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Segment Information - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) Segment Category	Sep. 30, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment			2
Number of categories | Category			3
Depreciation expense	$ 7,400,000	$ 7,100,000	$ 22,600,000	$ 12,600,000
Network Solutions [Member]
Segment Reporting Information [Line Items]
Depreciation expense	1,500,000	1,100,000	4,500,000	1,600,000
Services And Support [Member]
Segment Reporting Information [Line Items]
Depreciation expense	$ 2,400	$ 2,400	$ 7,300	$ 8,000

X

- Definition

Sales information by product category.

+ References

No definition available.

+ Details

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Namespace Prefix:	adtn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1

+ Details

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Period Type:	duration

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-18

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X

- Definition

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.

+ References

No definition available.

+ Details

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- Details

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Namespace Prefix:
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Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: