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Stock-Based Compensation - Stock Options Outstanding (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding at 12/31/23	3,894	3,148
Options Exercisable at 12/31/23	1,478
Weighted Average Exercise Price, Options exercisable	$ 12.47
Adtran Networks [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding at 12/31/23	18	81
$5.23 - 5.23 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Range Limit	$ 5.23
Upper Range Limit	$ 5.23
Options Outstanding at 12/31/23	1,320
Weighted Average Remaining Contractual Life In Years, Options Outstanding	9 years 11 months 1 day
Weighted Average Exercise Price, Options Outstanding	$ 5.23
$5.24 - 8.58 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Range Limit	5.24
Upper Range Limit	$ 8.58
Options Outstanding at 12/31/23	716
Weighted Average Remaining Contractual Life In Years, Options Outstanding	2 years 3 days
Weighted Average Exercise Price, Options Outstanding	$ 7.37
Options Exercisable at 12/31/23	559
Weighted Average Exercise Price, Options exercisable	$ 7.45
$8.59 - 12.17 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Range Limit	8.59
Upper Range Limit	$ 12.17
Options Outstanding at 12/31/23	773
Weighted Average Remaining Contractual Life In Years, Options Outstanding	3 years 8 months 19 days
Weighted Average Exercise Price, Options Outstanding	$ 11.49
Options Exercisable at 12/31/23	195
Weighted Average Exercise Price, Options exercisable	$ 9.49
$12.18 - 15.33 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Range Limit	12.18
Upper Range Limit	$ 15.33
Options Outstanding at 12/31/23	415
Weighted Average Remaining Contractual Life In Years, Options Outstanding	2 years 2 months 12 days
Weighted Average Exercise Price, Options Outstanding	$ 15.33
Options Exercisable at 12/31/23	362
Weighted Average Exercise Price, Options exercisable	$ 15.33
$15.34 - 19.08 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Range Limit	15.34
Upper Range Limit	$ 19.08
Options Outstanding at 12/31/23	670
Weighted Average Remaining Contractual Life In Years, Options Outstanding	2 years 11 months 4 days
Weighted Average Exercise Price, Options Outstanding	$ 19.02
Options Exercisable at 12/31/23	362
Weighted Average Exercise Price, Options exercisable	$ 18.97
Euro 10.00 - Euro 10.00 [Member] | Adtran Networks [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Range Limit	10
Upper Range Limit	$ 10
Options Outstanding at 12/31/23	18
Weighted Average Remaining Contractual Life In Years, Options Outstanding	4 years 5 months 23 days
Weighted Average Exercise Price, Options Outstanding	$ 11.04

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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X

- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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-Topic 718
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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No definition available.

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Topic 718
-SubTopic 10
-Section 50
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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Topic 718
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-Section 50
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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
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-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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