Transactions With Related Parties (Schedule Of Transactions With Related Parties) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Related Party Transaction [Line Items]
General and administrative expense	$ 9,978	$ 13,314	$ 36,526	$ 42,530
Ferrellgas, L.P. [Member]
Related Party Transaction [Line Items]
General and administrative expense	9,869	13,214	36,416	42,032
Compensation And Benefits [Member]
Related Party Transaction [Line Items]
Operating expense	53,747	59,907	170,953	174,943
General and administrative expense	6,913	7,957	23,713	22,297
Compensation And Benefits [Member] | Ferrellgas, L.P. [Member]
Related Party Transaction [Line Items]
Operating expense	53,747	59,907	170,953	174,943
General and administrative expense	$ 6,913	$ 7,957	$ 23,713	$ 22,297