Description of Business and Basis of Presentation (Details) a in Thousands |
3 Months Ended | 12 Months Ended | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Oct. 01, 2015
segment
|
Sep. 30, 2018
USD ($)
a
classification
|
Jun. 30, 2018
USD ($)
|
Mar. 31, 2018
USD ($)
|
Dec. 31, 2017
USD ($)
|
Sep. 30, 2017
USD ($)
|
Jun. 30, 2017
USD ($)
|
Mar. 31, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
|
Sep. 30, 2018
USD ($)
a
classification
segment
|
Sep. 30, 2017
USD ($)
|
Sep. 30, 2016
USD ($)
segment
|
|
Property, Plant and Equipment [Line Items] | ||||||||||||
Number of business segments | segment | 2 | 2 | 2 | |||||||||
Net loss attributable to subsidiary | $ (218,000) | $ (8,000) | $ (16,000) | $ (8,000) | $ (81,000) | $ (7,000) | $ 51,000 | $ (8,000) | $ (250,000) | $ (45,000) | $ (34,000) | |
Net income (loss) | $ 718,000 | $ 9,100,000 | $ (5,514,000) | $ 8,746,000 | $ (19,028,000) | $ 5,479,000 | $ 5,833,000 | $ (1,735,000) | 13,050,000 | (9,451,000) | 6,993,000 | |
Citree | ||||||||||||
Property, Plant and Equipment [Line Items] | ||||||||||||
Net loss attributable to subsidiary | 511,854 | 91,432 | 69,230 | |||||||||
Net income (loss) | $ 261,046 | $ 46,630 | $ 35,307 | |||||||||
Land | ||||||||||||
Property, Plant and Equipment [Line Items] | ||||||||||||
Area of land owned (in acres) | a | 117 | 117 | ||||||||||
Number of primary classifications | classification | 2 | 2 | ||||||||||
Mineral Rights | ||||||||||||
Property, Plant and Equipment [Line Items] | ||||||||||||
Area of land owned (in acres) | a | 90 | 90 |