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Deposits to Acquire Intangible Assets Deposits to Acquire Intangible Assets(Narrative)(Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Deposits to Acquire Intangible Assets Disclosure [Abstract] |  |
Deposits Assets, Noncurrent | $ 145,000 | $ 2,000

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- Definition Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Deposits to Acquire Intangible Assets Disclosure [Abstract] + References No definition available. + Details
Name: | vrsn_DepositstoAcquireIntangibleAssetsDisclosureAbstract
Namespace Prefix: | vrsn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration