XML 89 R76.htm IDEA: XBRL DOCUMENT
v3.21.1

Long‑Term Debt - Capped Call Options Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended
--- | --- | ---
Jan. 26, 2021 | Mar. 31, 2021
Debt Disclosure [Abstract] |  |
Capped call transaction, cap price (USD per share) | $ 72.9795 |
Capped call, premium above share price, percentage | 65.00% |
Capped Call Options Expense |  | $ 150

X
- Definition Capped Call Options Expense + References No definition available. + Details
Name: | bsy_CappedCallOptionsExpense
Namespace Prefix: | bsy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Option Indexed to Issuer's Equity, Strike Price, Premium Over Share Price, Percentage + References No definition available. + Details
Name: | bsy_OptionIndexedToIssuersEquityStrikePricePremiumOverSharePricePercentage
Namespace Prefix: | bsy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise or strike price stated in the contract for options indexed to the issuer's equity shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 50 -Paragraph 5 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=120519210&loc=d3e90205-114008 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=109262807&loc=d3e22047-110879 + Details
Name: | us-gaap_OptionIndexedToIssuersEquityStrikePrice1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration