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Note 15 - Related Parties (Details Textual) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Percentage Of Ownership On Outstanding Common Stock Required To Become Related Party | 5.00% |
Related Party Transaction, Amounts of Transaction | $ 0 | $ 0

X
- Definition Amount of transactions with related party during the financial reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483326/850-10-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483326/850-10-50-3 + Details
Name: | us-gaap_RelatedPartyTransactionAmountsOfTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents percentage of ownership on outstanding common stock required to become related party. + References No definition available. + Details
Name: | vrsk_PercentageOfOwnershipOnOutstandingCommonStockRequiredToBecomeRelatedParty
Namespace Prefix: | vrsk_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant