transition costs Asset Acquisition, Acquisition Related Costs Asset Acquisition, Acquisition Related Costs Investment in unconsolidated real estate ventures Asset Acquisition, Consideration Transferred, Investment In Real Estate Joint Ventures Asset Acquisition, Consideration Transferred, Investment In Real Estate Joint Ventures 2032 Long-Term Debt, Maturity, Year Eight Long-Term Debt, Maturity, Year Eight Receivable Type [Axis] Receivable Type [Axis] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Equity investment in joint venture partnerships Asset Acquisition, Equity Interests In Joint Venture Partnerships Asset Acquisition, Equity Interests In Joint Venture Partnerships Secured Debt Secured Debt [Member] Credit Line 1 First Credit Line [Member] First Credit Line [Member] JCAP Series B Preferred Stock JCAP Series B Preferred Stock [Member] JCAP Series B Preferred Stock Equity Components [Axis] Equity Components [Axis] Award Timing Method Award Timing Method [Text Block] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Debt securities - Preferred Stock Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss Fixed rate to total debt percentage Debt Instrument, Fixed Rate Debt To Total Debt Rate Debt Instrument, Fixed Rate Debt To Total Debt Rate Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Measurement Frequency [Axis] Measurement Frequency [Axis] ESS-CA TIVS JV LP ESS-CA TIVS JV LP [Member] ESS-CA TIVS JV LP Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Insider Trading Policies and Procedures [Line Items] Total expenses Operating expenses: Costs and Expenses Receivable [Domain] Receivable [Domain] Adjustment to Compensation, Amount Adjustment to Compensation Amount Tenant reinsurance Direct Premiums Earned Additional paid-in capital Additional Paid in Capital, Common Stock Compensation Amount Outstanding Recovery Compensation Amount Schedule of Components of Real Estate Assets Schedule Of Real Estate Assets [Table Text Block] Tabular disclosure of the components of real estate assets. It may include gross carrying amount, accumulated depreciation and net carrying amount. Number of states in which operating storage facilities are located Number of States in which Entity Operates Supplemental schedule of noncash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] At the Market Equity Distribution Agreement At The Market Equity Distribution Agreement [Member] At The Market Equity Distribution Agreement [Member] Senior Notes, Assumed From Life Storage Senior Notes, Assumed From Life Storage [Member] Senior Notes, Assumed From Life Storage Entity Small Business Entity Small Business Series D Units Series D Units [Member] Series D Units [Member] Company Selected Measure Amount Company Selected Measure Amount Acquisition of real estate assets and improvements Payments to Acquire Real Estate Tabular List, Table Tabular List [Table Text Block] Equity interest issued conversion ratio (in shares) Asset Acquisition, Equity Interest Issued or Issuable, Share Conversion Ratio Asset Acquisition, Equity Interest Issued or Issuable, Share Conversion Ratio Variable Rate Component [Domain] Variable Rate Component [Domain] [Domain] for Variable Rate Component [Axis] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Redemption of operating partnership units for common stock (in shares) Stock Issued During Period, Shares, Redemption Of Noncontrolling Interest Stock Issued During Period, Shares, Redemption Of Noncontrolling Interest Aggregate offering price of common shares Aggregate Offering Price Of Common Share Aggregate offering price of common share. Intangible assets - other Finite-Lived Intangible Assets Acquired Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Other liabilities Other Liabilities [Member] Anti-dilutive securities excluded from computation of earnings per common share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Loss on real estate assets held for sale Gains (Losses) On Real Estate Transactions And Earn Out From Prior Acquisition And Sale Of Other Assets Gains losses on real estate transactions and earn out from prior acquisition and sales of other assets Investment in debt securities Payments to Acquire Held-to-Maturity Securities Commitment to acquire stores, scheduled to close in current fiscal year Commitment To Acquire Retail Space, Expected To Close In Current Fiscal Year [Member] Commitment To Acquire Retail Space, Expected To Close In Current Fiscal Year Term Debt Term Debt [Member] Term Debt Asset Acquisition [Axis] Asset Acquisition [Axis] Cash, cash equivalents, and restricted cash, beginning of the period Cash, cash equivalents, and restricted cash, end of the period Cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Weighted average interest rate Debt, Weighted Average Interest Rate SmartStop Self Storage REIT, Inc. Preferred Stock SmartStop Self Storage REIT Inc Series A Convertible Preferred Stock [Member] SmartStop Self Storage REIT Inc Series A Convertible Preferred Stock [Member] Intangible lease rights Real Estate Investment Property, Intangible Lease Rights Real Estate Investment Property, Intangible Lease Rights Goodwill Goodwill Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Consolidation Items [Axis] Consolidation Items [Axis] Noncontrolling interests Asset Acquisition, Noncontrolling Interests Asset Acquisition, Noncontrolling Interests Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Share repurchase program, authorized amount Share Repurchase Program, Authorized, Amount Cash and other assets Asset Acquisition, Cash And Other Assets Asset Acquisition, Cash And Other Assets Debt securities, term Debt Securities Held To Maturity, Term Debt Securities Held To Maturity, Term Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Employee Stock Option Share-Based Payment Arrangement, Option [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Less: accumulated depreciation and amortization Real Estate Investment Property, Accumulated Depreciation Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Comprehensive income attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Preferred stock, outstanding (in shares) Preferred Stock, Shares Outstanding Security Exchange Name Security Exchange Name Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Award Type Award Type [Axis] Equipment and fixtures, net Property, Plant and Equipment, Net Principal payments on unsecured term loans and senior notes and revolving lines of credit Total consideration paid for repurchase Repayments of Debt Total liabilities Liabilities Cash dividends paid per common share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Excess Profit % Unconsolidated Joint Ventures Excess Profit Participation Percentage The percentage of excess profit participation in unconsolidated joint ventures. Number of Stores Equity Method Investment, Number Of Stores Equity Method Investment, Number Of Stores Common stock, par value (dollars per share) Common Stock, Par or Stated Value Per Share Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Purchase price Other Commitment Intangible assets, amortization period Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Expiration Date Trading Arrangement Expiration Date Income allocated to noncontrolling interest - Preferred Operating Partnership Units and Operating Partnership Units Net Income Loss Attributable To Noncontrolling Interest In Operating Partnership Net Income Loss Attributable To Noncontrolling Interest In Operating Partnership Total Shareholder Return Amount Total Shareholder Return Amount Common stock, issued (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Issued Other assets Other Assets [Member] Entity [Domain] Entity [Domain] Earnings and dividends allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Capacity Line of Credit Facility, Maximum Borrowing Capacity Investment in unconsolidated real estate entities Payments For Investment In Unconsolidated Real Estate Entities Payments For Investment In Unconsolidated Real Estate Entities Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Receivables, net Accounts Receivable, after Allowance for Credit Loss Gain (loss) recognized in OCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Debt Instrument [Line Items] Debt Instrument [Line Items] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Other assets, net Other assets, net Other Assets Common stock, authorized (in shares) Common Stock, Shares Authorized Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Notes Receivable - Bridge Loans Financing Receivable, after Allowance for Credit Loss Diluted (in shares) Average number of common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted JCAP Series A Preferred Stock JCAP Series A Preferred Stock [Member] JCAP Series A Preferred Stock Redemption of noncontrolling interests (in shares) Redemption of Operating Partnership units (in shares) Minority Interest, Decrease From Redemptions, Shares Minority Interest, Decrease From Redemptions, Shares Noncontrolling interests in Operating Partnership Noncontrolling Interest, Increase (Decrease) From Redemptions Of Operating Partnership Units Noncontrolling Interest, Increase (Decrease) From Redemptions Of Operating Partnership Units MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Loan to value ratio Financing Receivable, Loan To Value Ratio Financing Receivable, Loan To Value Ratio OP Units redeemed for common stock (in shares) Noncontrolling Interest, Operating Partnership Units Redeemed For Common Stock Noncontrolling Interest, Operating Partnership Units Redeemed For Common Stock Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Total Extra Space Storage Inc. stockholders' equity Equity, Attributable to Parent Real estate assets, net Real estate assets, net Real Estate Investment Property, Net Proceeds from unsecured term loans and senior notes and revolving lines of credit Proceeds from Issuance of Debt Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Balance Sheet Location [Axis] Statement of Financial Position Location, Balance [Axis] Number of joint ventures with property under development Number Of Joint Ventures With Property Under Development Number Of Joint Ventures With Property Under Development Gain (loss) reclassified from OCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Preferred units outstanding (in shares) Preferred Units, Outstanding Components of Other Assets Schedule of Other Assets [Table Text Block] Recurring Basis Fair Value, Recurring [Member] Redemption of Operating Partnership units held by noncontrolling interests for common stock Redemption Of Operating Partnership Units Held By Noncontrolling Interests For Common Stock [Abstract] Redemption Of Operating Partnership Units Held By Noncontrolling Interests For Common Stock [Abstract] Common stock and paid-in capital Redemption Of Operating Partnership Units Held By Noncontrolling Interest Including Additional Paid In Capital Redemption Of Operating Partnership Units Held By Noncontrolling Interest Including Additional Paid In Capital Ownership interest held Subsidiary, Ownership Percentage, Parent Secured notes payable, net Other Notes Payable Other unconsolidated real estate ventures (2) (3) Other Minority Owned Properties [Member] Other Minority Owned Properties [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Other liabilities Increase (Decrease) in Other Operating Liabilities Sale of Stock [Domain] Sale of Stock [Domain] Total Long-Term Debt Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Document Fiscal Period Focus Document Fiscal Period Focus 2028 Long-Term Debt, Maturity, Year Four All Executive Categories All Executive Categories [Member] Balance Sheet Location [Domain] Statement of Financial Position Location, Balance [Domain] Life Storage, Inc Life Storage, Inc [Member] Life Storage, Inc Debt securities, extension term Debt Securities Held To Maturity, Extension Term Debt Securities Held To Maturity, Extension Term HF10 Life Storage HHF Wasatch Holdings LLC Life Storage HHF Wasatch Holdings LLC [Member] Life Storage HHF Wasatch Holdings LLC Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Acquisitions and Dispositions Mergers, Acquisitions and Dispositions Disclosures [Text Block] Assets: Assets [Abstract] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax Document Type Document Type Derivative Contract [Domain] Derivative Contract [Domain] Thereafter Long-Term Debt, Maturity, After Year Eight Long-Term Debt, Maturity, After Year Eight Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Period used as a denomination to determine the average closing price of common stock Average Closing Market Price Measurement Period Represents the period over which the average market closing price is measured. Schedule of Financial Information of Business Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Dividends and Interest Receivable Dividends Receivable Real estate assets, estimated useful life Asset Acquisition, Real Estate Assets, Estimated Useful Life Asset Acquisition, Real Estate Assets, Estimated Useful Life Gain on sale of joint ventures Equity Method Investment, Realized Gain (Loss) on Disposal Life Storage Merger issuance of common stock and Operating Partnership units Life Storage Merger issuance of common stock and Operating Partnership units Life Storage Merger issuance of common stock and Operating Partnership units Trade name Indefinite-Lived Intangible Assets (Excluding Goodwill) Maximum Maximum [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Strategic Storage Trust VI, Inc. Preferred Stock Strategic Storage Trust VI, Inc. Preferred Stock [Member] Strategic Storage Trust VI, Inc. Preferred Stock 2031 Long-Term Debt, Maturity, Year Seven Long-Term Debt, Maturity, Year Seven Deferred financing costs Payments of Financing Costs Other intangible assets, net Finite-Lived Intangible Assets, Net Accounting Policies [Abstract] Accounting Policies [Abstract] Liquidation value (in dollars per share) Noncontrolling Interest In Preferred Operating Partnership Units Liquidation Value Per Unit Represents the liquidation value per unit of preferred operating partnership units. Revenues: Revenues [Abstract] Price per share (dollars per share) Shares Issued, Price Per Share Variable rate debt Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate Current Fiscal Year End Date Current Fiscal Year End Date Statistical Measurement [Axis] Statistical Measurement [Axis] PEO Name PEO Name Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Redemption of Preferred A Units for cash Payments to Noncontrolling Interests Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount All Award Types Award Type [Domain] Number of stores sold Equity Method Investment, Number Of Stores Sold Equity Method Investment, Number Of Investments Sold Name Outstanding Recovery, Individual Name Issuance of common stock for share based compensation, exercise of options and taxes paid upon net settlement, net (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Schedule of Antidilutive Shares Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Non-PEO NEO Non-PEO NEO [Member] OP Units issued in conjunction with business combination acquisitions (in units) Noncontrolling Interest, Operating Partnership Units Issued With Acquisition Noncontrolling Interest, Operating Partnership Units Issued With Acquisition Additional Paid-in Capital Additional Paid-in Capital [Member] Award Timing Predetermined Award Timing Predetermined [Flag] Dividends paid on common stock Payments of Ordinary Dividends, Common Stock VRS Self Storage, LLC VRS Self Storage LLC [Member] VRS Self Storage LLC [Member] Class of Stock [Line Items] Class of Stock [Line Items] Investment, Name [Axis] Investment, Name [Axis] Number of joint ventures operating store Number Of Joint Ventures Operating Number Of Joint Ventures Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Investment, preferred dividend rate Preferred Stock Investment, Dividend Rate Preferred Stock Investment, Dividend Rate Series A Preferred Stock Series A Preferred Stock [Member] Class of Stock [Axis] Class of Stock [Axis] Diluted (in dollars per share) Earnings Per Share, Diluted Name Measure Name Entity Interactive Data Current Entity Interactive Data Current Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Ownership [Axis] Ownership [Axis] Series A Units Series A Units [Member] Series A Units [Member] Real estate assets Asset Acquisition, Real Estate Assets Asset Acquisition, Real Estate Assets Preferred stock, issued (in shares) Preferred Stock, Shares Issued Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Total number of stores in consolidated joint venture Total Number Of Stores In Consolidated Joint Ventures Total Number Of Stores In Consolidated Joint Ventures Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Extinguishment of Debt [Axis] Extinguishment of Debt [Axis] Compensation expense related to share-based awards Share-Based Payment Arrangement, Noncash Expense Alan Jathoo JV LLC Alan Jathoo JV LLC [Member] Alan Jathoo JV LLC Accrual of interest income added to principal of debt securities and notes receivable Noncash Interest Income Noncash Interest Income HF5 Life Storage-HIERS Storage LLC Life Storage-HIERS Storage LLC [Member] Life Storage-HIERS Storage LLC Other assets Interest Rate Cash Flow Hedge Asset at Fair Value Net income Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Investments in Debt Securities and Bridge Loans Receivable Schedule Of Investments In Debt Securities And Financing Receivables [Table Text Block] Schedule Of Investments In Debt Securities And Financing Receivables Income tax expense Income tax expense Income Tax Expense (Benefit) Combined notional amount Derivative, Notional Amount Fair value of interest rate swaps Derivative Asset Fixed rate debt Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate Bridge loans, extension term Financing Receivable, Extension Term Financing Receivable, Extension Term Net income for diluted computations Net Income (Loss) Available to Common Stockholders, Diluted Management fees and other income Management fees and other income Revenue from Contract with Customer, Excluding Assessed Tax Schedule of information relating to gain (loss) recognized on swap agreements Derivative Instruments, Gain (Loss) [Table Text Block] Dividend rate, percentage Preferred Stock, Dividend Rate, Percentage Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Average share price (in dollars per share) Average Share Price Per Share Average Share Price Per Share Preferred Units by Name [Axis] Preferred Units by Name [Axis] Number of derivative financial instruments Derivative, Number of Instruments Held Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Income from operations Net operating income: Operating Income (Loss) Variable Rate [Domain] Variable Rate [Domain] Number of reportable segments Number of Reportable Segments Total liabilities, noncontrolling interests and equity Liabilities and Equity Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] All Adjustments to Compensation All Adjustments to Compensation [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Interest expense Interest Expense, Excluding Amortization Of Debt Discount (Premium) Interest Expense, Excluding Amortization Of Debt Discount (Premium) Cash for payoff of Life Storage credit facility and debt Asset Acquisition, Consideration Transferred, Cash Paid For Assumed Debt Asset Acquisition, Consideration Transferred, Cash Paid For Assumed Debt Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Legal Entity [Axis] Legal Entity [Axis] Interest income Investment Income, Interest Buildings, improvements and other intangibles Investment Building and Building Improvements Schedule of Maturities of Notes Payable Schedule of Maturities of Long-Term Debt [Table Text Block] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Individual: Individual [Axis] Life Storage Merger, net of cash acquired Payments For Asset Acquisition, Net Of Cash Acquired Payments For Asset Acquisition, Net Of Cash Acquired Taxes paid upon net settlement of share based compensation Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Development and redevelopment of real estate assets Payments to Develop Real Estate Assets Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Redemption period Preferred Stock, Redemption Period Preferred Stock, Redemption Period Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Restricted cash Restricted Cash Accounts payable, accrued expenses and other liabilities Asset Acquisition, Accounts Payable, Accrued Expenses And Other Liabilities Asset Acquisition, Accounts Payable, Accrued Expenses And Other Liabilities Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity Address, State or Province Entity Address, State or Province Statement [Line Items] Statement [Line Items] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Equity in earnings of unconsolidated real estate ventures - gain on sale of real estate assets and sale of a joint venture interest Equity in earnings of unconsolidated real estate ventures - gain on sale of real estate assets and sale of a joint venture interest Equity Method Investments, Gain (Loss) On Sale Of Real Estate Assets And Purchase Of Joint Venture Partner Interest Equity Method Investments, Gain (Loss) On Sale Of Real Estate Assets And Purchase Of Joint Venture Partner Interest Tenant reinsurance Tenant Reinsurance Expense The expense in the period incurred with respect to the entity's tenant reinsurance program. Accrued Construction Costs And Capital Expenditures [Abstract] Accrued Construction Costs And Capital Expenditures [Abstract] Accrued Construction Costs And Capital Expenditures [Abstract] Number of stores owned by franchisees and third parties Number Of Real Estate Properties Franchisees And Others The number of real estate properties owned by franchisees and other third parties as of the balance sheet date. Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Financial Instruments [Domain] Financial Instruments [Domain] Liabilities, Noncontrolling Interests and Equity: Liabilities and Equity [Abstract] Minimum Minimum [Member] Restatement Determination Date Restatement Determination Date Fair Value Estimate of Fair Value Measurement [Member] Fixed rate debt Notes Payable, Fair Value Disclosure Adoption Date Trading Arrangement Adoption Date Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Real estate assets - operating lease right-of-use assets Operating Lease, Right-of-Use Asset Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Segments [Axis] Segments [Axis] Issuance of common stock in connection with share based compensation (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] PRISA Self Storage LLC Prisa Self Storage LLC [Member] Prisa Self Storage LLC [Member] Number of sales agents Number Of Sales Agents Number Of Sales Agents Derivative Instrument [Axis] Derivative Instrument [Axis] Senior note balances Term debt Total Long-Term Debt, Gross Exercise Price Award Exercise Price Asset Acquisition [Table] Asset Acquisition [Table] Finance Lease Liability Noncash or Part Noncash Acquisition, Finance Lease Liability Noncash or Part Noncash Acquisition, Finance Lease Liability Earnings Per Common Share Earnings Per Share [Text Block] Arrangement Duration Trading Arrangement Duration Expenses: Costs and Expenses [Abstract] Loss on real estate assets held for sale Gains (Losses) On Real Estate Transactions, Net Of Impairment Of Real Estate Gains (Losses) On Real Estate Transactions, Net Of Impairment Of Real Estate Extra Space Storage Inc. stockholders' equity: Equity, Attributable to Parent [Abstract] Number of extensions available Line Of Credit Facility, Number Of Extensions Available Line Of Credit Facility, Number Of Extensions Available Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Segments [Domain] Segments [Domain] Derivative, termination value Derivative, Termination Value Derivative, Termination Value Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] All Individuals All Individuals [Member] Basis of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Depreciation and amortization Other Depreciation and Amortization PEO PEO [Member] Variable Rate [Axis] Variable Rate [Axis] Name Trading Arrangement, Individual Name Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Prepaid expenses and deposits Prepaid Expense And Deposits Prepaid Expense And Deposits Credit Line 2 Second Credit Line [Member] Second Credit Line [Member] Variable Rate Component [Axis] Variable Rate Component [Axis] Variable Rate Component [Axis] Shares exchanged (in shares) Debt Securities, Held To Maturity, Number Of Shares, Exchanged Debt Securities, Held To Maturity, Number Of Shares, Exchanged Shares exchanged, value Debt Securities, Held To Maturity, Number Of Shares, Exchanged, Value Debt Securities, Held To Maturity, Shares Exchanged, Value Offering costs associated with shelf registration Adjustments To Additional Paid in Capital, Stock Issued, Shelf Registration Offering Costs Adjustments To Additional Paid in Capital, Stock Issued, Shelf Registration Offering Costs Schedule of Information on Lines of Credit Schedule of Line of Credit Facilities [Table Text Block] Equity in earnings and dividend income from unconsolidated real estate entities Income (Loss) from Equity Method Investments Noncontrolling interests in Operating Partnership, net and other noncontrolling interests Noncontrolling Interest in Operating Partnerships 2024 Long-Term Debt, Maturity, Remainder of Fiscal Year Income before equity in earnings and dividend income from unconsolidated real estate entities and income tax expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest JCAP Series D Preferred Stock JCAP Series D Preferred Stock [Member] JCAP Series D Preferred Stock Storage Portfolio IV JV LLC Storage Portfolio IV JV LLC [Member] Storage Portfolio IV JV LLC Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Other Commitments [Domain] Other Commitments [Domain] Number of consolidated joint ventures Real Estate Consolidated Joint Ventures Number Represents the number of consolidated joint ventures as of the balance sheet date. Acquisition of real estate assets Real Estate Additions, Portion Not Yet Paid Real Estate Additions, Portion Not Yet Paid Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Local Phone Number Local Phone Number Commitment to acquire stores Commitment To Acquire Retail Space [Member] Commitment To Acquire Retail Space [Member] Redemption of units for stock Redemption Of Units For Common Stock [Member] Redemption Of Units For Common Stock Annual rate of return percentage Noncontrolling Interest In Preferred Operating Partnership Units Annual Rate Of Return Represents the annual rate of return of preferred operating partnership units. Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Other Assets Other Assets Disclosure [Text Block] Schedule of Equity Method Investments [Table] Equity Method Investment [Table] Asset Acquisition [Line Items] Asset Acquisition [Line Items] Repurchase of common stock (in shares) Stock Repurchased During Period, Shares Payment of draws from interest holdbacks Payment For Draw On Interest Reserves Payment For Draw On Interest Reserves Other assets Increase (Decrease) in Other Operating Assets Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] SOFR Secured Overnight Financing Rate (SOFR) [Member] PEO Total Compensation Amount PEO Total Compensation Amount Consideration transferred Equity Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable Unsecured senior notes, net Senior Notes Bridge loans, extension option Financing Receivable, Extension Option Financing Receivable, Extension Option Restricted stock grants cancelled (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Return of investment in unconsolidated real estate ventures Return Of Investment Real Estate Ventures Distributions that represent a return of original investment from real estate ventures. Offering costs associated with shelf registration Payments of Stock Issuance Costs Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Common stock Common Stock [Member] Measure: Measure [Axis] Issuance of common stock for share based compensation, exercise of options and taxes paid upon net settlement Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Value of units issued Real Estate Property Asset Acquisition, Consideration Transferred, Equity Interest Issued Or Issuable Real Estate Property Asset Acquisition, Consideration Transferred, Equity Interest Issued Or Issuable Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Issuance of common stock, net of offering costs (in shares) Stock Issued During Period, Shares, New Issues Consideration to be paid on redemption of common OP units Operating Partnership Units Redemption Amount Represents the amount the entity would have paid in cash to redeem the operating partnership units. Unsecured term loans, net Unsecured Debt Storage Portfolio I LLC Storage Portfolio I LLC [Member] Storage Portfolio I LLC [Member] Line of Credit Line of Credit [Member] Entity Emerging Growth Company Entity Emerging Growth Company Segment Reporting [Abstract] Segment Reporting [Abstract] Taxes paid upon net settlement of share based compensation (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Entity Central Index Key Entity Central Index Key 2029 Long-Term Debt, Maturity, Year Five Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Joint venture stores acquired Asset Acquisition, Number Of Consolidated Joint Venture Stores Acquired Asset Acquisition, Number Of Consolidated Joint Venture Stores Acquired Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Right of use asset - finance lease Finance Lease, Right-of-Use Asset, after Accumulated Amortization Stockholders' Equity Equity [Text Block] Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Equity Component [Domain] Equity Component [Domain] Preferred stock, par value (dollars per share) Preferred Stock, Par or Stated Value Per Share Financial Instrument [Axis] Financial Instrument [Axis] Notes Receivable-Bridge Loans Bridge Loan [Member] Segment Information Segment Reporting Disclosure [Text Block] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Entity Shell Company Entity Shell Company Measurement Basis [Axis] Measurement Basis [Axis] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code OP units Operating Partnership Units [Member] Operating Partnership Units Title Trading Arrangement, Individual Title Statement [Table] Statement [Table] Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Measurement Frequency [Domain] Measurement Frequency [Domain] Less: comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Consolidation Items [Domain] Consolidation Items [Domain] City Area Code City Area Code Transaction Costs Asset Acquisition, Consideration Transferred, Transaction Cost Real estate under development/redevelopment Development in Process Bridge loans, percent of notes held as mortgage receivables Financing Receivable, Percent Held as Mortgage Receivables Financing Receivable, Percent of Mortgage Receivables Deferred line of credit financing costs, net Deferred Costs Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Cash Paid Payments to Acquire Productive Assets Debt securities, dividend rate Debt Securities Held To Maturity, Dividend Rate Debt Securities Held To Maturity, Dividend Rate Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Unsecured senior notes Senior Notes [Member] Series B Units Series B Units [Member] Series B Units [Member] 2027 Long-Term Debt, Maturity, Year Three Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Amount reclassified as an increase to interest income Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Debt securities, period after which preferred dividends increase annually Debt Securities Held To Maturity, Period After Which Preferred Dividends Increase Annually Debt Securities Held To Maturity, Period After Which Preferred Dividends Increase Annually Other Commitments [Axis] Other Commitments [Axis] Interest Rate Swap, Forward-Starting Interest Rate Swap, Forward-Starting [Member] Interest Rate Swap, Forward-Starting Proceeds from issuance of public bonds, net Proceeds from Issuance of Unsecured Debt Earnings per common share Earnings Per Share [Abstract] Accumulated deficit Retained Earnings (Accumulated Deficit) Proceeds from sale of notes receivable Proceeds from Sale of Notes Receivable Loan Assumed Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Class of Stock [Domain] Class of Stock [Domain] Supplemental schedule of cash flow information Supplemental Cash Flow Elements [Abstract] General and administrative General and administrative expense General and Administrative Expense HF2 Sovran HHF Storage Holdings II LLC Sovran HHF Storage Holdings II LLC [Member] Sovran HHF Storage Holdings II LLC OP Units (in shares) Incremental Common Shares Attributable To Conversion Of Operating Partnership Units Shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible operating partnership units. 2026 Long-Term Debt, Maturity, Year Two Asset Acquisitions Asset Acquisition [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] 2030 Long-Term Debt, Maturity, Year Six Long-Term Debt, Maturity, Year Six Net income allocated to Operating Partnership and other noncontrolling interests Minority Interest In Net Income Loss Operating Partnerships And Other Amount of net income (loss) for the period allocated to noncontrolling partners of an operating partnership and others included in the entity's consolidated financial statements. Operating lease liabilities Operating Lease, Liability Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Underlying Securities Award Underlying Securities Amount Shares related to exchangeable senior notes and dilutive stock options (in shares) Incremental Common Shares Attributable To Share Based Payment Arrangements Stock Options Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements related to stock options. Tenant relationships, estimated useful life Asset Acquisition, Tenant Relationships, Estimated Useful Life Asset Acquisition, Tenant Relationships, Estimated Useful Life Net Liabilities/ (Assets) Assumed Asset Acquisition, Consideration Transferred, Other Assets Amendment Flag Amendment Flag Carrying Value Reported Value Measurement [Member] Entity Registrant Name Entity Registrant Name Fixed liquidation value (in shares) Noncontrolling Interest In Preferred Operating Partnership Units, Fixed Liquidation Value, Shares Noncontrolling Interest In Preferred Operating Partnership Units, Fixed Liquidation Value, Shares Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Depreciation and amortization Depreciation and amortization expense Depreciation, Depletion and Amortization HF1 Sovran HHF Storage Holdings LLC Sovran HHF Storage Holdings LLC [Member] Sovran HHF Storage Holdings LLC Debt securities, extension option Debt Securities Held To Maturity, Extension Option Debt Securities Held To Maturity, Extension Option Fair Value as of Grant Date Award Grant Date Fair Value Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Ten day average closing stock price (in dollars per share) Common Stock Average Closing Market Price The average closing market price of the entity's common stock. Other Other noncontrolling interests Non Controlling Interest Other [Member] Non Controlling Interest Other [Member] Shares issued (in shares) Sale of Stock, Number of Shares Issued in Transaction Less: Unamortized debt issuance costs Debt Issuance Costs, Net Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Debt Debt Disclosure [Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Noncontrolling Interests and Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Number of real estate properties to be acquired Number Of Real Estate Properties To Be Acquired Number Of Real Estate Properties To Be Acquired Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Issuance of common stock in connection with share based compensation Shares Issued, Value, Share-Based Payment Arrangement, before Forfeiture Issuance of common stock, net of offering costs Stock Issued During Period, Value, New Issues Purchase of equipment and fixtures Payments to Acquire Furniture and Fixtures Entity Address, Postal Zip Code Entity Address, Postal Zip Code Swap Agreements Interest Rate Swap [Member] Distributions to noncontrolling