Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenues		$ 145,373	$ 121,195
Sales revenues		16,815	15,439
Sales [Member]
Segment Reporting Information [Line Items]
Sales revenues		15,876	14,611
Enviroplex [Member]
Segment Reporting Information [Line Items]
Revenues	[1]	917	1,234
Sales revenues	[1]	917	1,234
Mobile Modular [Member]
Segment Reporting Information [Line Items]
Revenues		90,645	68,648
Sales revenues		10,746	7,940
Operating Segments [Member] | Enviroplex [Member] | Sales [Member]
Segment Reporting Information [Line Items]
Revenues		917	2,090
Inter-segment Eliminations [Member] | Mobile Modular [Member]
Segment Reporting Information [Line Items]
Sales revenues		$ 0	$ 856

[1] Gross Enviroplex sales revenues were $917 and $2,090 for the three months ended March 31, 2022 and 2021, respectively. There were $0 and $856 inter-segment sales to Mobile Modular in the three months ended March 31, 2022 and 2021, respectively, which required elimination in consolidation.