Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v3.7.0.1
Basis of Presentation (Details)
a in Thousands, $ in Thousands
6 Months Ended 12 Months Ended
Oct. 01, 2015
segment
Mar. 31, 2017
USD ($)
a
classification
segment
Mar. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Property, Plant and Equipment [Line Items]        
Number of business segments | segment 3 3    
Ownership interest (as a percent)   51.00% 51.00%  
Decrease in working capital | $       $ 1,184
Citree        
Property, Plant and Equipment [Line Items]        
Net income (loss) attributable to noncontrolling interest | $   $ 88 $ (37)  
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