interests Payments of Ordinary Dividends, Noncontrolling Interest Restatement Determination Date: Restatement Determination Date [Axis] Title of 12(b) Security Title of 12(b) Security Common stock, $0.01 par value, 500,000,000 shares authorized, 211,981,742 and 211,278,803 shares issued and outstanding at September 30, 2024 and December 31, 2023, respectively Common Stock, Value, Issued Land Land Cash distributions in unconsolidated real estate ventures Cash Distributions In Unconsolidated Real Estate Ventures Cash Distributions In Unconsolidated Real Estate Ventures Issuance of common stock in conjunction with acquisitions, value Stock Issued During Period, Value, Acquisitions Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value HF6 191 V Life Storage Holdings LLC 191 V Life Storage Holdings LLC [Member] 191 V Life Storage Holdings LLC Trade name Indefinite-Lived Intangible Assets Acquired Issuance of common stock in conjunction with acquisitions (in shares) Stock Issued During Period, Shares, Acquisitions Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Self-Storage Operations Self Storage Operations [Member] Self Storage Operations [Member] OP units conversion ratio Shareholders' Equity, Units Conversion Ratio Shareholders' Equity, Units Conversion Ratio Dividend rate increase, threshold Preferred Stock, Dividend Rate Increase, Threshold Preferred Stock, Dividend Rate Increase, Threshold Issuance and purchase of notes receivable Issuance and purchase of notes receivable Payments to Acquire Notes Receivable Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Noncontrolling interest in consolidated joint ventures Noncontrolling Interest, Increase From Transactions With Other Noncontrolling Interests, Net Noncontrolling Interest, Increase From Transactions With Other Noncontrolling Interests, Net Preferred stock, $0.01 par value, 50,000,000 shares authorized, no shares issued or outstanding Preferred Stock, Value, Issued Number Of Stores [Member] Number Of Stores [Axis] Number Of Stores Number of stores purchased Equity Method Investment, Number Of Stores Purchased Equity Method Investment, Number Of Stores Purchased Noncontrolling Interest Represented by Preferred Operating Partnership Units Noncontrolling Interest in Operating Partnership and Other Noncontrolling Interests Noncontrolling Interest Disclosure [Text Block] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Basic (in dollars per share) Earnings Per Share, Basic Real Estate Assets Real Estate Disclosure [Text Block] Proceeds from sale of real estate assets and investments in real estate ventures Proceeds from Sale, Real Estate, Held-for-Investment Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Earnings per common share Earnings Per Share, Basic and Diluted EPS [Abstract] Earnings Per Share, Basic and Diluted EPS Ownership [Domain] Ownership [Domain] Investments in Debt Securities and Notes Receivable Investments In Debt Securities And Financing Receivables [Text Block] Investments In Debt Securities And Financing Receivables Accounts payable and accrued expenses Capital Expenditures Incurred but Not yet Paid Noncontrolling interest represented by Preferred Operating Partnership units, net Noncontrolling Interest in Preferred Unit Holders Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Earnings for basic computations Net Income (Loss) Available to Common Stockholders, Basic Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Tenant Reinsurance Tenant Reinsurance [Member] Tenant Reinsurance [Member] Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Total assets Assets Revolving lines of credit Amount Drawn Long-Term Line of Credit Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Commitments and contingencies Commitments and Contingencies Number of operating storage facilities in which the entity has equity interests (in stores) Number of Real Estate Properties Investments in Unconsolidated Real Estate Entities Equity Method Investments and Joint Ventures Disclosure [Text Block] Wholly-owned stores acquired Asset Acquisition, Number Of Wholly Owned Stores Acquired Asset Acquisition, Number Of Wholly Owned Stores Acquired Termination Date Trading Arrangement Termination Date Organization Nature of Operations [Text Block] Common OP Units Common OP Units [Member] Common OP Units Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Total revenues Revenues: Revenues Notes Payable Notes Payable to Banks [Member] 2025 Long-Term Debt, Maturity, Year One ESS Bristol Investments LLC ESS Bristol Investments LLC [Member] ESS Bristol Investments LLC Other liabilities Other Liabilities Total consideration Total Asset Acquisition, Consideration Transferred Number of operating stores owned and/or managed Number Of Real Estate Properties Owned And Or Managed The number of real estate properties owned and/or managed as of the balance sheet date. Entity Address, City or Town Entity Address, City or Town Debt Instrument [Axis] Debt Instrument [Axis] Investments in debt securities and notes receivable Investments in debt securities and notes receivable Debt Securities, Held To Maturity And Financing Receivable, After Allowance For Credit Loss, And Interest Receivable Debt Securities, Held To Maturity And Financing Receivable, After Allowance For Credit Loss, And Interest Receivable Derivatives with contingent features, net liability position Derivative With Contingent Features, Fair Value Of Asset (Liability), Net Derivative With Contingent Features, Fair Value Of Asset (Liability), Net Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Net income attributable to common stockholders Net income attributable to common stockholders Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Schedule of Fair Value of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Investments, Debt and Equity Securities [Abstract] Number of Stores Number Of Real Estate Properties Acquired Represents the number of real estate properties acquired. Other Commitments [Table] Other Commitments [Table] Non-cash interest expense related to amortization of discount on Life Storage unsecured senior notes Non-cash interest expense related to amortization of discount on Life Storage unsecured senior notes Amortization of Debt Discount (Premium) Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Loan receivable, reduction of noncontrolling interests Note Receivable, Reduction Of Noncontrolling Interests Note Receivable, Reduction Of Noncontrolling Interests Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Number of debt securities past due or nonaccrual status Number Of Debt Securities Past Due Or Nonaccrual Status Number Of Debt Securities Past Due Or Nonaccrual Status Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net income allocated to Preferred Operating Partnership noncontrolling interests Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable Investment balance Investment In Unconsolidated Real Estate Entities, Net Of Distributions Investment In Unconsolidated Real Estate Entities, Net Of Distributions Unsecured senior notes Asset Acquisition, Unsecured Senior Notes Asset Acquisition, Unsecured Senior Notes Entity File Number Entity File Number Lines Of Credit Lines Of Credit [Member] Lines Of Credit Change in fair value of interest rate swaps Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Document Fiscal Year Focus Document Fiscal Year Focus Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Extinguishment of liability component Extinguishment of Debt, Amount Weighted average number of shares Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Dividends paid on common stock Dividends, Common Stock Name Forgone Recovery, Individual Name Fair value of net assets acquired Asset Acquisition, Assets Acquired and Liabilities Assumed, Net Asset Acquisition, Assets Acquired and Liabilities Assumed, Net Discount on unsecured senior notes Debt Instrument, Unamortized Discount (Premium), Net Document Period End Date Document Period End Date Sale of Stock [Axis] Sale of Stock [Axis] Contributions from noncontrolling interests Proceeds from Noncontrolling Interests Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Base rate Base Rate [Member] Distributions from unconsolidated real estate ventures Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Insider Trading Arrangements [Line Items] Fixed liquidation value Noncontrolling Interest In Preferred Operating Partnership Units Fixed Liquidation Value Represents the fixed liquidation value of preferred operating partnership units. Investment redemption restriction period Preferred Stock Investment, Redemption Restriction Period Preferred Stock Investment, Redemption Restriction Period Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Intangible assets - tenant relationships Real Estate Investment Property, Intangible Tenant Relationships Real Estate Investment Property, Intangible Tenant Relationships Real Estate [Abstract] Real Estate [Abstract] Fair Value of Financial Instruments [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Property operations Cost of Revenue Adjustment to Compensation: Adjustment to Compensation [Axis] Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Period after which preferred stock dividend is subject to increase Preferred Stock Investment, Period After Which Dividend Rate Is Subject To Increase Preferred Stock Investment, Period After Which Dividend Rate Is Subject To Increase OP Unit Redemption - Cash Proceeds Operating Partnership Unit Redemption, Cash Proceeds Operating Partnership Unit Redemption, Cash Proceeds Redeemable Noncontrolling Interest Redeemable Noncontrolling Interest [Table Text Block] Principal amount of notes sold Financing Receivable, Sale and Reclassification to Held-for-Sale Bridge loans, original maturities Financing Receivable, Term Financing Receivable, Term Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Current Reporting Status Entity Current Reporting Status Accumulated Deficit Retained Earnings [Member] Ownership interest held by joint venture partner Subsidiary, Ownership Percentage, Noncontrolling Owner Amortization of deferred financing costs Amortization of Debt Issuance Costs Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Asset Acquisition [Domain] Asset Acquisition [Domain] Real estate assets held for sale included in real estate assets, net Real Estate, Held-for-Sale Net operating real estate assets Net Operating Real Estate Assets The carrying amount of real estate assets including land, buildings, improvements, intangible assets and intangible lease rights, net of accumulated depreciation and amortization. Life Storage Merger issuance of common stock and Operating Partnership units (in shares) Noncontrolling Interest, Operating Partnership Units Issued With Asset Acquisition, Shares Noncontrolling Interest, Operating Partnership Units Issued With Asset Acquisition, Shares Operating Partnership Common Operating Partnership [Member] Common Operating Partnership [Member] Basic (in shares) Average number of common shares outstanding - basic Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Preferred Units, Class [Domain] Preferred Units, Class [Domain] Extension term Line Of Credit Facility, Extension Term Line Of Credit Facility, Extension Term Total noncontrolling interests and equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Number of stores with new triple-net lease agreement Number Of Stores With New Triple-Net Lease Agreements Number Of Stores With New Triple-Net Lease Agreements Investments in unconsolidated real estate entities Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures Investment grade election Specified Investment Grade Rating And Elects To Use Alternative Rates [Member] Specified Investment Grade Rating And Elects To Use Alternative Rates [Member] Investment in shares Payments to Acquire Investments Name Awards Close in Time to MNPI Disclosures, Individual Name Series C Units Series C Units [Member] Series C Units Entity Filer Category Entity Filer Category Balances of OP Units Noncontrolling Interest [Table Text Block] Noncontrolling Interest Company Selected Measure Name Company Selected Measure Name