Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2024 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) shares	Dec. 31, 2024 USD ($) Segment Division $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) shares	Aug. 31, 2015 shares
Summary Of Significant Accounting Policies [Line Items]
Number of divisions | Division			3
Number of reportable segments | Segment			4
Common stock, par value | $ / shares	$ 0		$ 0	$ 0
Impairments of long-lived assets			$ 0	$ 0	$ 0
Period for warranties for rental equipment			90 days
Period for warranties for equipment manufactured			1 year
Property, plant and equipment depreciation expenses			$ 8,900,000	9,700,000	9,000,000
Capitalized in internal use of software	$ 0		0	200,000
Total advertising expenses			6,200,000	5,900,000	5,000,000
Goodwill and trade name intangible assets	323,400,000		323,400,000	323,400,000
Impairment charges				$ 0	$ 0
Goodwill and intangible assets impairment charge	$ 0		$ 0
Anti-dilutive securities excluded from computation of diluted earnings per share | shares			37,214	0	0
Common stock shares authorized for repurchase | shares						2,000,000
Common stock repurchased | shares			0	0	0
Shares remain authorized for repurchase | shares	2,000,000		2,000,000
Unbilled receivables related to end-of-lease services	$ 69,600,000		$ 69,600,000	$ 59,500,000
Period for credit risk identified			30 days
Accounts receivable, credit loss			$ 1,890,000	2,633,000	$ 837,000
Allowance for credit losses	2,866,000		2,866,000	2,801,000	$ 2,300,000
Net investment in sales-type leases	6,700,000		6,700,000	3,700,000
Credit loss expense			0
Estimated fair value notes payable	169,400,000		169,400,000	169,200,000
Recorded fair value of notes payable	$ 175,000,000		175,000,000	$ 175,000,000
Gain on merger termination, net of transaction costs, presented under net cash provided by operating activities			$ 116,841,000
Repurchase Plan Established in August 2015 [Member]
Summary Of Significant Accounting Policies [Line Items]
Shares remain authorized for repurchase | shares	1,309,805		1,309,805
Merger Agreement [Member] | WillScot Mobile Mini Holdings Corp [Member]
Summary Of Significant Accounting Policies [Line Items]
Mini's cash payment upon termination agreement		$ 180,000,000
Gain on merger termination, net of transaction costs, presented under net cash provided by operating activities			$ 180,000,000
Merger agreement termination costs			63,200,000
Proceeds from business acquisition termination			$ 116,800,000
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Sales-type leases terms	12 months		12 months
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Common stock shares authorized for repurchase | shares		2,000,000
Sales-type leases terms	36 months		36 months