Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Variable Rate [Domain] Variable Rate [Domain] 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. Pay vs Performance Disclosure [Line Items] Statistical Measurement [Domain] Statistical Measurement [Domain] Capacity Line of Credit Facility, Maximum Borrowing Capacity Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Underlying Security Market Price Change Underlying Security Market Price Change, Percent All Award Types Award Type [Domain] Fair Value as of Grant Date Award Grant Date Fair Value Note receivable interest rate Notes Receivable Stated Interest Rate Represents the stated interest rate of notes receivable. Investment, Name [Domain] Investment, Name [Domain] Interest Rate Line of Credit Facility, Interest Rate at Period End Debt Debt Disclosure [Text Block] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Investments, Debt and Equity Securities [Abstract] Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] 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] Segment Reporting [Abstract] Segment Reporting [Abstract] Restatement Determination Date: Restatement Determination Date [Axis] Investment, Name [Axis] Investment, Name [Axis] Investment in shares Payments to Acquire Investments Property rental Lease Income Commitments and contingencies Commitments and Contingencies Insider Trading Policies and Procedures [Line Items] Price per share (dollars per share) Shares Issued, Price Per Share Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] 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 Proceeds from share issuances and redemption of stock options for cash, net Proceeds from Issuance or Sale of Equity Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Stockholders' Equity Equity [Text Block] Storage Portfolio II JV LLC Storage Portfolio II JV LLC [Member] Storage Portfolio II JV LLC [Member] Investment in debt securities (in shares) Debt Securities, Held To Maturity, Number Of Shares Debt Securities, Held To Maturity, Number Of Shares Gross operating real estate assets Real Estate Investment Property, at Cost Ownership [Axis] Ownership [Axis] Issuance of common stock in connection with share based compensation (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture Preferred Operating Partnership Preferred Operating Partnership [Member] Preferred Operating Partnership [Member] Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Unsecured Term Loans Unsecured Term Loans [Member] Unsecured Term Loans Preferred stock, par value (dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, $0.01 par value, 50,000,000 shares authorized, no shares issued or outstanding Preferred Stock, Value, Issued Subsequent Event Type [Domain] Subsequent Event Type [Domain] Issuance and purchase of notes receivable Issuance and purchase of notes receivable Payments to Acquire Notes Receivable Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Dividends paid on common stock Payments of Ordinary Dividends, Common Stock Diluted (in dollars per share) Earnings Per Share, Diluted PEO Total Compensation Amount PEO Total Compensation Amount Land Land Receivable [Domain] Receivable [Domain] Supplemental schedule of cash flow information Supplemental Cash Flow Elements [Abstract] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] PR II EXR JV LLC PR II EXR JV LLC [Member] PR II EXR JV LLC Extinguishment of liability component Extinguishment of Debt, Amount Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Line of Credit Line of Credit [Member] 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 Trading Symbol Trading Symbol Equity investment in joint venture partnerships Asset Acquisition, Equity Interests In Joint Venture Partnerships Asset Acquisition, Equity Interests In Joint Venture Partnerships Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Extinguishment of Debt, Type [Domain] Extinguishment of Debt, Type [Domain] Credit Line 1 First Credit Line [Member] First Credit Line [Member] Net income attributable to common stockholders Net income attributable to common stockholders Net Income (Loss) JCAP Series B Preferred Stock JCAP Series B Preferred Stock [Member] JCAP Series B Preferred Stock Derivative Contract [Domain] Derivative Contract [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Company Selected Measure Name Company Selected Measure Name Fixed rate to total debt percentage Debt Instrument, Fixed Rate Debt To Total Debt Rate Debt Instrument, Fixed Rate Debt To Total Debt Rate ESS-CA TIVS JV LP ESS-CA TIVS JV LP [Member] ESS-CA TIVS JV LP Liabilities, Noncontrolling Interests and Equity: Liabilities and Equity [Abstract] 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) Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Federal funds rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Extra Space Storage Inc. stockholders' equity: Equity, Attributable to Parent [Abstract] Gain (loss) recognized in OCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Schedule of Computation of Earnings Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] 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. 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 Executive Category: Executive Category [Axis] Intangible assets, amortization period Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Series D Units Series D Units [Member] Series D Units [Member] Equity interest issued conversion ratio Asset Acquisition, Equity Interest Issued or Issuable, Share Conversion Ratio Asset Acquisition, Equity Interest Issued or Issuable, Share Conversion Ratio Other Commitments [Table] Other Commitments [Table] Variable Rate Component [Domain] Variable Rate Component [Domain] [Domain] for Variable Rate Component [Axis] 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. Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Name Measure Name Name Forgone Recovery, Individual Name Carrying Value Reported Value Measurement [Member] Goodwill Goodwill Equity Components [Axis] Equity Components [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] 2026 Long-Term Debt, Maturity, Year Two Asset Acquisition [Domain] Asset Acquisition [Domain] Measurement Basis [Axis] Measurement Basis [Axis] 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 Underlying Securities Award Underlying Securities Amount Entity Small Business Entity Small Business Local Phone Number Local Phone Number Fair Value Measurement [Domain] Fair Value Measurement [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] 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] Combined notional amount Derivative, Notional Amount 2024 Long-Term Debt, Maturity, Remainder of Fiscal Year Intangible lease rights Real Estate Investment Property, Intangible Lease Rights Real Estate Investment Property, Intangible Lease Rights Redemption of Preferred Operating Partnership units for common stock Redemption Of Preferred Operating Partnership Units For Common Stock [Abstract] Redemption Of Preferred Operating Partnership Units For Common Stock Measurement Frequency [Axis] Measurement Frequency [Axis] Noncontrolling interests Asset Acquisition, Noncontrolling Interests Asset Acquisition, Noncontrolling Interests Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Cash and other assets Asset Acquisition, Cash And Other Assets Asset Acquisition, Cash And Other Assets Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Debt securities, term Debt Securities Held To Maturity, Term Debt Securities Held To Maturity, Term Acquisition of real estate assets and improvements Payments to Acquire Real Estate Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Schedule of Unsecured Senior Notes and Components of Debt Schedule of Long-Term Debt Instruments [Table Text Block] Redemption of units for stock and cash Redemption Of Units For Stock And Cash [Member] Redemption Of Units For Stock And Cash Taxes paid upon net settlement of share based compensation Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Shares issued (in shares) Sale of Stock, Number of Shares Issued in Transaction Total revenues Revenues: Revenues Schedule of Fair Value of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Asset Acquisitions Asset Acquisition [Table Text Block] 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] Other Performance Measure, Amount Other Performance Measure, Amount Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Excess Profit % Unconsolidated Joint Ventures Excess Profit Participation Percentage The percentage of excess profit participation in unconsolidated joint ventures. Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Number of Stores Equity Method Investment, Number Of Stores Equity Method Investment, Number Of Stores Unvested restricted stock awards included for treasury stock method (in shares) Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends Fixed rate debt Notes Payable, Fair Value Disclosure Award Type Award Type [Axis] Anti-dilutive securities excluded from computation of earnings per common share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Document Quarterly Report Document Quarterly Report 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 Interest expense Interest Expense Dividends paid on common stock Dividends, Common Stock Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Intangible assets - other Finite-Lived Intangible Assets Acquired Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Trading Arrangement: Trading Arrangement [Axis] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Investment in unconsolidated real estate entities Payments For Investment In Unconsolidated Real Estate Entities Payments For Investment In Unconsolidated Real Estate Entities Net income allocated to Preferred Operating Partnership noncontrolling interests Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity File Number Entity File Number Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] 2027 Long-Term Debt, Maturity, Year Three Other liabilities Interest Rate Cash Flow Hedge Liability at Fair Value Components of Other Assets Schedule of Other Assets [Table Text Block] Real Estate [Abstract] Real Estate [Abstract] Entity Shell Company Entity Shell Company Other intangible assets, net Finite-Lived Intangible Assets, Net Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Restatement Determination Date Restatement Determination Date 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 Other liabilities Increase (Decrease) in Other Operating Liabilities Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] 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 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 Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Earnings and dividends allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Interest income Investment Income, Interest Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Weighted average number of shares Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Common stock, issued (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Issued Number of joint ventures with property under development Number Of Joint Ventures With Property Under Development Number Of Joint Ventures With Property Under Development Security Exchange Name Security Exchange Name Total Long-Term Debt 2028 Long-Term Debt, Maturity, Year Four Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Preferred Units, Class [Domain] Preferred Units, Class [Domain] 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] Employee Stock Option Employee Stock Option [Member] Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] 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 Other unconsolidated real estate ventures Other Minority Owned Properties [Member] Other Minority Owned Properties [Member] Noncontrolling Interest Represented by Preferred Operating Partnership Units Noncontrolling Interest in Operating Partnership and Other Noncontrolling Interests Noncontrolling Interest Disclosure [Text Block] Total expenses Operating expenses: Costs and Expenses Asset Acquisition [Table] Asset Acquisition [Table] Maximum Maximum [Member] Comprehensive income attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Document Type Document Type Life Storage, Inc Life Storage, Inc [Member] Life Storage, Inc Notes Payable Notes Payable to Banks [Member] 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 Variable rate debt Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate Tabular List, Table Tabular List [Table Text Block] Issuance of common stock in conjunction with acquisitions, value Stock Issued During Period, Value, Acquisitions Secured notes payable, net Other Notes Payable Entity Address, Address Line One Entity Address, Address Line One Thereafter Long-Term Debt, Maturity, After Year Eight Long-Term Debt, Maturity, After Year Eight Real estate under development/redevelopment Development in Process 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. Receivable Type [Axis] Receivable Type [Axis] Ownership interest held Subsidiary, Ownership Percentage, Parent Real estate assets, estimated useful life Asset Acquisition, Real Estate Assets, Estimated Useful Life Asset Acquisition, Real Estate Assets, Estimated Useful Life Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Fair Value of Financial Instruments [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Subsequent Event Subsequent Event [Member] Schedule of Information on Lines of Credit Schedule of Line of Credit Facilities [Table Text Block] Strategic Storage Trust VI, Inc. Preferred Stock Strategic Storage Trust VI, Inc. Preferred Stock [Member] Strategic Storage Trust VI, Inc. Preferred Stock Derivative [Table] Derivative [Table] 2031 Long-Term Debt, Maturity, Year Seven Long-Term Debt, Maturity, Year Seven Variable Rate [Axis] Variable Rate [Axis] Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities 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. Income Statement [Abstract] Income Statement [Abstract] Issuance of common stock, net of offering costs (in shares) Stock Issued During Period, Shares, New Issues Expenses: Costs and Expenses [Abstract] Title of 12(b) Security Title of 12(b) Security Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Asset Acquisition [Line Items] Asset Acquisition [Line Items] Extinguishment of Debt [Axis] Extinguishment of Debt [Axis] Distributions to noncontrolling interests Payments of Ordinary Dividends, Noncontrolling Interest Trade name Indefinite-Lived Intangible Assets (Excluding Goodwill) Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Ownership interest held by joint venture partner Subsidiary, Ownership Percentage, Noncontrolling Owner Operating Segments Operating Segments [Member] 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 Class of Stock [Line Items] Class of Stock [Line Items] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Less: accumulated depreciation and amortization Real Estate Investment Property, Accumulated Depreciation Entity Tax Identification Number Entity Tax Identification Number Other Commitments [Domain] Other Commitments [Domain] VRS Self Storage, LLC VRS Self Storage LLC [Member] VRS Self Storage LLC [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Real Estate Assets Real Estate Disclosure [Text Block] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Financial Instrument [Axis] Financial Instrument [Axis] Investment, preferred dividend rate Preferred Stock Investment, Dividend Rate Preferred Stock Investment, Dividend Rate Entity Interactive Data Current Entity Interactive Data Current Total Shareholder Return Amount Total Shareholder Return Amount Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Acquisitions and Dispositions Mergers, Acquisitions and Dispositions Disclosures [Text Block] Supplemental schedule of noncash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Series A Units Series A Units [Member] Series A Units [Member] Other assets Other Assets [Member] Real estate assets Asset Acquisition, Real Estate Assets Asset Acquisition, Real Estate Assets Segments [Domain] Segments [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Accumulated deficit Retained Earnings (Accumulated Deficit) Measure: Measure [Axis] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Name Outstanding Recovery, Individual Name Accrual of interest income added to principal of debt securities and notes receivable Noncash Interest Income Noncash Interest Income Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code HF5 Life Storage-HIERS Storage LLC Life Storage-HIERS Storage LLC [Member] Life Storage-HIERS Storage LLC Other Commitments [Line Items] Other Commitments [Line Items] 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 Entity Address, State or Province Entity Address, State or Province Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Bridge loans, extension term Financing Receivable, Extension Term Financing Receivable, Extension Term Common stock, outstanding (in shares) Common Stock, Shares, Outstanding PEO PEO [Member] Average share price (in