Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022		Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenues		$ 200,536	$ 173,292	$ 522,940		$ 440,922
Sales and other revenues				101,217		83,115
Sales [Member]
Segment Reporting Information [Line Items]
Sales and other revenues		45,391	37,636	97,738		80,503
Enviroplex [Member]
Segment Reporting Information [Line Items]
Revenues		9,978	5,541	15,545	[1]	14,897	[1]
Sales and other revenues	[1]			15,545		14,897
Mobile Modular [Member]
Segment Reporting Information [Line Items]
Revenues		$ 125,838	$ 110,394	327,860		263,614
Sales and other revenues				65,315		49,770
Operating Segments [Member] | Enviroplex [Member] | Sales [Member]
Segment Reporting Information [Line Items]
Revenues				16,401		15,909
Inter-segment Eliminations [Member] | Mobile Modular [Member]
Segment Reporting Information [Line Items]
Sales and other revenues				$ 856		$ 1,012

[1] Gross Enviroplex sales revenues were $16,401 and $15,909 for the nine months ended September 30, 2022 and 2021, respectively. There were $856 and $1,012 inter-segment sales to Mobile Modular in the nine months ended September 30, 2022 and 2021, respectively, which required elimination in consolidation.