Receivables (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012
Receivable Details [Abstract]
Trade Accounts Receivable	$ 280,787	$ 271,199
Other Receivables	31,989	20,469
Accounts Receivable, Gross	312,776	291,668
Allowance for Doubtful Accounts Receivable	(2,473)	(2,746)
Accounts Receivable, Net	$ 310,303	$ 288,922