Annual report pursuant to Section 13 and 15(d)

Description of Business and Basis of Presentation - Narrative (Details)

v3.3.1.900
Description of Business and Basis of Presentation - Narrative (Details)
a in Thousands
12 Months Ended
Sep. 30, 2015
a
classification
segment
Property, Plant and Equipment [Line Items]  
Number of business segments | segment 5
Land  
Property, Plant and Equipment [Line Items]  
Number of primary classifications | classification 2
Area of land owned (in acres) | a 121
Number of primary classifications | classification 2
Mineral Rights  
Property, Plant and Equipment [Line Items]  
Area of land owned (in acres) | a 90