Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income [Member] The costs incurred during the period to purchase real estate assets, including brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties. Acquisition Related Costs Acquisition related costs Additional Paid in Capital, Common Stock Additional paid-in capital Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Compensation expense related to stock-based awards Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Tax effect from vesting of restricted stock grants and stock option exercises Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Paid-in capital Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net [Abstract] Tax effect from vesting of restricted stock grants and option exercises Amendment Flag Amendment Flag Amortization of Debt Discount (Premium) Amortization of discount Non-cash interest expense related to amortization of discount on equity component of exchangeable senior notes Non-cash interest expense related to amortization of discount on equity component of exchangeable senior notes Non-cash interest expense related to the amortization of discount on equity component of exchangeable senior notes Amortization of Financing Costs Amortization of deferred financing costs Amortization of Financing Costs and Discounts Non-cash interest expense related to amortization of premium on notes payable Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Anti-dilutive securities excluded from computation of earnings per common share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Arizona and Texas [Member] Arizona and Texas [Member] Arizona and Texas [Member] Assets Total assets Total assets Assets [Abstract] Assets: Represents the period over which the average market closing price is measured. Average Closing Market Price Measurement Period Period used as a denomination to determine the average closing price of common stock Average Share Price Per Share Average Share Price Per Share Average share price Award Type [Axis] Award Type [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Represents the basis of exchange for the entity's option to acquire operating partnership units in exchange for shares of its common stock. Basis Of Exchange Operating Partnership Units For Common Stock OP units conversion basis Basis of Presentation and Significant Accounting Policies [Text Block] Basis of Presentation Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination Payment for acquisition Total Consideration Paid Business Combination Purchase Price Business Combination Purchase Price Purchase price Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Acquisition Date Fair Value, Intangible Business Combinations [Abstract] Business Combinations [Abstract] Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value Previous equity interest, fair value Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage Equity Ownership (as a percent) Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Net Non-cash gain California One Property March Thirty Two Thousand And Fifteen [Member ] California One Property March Thirty Two Thousand And Fifteen [Member ] California 1 Property 3/30/2015 [Member ] California Properties December Two Thousand Thirteen [Member] California Properties December Two Thousand Thirteen [Member] California, Properties Acquired December 2013 [Member] California Twenty Property Two Thousand Thirteen September [Member] California Twenty Property Two Thousand Thirteen September [Member] California, 20 Properties Acquired 2013-September [Member] Reported Value Measurement [Member] Carrying Value [Member] Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of the period Cash and cash equivalents, beginning of the period Cash and cash equivalents Represents the amount of cash paid as part of an acquisition. Cash Paid As Part Of Acquisition Cash portion of payment for acquisition The amount of cash paid upon the redemption of Preferred Operating Partnership Units. Cash Portion Of Redemption Of Preferred Operating Partnership Units A units redeemed ,value Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Class of Stock [Domain] Class of Stock [Domain] Commitments and Contingencies Commitments and contingencies Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments And Contingencies [Table] Commitments And Contingencies [Table] Commitments And Contingencies [Table] Common Operating Partnership [Member] Common Operating Partnership [Member] Common Operating Partnership [Member] The average closing market price of the entity's common stock. Common Stock Average Closing Market Price Ten day average closing stock price Common Stock, Dividends, Per Share, Cash Paid Cash dividends paid per common share Dividends paid on common stock, per share Common Stock [Member] Par Value [Member] Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Balances (in shares) Balances (in shares) Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Common Stock, Value, Issued Common stock, $0.01 par value, 500,000,000 shares authorized, 116,458,159 and 116,360,239 shares issued and outstanding at March 31, 2015 and December 31, 2014, respectively Represents the value of the common units issued as part of an acquisition. Common Units Issued As Part Of Acquisition Value OP units issued as part of the acquisition Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less: comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Total comprehensive income Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk, Percentage Maximum percentage of rental income accounted for by any single tenant Concentration Risk Type [Domain] Concentration Risk Type [Domain] Contract Amount [Member] Contract Amount [Member] Contract Amount [Member] Conversion of units, estimated issuance of shares. Conversion of Units, Estimated Issuance of Shares Equivalent Shares (if converted) Convertible Debt Exchangeable senior notes Principal amount of liability component Convertible Debt, Fair Value Disclosures Exchangeable senior notes Convertible Debt [Member] 2033 Notes [Member] Convertible Debt Policy [Text Block] Convertible