Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Revenues		$ 93,699	$ 90,188
Enviroplex [Member]
Segment Reporting Information [Line Items]
Revenues	[1]	148	312
Mobile Modular [Member]
Segment Reporting Information [Line Items]
Revenues		45,084	38,884
Operating Segments [Member] | Enviroplex [Member]
Segment Reporting Information [Line Items]
Revenues		148	316
Inter-segment Eliminations [Member] | Mobile Modular [Member]
Segment Reporting Information [Line Items]
Sales revenues		$ 0	$ 4

[1] Gross Enviroplex sales revenues were $148 and $316 for the three months ended March 31, 2016 and 2015, respectively, which include inter-segment sales to Mobile Modular of $0 and $4, respectively, which have been eliminated in consolidation.