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Fair Value Measurements - Financial Assets and Liabilities Measured on Recurring and Non-Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2014
Fair Value, Measurements, Recurring [Member]
  
Assets at Fair Value:  
Total assets at fair value $ 38,115
Liabilities at fair value:  
Total liabilities at fair value 704
Fair Value, Measurements, Recurring [Member] | Salsa Lisa [Member]
  
Liabilities at fair value:  
Total liabilities at fair value 704
Fair Value, Measurements, Recurring [Member] | Limoneira [Member]
  
Assets at Fair Value:  
Total assets at fair value 38,115
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
  
Assets at Fair Value:  
Total assets at fair value 38,115
Liabilities at fair value:  
Total liabilities at fair value   
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Salsa Lisa [Member]
  
Liabilities at fair value:  
Total liabilities at fair value   
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Limoneira [Member]
  
Assets at Fair Value:  
Total assets at fair value 38,115
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
  
Assets at Fair Value:  
Total assets at fair value   
Liabilities at fair value:  
Total liabilities at fair value   
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Salsa Lisa [Member]
  
Liabilities at fair value:  
Total liabilities at fair value   
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Limoneira [Member]
  
Assets at Fair Value:  
Total assets at fair value   
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
  
Assets at Fair Value:  
Total assets at fair value   
Liabilities at fair value:  
Total liabilities at fair value 704
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Salsa Lisa [Member]
  
Liabilities at fair value:  
Total liabilities at fair value 704
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Limoneira [Member]
  
Assets at Fair Value:  
Total assets at fair value   
Fair Value, Measurements, Non-recurring [Member]
  
Assets at Fair Value:  
Total assets at fair value 16,962
Fair Value, Measurements, Non-recurring [Member] | FreshRealm [Member]
  
Assets at Fair Value:  
Total assets at fair value 16,962
Fair Value, Measurements, Non-recurring [Member] | Level 1 [Member]
  
Assets at Fair Value:  
Total assets at fair value   
Fair Value, Measurements, Non-recurring [Member] | Level 1 [Member] | FreshRealm [Member]
  
Assets at Fair Value:  
Total assets at fair value   
Fair Value, Measurements, Non-recurring [Member] | Level 2 [Member]
  
Assets at Fair Value:  
Total assets at fair value   
Fair Value, Measurements, Non-recurring [Member] | Level 2 [Member] | FreshRealm [Member]
  
Assets at Fair Value:  
Total assets at fair value   
Fair Value, Measurements, Non-recurring [Member] | Level 3 [Member]
  
Assets at Fair Value:  
Total assets at fair value 16,962
Fair Value, Measurements, Non-recurring [Member] | Level 3 [Member] | FreshRealm [Member]
  
Assets at Fair Value:  
Total assets at fair value $ 16,962