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)	$ 20.2	$ 17.64	€ 17.58
Purchase price paid for ADVA shares	$ 565,491
Equity compensation	12,769
Total purchase price	$ 578,260

Business combination exchange ratio.

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Business combination number of shares exchanged.

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Number of shares of equity interests issued or issuable to acquire entity.

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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.

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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