dollars per share) Average Share Price Per Share Average Share Price Per Share Fixed component of income allocated to noncontrolling interest - Preferred Operating Partnership (Series A Units) Income (Loss) Attributable to Noncontrolling Interest Fixed Component Represents the component of income or loss attributable to the noncontrolling interest as a result of fixed distributions paid to Preferred Operating unit holders. Common stock, par value (dollars per share) Common Stock, Par or Stated Value Per Share Sale of Stock [Axis] Sale of Stock [Axis] Interest expense Interest Expense, Excluding Amortization Of Debt Discount (Premium) Interest Expense, Excluding Amortization Of Debt Discount (Premium) Net Liabilities/ (Assets) Assumed Asset Acquisition, Consideration Transferred, Other Assets Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] 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 Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Class of Stock [Domain] Class of Stock [Domain] Gain (loss) reclassified from OCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Earnings for basic computations Net Income (Loss) Available to Common Stockholders, Basic Swap Agreements Interest Rate Swap [Member] Debt Instrument [Axis] Debt Instrument [Axis] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Principal payments on unsecured term loans and senior notes and revolving lines of credit Total consideration paid for repurchase Repayments of Debt Operating lease liabilities Operating Lease, Liability 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] Total liabilities Liabilities Asset Acquisition [Axis] Asset Acquisition [Axis] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Redemption period Preferred Stock, Redemption Period Preferred Stock, Redemption Period Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount 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 Measurement Frequency [Domain] Measurement Frequency [Domain] All Executive Categories All Executive Categories [Member] Fixed rate debt Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Tenant reinsurance Tenant Reinsurance Expense The expense in the period incurred with respect to the entity's tenant reinsurance program. 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. Debt Disclosure [Abstract] Debt Disclosure [Abstract] Additional paid-in capital Redemption Of Operating Partnership Units For Common Stock Including Additional Paid In Capital Represents the value of Operating Partnership units redeemed for common stock including additional paid in capital. Number of reportable segments Number of Reportable Segments Earnings per common share Earnings Per Share [Abstract] Common stock, $0.01 par value, 500,000,000 shares authorized, 211,658,812 and 211,278,803 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively Common Stock, Value, Issued General and administrative General and administrative expense General and Administrative Expense Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Unsecured senior notes Senior Notes [Member] Number of joint ventures owning one operating store Number Of Joint Ventures Owning One Operating Store Number Of Joint Ventures Receivables, net Accounts Receivable, after Allowance for Credit Loss Restricted cash Restricted Cash All Individuals All Individuals [Member] Entity Filer Category Entity Filer Category Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Investment in debt securities Payments to Acquire Held-to-Maturity Securities 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 Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Statement [Table] Statement [Table] Other liabilities Other Liabilities Current Fiscal Year End Date Current Fiscal Year End Date Share repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Repurchase of common stock (in shares) Stock Repurchased During Period, Shares Proceeds from sale of notes receivable Proceeds from Sale, Real Estate, Held-for-Investment Finance Lease Liability Noncash or Part Noncash Acquisition, Finance Lease Liability Noncash or Part Noncash Acquisition, Finance Lease Liability PEO Name PEO Name Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Other assets Interest Rate Cash Flow Hedge Asset at Fair Value Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Base rate Base Rate [Member] Number of extensions available Line Of Credit Facility, Number Of Extensions Available Line Of Credit Facility, Number Of Extensions Available Preferred stock, outstanding (in shares) Preferred Stock, Shares Outstanding Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Derivative, termination value Derivative, Termination Value Derivative, Termination Value Class of Stock [Axis] Class of Stock [Axis] Investments in Unconsolidated Real Estate Entities Equity Method Investments and Joint Ventures Disclosure [Text Block] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Unsecured term loans, net Unsecured Debt Organization Nature of Operations [Text Block] Depreciation and amortization Depreciation and amortization expense Depreciation, Depletion and Amortization Deferred line of credit financing costs, net Deferred Costs Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Debt securities - Preferred Stock Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Preferred Units by Name [Axis] Preferred Units by Name [Axis] Prepaid expenses and deposits Prepaid Expense And Deposits Prepaid Expense And Deposits Business Combination and Asset Acquisition [Abstract] Total Extra Space Storage Inc. stockholders' equity Equity, Attributable to Parent Credit Line 2 Second Credit Line [Member] Second Credit Line [Member] Notes Receivable - Bridge Loans Financing Receivable, after Allowance for Credit Loss Consolidation Items [Axis] Consolidation Items [Axis] 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 Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] 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 Number of consolidated joint ventures Real Estate Consolidated Joint Ventures Number Represents the number of consolidated joint ventures as of the balance sheet date. Commitment to acquire stores with joint venture partners Commitment To Acquire Retail Space With Joint Venture Partners [Member] Commitment To Acquire Retail Space With Joint Venture Partners [Member] Preferred stock, issued (in shares) Preferred Stock, Shares Issued Other Assets Other Assets Disclosure [Text Block] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Entity Emerging Growth Company Entity Emerging Growth Company Commitment to acquire stores Commitment To Acquire Retail Space [Member] Commitment To Acquire Retail Space [Member] Less: Unamortized debt issuance costs Debt Issuance Costs, Net Redemption of units for stock Redemption Of Units For Common Stock [Member] Redemption Of Units For Common Stock Cash Paid Payments to Acquire Productive Assets 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. Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Schedule of information relating to gain (loss) recognized on swap agreements Derivative Instruments, Gain (Loss) [Table Text Block] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Payment of draws from interest holdbacks Payment For Draw On Interest Reserves Payment For Draw On Interest Reserves Document Fiscal Period Focus Document Fiscal Period Focus Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Title Trading Arrangement, Individual Title Compensation expense related to share-based awards Share-Based Payment Arrangement, Noncash Expense Bridge loans, extension option Financing Receivable, Extension Option Financing Receivable, Extension Option Development and redevelopment of real estate assets Payments to Develop Real Estate Assets Common stock Common Stock [Member] Individual: Individual [Axis] City Area Code City Area Code Entity Address, Postal Zip Code Entity Address, Postal Zip Code Earnings Per Common Share Earnings Per Share [Text Block] Discount on unsecured senior notes Debt Instrument, Unamortized Discount (Premium), Net 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 Equity Ownership % Equity Method Investment, Ownership Percentage Document Fiscal Year Focus Document Fiscal Year Focus 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. Weighted average interest rate Debt, Weighted Average Interest Rate Total noncontrolling interests and equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Distributions to Operating Partnership units held by noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Storage Portfolio I LLC Storage Portfolio I LLC [Member] Storage Portfolio I LLC [Member] Redemption of Operating Partnership units for cash Cash Portion Of Redemption Of Preferred Operating Partnership Units The amount of cash paid upon the redemption of Preferred Operating Partnership Units. Minimum Minimum [Member] Equipment and fixtures, net Property, Plant and Equipment, Net Exercise Price Award Exercise Price Cash dividends paid per common share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Number of operating storage facilities in which the entity has equity interests (in stores) Number of Real Estate Properties Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Dividends and Interest Receivable Dividends Receivable Assets: Assets [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Joint venture stores acquired Asset Acquisition, Number Of Consolidated Joint Venture Stores Acquired Asset Acquisition, Number Of Consolidated Joint Venture Stores Acquired Consideration transferred Equity Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable 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] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Income taxes paid Income Taxes Paid, Net Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Issuance of common stock in connection with share based compensation Shares Issued, Value, Share-Based Payment Arrangement, before Forfeiture Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Earnings and dividends allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Accumulated Deficit Retained Earnings [Member] SOFR Secured Overnight Financing Rate (SOFR) [Member] Secured Overnight Financing Rate (SOFR) Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Total liabilities, noncontrolling interests and equity Liabilities and Equity OP units Operating Partnership Units [Member] Operating Partnership Units Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Ownership [Domain] Ownership [Domain] Change in fair value of interest rate swaps Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Basic (in dollars per share) Earnings Per Share, Basic Real estate assets - operating lease right-of-use assets Operating Lease, Right-of-Use Asset Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Accounting Policies [Abstract] Accounting Policies [Abstract] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Sale of Stock [Domain] Sale of Stock [Domain] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Net income for diluted computations Net Income (Loss) Available to Common Stockholders, Diluted Arrangement Duration Trading Arrangement Duration Bridge loans, percent of notes held as mortgage receivables Financing Receivable, Percent Held as Mortgage Receivables Financing Receivable, Percent of Mortgage Receivables Entity Address, City or Town Entity Address, City or Town Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Schedule of Financial Information of Business Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Debt securities, dividend rate Debt Securities Held To Maturity, Dividend Rate Debt Securities Held To Maturity, Dividend Rate Series B Units Series B Units [Member] Series B Units [Member] 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] Document Transition Report Document Transition Report Award Timing Predetermined Award Timing Predetermined [Flag] Real estate assets, net Real estate assets, net Real Estate Investment Property, Net Distributions from unconsolidated real estate ventures Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Share repurchase program, remaining authorization Stock Repurchase Program, Remaining Authorized Repurchase Amount Redemption of noncontrolling interests Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Termination Date Trading Arrangement Termination Date Common stock, authorized (in shares) Common Stock, Shares Authorized 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 Depreciation and amortization Other Depreciation and Amortization Principal payments received from notes receivable Proceeds from Collection of Notes Receivable Interest Rate Swap, Forward-Starting Interest Rate Swap, Forward-Starting [Member] Interest Rate Swap, Forward-Starting 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] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Derivative Instrument [Axis] Derivative Instrument [Axis] 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. Senior note balances Term debt Total Long-Term Debt, Gross 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] All Trading Arrangements All Trading Arrangements [Member] 2030 Long-Term Debt, Maturity, Year Six Long-Term Debt, Maturity, Year Six Notes Receivable-Bridge Loans Bridge Loan [Member] 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. Amount reclassified as an increase to interest income Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net All Adjustments to Compensation All Adjustments to Compensation [Member] Derivative [Line Items] Derivative [Line Items] Award Timing Disclosures [Line Items] 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 Compensation Amount Outstanding Recovery Compensation Amount Less: comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest 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 Other Commitments [Axis] Other Commitments [Axis] Fair value of interest rate swaps Derivative Asset 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 Subsequent Event Type [Axis] Subsequent Event Type [Axis] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [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] Investments in unconsolidated real estate entities Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures Number of real estate properties to be acquired Number Of Real Estate Properties To Be Acquired Number Of Real Estate Properties To Be Acquired Insider Trading Arrangements [Line Items] 2025 Long-Term Debt, Maturity, Year One Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Other assets, net Other assets, net Other Assets Transaction Costs Asset Acquisition, Consideration Transferred, Transaction Cost 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 Cash distributions in unconsolidated real estate ventures Cash Distributions In Unconsolidated Real Estate Ventures Cash Distributions In Unconsolidated Real Estate Ventures Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] HF6 191 V Life Storage Holdings LLC 191 V Life Storage Holdings LLC [Member] 191 V Life Storage Holdings LLC Other assets Increase (Decrease) in Other Operating Assets Issuance of common stock in conjunction with acquisitions (in shares) Stock Issued During Period, Shares, Acquisitions Adjustment to Compensation, Amount Adjustment to Compensation Amount Self-Storage Operations Self Storage Operations [Member] Self Storage Operations [Member] Document Period End Date Document Period End Date 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 Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Adoption Date Trading Arrangement Adoption Date Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Dividend rate, percentage Preferred Stock, Dividend Rate, Percentage 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] 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 Entity Central Index Key Entity Central Index Key Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Basis of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income tax expense Income tax expense Income Tax Expense (Benefit) Earnings per common share Earnings Per Share, Basic and Diluted EPS [Abstract] Earnings Per Share, Basic and Diluted EPS Right of use asset - finance lease Finance Lease, Right-of-Use Asset, after Accumulated Amortization Fair Value Disclosures Fair Value Disclosures [Text Block] Deferred financing costs Payments of Financing Costs Investments in Debt Securities and Notes Receivable Investments In Debt Securities And Financing Receivables [Text Block] Investments In Debt Securities And Financing Receivables Name Trading Arrangement, Individual Name Noncontrolling interest represented by Preferred Operating Partnership units, net Noncontrolling Interest in Preferred Unit Holders Earnings for basic computations Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted [Abstract] Tenant Reinsurance Tenant Reinsurance [Member] Tenant Reinsurance [Member] Issuance of common stock, net of offering costs Stock Issued During Period, Value, New Issues Management fees and other income Management fees and other income Revenue from Contract with Customer, Excluding