XML 63 R47.htm IDEA: XBRL DOCUMENT v3.22.0.1

Worker's Compensation Claims - Summary of Risk Retained by Insured Program after Considering Loss Portfolio Transfers and Current Insurance Arrangements (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Percentage of claim excluded	10.00%

X

- Definition

Percentage of claims excluded.

+ References

No definition available.

+ Details

Name:	bbsi_PercentageOfClaimsExcluded
Namespace Prefix:	bbsi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration