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Acquisitions - Pro Forma Information (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jul. 01, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 15, 2020
Business Acquisition [Line Items]
Revenues		$ 461,102	$ 256,862	$ 886,425	$ 512,683
Income (loss) before income tax		$ 39,199	(14,415)	$ 54,127	78,030
State and Federal Income Taxes, Percent		25.50%		25.50%
Elimination of reversal of valuation allowance due to reassessment			2,700		2,700
2025 Secured Notes | Senior Notes
Business Acquisition [Line Items]
Interest rate	6.125%	6.125%		6.125%		6.125%
Revolving Credit Facility | 2020 ABL Facility | Line of Credit
Business Acquisition [Line Items]
Debt drawn	$ 1,470,000
Estimated interest rate	2.046%
Mobile Mini, Inc.
Business Acquisition [Line Items]
Revenues			133,663		284,240
Mobile Mini, Inc.
Business Acquisition [Line Items]
Pro forma revenues			390,525		796,923
Income (loss) before income tax			8,575		139,890
Pro forma income before income tax			8,552		115,904
Income tax expense			9,737		23,244
Pro forma net (loss) income			(1,162)		116,646
Intangible assets	$ 374,500
Mobile Mini, Inc. | Mobile Mini customer relationships
Business Acquisition [Line Items]
Intangible assets	$ 209,000
Intangible assets, weighted average life	13 years
Mobile Mini, Inc. | Elimination of Merger transaction costs
Business Acquisition [Line Items]
Income (loss) before income tax			3,198		27,849
Mobile Mini, Inc. | Impact of fair value mark-ups on rental fleet depreciation
Business Acquisition [Line Items]
Income (loss) before income tax			(1,167)		(2,334)
Mobile Mini, Inc. | Other depreciation expense and intangible asset amortization
Business Acquisition [Line Items]
Income (loss) before income tax			(5,669)		(11,338)
Mobile Mini, Inc. | Interest expense
Business Acquisition [Line Items]
Income (loss) before income tax			(3,549)		(6,113)
Mobile Mini, Inc. | Elimination of Mobile Mini interest expense
Business Acquisition [Line Items]
Income (loss) before income tax			7,210		15,922
Mobile Mini, Inc. | Mobile Mini, Inc.
Business Acquisition [Line Items]
Income (loss) before income tax			$ 22,967		$ 37,874

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