Acquisitions - Summary of Preliminary Purchase Price Allocations Reflecting Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	May 17, 2021	Apr. 01, 2021	Dec. 31, 2020
Intangible assets:
Goodwill	$ 132,393			$ 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		(12,359)
Deferred income		(2,784)
Total purchase price		266,533
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