Stock-Based Compensation - Stock Option Activity (Details) - $ / shares	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
WillScot Options
Options
Beginning balance (in shares)	534,188	534,188
Forfeited (in shares)		0
Exercised (in shares)	0	0
Ending balance (in shares)	534,188	534,188
Weighted-Average Exercise Price per Share
Beginning balance (in USD per share)	$ 13.60	$ 13.60
Forfeited (in USD per share)		0
Exercised (in USD per share)	0	0
Ending balance (in USD per share)	$ 13.60	$ 13.60
Vested and exercisable stock options (in shares)	534,188	400,641
Vested and exercisable stock options, weighted-average exercise price per share (in USD per share)	$ 13.60	$ 13.60
Converted Mobile Mini Options
Options
Beginning balance (in shares)	1,527,643	2,031,455
Forfeited (in shares)		(6,240)
Exercised (in shares)	(227,258)	(346,247)
Ending balance (in shares)	1,300,385	1,678,968
Weighted-Average Exercise Price per Share
Beginning balance (in USD per share)	$ 14.66	$ 14.78
Forfeited (in USD per share)		12.19
Exercised (in USD per share)	14.58	15.89
Ending balance (in USD per share)	$ 14.67	$ 14.57
Vested and exercisable stock options (in shares)	1,300,385	1,678,968
Vested and exercisable stock options, weighted-average exercise price per share (in USD per share)	$ 14.67	$ 0

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Number of share options (or share units) exercised during the current period.

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