Acquisitions - Additional Information (Detail) $ in Thousands					3 Months Ended	9 Months Ended		12 Months Ended
	Jul. 01, 2023 USD ($) MobileModularPortableStorage	Apr. 01, 2023 USD ($) MobileModularPortableStorage	Mar. 01, 2023 USD ($) MobileModularPortableStorage	Feb. 01, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Business Acquisition [Line Items]
Reduction in accounts payable and accrued liabilities						$ 32,818	$ 14,384
Reduction in deferred income taxes						30,018	$ 4,299
Combined acquired goodwill					$ 323,771	$ 323,771		$ 106,403
Goodwill deductible for tax purpose, period						15 years
Intangible assets					67,480	$ 67,480		$ 35,431
Combined federal and state tax rate						26.50%
Trade Name [Member]
Business Acquisition [Line Items]
Acquired intangible assets, expected useful life								8 years
Non-compete Agreements [Member]
Business Acquisition [Line Items]
Acquired intangible assets, expected useful life						5 years		5 years
Vesta Modular [Member]
Business Acquisition [Line Items]
Purchase of assets				$ 437,200
Reduction in rental assets					12,800
Reduction in Goodwill					1,600
Reduction in accounts payable and accrued liabilities					400
Increase in customer relationships intangible asset					3,900
Reduction in deferred income taxes					10,100
Business acquisition, transaction costs				9,500
Purchase price				437,210
Combined acquired goodwill				$ 211,730
Vesta Modular [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets, expected useful life				11 years
Vesta Modular [Member] | Trade Name [Member]
Business Acquisition [Line Items]
Acquired intangible assets, expected useful life						9 months
Brekke Storage [Member]
Business Acquisition [Line Items]
Business acquisition, transaction costs			$ 200
Increased number of mobile modular portable storage | MobileModularPortableStorage			2,700
Purchase price			$ 16,382
Combined acquired goodwill			$ 4,083
Brekke Storage [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets, expected useful life			8 years
Vesta Modular, Brekke Storage and Dixie Storage [Member]
Business Acquisition [Line Items]
Combined acquired goodwill					$ 217,400	$ 217,400
Dixie Storage [Member]
Business Acquisition [Line Items]
Business acquisition, transaction costs		$ 100
Increased number of mobile modular portable storage | MobileModularPortableStorage		800
Purchase price		$ 4,751
Purchase price including acquisition costs		4,900
Combined acquired goodwill		$ 1,555
Dixie Storage [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets, expected useful life		9 years
Inland Leasing [Member]
Business Acquisition [Line Items]
Increased number of mobile modular portable storage | MobileModularPortableStorage	600
Purchase price	$ 3,800
Rental equipment	3,000
Intangible assets	$ 700