Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Revenues		$ 103,105	$ 96,026	$ 196,804	$ 186,214
Enviroplex [Member]
Segment Reporting Information [Line Items]
Revenues	[1]			4,147	2,201
Mobile Modular [Member]
Segment Reporting Information [Line Items]
Revenues				94,763	81,004
Operating Segments [Member] | Enviroplex [Member]
Segment Reporting Information [Line Items]
Revenues				4,147	2,208
Inter-segment Eliminations [Member] | Mobile Modular [Member]
Segment Reporting Information [Line Items]
Sales revenues				$ 0	$ 7

[1] Gross Enviroplex sales revenues were $4,147 and $2,208 for the six months ended June 30, 2016 and 2015, respectively, which include inter-segment sales to Mobile Modular of $0 and $7, respectively, which have been eliminated in consolidation.