Derivative Instruments and Hedging Activities (Changes in Derivative Value Effect on Other Comprehensive Income Loss) (Details) - USD ($)
$ in Thousands |
3 Months Ended |
6 Months Ended |
|
|
Jan. 31, 2016 |
Jan. 31, 2015 |
Jan. 31, 2016 |
Jan. 31, 2015 |
Jul. 31, 2015 |
Jul. 31, 2014 |
| Beginning balance |
$ (33,317)
|
|
$ (33,317)
|
|
$ (38,934)
|
|
| Change in value of risk management derivatives |
(11,504)
|
$ (45,127)
|
(11,120)
|
$ (59,024)
|
|
|
| Reclassification of gains and losses on commodity hedges to cost of product sold - propane and other gas liquids sales |
8,567
|
7,360
|
16,793
|
6,232
|
|
|
| Ending balance |
(33,317)
|
|
(33,317)
|
|
|
|
| Ferrellgas, L.P. [Member] |
|
|
|
|
|
|
| Beginning balance |
(33,645)
|
|
(33,645)
|
|
(39,318)
|
|
| Change in value of risk management derivatives |
(11,504)
|
(45,127)
|
(11,120)
|
(59,024)
|
|
|
| Reclassification of gains and losses on commodity hedges to cost of product sold - propane and other gas liquids sales |
8,567
|
7,360
|
16,793
|
6,232
|
|
|
| Ending balance |
(33,645)
|
|
(33,645)
|
|
|
|
| Propane commodity derivatives [Member] |
|
|
|
|
|
|
| Change in value of risk management derivatives |
(10,760)
|
(42,910)
|
(9,175)
|
(55,668)
|
|
|
| Reclassification of gains and losses on commodity hedges to cost of product sold - propane and other gas liquids sales |
|
|
15,262
|
6,232
|
|
|
| Propane commodity derivatives [Member] | Ferrellgas, L.P. [Member] |
|
|
|
|
|
|
| Change in value of risk management derivatives |
(10,760)
|
(42,910)
|
(9,175)
|
(55,668)
|
|
|
| Reclassification of gains and losses on commodity hedges to cost of product sold - propane and other gas liquids sales |
|
|
15,262
|
6,232
|
|
|
| Interest Rate Swap [Member] |
|
|
|
|
|
|
| Change in value of risk management derivatives |
(744)
|
(2,217)
|
(1,945)
|
(3,356)
|
|
|
| Derivative, Net Hedge Ineffectiveness Gain (Loss) |
|
|
1,531
|
199
|
|
|
| Interest Rate Swap [Member] | Ferrellgas, L.P. [Member] |
|
|
|
|
|
|
| Change in value of risk management derivatives |
(744)
|
(2,217)
|
(1,945)
|
(3,356)
|
|
|
| Derivative, Net Hedge Ineffectiveness Gain (Loss) |
|
|
1,531
|
199
|
|
|
| Derivative [Member] |
|
|
|
|
|
|
| Beginning balance |
(33,233)
|
(46,110)
|
(33,233)
|
(46,110)
|
(38,906)
|
$ 6,483
|
| Ending balance |
(33,233)
|
(46,110)
|
(33,233)
|
(46,110)
|
|
|
| Derivative [Member] | Ferrellgas, L.P. [Member] |
|
|
|
|
|
|
| Beginning balance |
(33,233)
|
(46,110)
|
(33,233)
|
(46,110)
|
$ (38,906)
|
$ 6,483
|
| Ending balance |
$ (33,233)
|
$ (46,110)
|
$ (33,233)
|
$ (46,110)
|
|
|