Debt Policy [Text Block] Convertible Debt Convertible Debt [Table Text Block] Schedule of Information about Carrying Amount of Equity Component, Principal Amount of Liability Component, Unamortized Discount and Net Carrying Amount for Notes Cost of Revenue Property operations Costs and Expenses Operating expenses, including depreciation and amortization Total expenses Costs and Expenses [Abstract] Expenses: Represents the estimated termination value on settlement of credit risk derivative liability, if provisions under the agreement is breached. Credit Risk Derivative Liabilities Expected Termination Value On Settlement Estimated termination value on settlement Current Fiscal Year End Date Current Fiscal Year End Date Customer Concentration Risk [Member] Customer Concentration Risk [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Convertible, Carrying Amount of Equity Component Carrying amount of equity component Debt Instrument, Convertible, Conversion Price Exchange price Debt Instrument, Convertible, Conversion Ratio Conversion ratio, number of shares per $1,000 principal amount, numerator Represents the percentage of debt discount that was originally recognized at the issuance of the instrument. Debt Instrument Discount Rate Discount rate (as a percent) Debt Instrument, Face Amount Principal amount of notes issued Debt Instrument Fair Value [Abstract] Debt Instrument Fair Value [Abstract] Debt Instrument Fair Value [Abstract] Debt Instrument Fair Value Carrying Value [Abstract] Debt Instrument Fair Value Carrying Value [Abstract] Debt Instrument Fair Value Carrying Value [Abstract] Debt Instrument, Interest Rate, Effective Percentage Effective interest rate on the liability component Debt Instrument, Interest Rate, Stated Percentage Interest rate Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] The principal amount of notes used as denominator for purposes of computing the conversion ratio of convertible debt. Debt Instrument Principal Amount Denomination For Conversion Into Common Stock Principal amount used for debt instrument conversion ratio Debt Instrument, Redemption Price, Percentage Redemption price as percentage of principal amount of notes plus accrued and unpaid interest Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument, Term Amortization period Debt Instrument, Unamortized Discount Unamortized cash discount Discount on exchangeable senior notes Unamortized cash discount Represents the amount of debt discount related to equity component that was originally recognized at the issuance of the instrument that has yet to be amortized. Debt Instrument Unamortized Discount Of Equity Component Unamortized discount-equity component Debt Instrument, Unamortized Discount (Premium), Net Premium on notes payable Debt Issuance Cost Issuance cost Depreciation, Depletion and Amortization Depreciation and amortization Depreciation and amortization expense Derivative Contract [Domain] Derivative Contract [Domain] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivatives [Abstract] Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivatives Derivative [Line Items] Derivative [Line Items] Derivative, Notional Amount Combined notional amount Derivative, Number of Instruments Held Number of derivative financial instruments Derivatives, Policy [Policy Text Block] Derivatives Derivative [Table] Derivative [Table] Direct Premiums Earned Tenant reinsurance Dividends, Common Stock Dividends paid on common stock at $0.47 per share Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Due from Related Parties Receivables from related parties and affiliated real estate joint ventures Fair value of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due after one year (or one business cycle). Due From Related Parties Fair Value Disclosure Notes receivable from Preferred Operating Partnership unit holders Due from Related Parties, Noncurrent Notes receivable from Preferred Operating Partnership unit holders Loan to holders of preferred OP units Note receivable from noncontrolling interest represented by Preferred Operating Partnership units Earnings Per Share [Abstract] Earnings Per Share [Abstract] Earnings Per Share, Basic Basic Earnings Per Share, Basic and Diluted [Abstract] Earnings per common share Earnings Per Share, Diluted Diluted Earnings Per Share [Line Items] Earnings Per Share [Line Items] Earnings Per Common Share [Line Items] Earnings Per Share, Policy [Policy Text Block] Earnings Per Common Share Earnings Per Share [Table] Earnings Per Share [Table] Earnings Per Share [Table] Earnings Per Share [Text Block] Earnings Per Common Share Employee Stock Option [Member] Stock Options [Member] Entity Central Index Key Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity [Domain] Entity [Domain] Entity Filer Category Entity Filer Category Entity gain (loss) on sale of property by joint venture. Entity Gain (Loss) on Sale of Property by Joint Venture Gain (loss) from sale of property Entity Registrant Name Entity Registrant Name Equity Component [Domain] Equity Component [Domain] Investment, Name [Domain] Investment, Name [Domain] Equity Method Investment, Ownership Percentage Ownership interest percentage Represents the percentage of ownership of common stock or equity participation in the investee prior to acquisition accounted for under the equity method of accounting. Equity Method Investment Ownership Percentage Prior to Acquisition Equity ownership prior to the acquisition (as a percent) Equity Method Investments And Cost Method Investments [Abstract] Equity Method Investments And Cost Method Investments [Abstract] Equity Method Investments And Cost Method Investments [Abstract] Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures Disclosure [Text Block] Equity in Earnings of Unconsolidated Real Estate Ventures - Gain on Sale of Real Estate and Purchase of Joint Venture Partners' Interests ESS Prisa Two LLC [Member] ESS Prisa Two LLC [Member] ESS PRISA II LLC [Member] ESS Statutory Trust III [Member] ESS Statutory Trust III [Member] Trust III [Member] ESS Statutory Trust II [Member] ESS Statutory Trust II [Member] Trust II [Member] ESS Statutory Trust I [Member] ESS Statutory Trust I [Member] Trust I [Member] Estimate of Fair Value Measurement [Member] Fair Value [Member] The entire disclosure for information about the entity's exchangeable senior notes, including amounts of borrowings and about the underlying arrangements, including repayment terms, interest rates, collateral provided, and other matters important to the users of the financial statements. Exchangeable Senior Notes Disclosure [Text Block] Exchangeable Senior Notes Exchangeable Senior Notes Two Point Three Seven Five Percent [Member] Exchangeable Senior Notes Two Point Three Seven Five Percent [Member] 2.375% Exchangeable Senior Notes [Member] Extra Space Of Sacramento One LLC [Member] Extra Space Of Sacramento One Llc [Member] Extra Space of Sacramento One LLC [Member] Extra Space Storage LP [Member] Extra Space Storage Lp [Member] Operating Partnership [Member] 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] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Assets, Level 1 to Level 2 Transfers, Amount Transfer of assets between level 1 and level 2 Fair Value, Assets, Level 2 to Level 1 Transfers, Amount Transfer of assets between level 2 and level 1 Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value of Financial Instruments [Line Items] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table Text Block] Schedule of Fair Value of Financial Instruments Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Measurement Basis [Axis] Measurement Basis [Axis] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Fair Value Disclosures Fair Value, Inputs, Level 2 [Member] Significant Other Observable Inputs (Level 2) [Member] Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount Transfer of liabilities between level 1 and level 2 Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount Transfer of liabilities between level 2 and level 1 Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Measurements, Recurring [Member] Recurring Basis [Member] Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value Disclosures GEORGIA Georgia [Member] Gain (Loss) on Sale of Properties Gain (loss) on sale of property Gain (loss) on sale of real estate assets and purchase of joint venture partners interests. Gain (Loss) on Sale of Real Estate Assets and Purchase of Joint Venture Partners Interests Gain on sale of real estate assets and purchase of joint venture partners' interests The gain (loss) included in earnings resulting from the sale of real estate assets and the purchase of joint venture partners' interests. Gain Loss On Sale Of Real Estate Assets And Purchase Of Partners Interests Equity in earnings of unconsolidated real estate ventures - gain on sale of real assets and purchase of partners' interests Equity in earnings of unconsolidated real estate ventures-gain on sale of real estate assets and purchase of joint venture partners' interests General and Administrative Expense General and administrative Georgia One Property April Three Two Thousand And Fourteen[Member] Georgia One Property April Three Two Thousand And Fourteen [Member] Georgia, 1 Property Acquired 4/3/2014 [Member] Holders Of Series A Preferred Operating Partnership Units [Member] Holders Of Series A Preferred Operating Partnership Units [Member] Operating Partnership Holders of A Units [Member] Impact of Cash Flow Classification Error [Abstract] Impact of Cash Flow Classification Error [Abstract] Impact of Cash Flow Classification Error [Abstract] Represents the component of income or loss attributable to the noncontrolling interest as a result of fixed distributions paid to Preferred Operating unit holders. Income (Loss) Attributable to Noncontrolling Interest Fixed Component Fixed component of income allocated to noncontrolling interest-Preferred Operating Partnership (Series A Units) Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income before equity in earnings of unconsolidated real estate ventures and income tax expense Income (Loss) from Equity Method Investments Equity in earnings of unconsolidated real estate ventures Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Distributions from unconsolidated real estate ventures in excess of earnings Income Statement [Abstract] Income Statement [Abstract] Income Taxes Paid Income taxes paid Income Tax Expense (Benefit) Income tax expense Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Increase (Decrease) in Due from Related Parties, Current Receivables from related parties and affiliated real estate joint ventures Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Other Operating Liabilities Other liabilities Increase (Decrease) in Restricted Cash Change in restricted cash Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Shares related to the Notes were included in the computation for diluted earnings per share Shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible operating partnership units. Incremental Common Shares Attributable To Conversion Of Operating Partnership Units OP Units Shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of exchangeable preferred operating partnership units. Incremental Common Shares Attributable to Exchangeable Preferred Operating Partnership Units Anti-dilutive securities excluded from computation of earnings per common share Series A Units Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements related to restricted stock awards. Incremental Common Shares Attributable To Share Based Payment Arrangements Restricted Stock Awards Unvested restricted stock awards included for treasury stock method 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. Incremental Common Shares Attributable To Share Based Payment Arrangements Stock Options Shares related to exchangeable senior notes and dilutive stock options Interest Expense Interest expense Interest Expense, Debt Total interest expense recognized Interest Expense, Debt, Excluding Amortization Contractual interest Represents the interest income received by the entity related to a note receivable from the holders of preferred operating