Supplemental Financial Statement Information Supplemental Financial Statement Information (Other Assets) (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jul. 31, 2017
Accounts Receivable, Related Parties, Noncurrent	$ 36,371	$ 32,500
Other Assets	41,341	41,557
Other Assets, Noncurrent	77,712	74,057
Ferrellgas, L.P. [Member]
Accounts Receivable, Related Parties, Noncurrent	36,371	32,500
Other Assets	41,341	41,557
Other Assets, Noncurrent	$ 77,712	$ 74,057