XML 92 R83.htm IDEA: XBRL DOCUMENT
v3.25.2

Commitments and Contingencies - Additional Information (Detail) € / shares in Units, € in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2025 USD ($) shares | Jun. 30, 2025 EUR (€) shares | Jun. 30, 2024 USD ($) shares | Jun. 30, 2024 EUR (€) shares | Jun. 30, 2025 USD ($) shares | Jun. 30, 2025 EUR (€) € / shares shares | Jun. 30, 2024 USD ($) shares | Jun. 30, 2024 EUR (€) shares | Jun. 30, 2025 EUR (€) | Dec. 31, 2024 USD ($)
Commitments And Contingencies Line Items |  |  |  |  |  |  |  |  |  |  |
Cash compensation per share | € / shares |  |  |  |  |  |  | € 17.21 |  |  |  |
Recurring cash compensation per share | € / shares |  |  |  |  |  |  | € 0.52 |  |  |  |
Aggregate exit compensation payments obligation including guaranteed interest |  | $ 385,200 |  |  |  | $ 385,200 |  |  |  | € 326,800 |
Number of shares tendered | shares |  | 900 | 900 |  |  | 900 | 900 |  |  |  |
Exit compensation payments |  | $ 19,400 | € 16,900 |  |  | $ 19,400 | € 16,900 |  |  |  |
Percentage of guaranteed interest rate |  | 5.00% |  |  |  | 5.00% |  |  |  | 5.00% |
Percentage of guaranteed interest rate plus a variable component |  | 2.27% |  |  |  | 2.27% |  |  |  | 2.27% |
Annual recurring compensation obligation |  |  |  |  |  | $ 10,000 | € 8,500 |  |  |  |
Expire date of exit compensation |  |  |  |  |  | Mar. 16, 2023 | Mar. 16, 2023 |  |  |  |
Accrued annual recurring compensation obligation |  | $ 2,400 |  | $ 2,500 |  | $ 4,800 |  | $ 5,000 |  |  |
Commitments related to performance bonds |  | 16,900 |  |  |  | $ 16,900 |  |  |  |  | $ 15,700
Commitments related to performance bonds expiration month and year |  |  |  |  |  | 2029-04 | 2029-04 |  |  |  |
Purchase obligations |  | 192,700 |  |  |  | $ 192,700 |  |  |  |  |
Less: Net Income attributable to non-controlling interest | [1] | $ 2,273 |  | $ 2,505 |  | $ 4,592 |  | $ 5,035 |  |  |
Adtran Networks [Member] |  |  |  |  |  |  |  |  |  |  |
Commitments And Contingencies Line Items |  |  |  |  |  |  |  |  |  |  |
Number of shares tendered | shares |  | 900,000 | 900,000 | 1,000,000 | 1,000,000 | 900,000 | 900,000 | 1,000,000 | 1,000,000 |  |
Exit compensation payments |  | $ 19,400 | € 16,900 | $ 20 | € 19 | $ 19,400 | € 16,900 | $ 25 | € 23 |  |
Adtran Networks [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Commitments And Contingencies Line Items |  |  |  |  |  |  |  |  |  |  |
Number of shares tendered | shares |  |  |  | 1,000 | 1,000 |  |  | 1,000 | 1,000 |  |
[1] | For the three and six months ended June 30, 2025 we accrued $2.4 million and $4.8 million, respectively, net income attributable to non-controlling interest, representing the recurring cash compensation earned by non-controlling interest shareholders post-DPLTA. For the three and six months ended June 30, 2024, we accrued $2.5 million and $5.0 million, respectively, representing the recurring cash compensation earned by non-controlling interest shareholders post-DPLTA.

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 Aggregate Exit Compensation Payments Obligation + References No definition available. + Details
Name: | adtn_AggregateExitCompensationPaymentsObligation
Namespace Prefix: | adtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Commitments And Contingencies Line Items + References No definition available. + Details
Name: | adtn_CommitmentsAndContingenciesLineItems
Namespace Prefix: | adtn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Commitments related to performance bonds. + References No definition available. + Details
Name: | adtn_CommitmentsRelatedToPerformanceBonds
Namespace Prefix: | adtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Commitments related to performance bonds expiration month and year. + References No definition available. + Details
Name: | adtn_CommitmentsRelatedToPerformanceBondsExpirationMonthAndYear
Namespace Prefix: | adtn_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exit compensation payments. + References No definition available. + Details
Name: | adtn_ExitCompensationPayments
Namespace Prefix: | adtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Expire Date of Exit Compensation + References No definition available. + Details
Name: | adtn_ExpireDateOfExitCompensation
Namespace Prefix: | adtn_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares tendered. + References No definition available. + Details
Name: | adtn_NumberOfSharesTendered
Namespace Prefix: | adtn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of guaranteed interest rate. + References No definition available. + Details
Name: | adtn_PercentageOfGuaranteedInterestRate
Namespace Prefix: | adtn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of guaranteed interest rate plus a variable component. + References No definition available. + Details
Name: | adtn_PercentageOfGuaranteedInterestRatePlusVariableComponent
Namespace Prefix: | adtn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Recurring cash compensation per share. + References No definition available. + Details
Name: | adtn_RecurringCashCompensationPerShare
Namespace Prefix: | adtn_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Shares exchange for compensation in cash per share. + References No definition available. + Details
Name: | adtn_SharesExchangeForCompensationInCashPerShare
Namespace Prefix: | adtn_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-8 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(17)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482765/220-10-50-6 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-1A Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -Publisher FASB -URI https://asc.fasb.org/1943274/2147481175/810-10-55-4J Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-1A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-1B + Details
Name: | us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
Name: | us-gaap_PurchaseObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |