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Business Combination - Additional Information (Details) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jul. 15, 2022 USD ($) $ / shares | Aug. 30, 2021 USD ($) $ / shares shares | Mar. 31, 2023 USD ($) $ / shares shares | Mar. 31, 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 |
Common stock, shares outstanding | shares |  |  |  | 78,361,000 |  | 77,889,000 |
Common stock, reserved for future issuance | shares |  |  | 27,994,595 |  |  |  | 27,994,595
Goodwill |  |  |  | $ 385,755 |  | $ 381,724 |
Total Revenue |  |  |  | 323,912 | $ 154,518 |  |
Net loss attributable to ADTRAN Holdings, Inc. |  |  |  | (34,464) | (1,127) |  |
Net loss attributable to non-controlling interest | [1] |  |  | (5,989) |  |  |
Decrease in goodwill |  | $ 8,700 |  |  |  |  |
Network Solutions [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  | 301,419 |  | 298,280 |
Total Revenue |  |  |  | 282,418 | 138,374 |  |
Services & Support [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  | 84,336 |  | $ 83,444 |
Total Revenue |  |  |  | 41,494 | 16,144 |  |
Common Stock [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of common stock exchanged |  |  | 64.00% |  |  |  |
ADVA Optical Networking SE [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business combination date of agreement |  |  | Aug. 30, 2021 |  |  |  |
Common stock, shares outstanding | shares |  |  | 33,957,538 |  |  |  | 33,957,538
Percentage of outstanding bearer shares |  |  | 65.43% |  |  |  |
Fair value of stock options assumed |  |  | $ 12,800 |  |  |  |
Goodwill |  | 350,458 |  | 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 |  | 192,300 |  |  |  |  |
Net loss attributable to ADTRAN Holdings, Inc. |  | $ 25,400 |  |  |  |  |
Net loss attributable to non-controlling interest |  |  |  | 6,000 |  |  |
Shares held by noncontrolling interest | shares |  |  | 17,941,496 |  |  |  | 17,941,496
Closing share price | (per share) |  | $ 20.20 | $ 17.64 |  |  |  | € 17.58
Currency conversion rate |  | 1.00318 |  |  |  |  |
ADVA Optical Networking SE [Member] | Selling, General and Administrative Expense [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Transaction costs incurred |  |  |  | 26,100 |  |  |
Transaction costs related to the business combination |  |  |  | $ 0 | $ 1,500 |  |
ADVA Optical Networking SE [Member] | Network Solutions [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill |  | $ 272,800 |  |  |  |  |
ADVA Optical Networking SE [Member] | Services & Support [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill |  | $ 77,700 |  |  |  |  |
ADVA Optical Networking 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] | Includes $3.2 million of net loss attributable to non-controlling interests pre-DPLTA and $2.8 million of annual recurring compensation earned by redeemable non-controlling interests and accrued by the Company post-DPLTA.

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