Partners' Capital (Dividends Expected To Be Paid To Related Parties) (Details) (Subsequent Event [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2013
Ferrell Companies [Member]
Distribution Expected To Be Made to Member or Limited Partner [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared	$ 10,735
FCI Trading Corp. [Member]
Distribution Expected To Be Made to Member or Limited Partner [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared	98
Ferrell Propane, Inc. [Member]
Distribution Expected To Be Made to Member or Limited Partner [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared	26
James E. Ferrell [Member]
Distribution Expected To Be Made to Member or Limited Partner [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared	2,179
General Partner [Member]
Distribution Expected To Be Made to Member or Limited Partner [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared	$ 399