Assessed Tax Entity [Domain] Entity [Domain] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Redeemable Noncontrolling Interest Redeemable Noncontrolling Interest [Table Text Block] Legal Entity [Axis] Legal Entity [Axis] Preferred Operating Partnership units Conversion of Stock, Amount Converted, Net Conversion of Stock, Amount Converted, Net Wholly-owned stores acquired Asset Acquisition, Number Of Wholly Owned Stores Acquired Asset Acquisition, Number Of Wholly Owned Stores Acquired Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Taxes paid upon net settlement of share based compensation (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Unsecured senior notes, net Senior Notes Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Total comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] 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. Number of derivative financial instruments Derivative, Number of Instruments Held Proceeds from issuance of public bonds, net Proceeds from Issuance of Unsecured Debt Diluted (in shares) Average number of common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted 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 Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Purchase price Other Commitment Number of Stores Number Of Real Estate Properties Acquired Represents the number of real estate properties acquired. Trade name Indefinite-Lived Intangible Assets Acquired Loan receivable, reduction of noncontrolling interests Note Receivable, Reduction Of Noncontrolling Interests Note Receivable, Reduction Of Noncontrolling Interests Company Selected Measure Amount Company Selected Measure Amount Additional paid-in capital Additional Paid in Capital, Common Stock Additional Paid-in Capital Additional Paid-in Capital [Member] 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 Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-Maturity [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Lines Of Credit Lines Of Credit [Member] Lines Of Credit Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Equity in earnings and dividend income from unconsolidated real estate entities Income (Loss) from Equity Method Investments Other liabilities Other Liabilities [Member] Cover page. Cover [Abstract] Number of states in which operating storage facilities are located Number of States in which Entity Operates Tenant reinsurance Direct Premiums Earned 2029 Long-Term Debt, Maturity, Year Five Amortization of deferred financing costs Amortization of Debt Issuance Costs Fair value of net assets acquired Asset Acquisition, Assets Acquired and Liabilities Assumed, Net Asset Acquisition, Assets Acquired and Liabilities Assumed, Net Recurring Basis Fair Value, Recurring [Member] Preferred units outstanding (in shares) Preferred Units, Outstanding Non-NEOs Non-NEOs [Member] 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 Total consideration Total Asset Acquisition, Consideration Transferred Segment Information Segment Reporting Disclosure [Text Block] Intangible assets - tenant relationships Real Estate Investment Property, Intangible Tenant Relationships Real Estate Investment Property, Intangible Tenant Relationships Net decrease in cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect 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 Secured Debt Secured Debt [Member] Non-PEO NEO Non-PEO NEO [Member] Equity Component [Domain] Equity Component [Domain] Adjustment to Compensation: Adjustment to Compensation [Axis] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Debt Instrument [Line Items] Debt Instrument [Line Items] Basic (in shares) Average number of common shares outstanding - basic Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status 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 Income from operations Net operating income: Operating Income (Loss) OP Unit Redemption - Cash Proceeds Operating Partnership Unit Redemption, Cash Proceeds Operating Partnership Unit Redemption, Cash Proceeds Bridge loans, original maturities Financing Receivable, Term Financing Receivable, Term Revenues: Revenues [Abstract] Restricted stock grants cancelled (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Property operations Cost of Revenue 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. Operating Partnership Common Operating Partnership [Member] Common Operating Partnership [Member] Series B and D Units (in shares) Incremental Common Shares Attributable to Exchangeable Preferred Operating Partnership Units Shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of exchangeable preferred operating partnership units. Extension term Line Of Credit Facility, Extension Term Line Of Credit Facility, Extension Term Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Segments [Axis] Segments [Axis] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Statement [Line Items] Statement [Line Items] Purchase of equipment and fixtures Payments to Acquire Furniture and Fixtures Fair Value Estimate of Fair Value Measurement [Member] Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax [Abstract] 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] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Noncontrolling interests in Operating Partnership, net and other noncontrolling interests Noncontrolling Interest in Operating Partnerships Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Revolving lines of credit Amount Drawn Long-Term Line of Credit Series C Units Series C Units [Member] Series C Units Noncontrolling Interests and Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Balances of OP Units Noncontrolling Interest [Table Text Block] Noncontrolling Interest