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Supplemental Cash Flow Information Supplemental Disclosure of Non-cash Activity (Details) - USD ($)
$ in Thousands
9 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Supplemental disclosure of non-cash activity:    
Decrease in obligations related to land not owned under option agreements $ 0 $ (2,916)
Non-cash land acquisitions 8,265 12,904
Non-cash capital expenditure 0 674
Supplemental disclosure of cash activity:    
Interest payments 95,316 99,434
Income tax payments 1,219 474
Tax refunds received $ 198 0
Non-cash seller financing   7,800
Non-cash Land Acquisitions, Lot Takedown Costs   $ 5,100