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Other Compensation Plans (Details) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 3 Months Ended
Jan. 23, 2015
hour
Jan. 23, 2015
Defined Contribution Plan Disclosure [Line Items]    
Minimum hours of service required for 401(k) eligibility 1,000bobe_DefinedContributionPlanHoursofServiceRequiredforEligibility  
SG&A    
Defined Contribution Plan Disclosure [Line Items]    
401(k) contributions by employer   $ 1,915us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
Operating Wages and Fringe Benefit Expenses    
Defined Contribution Plan Disclosure [Line Items]    
Reduction to unused vacation liability   $ 909bobe_IncreaseDecreaseinEmployeeRelatedLiabilitiesAccruedVacation
/ us-gaap_IncomeStatementLocationAxis
= bobe_OperatingWagesandFringeBenefitExpensesMember