partnership units. Interest Income On Note Receivable From Preferred Partnership Unit Holders Interest income on note receivable from Preferred Operating Partnership unit holder Interest Paid, Net Interest paid Interest Rate Cash Flow Hedge Asset at Fair Value Other assets - Asset (Liability) Derivatives Other assets-Cash Flow Hedge Swap Agreements Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net Swap agreements gain (loss) reclassified from OCI - Interest expense Represents the increase (decrease) recognized in interest expenses due to interest payments under cash flow hedge swap agreements. Interest Rate Cash Flow Hedge Increase (Decrease) In Interest Expenses Due To Interest Payments Swap agreements increase (decrease) in interest expenses due to interest payments Interest Rate Cash Flow Hedge Liability at Fair Value Other liabilities-Cash Flow Hedge Swap Agreements Other liabilities - Asset (Liability) Derivatives Interest Rate Swap [Member] Interest Rate Swap [Member] Investment Income, Interest Interest income Represents the carrying value of investments made by the entity in trusts. Investments In Trusts Investment Balance Represents the ownership interest percentage acquired by the entity from a joint venture partner in an existing joint venture. Joint Venture Partner Ownership Interest Acquired Ownership interest acquired in joint venture (as a percent) Represents the ownership interest in five properties through joint ventures prior to the acquisition of the remaining ownership interests in the joint venture. Joint Venture Partner Ownership Interest In Five Properties Prior To Acquisition Ownership interest in five stores through joint ventures prior to the acquisition Represents the ownership interest in one property through a joint venture prior to the acquisition of the remaining ownership interests in the joint venture. Joint Venture Partner Ownership Interest In One Property Prior To Acquisition Ownership interest in one store through joint ventures prior to the acquisition Legal Entity [Axis] Legal Entity [Axis] Liabilities Total liabilities Liabilities and Equity Total liabilities, noncontrolling interests and equity Liabilities and Equity [Abstract] Liabilities, Noncontrolling Interests and Equity: Long-term Line of Credit Lines of credit Long-term Debt Net carrying amount of liability component Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Management fees revenue and other income. Management Fees Revenue and Other Income Management fees and other income Maximum [Member] Maximum [Member] Mergers, Acquisitions and Dispositions Disclosures [Text Block] Store Acquisitions Minimum [Member] Minimum [Member] Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Distributions to Operating Partnership units held by noncontrolling interests Noncontrolling Interest Disclosure [Text Block] Noncontrolling Interests 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. Minority Interest In Net Income Loss Operating Partnerships And Other Net income allocated to Operating Partnership and other noncontrolling interests Noncontrolling Interest in Operating Partnerships Noncontrolling interests in Operating Partnership Noncontrolling Interest in Preferred Unit Holders Noncontrolling interest represented by Preferred Operating Partnership units, net of $120,230 notes receivable Noncontrolling Interest [Line Items] Noncontrolling Interest in Operating Partnership [Line Items] Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Noncontrolling interest in operating partnership (as a percent) Ownership interests of third party owners Noncontrolling Interest, Ownership Percentage by Parent Ownership interest held by entity (as a percent) Noncontrolling Interest [Table] Noncontrolling Interest [Table] Nature of Operations [Text Block] Organization NORTH CAROLINA North Carolina [Member] Net Cash Provided by (Used in) Continuing Operations Net decrease in cash and cash equivalents Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Cash flows from operating activities: Net Income (Loss) Attributable to Parent Net income attributable to common stockholders Net income attributable to common stockholders Net income (loss) attributable to noncontrolling interest in operating partnership. Net Income (Loss) Attributable to Noncontrolling Interest In Operating Partnership Income allocated to noncontrolling interest-Preferred Operating Partnership (Series A Units) and Operating Partnership Net Income (Loss) Available to Common Stockholders, Basic Earnings for basic computations Net Income (Loss) Available to Common Stockholders, Diluted Net income for diluted computations New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Standards Noncash or Part Noncash Acquisition, Debt Assumed Debt assumed Represents the amount of real estate assets that an Entity acquires in a noncash (or part noncash) acquisition. Real estate assets refer to the lands, buildings and intangible assets (including those that are part of operations and those under development) of a real estate entity, net of accumulated depreciation and amortization. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Noncash Or Part Noncash Acquisition Net Real Estate Assets Acquired Real estate assets, net Noncash Or Part Noncash Acquisition Net Real Estate Assets Acquired [Abstract] Noncash Or Part Noncash Acquisition Net Real Estate Assets Acquired [Abstract] Acquisitions of real estate assets Noncontrolling Interest [Abstract] Noncontrolling Interests [Abstract] Represents the maximum number of preferred operating partnership units that can be converted by noncontrolling holders of preferred units before maturity date of the loan. Noncontrolling Interest Conversion Of Preferred Operating Partnership Units Before Maturity Of Loan Maximum Maximum number of preferred OP units converted prior to the maturity date of the loan (in shares) Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable Net income allocated to Preferred Operating Partnership noncontrolling interests Represents the annual rate of return of preferred operating partnership units. Noncontrolling Interest In Preferred Operating Partnership Units Annual Rate Of Return Annual rate of return (as a percent) Represents the ratio for conversion of preferred operating partnership units into common OP units. Noncontrolling Interest In Preferred Operating Partnership Units Conversion Ratio Preferred OP units conversion ratio Non-controlling interest in preferred operating partnership units current redemption value. Noncontrolling Interest In Preferred Operating Partnership Units Current Redemption Value Preferred OP units, current liquidation value Represents the fixed liquidation value of preferred operating partnership units. Noncontrolling Interest In Preferred Operating Partnership Units Fixed Liquidation Value Fixed liquidation value Represents the carrying amount of preferred operating partnership units attributable to noncontrolling preferred unit holders on which the fixed priority return is granted. Noncontrolling Interest In Preferred Operating Partnership Units Fixed Priority Return Amount Fixed priority return on preferred OP units, amount Represents the liquidation value of preferred operating partnership units attributable to noncontrolling preferred unit holders on which the fixed priority return is granted. Noncontrolling Interest In Preferred Operating Partnership Units Fixed Priority Return Redemption Value Fixed priority return on preferred OP units, liquidation value Represents the fixed priority return, as a percent, of preferred operating partnership units attributable to noncontrolling preferred unit holders on which the fixed priority return is granted. Noncontrolling Interest In Preferred Operating Partnership Units Fixed Priority Return Stated Rate Of Return Fixed priority return on preferred OP units, stated return rate (as a percent) Represents the liquidation value per unit of preferred operating partnership units. Noncontrolling Interest In Preferred Operating Partnership Units Liquidation Value Per Unit Liquidation value (in dollars per share) The number of periods immediately preceding the fifth anniversary of issuance of the preferred units which are averaged to determine the amount of quarterly distributions to be paid after the fifth anniversary of issuance. Noncontrolling Interest In Preferred Operating Partnership Units Number Of Periods Immediately Preceding Fifth Anniversary Of Issuance Averaged For Future Distributions Number of quarters immediately preceding the fifth anniversary of issuance for which distribution is payable Represents the value of preferred operating partnership units outstanding. Noncontrolling Interest in Preferred Operating Partnership Units Outstanding Value Units outstanding Represents the period from the date of issuance after which preferred units will become convertible into common OP units at the option of the holder. Noncontrolling Interest In Preferred Operating Partnership Units Period From Date Of Issuance After Which Units Become Convertible Period from date of issuance after which preferred OP units will become convertible into common OP units at the option of the holder Represents the period from the date of issuance after which preferred units will become redeemable at the option of the holder. Noncontrolling Interest In Preferred Operating Partnership Units Period From Date Of Issuance After Which Units Become Redeemable Period from date of issuance after which preferred OP units will become redeemable at the option of the holder Represents the quarterly distribution per preferred OP unit payable above quarterly distribution for common OP Unit. Noncontrolling Interest In Preferred Operating Partnership Units Quarterly Distribution Per Unit Payable Above Quarterly Distribution For Common Operating Partnership Unit Quarterly distribution per preferred OP unit payable above quarterly distribution for common OP Unit Non Controlling Interest Other [Member] Non Controlling Interest Other [Member] Other [Member] North Carolina South Carolina Two Property March Thirty Two Thousand And Fifteen [Member] North Carolina South Carolina Two Property March Thirty Two Thousand And Fifteen [Member] North Carolina South Carolina 2 Property 3/30/2015 [Member] Notes Payable Fixed rate notes payable and notes payable to trusts Notes Payable, Fair Value Disclosure Fixed rate notes payable and notes payable to trusts Notes payable to trusts. Notes Payable To Trusts Notes payable to Trusts Represents the date on which the note receivable is scheduled to be fully repaid. Notes Receivable Maturity Date Note receivable maturity date Represents the stated interest rate of notes receivable. Notes Receivable Stated Interest Rate Note receivable interest rate (as a percent) Represents the number of common Operating Partnership units issued by the entity as part of an acquisition. Number Of Common Units Issued As Part Of Acquisition Number of common units issued as part of acquisition Number of preferred operating partnership units. Number of Preferred Operating Partnership Units Number of Units Represents the number of properties owned by the joint venture. Number Of Properties Owned By Joint Venture Number of operating stores owned by consolidated joint venture Number of properties sold by joint venture. Number of Properties Sold by Joint Venture Number of operating stores sold by consolidated joint venture Number of Real Estate Properties Number of operating storage facilities in which the entity has equity interests (in stores) Represents the number of real estate properties acquired. Number Of Real Estate Properties Acquired Number of Stores The number of real estate properties owned by franchisees and other third parties as of the balance sheet date. Number Of Real Estate Properties Franchisees And Others Number of stores owned by franchisees and third parties The number of real estate properties owned and/or managed as of the balance sheet date. Number Of Real Estate Properties Owned And Or Managed Number of operating stores owned and/or managed Number of Reportable Segments Number of reportable segments Represents the number of self-storage facilities acquired. Number Of Self Storage Facilities Acquired Number of self storage facilities acquired Number of stores acquired Represents the number of self-storage properties acquired by the entity as part of a portfolio acquisition. Number Of Self Storage Properties Acquired In Portfolio Number of self-storage facilities (stores) acquired Number of stores acquired as part of portfolio acquisition Represents the number of self-storage properties in which ownership interest was held prior to the acquisition. Number Of Self Storage Properties In Which Ownership Interest Was Held Prior To Acquisition Number of stores in which ownership interest was held prior to acquisition Represents the number of self-storage properties in which ownership interest was held through joint ventures prior to the acquisition of the remaining properties. Number Of Self Storage Properties In Which Ownership Interest Was Held Prior To Acquisition Of Remaining Properties Number of stores in which ownership interest was held prior to acquisition of remaining properties Number Of Self Storage Properties In Which Ownership Interest Was Held Through Joint Ventures Number Of Self Storage Properties In Which Ownership Interest Was Held Through Joint Ventures Number of stores acquired Number of States in which Entity Operates Number of states in which operating storage facilities are located Number of Stores Number of stores to be acquired Number of stores scheduled to be closed. Number of Stores Scheduled to be Closed Number of stores scheduled to be closed NEW YORK NEW YORK Operating Income (Loss) Income (loss) from operations Income from operations Operating Leases, Income Statement, Minimum Lease Revenue Property rental Represents the amount the entity would have paid in cash to redeem the operating partnership units. Operating Partnership Units Redemption Amount Consideration to be paid on redemption of common OP units Represents the number of operating partnership units redeemed during the period. Operating Partnership Units Redemption Number Common stock shares redeemed Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization Consolidation And Presentation Of Financial Statements [Line Items] Organization Consolidation And Presentation Of Financial Statements [Line Items] Organization Consolidation And Presentation Of Financial Statements [Line Items] Organization Consolidation And Presentation Of Financial Statements [Table] Organization Consolidation And Presentation Of Financial Statements [Table] Organization Consolidation And Presentation Of Financial Statements [Table] Other Assets Other assets, net Other Assets [Member] Other Assets [Member] Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Change in fair value of interest rate swaps Other Comprehensive Income (Loss), Net of Tax Other comprehensive income Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive loss: Other Liabilities Other liabilities Other Liabilities [Member] Other Liabilities [Member] Other Noncontrolling Interests Other noncontrolling interests Partners capital account additional units redeemed. Partners Capital Account Additional Units Redeemed Additional units redeemed Partners' Capital Account, Units, Redeemed A units redeemed Partner Type [Axis] Partner Type [Axis] Partner Type of Partners' Capital Account, Name [Domain] Partner Type of Partners' Capital Account, Name [Domain] Payments of Ordinary Dividends, Common Stock Dividends paid on common stock Payments of Ordinary Dividends, Noncontrolling Interest Distributions to noncontrolling interests Payments of Financing Costs Deferred financing costs Payments to Acquire Businesses, Gross Cash Consideration Paid Payments to Acquire Furniture and Fixtures Purchase of equipment and fixtures Payments to Acquire Real Estate Acquisition of real estate assets Payments to Acquire Real Estate and Real Estate Joint Ventures Cash paid for acquiring equity interest in the joint venture Payments to Develop Real Estate Assets Development and redevelopment of real estate assets Percentage Gain On Sale Of Property By Joint Venture Percentage Gain On Sale Of Property By Joint Venture Percentage of gain from sale of property Represents the minimum amount of convertible preferred operating partnership units which will be settled in cash upon conversion. Preferred Operating Partnership Units Amount to be Settled in Cash Minimum Exchangeable preferred operating partnership units settled in cash, minimum Preferred Operating Partnership Units [Member] Preferred Operating Partnership Units [Member] Preferred Operating Partnership Units [Member] Preferred Stock, Par or Stated Value Per Share Preferred stock, par value Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Preferred Stock, Value, Issued Preferred stock, $0.01 par value, 50,000,000 shares authorized, no shares issued or outstanding Preferred Units by Name [Axis] Preferred Units by Name [Axis] Preferred Units, Class [Domain] Preferred Units, Class [Domain] The number of preferred units issued as part of an acquisition. Preferred Units Issued as Part of Acquisition Preferred Units Issued as Part of Acquisition (in shares) Preferred OP units issued as part of the acquisition (in shares) Preferred units issued as part of acquisition Represents the value of preferred units issued as part of an acquisition. Preferred Units Issued as Part of Acquisition Amount Preferred OP units issued as part of the acquisition Total consideration paid Reclassification, Policy [Policy Text Block] Reclassifications Proceeds and Excess Tax Benefit from Share-based Compensation Other assets The cash inflow from a borrowing supported by a written promise and contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). Proceeds From Notes Payable And Lines Of Credit Proceeds from notes payable and lines of credit Proceeds from Sale of Property, Plant, and Equipment Proceeds from sale of property Proceeds from Stock Options Exercised Net proceeds from exercise of stock options Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Net income (loss) Property Acquisition And Dispositions [Table] Property Acquisition And Dispositions [Table] Property Acquisition And Dispositions [Table] Property Management Acquisition And Development [Member] Property Management Acquisition And Development [Member] Property Management Acquisition and Development [Member] Property Plant and Equipment Useful Life and Values [Abstract] Property Plant and Equipment Useful Life and Values [Abstract] Property Plant and Equipment Useful Life and Values [Abstract] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Represents the number of consolidated joint ventures as of the balance sheet date. Real Estate Consolidated Join Ventures Number Number of consolidated joint ventures Real Estate Investment Property, Net Real estate assets, net Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures Investment in unconsolidated real estate ventures Investments in unconsolidated real estate ventures Real Estate Properties Acquisition [Line Items] Real Estate Properties Acquisition [Line Items] Property Acquisitions [Line Items] Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Real Estate Properties [Domain] Real Estate Properties [Domain] The net value of assets transferred (liabilities assumed) in connection with the acquisition of real estate operating property. Real Estate Property Acquisition Assets Acquired Liabilities Assumed, Net Net Liabilities/(Assets) Assumed Represents closing costs expensed related to real estate property acquired. Real Estate Property Acquisition Closing Costs Expensed Closing costs-expensed Represents the value of the notes receivable that was eliminated due to the acquisition of the joint venture partner interest. Real Estate Property Acquisition Notes Receivable Eliminated Due To Acquisition Of Joint Venture Partner Interest Company held mortgage notes receivable eliminated as a result of the acquisition Notes Receivable Represents the book value of the equity interest held by the entity immediately prior to the acquisition date. Real Estate Property Acquisition Previous Equity Interest Previous equity interest The amount of acquisition cost of a real estate property allocated to building. Real Estate Property Acquisition Purchase Price Allocation Building Acquisition Date Fair Value, Building The amount of acquisition cost of a real estate property allocated to land. Real Estate Property Acquisition Purchase Price Allocation Land Acquisition Date Fair Value, Land Real Estate Revenue, Net Total revenues Total revenues Represents the value of the notes receivable that was eliminated due to the acquisition of the joint venture partner interest. Receivable Eliminated Due To Acquisition Of Joint Venture Partner Interest Receivables from related parties and affiliated real estate joint ventures Represents the percentage of principal amount used in computation of the redemption price to be paid on conversion of convertible notes at the request of the debt holders and upon the occurrence of a designated event. Redemption Price Of Debt As Percentage Of Principal Amount At Request Of Debt Holders Redemption price as percentage of principal amount of notes at request of debt holders and upon occurrence of designated event Rental Operations [Member] Rental Operations [Member] Rental Operations [Member] Rental Revenue [Member] Rental Revenue [Member] Rental Revenue [Member] Repayments of Debt Principal payments on notes payable and lines of credit Restricted Cash and Cash Equivalents Restricted cash Retained Earnings (Accumulated Deficit) Accumulated deficit Retained Earnings [Member] Accumulated Deficit [Member] Revenues [Abstract] Revenues: Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of Antidilutive Shares Excluded from Computation of Earnings Per Share Schedule of Business Acquisitions, by Acquisition [Table Text Block] Schedule of Operating Properties Acquired Derivative Instruments, Gain (Loss) [Table Text Block] Schedule of Information Relating to Gain (Loss) Recognized on Swap Agreements Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Balance Sheet Classification and Fair Value of Entity's Derivative Financial Instruments Tabular disclosure of impact of interest payments on interest expenses recognized under cash flow hedge swap agreements. Schedule Of Derivative Instruments Interest Payments Impact On Interest Expenses [Table Text Block] Interest Payments Recognized as an Increase or Decrease in Interest Expense Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Computation of Earnings Per Common Share Investment, Name [Axis] Investment, Name [Axis] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis Tabular disclosure of interest cost recognized and the amortization of the discount on the liability component of the convertible debt instrument. Schedule Of Interest And Amortization Discount Cost [Table Text Block] Summary of Amount of Interest Cost Recognized Relating to Contractual Interest Rate and Amortization of Discount on Liability Component of Notes Schedule Of Results Related To Equity Accounted Investees [Line Items] Schedule Of Results Related To Equity Accounted Investees [Line Items] Schedule Of Results Related To Equity Accounted Investees [Line Items] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Financial Information of Business Segments Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Secured Debt Notes payable Segments [Domain] Segments [Domain] Geographical [Domain] Geographical [Domain] Segment Reporting [Abstract] Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Segment Information Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Self Storage Facility [Member] Self Storage Facility [Member] Self Storage Facility in Florida [Member] Series A Participating Redeemable Preferred Units [Member]. Series A Participating Redeemable Preferred Units [Member] Series A Participating Redeemable Preferred Units [Member] Series A Preferred Operating Partnership [Member] Series A Preferred Operating Partnership [Member] Series A Preferred Operating Partnership [Member] Series A Units [Member] Series A Units [Member] Series A Units [Member] Series B Preferred Operating Partnership [Member] Series B Preferred Operating Partnership [Member] Series B Preferred