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Basis of Presentation - Narrative (Details) a in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) a classification segment | Jun. 30, 2016 USD ($) | Sep. 30, 2016 USD ($)
Property, Plant and Equipment [Line Items] |  |  |
Number of business segments | segment | 3 |  |
Ownership interest (as a percent) | 51.00% | 51.00% |
Decrease in working capital | $ |  |  | $ 1,184,000
Citree |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Net income (loss) attributable to noncontrolling interest | $ | $ 72,585 | $ (59,568) |
Land |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Area of land owned (in acres) | a | 122 |  |
Number of primary classifications | classification | 2 |  |
Mineral Rights |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Area of land owned (in acres) | a | 90 |  |

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- Definition Amount of Income (Loss) attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.19) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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