XML 31 R21.htm IDEA: XBRL DOCUMENT
v3.21.2

Basis of Presentation of Interim Period Statements - Additional Information (Detail) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 USD ($) Company | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Abstract] |  |  |
Revenue recognition professional employer service contracts term | 1 year |  |
Professional employer service contract cancellation and termination period | 30 days |  |
Payment term for staffing customers | 30 days |  |
Number of wholly-owned insurance companies | Company | 2 |  |
Cash and cash equivalents, maturity term | 3 months |  |
Allowance for doubtful accounts | $ 460,000 |  | $ 757,000
Estimate of liability for unpaid safety incentives | 5,400,000 |  | $ 18,800,000
Income taxes paid | $ 3,500,000 | $ 3,200,000 |

X
- Definition Cash and cash equivalents maximum maturity period. + References No definition available. + Details
Name: | bbsi_CashAndCashEquivalentsMaximumMaturityPeriod
Namespace Prefix: | bbsi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimate of liability for unpaid safety incentives. + References No definition available. + Details
Name: | bbsi_EstimateOfLiabilityForUnpaidSafetyIncentives
Namespace Prefix: | bbsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of wholly owned insurance companies. + References No definition available. + Details
Name: | bbsi_NumberOfWhollyOwnedInsuranceCompanies
Namespace Prefix: | bbsi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Payment term for staffing customers. + References No definition available. + Details
Name: | bbsi_PaymentTermForStaffingCustomers
Namespace Prefix: | bbsi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period for cancellation or termination of PEO service contract. + References No definition available. + Details
Name: | bbsi_PeriodForCancellationOrTerminationOfPeoServiceContract
Namespace Prefix: | bbsi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue recognition PEO service contract minimum term. + References No definition available. + Details
Name: | bbsi_RevenueRecognitionPeoServiceContractMinimumTerm
Namespace Prefix: | bbsi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4297-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585 + Details
Name: | us-gaap_IncomeTaxesPaid
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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