Operating Partnership [Member] Series B Redeemable Preferred Units [Member] Series B Redeemable Preferred Units [Member] Series B Redeemable Preferred Units [Member] Series B Units [Member] Series B Units [Member] Series B Units [Member] Series C Convertible Redeemable Preferred Units [Member]. Series C Convertible Redeemable Preferred Units [Member] Series C Convertible Redeemable Preferred Units [Member] Series C Preferred Operating Partnership [Member] Series C Preferred Operating Partnership [Member] Series C Preferred Operating Partnership [Member] Series C Units [Member] Series C Units [Member] Series C Units [Member] Series D Preferred Operating Partnership [Member] Series D Preferred Operating Partnership [Member] Series D Preferred Operating Partnership [Member] Series D Redeemable Preferred Units [Member] Series D Redeemable Preferred Units [Member] Series D Redeemable Preferred Units [Member] Series D Units [Member] Series D Units [Member] Series D Units [Member] Share-based Compensation Compensation expense related to stock-based awards Equity Award [Domain] Equity Award [Domain] Share Price Average closing price of common stock Segments [Axis] Segments [Axis] Class of Stock [Axis] Class of Stock [Axis] Equity Components [Axis] Equity Components [Axis] Geographical [Axis] Geographical [Axis] Statement [Line Items] Statement [Line Items] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Statement of Stockholders' Equity [Abstract] Condensed Consolidated Statement of Noncontrolling Interests and Equity [Abstract] Statement [Table] Statement [Table] Stockholders' Equity Attributable to Parent Total Extra Space Storage Inc. stockholders' equity Stockholders' Equity Attributable to Parent [Abstract] Extra Space Storage Inc. stockholders' equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balances Balances Total noncontrolling interests and equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Noncontrolling Interests and Equity: Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Restricted stock grants cancelled (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Restricted stock grants issued (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Issuance of common stock upon the exercise of options (in shares) Stock Issued During Period, Value, Restricted Stock Award, Gross Restricted stock grants issued Stock Issued During Period, Value, Stock Options Exercised Issuance of common stock upon the exercise of options Subsequent Event [Line Items] Subsequent Event [Line Items] Subsequent Event [Member] Subsequent Event [Member] Subsequent Events [Abstract] Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent Events Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Supplemental Cash Flow Information [Abstract] Supplemental schedule of cash flow information The expense in the period incurred with respect to the entity's tenant reinsurance program. Tenant Reinsurance Expense Tenant reinsurance Tenant Reinsurance [Member] Tenant Reinsurance [Member] Tenant Reinsurance [Member] Texas One Property February Twenty Four Two Thousand And Fifteen [Member] Texas One Property February Twenty Four Two Thousand And Fifteen [Member] Texas 1 Property 2/24/2015 [Member] Texas Three Property January Thirteen Two Thousand And Fifteen [Member] Texas Three Property January Thirteen Two Thousand And Fifteen [Member] Texas 3 Property January 13, 2015 [Member] Text Block [Abstract] Text Block [Abstract] Trading Symbol Trading Symbol TEXAS Texas [Member] Undistributed Earnings, Basic Earnings and dividends allocated to participating securities Undistributed Earnings, Diluted Earnings and dividends allocated to participating securities Units of Partnership Interest, Amount OP units outstanding Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) Swap agreements gain (loss) recognized in OCI Variable Interest Entity, Nonconsolidated, Comparison of Carrying Amount of Assets and Liabilities to Maximum Loss Exposure Difference Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity Disclosure [Text Block] Variable Interests Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Maximum exposure to loss Variable Interest Entity Interest In Consolidated Joint Ventures Number Variable Interest Entity Interest In Consolidated Joint Ventures Number Number of interests in consolidated VIE joint ventures Represents the number of wholly-owned unconsolidated subsidiaries. Variable Interest Entity Interest In Trust Number Number of wholly-owned unconsolidated subsidiaries Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] A tabular disclosure of the carrying amounts of liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the subsidiaries of the operating partnership and the reporting entity's maximum exposure to loss as a result of its involvement with the VIE. Variable Interest Entity Not Primary Beneficiary Comparison Of Carrying Amount Of Liabilities To Maximum Loss Exposure [Table Text Block] Schedule of Liabilities and Maximum Exposure to Loss Related to Trusts Variable Interest Entity, Not Primary Beneficiary [Member] Variable Interest Entity, Not Primary Beneficiary [Member] Variable Interests And Equity Method Investments Disclosure [Abstract] Variable Interests And Equity Method Investments Disclosure [Abstract] Variable Interests And Equity Method Investments Disclosure [Abstract] Virginia One Property March Seventeen Two Thousand And Fifteen [Member] Virginia One Property March Seventeen Two Thousand And Fifteen [Member] Virginia 1 Property 3/17/2015 [Member] Weighted Average Number of Shares Outstanding, Diluted Diluted Average number of common shares outstanding-diluted Weighted Average Number of Shares Outstanding, Basic Average number of common shares outstanding-basic Basic Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Weighted average common shares outstanding: Weighted average number of shares Represents the number of days of written notice to be made to the holders of the notes required for redemption. Written Notice Required For Redemption Period Number of days of written notice to holders of notes required for redemption