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Consolidated Statements of Stockholders' Equity (Parenthetical) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($)
Purchase of capped call options, tax | $ 12,871

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- Definition Adjustments To Additional Paid Capital, Purchase Of Capped Call Options, Tax + References No definition available. + Details
Name: | bsy_AdjustmentsToAdditionalPaidCapitalPurchaseOfCappedCallOptionsTax
Namespace Prefix: | bsy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration