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Supplemental Cash Flow Information (Non-Cash) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Non-cash financing activity:
Excise tax on share repurchases	$ 196	$ 0

X

- Definition

Amount of excise tax on share purchased under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481549/505-30-45-1

+ Details

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Period Type:	duration

X

- Definition

Cash Flow, Noncash Financing Activities Disclosure

+ References

No definition available.

+ Details

Name:	zd_CashFlowNoncashFinancingActivitiesDisclosureAbstract
Namespace Prefix:	zd_
Data Type:	xbrli:stringItemType
Balance Type:	na
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