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Revenue Recognition - Summary of Disaggregates the Company's Revenue by Lease and Non Lease (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Disaggregation Of Revenue [Line Items] |  |  |
Leasing revenues |  | $ 98,000 |
Total non-lease revenues |  | 15,439 | $ 15,436
Total revenues |  | 121,195 | 129,453
Leasing [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Leasing revenues |  | 97,955 | 102,235
Non-lease Rental Related Services [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 8,575 | 12,798
Non-lease Sales [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 14,339 | 13,930
Non-lease Other [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 326 | 490
Non-lease Revenues [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 23,240 | 27,218
Mobile Modular [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 7,940 | 7,644
Total revenues |  | 68,648 | 73,198
Mobile Modular [Member] | Leasing [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Leasing revenues |  | 57,803 | 59,235
Mobile Modular [Member] | Non-lease Rental Related Services [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 3,206 | 6,690
Mobile Modular [Member] | Non-lease Sales [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 7,620 | 7,256
Mobile Modular [Member] | Non-lease Other [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 19 | 17
Mobile Modular [Member] | Non-lease Revenues [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 10,845 | 13,963
TRS-RenTelco [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 5,587 | 5,701
Total revenues |  | 33,603 | 34,063
TRS-RenTelco [Member] | Leasing [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Leasing revenues |  | 27,813 | 28,220
TRS-RenTelco [Member] | Non-lease Rental Related Services [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 608 | 719
TRS-RenTelco [Member] | Non-lease Sales [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 4,877 | 4,673
TRS-RenTelco [Member] | Non-lease Other [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 305 | 451
TRS-RenTelco [Member] | Non-lease Revenues [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 5,790 | 5,843
Adler Tanks [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 678 | 588
Total revenues |  | 17,710 | 20,689
Adler Tanks [Member] | Leasing [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Leasing revenues |  | 12,339 | 14,780
Adler Tanks [Member] | Non-lease Rental Related Services [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 4,761 | 5,389
Adler Tanks [Member] | Non-lease Sales [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 608 | 498
Adler Tanks [Member] | Non-lease Other [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 2 | 22
Adler Tanks [Member] | Non-lease Revenues [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 5,371 | 5,909
Enviroplex [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues | [1] | 1,234 | 1,503
Total revenues | [1] | 1,234 | 1,503
Enviroplex [Member] | Non-lease Sales [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | 1,234 | 1,503
Enviroplex [Member] | Non-lease Revenues [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total non-lease revenues |  | $ 1,234 | $ 1,503
[1] | Gross Enviroplex sales revenues were $2,090 and $2,778 for the three months ended March 31, 2021 and 2020, respectively. There were $856 and $1,275 inter-segment sales to Mobile Modular in the three months ended March 31, 2021 and 2020, respectively, which required elimination in consolidation.

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- Definition Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919372-209981 + Details
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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