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Modular Space Holdings Inc. [Member] Modular Space Holdings Inc. Pre-tax income since acquisition date Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Business Combination and Asset Acquisition [Abstract] Granted (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Fee on unused borrowings Line of Credit Facility, Commitment Fee Percentage Business Acquisition [Axis] Business Acquisition [Axis] TSR, target Share-based Compensation Arrangement by Share-based Payment Award, Total Shareholder Return Threshold Percentage, Target Share-based Compensation Arrangement by Share-based Payment Award, Total Shareholder Return Threshold Percentage, Target Accrued interest Increase (Decrease) in Interest Payable, Net Schedule of Indefinite-Lived Intangible Assets Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Adjusted EBITDA AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization Equity Award [Domain] Award Type [Domain] Credit Facility [Domain] Credit Facility [Domain] Assets Assets [Abstract] Related Party Transactions [Abstract] Vested and exercisable stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Assets obtained in exchange for finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Pro forma net income Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax Concentration risk percentage Concentration Risk, Percentage Preferred Stock: $0.0001 par, 1,000,000 shares authorized and zero shares issued and outstanding at September 30, 2021 and December 31, 2020 Preferred Stock, Value, Issued Beginning balance (in shares) Ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Entity Address, City or Town Entity Address, City or Town Currency [Axis] Currency [Axis] Accumulated Deficit Retained Earnings [Member] Debt Instrument [Axis] Debt Instrument [Axis] Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Sapphire Holding S.a. r.l. Sapphire Holding S.a. r.l. [Member] Sapphire Holding S.a. r.l. 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Mobile Mini, Inc. [Member] Mobile Mini, Inc. 2017 ABL Facility - US Facility US Asset Based Liability Facility Due 2020 [Member] US Asset Based Liability Facility Due 2020 [Member] Earnings (Loss) Per Share Earnings Per Share [Text Block] Accrued expenses Derivative Liability, Current Impairment losses on right of use assets Operating Lease, Impairment Loss Expenses: Operating Expenses [Abstract] 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Four Minimum Minimum [Member] Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] Performance-Based Restricted Stock Units Performance-based RSUs Performance-Based Restricted Stock Units (RSUs) [Member] Performance-Based Restricted Stock Units (RSUs) Reclassification of ModSpace Warrants Adjustments To Additional Paid In Capital, Reclassification Of Warrants Adjustments To Additional Paid In Capital, Reclassification Of Warrants Currency losses (gains), net OperatingCurrencyGainsLossesbeforeTax Affiliates Affiliated Entity [Member] Total identifiable assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets and Goodwill Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets and Goodwill Gross profit Gross Profit 2023 Lessee, Operating Lease, Liability, to be Paid, Year Two Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Lease impairment expense and other related charges Operating Lease, Impairment Loss and Other Operating Lease, Impairment Loss and Other Balance Sheet Location [Domain] Balance Sheet Location [Domain] Portable storage leasing revenue Portable Storage Leasing [Member] Portable Storage Leasing Equipe Container Services, Inc., Saf-T-Box, LP and American Mobile Leasing, LLC Equipe Container Services, Inc., Saf-T-Box, LP and American Mobile Leasing, LLC [Member] Equipe Container Services, Inc., 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currency translation and other Accounts Receivable, Allowance for Credit Loss, Foreign Currency Translation and Other Accounts Receivable, Allowance for Credit Loss, Foreign Currency Translation and Other Senior Notes Notes Senior Notes [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Inventories Inventory Disclosure [Text Block] Cash paid for the amounts included in the measurement of lease liabilities: Cash Flow, Lessee [Abstract] Cash Flow, Lessee [Abstract] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Accounting Policies [Abstract] Derivative Instrument [Axis] Derivative Instrument [Axis] Issuance of stock (in shares) Stock Issued During Period, Shares, New Issues Payment of Common Stock issuance costs Payments of Stock Issuance Costs Number of reportable segments Number of Reportable Segments Other non-current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Letters of credit amount outstanding Letters of Credit Outstanding, Amount Present value of lease liabilities Operating Lease, Liability Transaction costs Transaction Fees Transaction Fees Unrealized currency losses, net Foreign Currency Transaction Gain (Loss), before Tax Common Stock: $0.0001 par, 500,000,000 shares authorized and 223,665,627 and 229,038,158 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively Common Stock, Value, Issued Weighted-average discount rate - finance leases Finance Lease, Weighted Average Discount Rate, Percent Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Equity Interest Issued or Issuable, Type [Domain] Equity Interest Issued or Issuable, Type [Domain] Unrecognized compensation expense, period for recognition Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Number of units in real estate property acquired Number of Units in Real Estate Property Beginning balance (in USD per share) Ending balance (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Acquisition of Mobile Mini Goodwill, Acquired During Period Basis of Presentation Basis of Accounting, Policy [Policy Text Block] 2020 ABL Facility - US Facility Asset Based Liability Facility Due 2025 - US Facility [Member] Asset Based Liability Facility Due 2025 - US Facility Commitments and contingencies (see Note 17) Commitments and Contingencies Total long-term assets Assets, Noncurrent Leases Lessee, Operating Leases [Text Block] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Carrying Amounts and Fair Values of Financial Assets and Liabilities Fair Value, by Balance Sheet Grouping [Table Text Block] Amortization of finance lease assets Finance Lease, 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Risk [Member] Debt drawn Proceeds from Issuance of Debt Net gain (loss) on derivatives, net of income tax expense (benefit) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Receipts from issuance of Common Stock from the exercise of options (in shares) Stock Issued During Period, Shares, Warrants Exercised Stock Issued During Period, Shares, Warrants Exercised Document Period End Date Document Period End Date 2022 Secured Notes SeniorSecuredNotesDueDecember2022Member Awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Goodwill [Line Items] Goodwill [Line Items] Interest expense Interest Expense Adjustment [Member] Interest Expense Adjustment Other comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Class of Stock [Axis] Class of Stock 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of Half Warrants or Rights Subsequent Event Subsequent Event [Member] Cover [Abstract] Purchases of rental equipment and refurbishments Property, Plant and Equipment, Capital Expenditures, Assets Leased to Others Property, Plant and Equipment, Capital Expenditures, Assets Leased to Others Net book value Finite-Lived Intangible Assets, Net Goodwill Goodwill identified Goodwill, beginning of period Goodwill, end of period Goodwill Extinguishment of debt, amount Extinguishment of Debt, Amount Loss reclassified from AOCI into income (effective portion) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 2015 Public Warrants Public Warrants [Member] Public Warrants [Member] Warrants to purchase Common Stock Warrants to purchase Common Stock [Member] Warrants to purchase Common Stock Depreciation and amortization Depreciation, Amortization and Accretion, Net Volatility Measurement Input, Price Volatility [Member] Quantitative Information Regarding Level 3 Fair Value Measurements Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Cost of leasing and services Cost of Sales [Member] Warrant valuation input Warrants and Rights Outstanding, Measurement Input Write-off of unamortized deferred financing fees Write off of Deferred Debt Issuance Cost United States of America, Dollars United States of America, Dollars Schedule of Goodwill Activity Schedule of Goodwill [Table Text Block] 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] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Schedule of Fair Value of Derivative Instruments Designated as Hedges in the Consolidated Balance Sheet Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Fixed lease expense Operating Lease, Cost Related Parties Related Party Transactions Disclosure [Text Block] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Total related party expense, net RelatedPartyTransactionIncomeExpensesfromTransactionswithRelatedPartyNet Reserves for uncertain tax positions Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Storage Unit Storage Unit [Member] Storage Unit [Member] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Accounts payable and other accrued expenses IncreaseDecreaseInAccountsPayableAndOtherAccruedLiabilities Schedule of Related Party Transaction, Income (Expenses) from Related Party Schedule of Related Party Transaction, Income (Expenses) from Related Party [Table Text Block] Schedule of Related Party Transaction, Income (Expenses) from Related Party Modular space units Modular Space Units [Member] Modular Space Units [Member]