Revenue Recognition - Summary of Disaggregates the Company's Revenue by Lease and Non Lease (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Disaggregation Of Revenue [Line Items]
Leasing revenues		$ 102,200
Total non-lease revenues		15,436	$ 17,857
Total revenues		129,453	122,008
Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		102,235	95,507
Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		12,798	9,953
Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		13,930	16,054
Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		490	494
Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		27,218	26,501
Mobile Modular [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		7,644	8,360
Total revenues		73,198	65,092
Mobile Modular [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		59,235	53,743
Mobile Modular [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		6,690	3,304
Mobile Modular [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		7,256	8,000
Mobile Modular [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		17	45
Mobile Modular [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		13,963	11,349
TRS-RenTelco [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		5,701	6,345
Total revenues		34,063	30,676
TRS-RenTelco [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		28,220	24,680
TRS-RenTelco [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		719	568
TRS-RenTelco [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		4,673	4,979
TRS-RenTelco [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		451	449
TRS-RenTelco [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		5,843	5,996
Adler Tanks [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		588	347
Total revenues		20,689	23,435
Adler Tanks [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		14,780	17,084
Adler Tanks [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		5,389	6,081
Adler Tanks [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		498	270
Adler Tanks [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		22
Adler Tanks [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		5,909	6,351
Enviroplex [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues	[1]	1,503	2,805
Total revenues	[1]	1,503	2,805
Enviroplex [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		1,503	2,805
Enviroplex [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		$ 1,503	$ 2,805

[1] Gross Enviroplex sales revenues were $2,778 and $2,805 for the three months ended March 31, 2020 and 2019, respectively. There were $1,275 inter-segment sales to Mobile Modular in the three months ended March 31, 2020, which required elimination in consolidation.  There were no inter-segment sales in the three months ended March 31, 2019.