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Business Combination - Additional Information (Details) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 9 Months Ended |  |
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Jul. 15, 2022 USD ($) $ / shares shares | Aug. 30, 2021 $ / shares shares | Sep. 30, 2023 USD ($) $ / shares shares | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) $ / shares shares | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) $ / shares shares | Aug. 30, 2021 € / shares shares
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Common stock, par value | $ / shares |  |  | $ 0.01 | $ 0.01 |  | $ 0.01 |  | $ 0.01 |
Common stock, shares outstanding | shares |  |  |  | 78,391,000 |  | 78,391,000 |  | 77,889,000 |
Common stock, reserved for future issuance | shares |  | 27,994,595 |  |  |  |  |  |  |
Goodwill |  |  |  | $ 339,083 |  | $ 339,083 |  | $ 381,724 |
Total Revenue |  |  |  | 272,331 | $ 340,709 | 923,621 | $ 667,265 |  |
Net Loss attributable to ADTRAN Holdings, Inc. |  |  |  | (78,563) | (41,934) | (157,743) | (40,918) |  |
Net loss attributable to non-controlling interest | [1] |  |  | 2,914 | (2,925) | 5,426 | (2,925) |  |
Decrease in goodwill |  | $ 8,700 |  |  |  |  |  |  |
Network Solutions [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill |  |  |  | 294,407 |  | 294,407 |  | 298,280 |
Total Revenue |  |  |  | 228,564 | 304,940 | 793,984 | 599,306 |  |
Services & Support [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill |  |  |  | 44,676 |  | 44,676 |  | $ 83,444 |
Total Revenue |  |  |  | 43,767 | 35,769 | 129,637 | 67,959 |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Percentage of common stock exchanged |  |  | 64.00% |  |  |  |  |  |
Adtran Networks SE [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business combination date of agreement |  |  | Aug. 30, 2021 |  |  |  |  |  |
Common stock, shares outstanding | shares |  | 33,957,538 |  |  |  |  |  |  |
Percentage of outstanding bearer shares |  | 65.43% | 65.43% |  |  |  |  |  |
Fair value of stock options assumed |  | $ 12,800 |  |  |  |  |  |  |
Goodwill |  | 350,458 |  | 350,500 |  | 350,500 |  |  |
Accounts receivable |  | 114,659 |  |  |  |  |  |  |
Other receivables |  | 1,457 |  |  |  |  |  |  |
Unpaid principal balance of account receivable |  | 118,500 |  |  |  |  |  |  |
Unpaid principal balance of other receivable |  | 1,500 |  |  |  |  |  |  |
Fair value of noncontrolling interest |  | $ 316,415 |  |  |  |  |  |  |
Total Revenue |  |  |  | 158,400 |  | 537,500 |  |  |
Net Loss attributable to ADTRAN Holdings, Inc. |  |  |  | 38,800 |  | 79,400 |  |  |
Net loss attributable to non-controlling interest |  |  |  | 0 |  | 3,200 |  |  |
Accrued annual recurring cash compensation non-controlling shareholders |  |  |  | 2,900 |  | 8,600 |  |  |
Shares held by noncontrolling interest | shares |  |  | 17,941,496 |  |  |  |  |  | 17,941,496
Closing share price | (per share) |  | $ 20.2 | $ 17.64 |  |  |  |  |  | € 17.58
Currency conversion rate |  | 1.00318 |  |  |  |  |  |  |
Adtran Networks SE [Member] | Selling, General and Administrative Expense [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Transaction costs incurred |  |  |  |  |  | 26,200 |  |  |
Transaction costs related to the business combination |  |  |  | $ 8 | $ 10,600 | $ 100 | $ 13,300 |  |
Adtran Networks SE [Member] | Network Solutions [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill |  | $ 272,800 |  |  |  |  |  |  |
Adtran Networks SE [Member] | Services & Support [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill |  | $ 77,700 |  |  |  |  |  |  |
Adtran Networks SE [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Number of shares issuable for each share of acquired entity | shares |  |  | 0.8244 |  |  |  |  |  |
Percentage of common stock exchanged |  |  | 36.00% |  |  |  |  |  |
[1] | (1) For the three and nine months ended September 30, 2023, we have recognized $2.9 million and $8.6 million, respectively, representing the recurring cash compensation earned by non-controlling interest shareholders post-DPLTA, partially offset by a $3.2 million net loss attributable to non-controlling interests pre-DPLTA for the nine months ended September 30, 2023.

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