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PROPERTY AND EQUIPMENT - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
PROPERTY AND EQUIPMENT
Property and equipment, assets not yet commenced depreciation	$ 3,900	$ 23,200
Depreciation and amortization of property and equipment	$ 16,728	13,539	$ 14,105
Leasehold improvements and equipment
PROPERTY AND EQUIPMENT
Property and equipment, assets not yet commenced depreciation		$ 18,900

X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets to periods that benefit from use of the assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	rbbn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of property, plant, and equipment for which depreciation will not be applied.

+ References

No definition available.

+ Details

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Namespace Prefix:	rbbn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

+ Details

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X

- Details

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Namespace Prefix:
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Period Type: