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Stock-Based Compensation (PSUs, RSUs and Restricted Stock) - Additional Information (Detail) - USD ($) shares in Thousands, $ in Millions |  | 12 Months Ended
--- | --- | ---
Jul. 15, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Share granted |  | 1,097 |  |
Executive Officers and Certain Employees [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Share granted |  |  |  | 300
Adtran Networks [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Number of market based PSU awards converted to time based RSU awards | 300 |  |  |
Performance Stock Units (PSUs) [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting period |  |  |  | 3 years
Share granted |  | 100 | 900 |
Unrecognized compensation expense related to other than options |  | $ 10.9 |  |
Recognition period of non-vested compensation cost |  | 1 year |  |
Performance Stock Units (PSUs) [Member] | Executive Officers and Certain Employees [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting period |  |  | 1 year | 2 years
Performance Stock Units (PSUs) [Member] | Minimum [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Percentage of performance stock units granted |  |  |  | 0.00%
Performance Stock Units (PSUs) [Member] | Minimum [Member] | Executive Officers and Certain Employees [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Percentage of performance stock units granted |  |  | 0.00% | 0.00%
Performance Stock Units (PSUs) [Member] | Maximum [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Percentage of performance stock units granted |  |  |  | 150.00%
Performance Stock Units (PSUs) [Member] | Maximum [Member] | Executive Officers and Certain Employees [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Percentage of performance stock units granted |  |  | 142.80% | 142.80%
PSUs, RSUs and Restricted Stock [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting period |  | 4 years |  |
Restricted Stock [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting period |  | 1 year |  |
Market-Based PSUs, RSUs and Restricted Stock [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Unrecognized compensation expense related to other than options |  | $ 10.7 |  |
Recognition period of non-vested compensation cost |  | 2 years 1 month 6 days |  |
Time-Based RSUs [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Unrecognized compensation expense related to other than options |  |  |  | $ 17.8
Unrecognized compensation expense related to other than options |  | $ 3.2 |  |
Recognition period of non-vested compensation cost |  | 10 months 24 days |  |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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