Goodwill And Intangible Assets, Net (Estimated Amortization Expense) (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012
Estimated amortization expense, 2013	$ 21,130
Estimated amortization expense, 2014	17,862
Estimated amortization expense, 2015	15,035
Estimated amortization expense, 2016	14,864
Estimated amortization expense, 2017	14,288
Ferrellgas, L.P. [Member]
Estimated amortization expense, 2013	21,130
Estimated amortization expense, 2014	17,862
Estimated amortization expense, 2015	15,035
Estimated amortization expense, 2016	14,864
Estimated amortization expense, 2017	$ 14,288