Supplemental Cash Flow Information - Supplemental Disclosure of Non-cash Activity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Non-cash Land Acquisitions	$ 5,400	$ 0
Decrease in obligations related to land not owned under option agreements	(1,486)	(1,162)
Supplemental disclosure of cash activity: [Abstract]
Interest payments	43,778	39,024
Income tax payments	1	15
Tax refunds received	$ 0	$ 3,925