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Supplemental Financial Statement Information (Schedule Of Inventories) (Details) - USD ($)
$ in Thousands
Jul. 31, 2017
Jul. 31, 2016
Propane gas and related products $ 67,049 $ 59,726
Energy Related Inventory, Petroleum 724 4,642
Appliances, parts and supplies 24,779 26,226
Inventories 92,552 90,594
Ferrellgas, L.P. [Member]    
Propane gas and related products 67,049 59,726
Energy Related Inventory, Petroleum 724 4,642
Appliances, parts and supplies 24,779 26,226
Inventories $ 92,552 $ 90,594