2.2.0.7 false Financial Instruments 00990 - Disclosure - Financial Instruments true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 2 false false 2 Footnote Financial Instruments 0 us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 3 Financial Instruments 1 bobe_FinancialInstrumentsTextblock bobe false na duration The fair values of our financial instruments, including long-term debt, approximate the carrying values. false false false false false false false false false false false terselabel false 1 false false false false 0 0 6. Financial InstrumentsThe fair values of our financial instruments (other than long-term debt) approximate their carrying values at July 30, 2010. At July 30, 2010, the estimated fair value of our long-term debt approximated $162.4 million compared to a carrying amount of $149.3 million. We estimate the fair value of our long-term debt based on the current interest rates offered for debt of the same maturities. We do not use derivative financial instruments for speculative purposes. 6. Financial InstrumentsThe fair values of our financial instruments (other than long-term debt) approximate their carrying values at July 30, 2010. At July false false false 2 false false false false 0 0     false false false us-types:textBlockItemType textblock The fair values of our financial instruments, including long-term debt, approximate the carrying values. No authoritative reference available. false 2 2 false UnKnown UnKnown UnKnown false true