Detail of Certain Balance Sheet Accounts - AP (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Accounts Payable and Accrued Liabilities [Abstract]
Accounts Payable, Trade	$ 39,879	$ 49,556
Accrued Employee Benefits	13,312	11,662
Accrued Insurance	5,229	7,040
Other Accrued Liabilities	10,253	10,722
Accounts Payable and Accrued Liabilities, Current	$ 68,673	$ 78,980