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Redeemable Non-controlling Interest - Summary of Redeemable Non-controlling Interest Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Redeemable Noncontrolling Interest [Line Items]
Balance at beginning of period	$ 442,152
Reclassification of non-controlling interests	1,175	$ 443,757
Redemption of redeemable non-controlling interests	(20,384)	(1,657)
Net income attributable to redeemable non-controlling interests	9,824	10,092
Annual recurring compensation earned	(9,824)	(10,092)
Balance at end of period	$ 422,943	442,152
Adtran Networks [Member]
Redeemable Noncontrolling Interest [Line Items]
Stock option exercises		$ 52

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- Definition

Reclassification of Redeemable Non-controlling Interests

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Redeemable Non-controlling Interest Annual Recurring Compensation Earned

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- Definition

Redeemable noncontrolling interest stock option exercises.

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- Definition

Amount of Net Income (Loss) attributable to redeemable noncontrolling interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(19))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

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- Definition

As of the reporting date, the carrying amount of noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. The noncontrolling interest holder's ownership (or holders' ownership) may be in the form of common shares (regardless of class), limited partnership units (regardless of class), non-preferential membership interests, or any other form of common equity regardless of investee entity legal form.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Subparagraph (12)(c)
-Section S99
-Paragraph 3A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480244/480-10-S99-3A

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-Name Accounting Standards Codification
-Topic 480
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-Subparagraph (16)(c)
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-Section S99
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-Topic 480
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-Section S99
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-URI https://asc.fasb.org/1943274/2147480244/480-10-S99-3A

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-Topic 480
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- Definition

Redemption value, as if currently redeemable, of redeemable noncontrolling interest for common shares, units or ownership interests classified as temporary equity and the election has been made to accrete changes in redemption value to the earliest redemption date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 480
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-Section S99
-Paragraph 3A
-Subparagraph (24)(b)
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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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