XML 34 R23.htm IDEA: XBRL DOCUMENT v3.7.0.1

Fair Value Measurement - Summary of Investments (Parenthetical) (Detail) $ in Millions	Mar. 31, 2017 USD ($)
Fair Value Disclosures [Abstract]
Restricted cash and long term workers' compensation deposits	$ 4.7

X

- Definition

Restricted cash and long term workers compensation deposits.

+ References

No definition available.

+ Details

Name:	bbsi_RestrictedCashAndLongTermWorkersCompensationDeposits
Namespace Prefix:	bbsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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