Revenue Recognition - Summary of Disaggregates the Company's Revenue by Lease and Non Lease (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Leasing revenues		$ 524,500
Total non-lease revenues		155,177	$ 128,759	$ 128,371
Total revenues		733,823	616,833	572,554
Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		524,499	442,598	401,923
Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		60,174	49,990	46,514
Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		147,348	122,781	122,447
Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		1,802	1,464	1,670
Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		209,324	174,235	170,631
Mobile Modular [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		101,578	70,417	65,278
Total revenues		461,717	363,316	321,524
Mobile Modular [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		331,201	269,175	235,003
Mobile Modular [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		30,430	25,034	22,576
Mobile Modular [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		99,978	68,982	63,863
Mobile Modular [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		108	125	82
Mobile Modular [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		130,516	94,141	86,521
TRS-RenTelco [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		26,291	23,895	28,648
Total revenues		150,778	140,194	140,811
TRS-RenTelco [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		125,695	116,769	112,210
TRS-RenTelco [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		2,579	2,469	2,618
TRS-RenTelco [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		21,267	19,788	24,461
TRS-RenTelco [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		1,237	1,168	1,522
TRS-RenTelco [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		25,083	23,425	28,601
Adler Tanks [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		4,138	3,366	1,708
Total revenues		98,158	82,242	77,482
Adler Tanks [Member] | Leasing [Member]
Disaggregation Of Revenue [Line Items]
Leasing revenues		67,603	56,654	54,710
Adler Tanks [Member] | Non-lease Rental Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		27,165	22,487	21,320
Adler Tanks [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		2,933	2,930	1,386
Adler Tanks [Member] | Non-lease Other [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		457	171	66
Adler Tanks [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		30,555	25,588	22,772
Enviroplex [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues	[1]	23,170	31,081	32,737
Total revenues	[1]	23,170	31,081	32,737
Enviroplex [Member] | Non-lease Sales [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		23,170	31,081	32,737
Enviroplex [Member] | Non-lease Revenues [Member]
Disaggregation Of Revenue [Line Items]
Total non-lease revenues		$ 23,170	$ 31,081	$ 32,737

[1] Gross Enviroplex sales revenues were $24,162, $32,095 and $34,014 in 2022, 2021 and 2020, respectively. There were $992 and $1,014 inter-segment sales to Mobile Modular in 2022 and 2021, which have been eliminated in consolidation. There were no inter-segment sales in 2019.