XML 82 R76.htm IDEA: XBRL DOCUMENT
v3.25.1

Redeemable Non-controlling Interest - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Redeemable Noncontrolling Interest [Line Items] |  |  |
Accrued annual recurring compensation to redeemable non-controlling shareholders | $ 2.4 | $ 2.5 |
DPLTA [Member] |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Accrued annual recurring compensation to redeemable non-controlling shareholders | $ 2.4 |  | $ 9.8
Adtran Networks [Member] |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Equity ownership percentage | 33.00% |  | 33.00%

X
- Definition Accrued Annual Recurring Compensation Obligation + References No definition available. + Details
Name: | adtn_AccruedAnnualRecurringCompensationObligation
Namespace Prefix: | adtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RedeemableNoncontrollingInterestLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=adtn_DominationAndProfitAndLossTransferAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=adtn_AdtranNetworksSeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |