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Business Combination - Summary of Purchase Price for Business Combination (Details) - ADVA Optical Networking SE [Member] $ / shares in Units, $ in Thousands | Jul. 15, 2022 USD ($) $ / shares shares | Aug. 30, 2021 $ / shares | Aug. 30, 2021 € / shares
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
ADVA shares exchanged | shares | 33,957,538 |  |
Exchange ratio | 0.8244 |  |
ADTRAN Holdings, Inc. shares issued | shares | 27,994,595 |  |
ADTRAN Holdings, Inc. share price on July 15, 2022 | (per share) | $ 20.20 | $ 17.64 | € 17.58
Purchase price paid for ADVA shares | $ 565,491 |  |
Equity compensation | 12,769 |  |
Total purchase price | $ 578,260 |  |

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