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HELD-FOR-SALE-CLASSIFICATION (Details) - Held for sale - Automation business line $ in Millions	Sep. 30, 2024 USD ($)
HELD-FOR-SALE-CLASSIFICATION
Consideration	$ 27.0
Cash consideration	20.0
Amount held in escrow	$ 7.0

X

- Definition

Amount of consideration to be held in Escrow upon the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

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Namespace Prefix:	iii_
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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of consideration received or receivable in cash for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

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

X

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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X

- Details

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Namespace Prefix:
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X

- Details

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Namespace Prefix:
Data Type:	na
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