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Intangibles - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Jul. 01, 2020
Finite-Lived Intangible Assets [Line Items]          
Amortization expense for intangible assets $ 6.8 $ 13.8 $ 0.3 $ 0.5  
Mobile Mini, Inc.          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets, indefinite-lived         $ 164.0
Intangible assets, finite-lived         $ 210.5