Revenue Recognition - Summary of Disaggregates the Company's Revenue by Lease and Non Lease (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Disaggregation Of Revenue [Line Items]
Leasing revenues		$ 118,500
Total non-lease revenues		16,815	$ 15,439
Total revenues		145,373	121,195
Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		118,484	97,955
Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		11,386	8,575
Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		15,227	14,339
Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		276	326
Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		26,889	23,240
Mobile Modular [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		10,746	7,940
Total revenues		90,645	68,648
Mobile Modular [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		74,595	57,803
Mobile Modular [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		5,650	3,206
Mobile Modular [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		10,375	7,620
Mobile Modular [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		25	19
Mobile Modular [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		16,050	10,845
TRS-RenTelco [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		4,308	5,587
Total revenues		33,491	33,603
TRS-RenTelco [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		29,411	27,813
TRS-RenTelco [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		551	608
TRS-RenTelco [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		3,278	4,877
TRS-RenTelco [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		251	305
TRS-RenTelco [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		4,080	5,790
Adler Tanks [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		844	678
Total revenues		20,320	17,710
Adler Tanks [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		14,478	12,339
Adler Tanks [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		5,185	4,761
Adler Tanks [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		657	608
Adler Tanks [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues			2
Adler Tanks [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		5,842	5,371
Enviroplex [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues	[1]	917	1,234
Total revenues	[1]	917	1,234
Enviroplex [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		917	1,234
Enviroplex [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		$ 917	$ 1,234

[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.