Supplemental Financial Statement Information (Other Current Liabilities) (Details) - USD ($)
$ in Thousands
Jan. 31, 2016
Jul. 31, 2015
Accrued interest $ 16,861 $ 17,281
Accrued payroll 13,978 17,485
Customer deposits and advances 30,226 28,792
Price risk management liabilities 34,907 31,450
Other 54,962 85,679
Other current liabilities 150,934 180,687
Ferrellgas, L.P. [Member]    
Accrued interest 14,855 15,275
Accrued payroll 13,978 17,485
Customer deposits and advances 30,226 28,792
Price risk management liabilities 34,907 31,450
Other 54,962 83,174
Other current liabilities $ 148,928 $ 176,176