Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenues	$ 910,942		$ 831,842		$ 635,665
Sales [Member]
Segment Reporting Information [Line Items]
Sales revenues	262,290		207,165		147,720
Enviroplex [Member]
Segment Reporting Information [Line Items]
Revenues	45,830	[1]	20,192	[1]	23,170
Mobile Modular [Member]
Segment Reporting Information [Line Items]
Revenues	635,366		562,236		379,211
Operating Segments [Member] | Enviroplex [Member] | Sales [Member]
Segment Reporting Information [Line Items]
Revenues	45,832		22,615		24,164
Inter-segment Eliminations [Member] | Mobile Modular [Member]
Segment Reporting Information [Line Items]
Sales revenues	$ 2		$ 2,423		$ 992

[1] Gross Enviroplex sales revenues were $45,832, $22,615 and $24,164 in 2024, 2023 and 2022, respectively. There were $2, $2,423 and $992 inter-segment sales to Mobile Modular in 2024, 2023 and 2022, respectively, which have been eliminated in consolidation.