Derivative Instruments and Hedging Activities (Fair Value of Financial Derivatives Balance Sheet Locations) (Details) - USD ($)
$ in Thousands |
Jan. 31, 2016 |
Jul. 31, 2015 |
| Derivatives, Fair Value [Line Items] |
|
|
| Propane commodity derivative assets |
$ 6,957
|
$ 4,655
|
| Interest rate swap assets |
3,890
|
1,828
|
| Derivative assets, fair value |
10,847
|
6,483
|
| Propane commodity derivative liabilities |
42,745
|
42,375
|
| Interest rate swap liabilities |
4,210
|
4,748
|
| Derivative liabilities, fair value |
46,955
|
47,123
|
| Ferrellgas, L.P. [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Propane commodity derivative assets |
6,957
|
4,655
|
| Interest rate swap assets |
3,890
|
1,828
|
| Derivative assets, fair value |
10,847
|
6,483
|
| Propane commodity derivative liabilities |
42,745
|
42,375
|
| Interest rate swap liabilities |
4,210
|
4,748
|
| Derivative liabilities, fair value |
46,955
|
47,123
|
| Prepaid Expenses and Other Current Assets [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Propane commodity derivative assets |
4,330
|
3,614
|
| Interest rate swap assets |
1,723
|
1,828
|
| Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net |
|
0
|
| Prepaid Expenses and Other Current Assets [Member] | Ferrellgas, L.P. [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Propane commodity derivative assets |
4,330
|
3,614
|
| Interest rate swap assets |
1,723
|
1,828
|
| Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net |
0
|
0
|
| Other assets, net [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Propane commodity derivative assets |
415
|
1,041
|
| Interest rate swap assets |
2,167
|
0
|
| Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net |
0
|
0
|
| Other assets, net [Member] | Ferrellgas, L.P. [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Propane commodity derivative assets |
415
|
1,041
|
| Interest rate swap assets |
2,167
|
0
|
| Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net |
0
|
0
|
| Other Current Liabilities [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Propane commodity derivative liabilities |
25,956
|
27,929
|
| Interest rate swap liabilities |
2,374
|
2,241
|
| Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value |
4,945
|
1,280
|
| Other Current Liabilities [Member] | Ferrellgas, L.P. [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Propane commodity derivative liabilities |
25,956
|
27,929
|
| Interest rate swap liabilities |
2,374
|
2,241
|
| Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value |
4,945
|
1,280
|
| Other Liabilities [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Propane commodity derivative liabilities |
8,011
|
12,034
|
| Interest rate swap liabilities |
1,836
|
2,507
|
| Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value |
2,201
|
1,132
|
| Other Liabilities [Member] | Ferrellgas, L.P. [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Propane commodity derivative liabilities |
8,011
|
12,034
|
| Interest rate swap liabilities |
1,836
|
2,507
|
| Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value |
2,201
|
$ 1,132
|
| Propane and related equipment sales [Member] | Prepaid Expenses and Other Current Assets [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net |
0
|
|
| Midstream - Crude Oil Logistics [Member] | Prepaid Expenses and Other Current Assets [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net |
2,212
|
|
| Midstream - Crude Oil Logistics [Member] | Prepaid Expenses and Other Current Assets [Member] | Ferrellgas, L.P. [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net |
2,212
|
|
| Midstream - Crude Oil Logistics [Member] | Other Current Liabilities [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value |
1,632
|
|
| Midstream - Crude Oil Logistics [Member] | Other Current Liabilities [Member] | Ferrellgas, L.P. [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value |
$ 1,632
|
|