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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 | 12 Months Ended
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Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Leasing revenues |  |  |  |  |  |  |  |  |  | $ 411,000 |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 115,303 | $ 96,649 | $ 94,549
Total revenues |  | $ 147,221 | $ 173,562 | $ 127,439 | $ 122,008 | $ 133,115 | $ 143,147 | $ 116,983 | $ 105,085 | 570,230 | 498,330 | 462,034
Leasing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Leasing revenues |  |  |  |  |  |  |  |  |  | 410,993 | 365,212 | 331,218
Non-lease Rental Related Services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 49,197 | 41,753 | 40,011
Non-lease Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 107,120 | 89,452 | 89,302
Non-lease Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 2,920 | 1,913 | 1,503
Non-lease Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 159,237 | 133,118 | 130,816
Mobile Modular [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 49,299 | 40,742 | 38,234
Total revenues |  |  |  |  |  |  |  |  |  | 301,010 | 254,574 | 231,266
Mobile Modular [Member] | Leasing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Leasing revenues |  |  |  |  |  |  |  |  |  | 234,032 | 200,214 | 180,612
Mobile Modular [Member] | Non-lease Rental Related Services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 18,964 | 14,870 | 13,331
Mobile Modular [Member] | Non-lease Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 47,045 | 39,467 | 37,434
Mobile Modular [Member] | Non-lease Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 969 | 23 | (111)
Mobile Modular [Member] | Non-lease Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 66,978 | 54,360 | 50,654
TRS-RenTelco [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 24,519 | 25,420 | 22,374
Total revenues |  |  |  |  |  |  |  |  |  | 131,483 | 118,657 | 108,044
TRS-RenTelco [Member] | Leasing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Leasing revenues |  |  |  |  |  |  |  |  |  | 108,044 | 94,345 | 85,930
TRS-RenTelco [Member] | Non-lease Rental Related Services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 2,599 | 2,607 | 2,358
TRS-RenTelco [Member] | Non-lease Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 18,995 | 19,895 | 18,137
TRS-RenTelco [Member] | Non-lease Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 1,845 | 1,810 | 1,619
TRS-RenTelco [Member] | Non-lease Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 23,439 | 24,312 | 22,114
Adler Tanks [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 1,671 | 1,441 | 2,572
Total revenues |  |  |  |  |  |  |  |  |  | 97,923 | 96,053 | 91,355
Adler Tanks [Member] | Leasing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Leasing revenues |  |  |  |  |  |  |  |  |  | 68,917 | 70,653 | 64,676
Adler Tanks [Member] | Non-lease Rental Related Services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 27,634 | 24,276 | 24,322
Adler Tanks [Member] | Non-lease Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 1,266 | 1,044 | 2,362
Adler Tanks [Member] | Non-lease Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 106 | 80 | (5)
Adler Tanks [Member] | Non-lease Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 29,006 | 25,400 | 26,679
Enviroplex [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues | [1] |  |  |  |  |  |  |  |  | 39,814 | 29,046 | 31,369
Total revenues | [1] |  |  |  |  |  |  |  |  | 39,814 | 29,046 | 31,369
Enviroplex [Member] | Non-lease Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 39,814 | 29,046 | 31,369
Enviroplex [Member] | Non-lease Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | $ 39,814 | $ 29,046 | $ 31,369
[1] | Gross Enviroplex sales revenues were $39,814, $30,407 and $31,369 in 2019, 2018 and 2017, respectively. There were $1,361 inter-segment sales to Mobile Modular in 2018, which have been eliminated in consolidation. There were no inter-segment sales in 2019 and 2017.

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