XML 54 R42.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Stock Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Summary of Stock Awards Granted, Vested, Cash Settled, and Forfeited | The following table shows the number of stock awards that were granted, vested, cash settled, and forfeited during 2024:
| Restricted Stock Units |  |  | Performance Stock Units |
| Number of units |  |  | Weighted average grant date fair value |  |  | Number of units |  |  | Weighted average grant date fair value |
Unvested units as of December 31, 2023 |  | 230,574 |  |  | $ | 12.27 |  |  |  | 543,422 |  |  | $ | 13.37 |
Granted |  | 160,016 |  |  |  | 10.94 |  |  |  | — |  |  |  | — |
Vested - issued |  | (145,034 | ) |  |  | 10.96 |  |  |  | (210,156 | ) |  |  | 12.15 |
Vested - unissued |  | (35,413 | ) |  |  | 10.34 |  |  |  | — |  |  |  | — |
Cash settled |  | (370 | ) |  |  | 14.38 |  |  |  | (1,663 | ) |  |  | 14.11 |
Forfeited |  | (5,340 | ) |  |  | 13.34 |  |  |  | (6,522 | ) |  |  | 14.11 |
Unvested units as of December 31, 2024 |  | 204,433 |  |  | $ | 12.47 |  |  |  | 325,081 |  |  | $ | 14.13 |

X
- Definition Tabular disclosure of restricted stock units and performance stock units activity. + References No definition available. + Details
Name: | altg_ScheduleOfRestrictedStockUnitsAndPerformanceStockUnitsActivityTableTextBlock
Namespace Prefix: | altg_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration