Revenue Recognition - Summary of Disaggregates the Company's Revenue by Lease and Non Lease (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022		Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Leasing revenues		$ 136,500		$ 381,800
Total non-lease revenues				101,217		$ 83,115
Total revenues		200,536	$ 173,292	522,940		440,922
Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		136,518	118,078	381,826		323,543
Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		18,180	17,458	43,769		36,952
Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		45,167	37,365	95,923		79,309
Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		671	391	1,422		1,118
Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		64,018	55,214	141,114		117,379
Mobile Modular [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues				65,315		49,770
Total revenues		125,838	110,394	327,860		263,614
Mobile Modular [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		86,428	73,375	240,693		196,362
Mobile Modular [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		10,427	10,628	22,960		18,418
Mobile Modular [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		28,922	26,362	64,113		48,766
Mobile Modular [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		61	29	94		68
Mobile Modular [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		39,410	37,019	87,167		67,252
TRS-RenTelco [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues				17,040		15,971
Total revenues		38,527	35,074	109,359		102,460
TRS-RenTelco [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		32,265	29,692	92,585		86,223
TRS-RenTelco [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		684	591	1,919		1,821
TRS-RenTelco [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		5,291	4,502	14,031		13,485
TRS-RenTelco [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		287	289	824		931
TRS-RenTelco [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		6,262	5,382	16,774		16,237
Adler Tanks [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues				3,317		2,477
Total revenues		26,193	22,283	70,176		59,951
Adler Tanks [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		17,825	15,011	48,548		40,958
Adler Tanks [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		7,069	6,239	18,890		16,713
Adler Tanks [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		976	960	2,234		2,161
Adler Tanks [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		323	73	504		119
Adler Tanks [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		8,368	7,272	21,628		18,993
Enviroplex [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues	[1]			15,545		14,897
Total revenues		9,978	5,541	15,545	[1]	14,897	[1]
Enviroplex [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		9,978	5,541	15,545		14,897
Enviroplex [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		$ 9,978	$ 5,541	$ 15,545		$ 14,897

[1] Gross Enviroplex sales revenues were $16,401 and $15,909 for the nine months ended September 30, 2022 and 2021, respectively. There were $856 and $1,012 inter-segment sales to Mobile Modular in the nine months ended September 30, 2022 and 2021, respectively, which required elimination in consolidation.