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Acquisitions - Summary of Preliminary Purchase Price Allocations Reflecting Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands | Sep. 30, 2021 | May 17, 2021 | Apr. 01, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Intangible assets: |  |  |  |
Goodwill | $ 132,387 |  |  | $ 28,197
Design Space Modular Buildings PNW, LP [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Rental equipment |  | $ 116,272 |  |
Intangible assets: |  |  |  |
Goodwill |  | 101,874 |  |
Accounts receivable, net of allowance for doubtful accounts of $125 |  | 12,025 |  |
Property, plant and equipment |  | 4,139 |  |
Prepaid expenses and other assets |  | 5,366 |  |
Accounts payable and accrued liabilities |  | (11,613) |  |
Deferred income |  | (2,784) |  |
Total purchase price |  | 267,279 |  |
Design Space Modular Buildings PNW, LP [Member] | Customer Relationships [Member] |  |  |  |
Intangible assets: |  |  |  |
Intangible assets |  | 37,900 |  |
Design Space Modular Buildings PNW, LP [Member] | Non-compete [Member] |  |  |  |
Intangible assets: |  |  |  |
Intangible assets |  | 2,500 |  |
Design Space Modular Buildings PNW, LP [Member] | Customer Backlog [Member] |  |  |  |
Intangible assets: |  |  |  |
Intangible assets |  | $ 1,600 |  |
GRS Holding LLC, DBA Kitchens To Go [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Rental equipment |  |  | $ 12,853 |
Intangible assets: |  |  |  |
Goodwill |  |  | 2,322 |
Accounts receivable, net of allowance for doubtful accounts of $125 |  |  | 212 |
Property, plant and equipment |  |  | 365 |
Prepaid expenses and other assets |  |  | 1,199 |
Accounts payable and accrued liabilities |  |  | (1,659) |
Deferred income |  |  | (747) |
Total purchase price |  |  | 18,345 |
GRS Holding LLC, DBA Kitchens To Go [Member] | Customer Relationships [Member] |  |  |  |
Intangible assets: |  |  |  |
Intangible assets |  |  | 1,700 |
GRS Holding LLC, DBA Kitchens To Go [Member] | Trade Name |  |  |  |
Intangible assets: |  |  |  |
Intangible assets |  |  | 1,200 |
GRS Holding LLC, DBA Kitchens To Go [Member] | Non-compete [Member] |  |  |  |
Intangible assets: |  |  |  |
Intangible assets |  |  | 600 |
GRS Holding LLC, DBA Kitchens To Go [Member] | Customer Backlog [Member] |  |  |  |
Intangible assets: |  |  |  |
Intangible assets |  |  | $ 300 |

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