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Contingencies And Commitments (Tables)
6 Months Ended
Jan. 31, 2012
Contractual Operating Lease Commitments
  Future minimum rental amounts by fiscal year
  2012 2013 2014 2015 2016 Thereafter
Operating lease
obligations
$ 12,271 $ 19,909 $ 15,328 $ 12,356 $ 10,347 $ 15,144
Ferrellgas, L.P. [Member]
 
Contractual Operating Lease Commitments
  Future minimum rental amounts by fiscal year
  2012 2013 2014 2015 2016 Thereafter
Operating lease
obligations
$ 12,271 $ 19,909 $ 15,328 $ 12,356 $ 10,347 $ 15,144